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Kaplan DI, Boyanov MI, Losey NA, Lin P, Xu C, O’Loughlin EJ, Santschi PH, Xing W, Kuhne WW, Kemner KM. Uranium Biogeochemistry in the Rhizosphere of a Contaminated Wetland. Environ Sci Technol 2024; 58:6381-6390. [PMID: 38547454 PMCID: PMC11008245 DOI: 10.1021/acs.est.3c10481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Revised: 03/08/2024] [Accepted: 03/11/2024] [Indexed: 04/10/2024]
Abstract
The objective of this study was to determine if U sediment concentrations in a U-contaminated wetland located within the Savannah River Site, South Carolina, were greater in the rhizosphere than in the nonrhizosphere. U concentrations were as much as 1100% greater in the rhizosphere than in the nonrhizosphere fractions; however and importantly, not all paired samples followed this trend. Iron (but not C, N, or S) concentrations were significantly enriched in the rhizosphere. XAS analyses showed that in both sediment fractions, U existed as UO22+ coordinated with iron(III)-oxides and organic matter. A key difference between the two sediment fractions was that a larger proportion of U was adsorbed to Fe(III)-oxides, not organic matter, in the rhizosphere, where significantly greater total Fe concentrations and greater proportions of ferrihydrite and goethite existed. Based on 16S rRNA analyses, most bacterial sequences in both paired samples were heterotrophs, and population differences were consistent with the generally more oxidizing conditions in the rhizosphere. Finally, U was very strongly bound to the whole (unfractionated) sediments, with an average desorption Kd value (Usediment/Uaqueous) of 3972 ± 1370 (mg-U/kg)/(mg-U/L). Together, these results indicate that the rhizosphere can greatly enrich U especially in wetland areas, where roots promote the formation of reactive Fe(III)-oxides.
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Affiliation(s)
- Daniel I. Kaplan
- Savannah
River Ecology Laboratory, University of
Georgia, Aiken, South Carolina 29802, United States
| | - Maxim I. Boyanov
- Argonne
National Laboratory, Lemont, Illinois 60439, United States
- Chemical
Engineering, Bulgarian Academy of Sciences, Sofia 1040, Bulgaria
| | - Nathaniel A. Losey
- Savannah
River National Laboratory, Aiken, South Carolina 29808, United States
| | - Peng Lin
- Savannah
River Ecology Laboratory, University of
Georgia, Aiken, South Carolina 29802, United States
| | - Chen Xu
- Marine
& Coastal Environmental Science, Texas
A&M University − Galveston, Galveston, Texas 77553, United States
| | | | - Peter H. Santschi
- Marine
& Coastal Environmental Science, Texas
A&M University − Galveston, Galveston, Texas 77553, United States
| | - Wei Xing
- Savannah
River Ecology Laboratory, University of
Georgia, Aiken, South Carolina 29802, United States
| | - Wendy W. Kuhne
- Savannah
River National Laboratory, Aiken, South Carolina 29808, United States
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2
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Guo X, Zhou Q, Wang C, Cao Y, Yang X, Wei S, Xu W, Chen S, Zhu K, Zhang P, Shou H, Wang Y, Chimtali PJ, Wu X, Song L, Liu X. Universal Intercalation/Alloying Hybrid Mechanism with -ICOHP Criterion in MAX Toward Steadily Ascending Lithium-Ion Batteries. Small 2024:e2400099. [PMID: 38507728 DOI: 10.1002/smll.202400099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 02/28/2024] [Indexed: 03/22/2024]
Abstract
Profiting from the unique atomic laminated structure, metallic conductivity, and superior mechanical properties, transition metal carbides and nitrides named MAX phases have shown great potential as anodes in lithium-ion batteries. However, the complexity of MAX configurations poses a challenge. To accelerate such application, a minus integrated crystal orbital Hamilton populations descriptor is innovatively proposed to rapidly evaluate the lithium storage potential of various MAX, along with density functional theory computations. It confirms that surface A-element atoms bound to lithium ions have odds of escaping from MAX. Interestingly, the activated A-element atoms enhance the reversible uptake of lithium ions by MAX anodes through an efficient alloying reaction. As an experimental verification, the charge compensation and SnxLiy phase evolution of designed Zr2SnC MAX with optimized structure is visualized via in situ synchrotron radiation XRD and XAFS technique, which further clarifies the theoretically expected intercalation/alloying hybrid storage mechanism. Notably, Zr2SnC electrodes achieve remarkably 219.8% negative capacity attenuation over 3200 cycles at 1 A g-1. In principle, this work provides a reference for the design and development of advanced MAX electrodes, which is essential to explore diversified applications of the MAX family in specific energy fields.
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Affiliation(s)
- Xin Guo
- National Synchrotron Radiation Laboratory, Key Laboratory of Precision and Intelligent Chemistry, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230029, P. R. China
| | - Quan Zhou
- National Synchrotron Radiation Laboratory, Key Laboratory of Precision and Intelligent Chemistry, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230029, P. R. China
| | - Changda Wang
- National Synchrotron Radiation Laboratory, Key Laboratory of Precision and Intelligent Chemistry, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230029, P. R. China
| | - Yuyang Cao
- National Synchrotron Radiation Laboratory, Key Laboratory of Precision and Intelligent Chemistry, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230029, P. R. China
| | - Xiya Yang
- National Synchrotron Radiation Laboratory, Key Laboratory of Precision and Intelligent Chemistry, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230029, P. R. China
| | - Shiqiang Wei
- National Synchrotron Radiation Laboratory, Key Laboratory of Precision and Intelligent Chemistry, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230029, P. R. China
| | - Wenjie Xu
- National Synchrotron Radiation Laboratory, Key Laboratory of Precision and Intelligent Chemistry, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230029, P. R. China
| | - Shuangming Chen
- National Synchrotron Radiation Laboratory, Key Laboratory of Precision and Intelligent Chemistry, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230029, P. R. China
| | - Kefu Zhu
- National Synchrotron Radiation Laboratory, Key Laboratory of Precision and Intelligent Chemistry, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230029, P. R. China
| | - Pengjun Zhang
- National Synchrotron Radiation Laboratory, Key Laboratory of Precision and Intelligent Chemistry, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230029, P. R. China
| | - Hongwei Shou
- National Synchrotron Radiation Laboratory, Key Laboratory of Precision and Intelligent Chemistry, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230029, P. R. China
| | - Yixiu Wang
- National Synchrotron Radiation Laboratory, Key Laboratory of Precision and Intelligent Chemistry, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230029, P. R. China
| | - Peter Joseph Chimtali
- National Synchrotron Radiation Laboratory, Key Laboratory of Precision and Intelligent Chemistry, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230029, P. R. China
| | - Xiaojun Wu
- School of Chemistry and Material Sciences, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Li Song
- National Synchrotron Radiation Laboratory, Key Laboratory of Precision and Intelligent Chemistry, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230029, P. R. China
- Zhejiang Institute of Photonelectronics, Jinhua, Zhejiang, 321004, P. R. China
| | - Xiaosong Liu
- National Synchrotron Radiation Laboratory, Key Laboratory of Precision and Intelligent Chemistry, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, 230029, P. R. China
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3
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Sun L, Pan X, Xie YN, Zheng J, Xu S, Li L, Zhao G. Accelerated Dynamic Reconstruction in Metal-Organic Frameworks with Ligand Defects for Selective Electrooxidation of Amines to Azos Coupling with Hydrogen Production. Angew Chem Int Ed Engl 2024:e202402176. [PMID: 38470010 DOI: 10.1002/anie.202402176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 02/28/2024] [Accepted: 03/09/2024] [Indexed: 03/13/2024]
Abstract
Electrosynthesis coupled hydrogen production (ESHP) mostly involves catalyst reconstruction in aqueous phase, but accurately identifying and controlling the process is still a challenge. Herein, we modulated the electronic structure and exposed unsaturated sites of metal-organic frameworks (MOFs) via ligand defect to promote the reconstruction of catalyst for azo electrosynthesis (ESA) coupled with hydrogen production overall reaction. The monolayer Ni-MOFs achieved 89.8 % Faraday efficiency and 90.8 % selectivity for the electrooxidation of 1-methyl-1H-pyrazol-3-amine (Pyr-NH2) to azo, and an 18.5-fold increase in H2 production compared to overall water splitting. Operando X-ray absorption fine spectroscopy (XAFS) and various in situ spectroscopy confirm that the ligand defect promotes the potential dependent dynamic reconstruction of Ni(OH)2 and NiOOH, and the reabsorption of ligand significantly lowers the energy barrier of rate-determining step (*Pyr-NH to *Pyr-N). This work provides theoretical guidance for modulation of electrocatalyst reconstruction to achieve highly selective ESHP.
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Affiliation(s)
- Lingzhi Sun
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai, 200092, P. R. China
| | - Xun Pan
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai, 200092, P. R. China
| | - Ya-Nan Xie
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai, 200092, P. R. China
| | - Jingui Zheng
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai, 200092, P. R. China
| | - Shaohan Xu
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai, 200092, P. R. China
| | - Lina Li
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Shanghai, 201800, P. R. China
| | - Guohua Zhao
- School of Chemical Science and Engineering, Shanghai Key Lab of Chemical Assessment and Sustainability, Tongji University, Shanghai, 200092, P. R. China
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4
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Xie M, Shimogawa R, Liu Y, Zhang L, Foucher AC, Routh PK, Stach EA, Frenkel AI, Knecht MR. Biomimetic Control over Bimetallic Nanoparticle Structure and Activity via Peptide Capping Ligand Sequence. ACS Nano 2024; 18:3286-3294. [PMID: 38227802 DOI: 10.1021/acsnano.3c10016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2024]
Abstract
The controlled design of bimetallic nanoparticles (BNPs) is a key goal in tailoring their catalytic properties. Recently, biomimetic pathways demonstrated potent control over the distribution of different metals within BNPs, but a direct understanding of the peptide effect on the compositional distribution at the interparticle and intraparticle levels remains lacking. We synthesized two sets of PtAu systems with two peptides and correlated their structure, composition, and distributions with the catalytic activity. Structural and compositional analyses were performed by a combined machine learning-assisted refinement of X-ray absorption spectra and Z-contrast measurements by scanning transmission electron microscopy. The difference in the catalytic activities between nanoparticles synthesized with different peptides was attributed to the details of interparticle distribution of Pt and Au across these markedly heterogeneous systems, comprising Pt-rich, Au-rich, and Au core/Pt shell nanoparticles. The total amount of Pt in the shells of the BNPs was proposed to be the key catalytic activity descriptor. This approach can be extended to other systems of metals and peptides to facilitate the targeted design of catalysts with the desired activity.
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Affiliation(s)
- Maichong Xie
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
| | - Ryuichi Shimogawa
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
- Mitsubishi Chemical Corporation, Science & Innovation Center, 1000, Kamoshida-cho, Aoba-ku, Yokohama 227-8502, Japan
| | - Yang Liu
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Lihua Zhang
- Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Alexandre C Foucher
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Prahlad K Routh
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Eric A Stach
- Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States
| | - Anatoly I Frenkel
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Marc R Knecht
- Department of Chemistry, University of Miami, Coral Gables, Florida 33146, United States
- Dr. J.T. Macdonald Foundation Biomedical Nanotechnology Institute, University of Miami, Miami, Florida 33136, United States
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5
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Lin Y, Wang YG, Li X, Zhao J, Liu H, Wu C, Yang L, Li G, Qi Z, Shan L, Jiang Y, Song L. Constructing Asymmetric Charge Polarized NiCo Prussian Blue Analogue for Promoted Electrocatalytic Methanol to Formate Conversion. Small 2023:e2311452. [PMID: 38145341 DOI: 10.1002/smll.202311452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Indexed: 12/26/2023]
Abstract
The highly selective electrochemical conversion of methanol to formate is of great significance for various clean energy devices, but understanding the structure-to-property relationship remains unclear. Here, the asymmetric charge polarized NiCo prussian blue analogue (NiCo PBA-100) is reported to exhibit remarkable catalytic performance with high current density (210 mA cm-2 @1.65 V vs RHE) and Faraday efficiency (over 90%). Meanwhile, the hybrid water splitting and Zinc-methanol-battery assembled by NiCo PBA-100 display the promoted performance with decent stability. X-ray absorption spectroscopy (XAS) and operando Raman spectroscopy indicate that the asymmetric charge polarization in NiCo PBA leads to more unoccupied states of Ni and occupied states of Co, thereby facilitating the rapid transformation of the high-active catalytic centers. Density functional theory calculations combining operando Fourier transform infrared spectroscopy demonstrate that the final reconstructed catalyst derived by NiCo PBA-100 exhibits rearranged d band properties along with a lowered energy barrier of the rate-determining step and favors the desired formate production.
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Affiliation(s)
- Yunxiang Lin
- Institutes of Physical Science and Information Technology, School of Materials Science and Engineering Leibniz International Joint Research Center of Materials Sciences of Anhui Province Center of High Magnetic Fields and Free Electron Lasers, Information Meterials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei, 230601, China
| | - Yan-Ge Wang
- Institutes of Physical Science and Information Technology, School of Materials Science and Engineering Leibniz International Joint Research Center of Materials Sciences of Anhui Province Center of High Magnetic Fields and Free Electron Lasers, Information Meterials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei, 230601, China
| | - Xiaoyu Li
- Institutes of Physical Science and Information Technology, School of Materials Science and Engineering Leibniz International Joint Research Center of Materials Sciences of Anhui Province Center of High Magnetic Fields and Free Electron Lasers, Information Meterials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei, 230601, China
| | - Jiahui Zhao
- Institutes of Physical Science and Information Technology, School of Materials Science and Engineering Leibniz International Joint Research Center of Materials Sciences of Anhui Province Center of High Magnetic Fields and Free Electron Lasers, Information Meterials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei, 230601, China
| | - Hengjie Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, China
| | - Chuanqiang Wu
- Institutes of Physical Science and Information Technology, School of Materials Science and Engineering Leibniz International Joint Research Center of Materials Sciences of Anhui Province Center of High Magnetic Fields and Free Electron Lasers, Information Meterials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei, 230601, China
| | - Li Yang
- Institutes of Physical Science and Information Technology, School of Materials Science and Engineering Leibniz International Joint Research Center of Materials Sciences of Anhui Province Center of High Magnetic Fields and Free Electron Lasers, Information Meterials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei, 230601, China
- Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, 01328, Dresden, Germany
| | - Guang Li
- Institutes of Physical Science and Information Technology, School of Materials Science and Engineering Leibniz International Joint Research Center of Materials Sciences of Anhui Province Center of High Magnetic Fields and Free Electron Lasers, Information Meterials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei, 230601, China
| | - Zeming Qi
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, China
| | - Lei Shan
- Institutes of Physical Science and Information Technology, School of Materials Science and Engineering Leibniz International Joint Research Center of Materials Sciences of Anhui Province Center of High Magnetic Fields and Free Electron Lasers, Information Meterials and Intelligent Sensing Laboratory of Anhui Province, Anhui University, Hefei, 230601, China
| | - Yong Jiang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
- School of Electronic and Information Engineering, Tiangong University, Tianjin, 300387, China
| | - Li Song
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230029, China
- Zhejiang Institute of Photonelectronics, Jinhua, Zhejiang, 321004, China
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6
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Kanega R, Ishida E, Sakai T, Onishi N, Yamamoto A, Yasumura H, Yoshida H, Kawanami H, Himeda Y, Sato Y, Ohira A. An Aqueous Redox Flow Battery Using CO 2 as an Active Material with a Homogeneous Ir Catalyst. Angew Chem Int Ed Engl 2023; 62:e202310976. [PMID: 37650440 DOI: 10.1002/anie.202310976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/28/2023] [Accepted: 08/28/2023] [Indexed: 09/01/2023]
Abstract
For the application of CO2 as an energy storage material, a H2 storage system has been proposed based on the interconversion of CO2 and formic acid (or formate). However, energy losses are inevitable in the conversion of electrical energy to H2 as chemical energy (≈70 % electrical efficiency) and H2 to electrical energy (≈40 % electrical efficiency). To overcome these significant energy losses, we developed a system based on the interconversion of CO2 and formate for the direct storage and generation of electricity. In this paper, we report an aqueous redox flow battery system using homogeneous Ir catalysts with CO2 -formate redox pair. The system exhibited a maximum discharge capacity of 10.5 mAh (1.5 Ah L-1 ), capacity decay of 0.2 % per cycle, and total turnover number of 2550 after 50 cycles. During charging-discharging, in situ fluorescence X-ray absorption fine structure spectroscopy based on an online setup indicated that the active species was in a high valence state of IrIV .
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Affiliation(s)
- Ryoichi Kanega
- Research Institute for Energy Conservation, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
| | - Erika Ishida
- Research Institute for Energy Conservation, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
| | - Takaaki Sakai
- Global Zero Emission Research Center, National Institute of Advanced Industrial Science and Technology Tsukuba West, 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan
| | - Naoya Onishi
- Global Zero Emission Research Center, National Institute of Advanced Industrial Science and Technology Tsukuba West, 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan
| | - Akira Yamamoto
- Department of Interdisciplinary Environment, Graduate School of Human and Environmental Studies, Kyoto University Yoshida Nihonmatsu-cho, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Hiroki Yasumura
- Faculty of Integrated Human Studies, Kyoto University Yoshida Nihonmatsu-cho, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Hisao Yoshida
- Department of Interdisciplinary Environment, Graduate School of Human and Environmental Studies, Kyoto University Yoshida Nihonmatsu-cho, Sakyo-ku, Kyoto, 606-8501, Japan
| | - Hajime Kawanami
- Global Zero Emission Research Center, National Institute of Advanced Industrial Science and Technology Tsukuba West, 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan
| | - Yuichiro Himeda
- Global Zero Emission Research Center, National Institute of Advanced Industrial Science and Technology Tsukuba West, 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan
| | - Yukari Sato
- Research Institute for Energy Conservation, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
| | - Akihiro Ohira
- Research Institute for Energy Conservation, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8565, Japan
- Global Zero Emission Research Center, National Institute of Advanced Industrial Science and Technology Tsukuba West, 16-1 Onogawa, Tsukuba, Ibaraki, 305-8569, Japan
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7
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Bai P, Lei K, Xie J, Wang H, Kang X, Wang X. Pd/Ni bimetallic modification of SrTiO 3for enhancement of photocatalytic water splitting. Nanotechnology 2023; 34:465404. [PMID: 37567161 DOI: 10.1088/1361-6528/acef2e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Accepted: 08/10/2023] [Indexed: 08/13/2023]
Abstract
This paper investigates the impact of Pd/Ni modification on the photocatalytic hydrogen production performance of SrTiO3(STO). STO catalysts were synthesized using a hydrothermal method, and Pd/Ni modification was applied on the surface of STO through chemical deposition. Experimental results demonstrate that the hydrogen evolution rate of Pd/Ni-modified STO (Pd/Ni-STO) reaches 2232.14μmol g-1h-1. X-ray absorption fine structure spectroscopy analysis reveals substitutional doping of Ni with Ti and coordination of Pd with surface O. X-ray photoelectron spectroscopy analysis indicates the introduction of oxygen vacancies due to Pd/Ni doping. Density functional theory calculations suggest that Ni doping activates neighboring Ti atoms, leading to the formation of bimetallic catalytic sites composed of oxygen vacancies and Ti atoms, greatly enhancing the photocatalytic hydrogen evolution performance. This study not only provides an effective catalyst for photocatalytic applications but also offers insights into the underlying mechanism, which may stimulate the development of metal-doped catalytic materials and have implications for a range of other applications.
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Affiliation(s)
- Penghui Bai
- School of New Energy and Materials, Southwest Petroleum University (SWPU), Chengdu 610500, People's Republic of China
| | - Kai Lei
- Sichuan Province Academy of Industrial Environmental Monitoring, Chengdu 610041, People's Republic of China
| | - Juan Xie
- School of New Energy and Materials, Southwest Petroleum University (SWPU), Chengdu 610500, People's Republic of China
| | - Hu Wang
- School of New Energy and Materials, Southwest Petroleum University (SWPU), Chengdu 610500, People's Republic of China
| | - Xiaolan Kang
- School of New Energy and Materials, Southwest Petroleum University (SWPU), Chengdu 610500, People's Republic of China
| | - Xia Wang
- School of New Energy and Materials, Southwest Petroleum University (SWPU), Chengdu 610500, People's Republic of China
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8
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Hasegawa N, Takahashi Y, Itai T. Tissue-variation of iron stable isotopes in marine fish coupled with speciation analysis using X-ray absorption fine structure. Sci Total Environ 2023; 881:163449. [PMID: 37061065 DOI: 10.1016/j.scitotenv.2023.163449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Revised: 03/23/2023] [Accepted: 04/07/2023] [Indexed: 06/01/2023]
Abstract
The Fe stable isotope ratio (δ56Fe) in tissues is a potential parameter for examining the Fe metabolism in marine fish. Although the effect of ferritin storage has been proposed as a possible cause of heavy isotope (56Fe) enrichment in the liver, no speciation and stable isotope ratio coupling data are available. Here, we report the δ56Fe values measured by multicollector ICP-MS and the result of Fe K-edge X-ray absorption near-edge structure (XANES) analysis of multiple tissues obtained from a skipjack tuna (Katsuwonus pelamis) and a chub mackerel (Scomber japonicus). Apparent isotopic fractionation between the liver and the muscle samples (Δ56FeL-M = δ56Feliver - δ56Femuscle) from these species was observed (0.85 ‰ and 0.57 ‰, respectively). The dominant Fe species in the muscle was heme Fe (the sum of methemoglobin, oxyhemoglobin, and deoxyhemoglobin), while ferritin was not detected according to the linear combination fitting of the XANES spectra. In the liver, ferritin contribution was ca. 28 %-54 % of the total Fe content. The apparent difference in δ56Fe between heme Fe and ferritin was estimated to range from 1.41 ‰ to 1.52 ‰ based on the tissue-specific δ56Fe values and the XANES results. These results indicate that the Fe storage as ferritin does not induce the lowering of δ56Fe in the muscle, considering the low contribution of the liver Fe to the total Fe content in the body.
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Affiliation(s)
- Nanako Hasegawa
- Department of Earth and Planetary Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
| | - Yoshio Takahashi
- Department of Earth and Planetary Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Takaaki Itai
- Department of Earth and Planetary Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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9
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Goswami O, Rouff AA. Interaction of divalent metals with struvite: sorption, reversibility, and implications for mineral recovery from wastes. Environ Technol 2023; 44:2315-2326. [PMID: 35019833 DOI: 10.1080/09593330.2022.2027026] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 12/21/2021] [Indexed: 06/04/2023]
Abstract
Phosphorus (P) recovered from wastewater as struvite (MgNH4PO4·6H2O) can meet high P demands in the agricultural sector by reuse as a P fertiliser. Heavy metals are prevalent in wastewaters and are common fertiliser contaminants, therefore struvite as a sorbent for metals requires evaluation. Struvite sorption experiments were conducted in model solutions with cadmium (Cd), cobalt (Co), copper (Cu), nickel (Ni), lead (Pb), and zinc (Zn) at 1-5 μM concentrations from pH 7-10. The struvite metal loading increased with dissolved metal concentration and pH, ranging from 2 to 493 mg kg-1. Highest loadings were observed for 5 μM Pb, which exceeded the 120 mg kg-1 European Union (EU) struvite fertiliser limit at all pH values. At 5 μM concentrations, Ni and Cd loadings exceeded EU limits of 100 mg kg-1 at pH 10, and 60 mg kg-1 at pH 8-10, respectively. In desorption experiments, 10-85% metal was released after resuspension in metal-free solutions, with a positive correlation between initial loading and amount desorbed. Distortions of the struvite phosphate band, by Fourier transformation infrared (FTIR) spectroscopy, indicated lowered symmetry of phosphate vibrations with metal sorption. X-ray absorption fine structure spectroscopy (XAFS) analysis of pH 9 solids indicated tetrahedral coordination for Cu and Zn, octahedral coordination for Co and Ni, and Pb in 9-fold coordination. Precipitation of Pb-phosphate minerals was a primary mechanism for Pb sorption. The results provide insight into metal contaminant sorption with struvite in wastewaters, and the potential for metal desorption after recovery.
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Affiliation(s)
- Omanjana Goswami
- Department of Earth and Environmental Sciences, Rutgers University, Newark, NJ, U.S.A
| | - Ashaki A Rouff
- Department of Earth and Environmental Sciences, Rutgers University, Newark, NJ, U.S.A
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10
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Bai P, Wang C, Xie J, Wang H, Kang X, Chen M, Wang X. Ni-anchored g-C3N4 for improved hydrogen evolution in photocatalysis. Nanotechnology 2023. [PMID: 37257444 DOI: 10.1088/1361-6528/acda3c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In this study, we present a facile wet chemical method for synthesizing Ni-modified polymeric carbon nitride (g-C3N4) nanosheets. X-ray absorption fine structure spectroscopy (XAFS) reveals the formation of a unique Ni-N structure, resulting from Ni atoms anchoring in cavities of g-C3N4. The Ni anchoring on the surface N sites modifies the electronic structure of g-C3N4, demonstrating remarkable effectiveness even at low anchoring amounts. The as-prepared Ni/g-C3N4 catalysts show robust performance for photocatalytic hydrogen evolution under visible light irradiation, attributed to the unique Ni-N interactions. Specifically, the photocatalytic H2 production rate of the Ni/CN-45 catalyst reached 8482.14 μmol·g-1·h-1 with an apparent quantum efficiency (AQE) of 0.75% under light irradiation at 427 nm. This rate surpasses most of the previously reported g-C3N4 based photocatalysts and is nearly 8 times higher than that of the pure g-C3N4 catalyst (1116.07 μmol·g-1·h-1).
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Affiliation(s)
- Penghui Bai
- Southwest Petroleum University, 8#, Xindu Ave, Xindu, Chendu, China, Chengdu, 610500, CHINA
| | - Chenjie Wang
- Southwest Petroleum University, 8#, Xindu Ave, Xindu, Chendu, China, Chengdu, 610500, CHINA
| | - Juan Xie
- Southwest Petroleum University, 8#, Xindu Ave, Xindu, Chendu, China, Chengdu, 610500, CHINA
| | - Hu Wang
- Southwest Petroleum University, 8#, Xindu Ave, Xindu, Chendu, China, Chengdu, 610500, CHINA
| | - Xiaolan Kang
- Southwest Petroleum University, 8#, Xindu Ave, Xindu, Chendu, China, Chengdu, 610500, CHINA
| | - Mi Chen
- Southwest Petroleum University, 8#, Xindu Ave, Xindu, Chendu, China, Chengdu, 610500, CHINA
| | - Xia Wang
- Southwest Petroleum University, 8#, Xindu Ave, Xindu, Chendu, China, Chengdu, 610500, CHINA
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11
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Hu X, Qu C, Han Y, Sun P, Cai P, Chen W, Huang Q. Elevated temperature induces contrasting transformation of exogenous copper to soil solution and solid phases in an arable soil. Ecotoxicol Environ Saf 2023; 255:114744. [PMID: 36931086 DOI: 10.1016/j.ecoenv.2023.114744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2022] [Revised: 01/19/2023] [Accepted: 03/06/2023] [Indexed: 06/18/2023]
Abstract
Heavy metal contamination of soils has been a global environmental issue over the past decades, threatening food security and human health. Understanding the migration and transformation of heavy metals in soils is critical for restoring an impaired environment and developing sustainable agriculture, particularly in the face of global warming. However, little effort has been devoted to investigating the impact of elevated temperatures on the migration and distribution of exogenous heavy metals in soils. This study experimented with a 180-day incubation at 15 °C, 30 °C, and 45 °C with an arable soil (Alfisol) of Huang-Huai-Hai River Basin, China, which was initially spiked with copper (Cu). A comparison of the results revealed that the percentage of soil water-soluble Cu doubled at 45 °C compared with 15 °C. The percentage of protein-like substances in dissolved organic matter (DOM) was the highest at 45 °C, suggesting that proteinaceous components play a more significant role in controlling the dissolution of Cu into DOM. Moreover, by sequential extraction and micro-X-ray fluorescence (μ-XRF), Cu was facilitatively transformed from exchangeable, and specifically adsorbed fractions, to iron (Fe)/manganese (Mn) oxides bound species by 7.75%23.63% with the elevation of temperature from 15 °C to 45 °C. The conversion of Cu speciation is attributed to the significant release of organic carbon from Fe/Mn oxides, especially the Mn oxide components, which are available for Cu binding. The findings of this work will provide an in-depth understanding of the fate of Cu in soils, which is fundamental for the risk assessment and remediation of Cu-polluted soils in the Huang-Huai-Hai River Basin under the context of global warming.
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Affiliation(s)
- Xiping Hu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; Hubei Key Laboratory of Soil Environment and Pollution Remediation, Huazhong Agricultural University, Wuhan 430070, China
| | - Chenchen Qu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; Hubei Key Laboratory of Soil Environment and Pollution Remediation, Huazhong Agricultural University, Wuhan 430070, China
| | - Yafeng Han
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; Hubei Key Laboratory of Soil Environment and Pollution Remediation, Huazhong Agricultural University, Wuhan 430070, China
| | - Pan Sun
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; Hubei Key Laboratory of Soil Environment and Pollution Remediation, Huazhong Agricultural University, Wuhan 430070, China
| | - Peng Cai
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; Hubei Key Laboratory of Soil Environment and Pollution Remediation, Huazhong Agricultural University, Wuhan 430070, China; China-Australia Research Laboratory on Environmental Biogeochemistry, Huazhong Agricultural University, China; State Environmental Protection Key Laboratory of Soil Health and Green Remediation, Wuhan 430070, China
| | - Wenli Chen
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Qiaoyun Huang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China; Hubei Key Laboratory of Soil Environment and Pollution Remediation, Huazhong Agricultural University, Wuhan 430070, China; China-Australia Research Laboratory on Environmental Biogeochemistry, Huazhong Agricultural University, China; State Environmental Protection Key Laboratory of Soil Health and Green Remediation, Wuhan 430070, China.
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12
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Du M, Guo L, Ren H, Tao X, Li Y, Nan B, Si R, Chen C, Li L. Non-Noble FeCrO x Bimetallic Nanoparticles for Efficient NH 3 Decomposition. Nanomaterials (Basel) 2023; 13:1280. [PMID: 37049373 PMCID: PMC10096975 DOI: 10.3390/nano13071280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 03/24/2023] [Accepted: 03/28/2023] [Indexed: 06/19/2023]
Abstract
Ammonia has the advantages of being easy to liquefy, easy to store, and having a high hydrogen content of 17.3 wt%, which can be produced without COx through an ammonia decomposition using an appropriate catalyst. In this paper, a series of FeCr bimetallic oxide nanocatalysts with a uniform morphology and regulated composition were synthesized by the urea two-step hydrolysis method, which exhibited the high-performance decomposition of ammonia. The effects of different FeCr metal ratios on the catalyst particle size, morphology, and crystal phase were investigated. The Fe0.75Cr0.25 sample exhibited the highest catalytic activity, with an ammonia conversion of nearly 100% at 650 °C. The dual metal catalysts clearly outperformed the single metal samples in terms of their catalytic performance. Besides XRD, XPS, and SEM being used as the means of the conventional characterization, the local structural changes of the FeCr metal oxide catalysts in the catalytic ammonia decomposition were investigated by XAFS. It was determined that the Fe metal and FeNx of the bcc structure were the active species of the ammonia-decomposing catalyst. The addition of Cr successfully prevented the Fe from sintering at high temperatures, which is more favorable for the formation of stable metal nitrides, promoting the continuous decomposition of ammonia and improving the decomposition activity of the ammonia. This work reveals the internal relationship between the phase and structural changes and their catalytic activity, identifies the active catalytic phase, thus guiding the design and synthesis of catalysts for ammonia decomposition, and excavates the application value of transition-metal-based nanocomposites in industrial catalysis.
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Affiliation(s)
- Meng Du
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China; (M.D.)
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Lingling Guo
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Hongju Ren
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Gongye Road 523, Fuzhou 350002, China
| | - Xin Tao
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China; (M.D.)
| | - Yunan Li
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China; (M.D.)
| | - Bing Nan
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
| | - Rui Si
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China; (M.D.)
| | - Chongqi Chen
- National Engineering Research Center of Chemical Fertilizer Catalyst, Fuzhou University, Gongye Road 523, Fuzhou 350002, China
| | - Lina Li
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, China; (M.D.)
- Shanghai Synchrotron Radiation Facility, Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
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13
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Zafeiriou I, Gasparatos D, Ioannou D, Katsikini M, Pinakidou F, Paloura EC, Massas I. Se(IV)/Se(VI) adsorption mechanisms on natural and on Ca-modified zeolite for Mediterranean soils amended with the modified zeolite: prospects for agronomic applications. Environ Sci Pollut Res Int 2023; 30:41983-41998. [PMID: 36640241 PMCID: PMC10067652 DOI: 10.1007/s11356-022-24979-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
In the present study, the ability of a modified CaCl2 zeolite (Ca-Z) to both increase Se(IV) availability and restrict Se(VI) mobility in soils is examined. As it was resulted from batch experiments and verified by X-ray absorption fine structure (XAFS) and X-ray fluorescence (XRF) spectroscopies, higher amounts of both Se species adsorbed on Ca-Z compared to natural zeolite (Z-N) forming outer-sphere complexes while the oxidation state did not alter during agitation of samples. Thereafter, Ca-Z was incorporated in six Greek soils, divided into acid and alkaline, at a 20% (w/w) rate and a series of equilibrium batch experiments were performed with soils alone and soils-Ca-Z mixtures to investigate sorption and desorption processes and mechanisms. The acid soils, either treated with Ca-Z or not, adsorbed higher amounts of Se(IV) than alkaline ones, whereas soils alone did not adsorb Se(VI) but impressively high adsorption of Se(VI) occurred in the Ca-Z-treated soils. Desorption of Se(IV) was higher from the Ca-Z-treated soils and especially from the acid soils. Higher distribution coefficients of desorption than the distribution coefficients of sorption were observed, clearly pointing to a hysteresis mechanism. The experimental data fitted with Langmuir and Freundlich isotherms. In the presence of Ca-Z, the Langmuir qm values increased indicating higher Se(IV) retention while Langmuir bL values decreased suggesting lower bonding strength and higher Se(IV) mobility. Overall, treating the soils with Ca-Z increased Se(IV) adsorption and mobility whereas it provided sites for Se(VI) adsorption that did not exist in the studied soils.
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Affiliation(s)
- Ioannis Zafeiriou
- Laboratory of Soil Science and Agricultural Chemistry, Department of Natural Resources Management & Agricultural Engineering, School of Environment & Agricultural Engineering, Agricultural University of Athens, 11855, Athens, Greece
| | - Dionisios Gasparatos
- Laboratory of Soil Science and Agricultural Chemistry, Department of Natural Resources Management & Agricultural Engineering, School of Environment & Agricultural Engineering, Agricultural University of Athens, 11855, Athens, Greece
| | - Dafni Ioannou
- Laboratory of Soil Science and Agricultural Chemistry, Department of Natural Resources Management & Agricultural Engineering, School of Environment & Agricultural Engineering, Agricultural University of Athens, 11855, Athens, Greece
| | - Maria Katsikini
- Department of Physics, Aristotle University of Thessaloniki, GR 54124, Thessaloniki, Greece
| | - Fani Pinakidou
- Department of Physics, Aristotle University of Thessaloniki, GR 54124, Thessaloniki, Greece
| | - Eleni C Paloura
- Department of Physics, Aristotle University of Thessaloniki, GR 54124, Thessaloniki, Greece
| | - Ioannis Massas
- Laboratory of Soil Science and Agricultural Chemistry, Department of Natural Resources Management & Agricultural Engineering, School of Environment & Agricultural Engineering, Agricultural University of Athens, 11855, Athens, Greece.
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14
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Lahiri D, Agrawal R, Chandravanshi K, Rajput P, Agrawal A, Dwivedi A, Makde RD, Jha SN, Garg N. Assessing the prospect of XAFS experiments of metalloproteins under in vivo conditions at Indus-2 synchrotron facility, India. J Synchrotron Radiat 2023; 30:449-456. [PMID: 36891859 PMCID: PMC10000809 DOI: 10.1107/s1600577522011791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Accepted: 12/10/2022] [Indexed: 06/18/2023]
Abstract
The feasibility of X-ray absorption fine-structure (XAFS) experiments of ultra-dilute metalloproteins under in vivo conditions (T = 300 K, pH = 7) at the BL-9 bending-magnet beamline (Indus-2) is reported, using as an example analogous synthetic Zn (0.1 mM) M1dr solution. The (Zn K-edge) XAFS of M1dr solution was measured with a four-element silicon drift detector. The first-shell fit was tested and found to be robust against statistical noise, generating reliable nearest-neighbor bond results. The results are found to be invariant between physiological and non-physiological conditions, which confirms the robust coordination chemistry of Zn with important biological implications. The scope of improving spectral quality for accommodation of higher-shell analysis is addressed.
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Affiliation(s)
- Debdutta Lahiri
- High Pressure and Synchrotron Radiation Physics, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Richa Agrawal
- Department of Biochemistry and Molecular Biology, University of Chicago, 929 E 57th Street, Chicago, IL 60637, USA
| | | | - Parasmani Rajput
- Beamline Development and Application Section, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Ankur Agrawal
- Beamline Development and Application Section, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Ashutosh Dwivedi
- Beamline Development and Application Section, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Ravindra D. Makde
- Beamline Development and Application Section, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - S. N. Jha
- Beamline Development and Application Section, Bhabha Atomic Research Centre, Mumbai 400085, India
| | - Nandini Garg
- High Pressure and Synchrotron Radiation Physics, Bhabha Atomic Research Centre, Mumbai 400085, India
- Homi Bhabha National Institute, Training School Complex, Anushaktinagar, Mumbai 400094, India
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15
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Takemoto K, Murakami M, Tabuchi M, Ohta T. Spectroscopic studies for identifying the chemical states of the periostracum of the Corbicula species in Lake Biwa. J Struct Biol 2023; 215:107944. [PMID: 36841078 DOI: 10.1016/j.jsb.2023.107944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 02/04/2023] [Accepted: 02/13/2023] [Indexed: 02/27/2023]
Abstract
Corbicula clam shells consist of thin periostracum and calcareous layers made of calcium carbonate (CaCO3). Depending on habitat conditions, the shell exhibits various colorations, such as yellow, brown, and black. The chemical state of the periostracum of the Corbicula species in Lake Biwa was studied by X-ray absorption fine structure (XAFS) and Raman scattering spectroscopies. Fe K-edge X-ray absorption near edge structure (XANES) revealed that the Fe3+ intensity increases as the color of the shell changes from yellow to black. Raman spectra suggested that quinone-based polymers cover the yellow shell, and the black shell is further covered by dihydroxyphenylalanine (DOPA) rings of amino acid derivatives. From Fe K-edge extended X-ray absorption fine structure (EXAFS), it was found that Fe3+ in the periostracum was surrounded by five to six oxygen atoms with an average Fe-O ligand distance of 2.0 Å. Accordingly, a tris-DOPA-Fe3+ complex is formed, which is responsible for the periostracum's black color.
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Affiliation(s)
- Kuniko Takemoto
- Department of Physics, Kansai Medical University, 2-5-1 Shin-machi, Hirakata, Osaka 573-1010, Japan.
| | - Masataka Murakami
- Toray Research Center, Inc., 3-3-7, Sonoyama, Otsu, Shiga 520-8567, Japan
| | - Masao Tabuchi
- Synchrotron Radiation Research Center, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8603, Japan
| | - Toshiaki Ohta
- The SR Center, Ritsumeikan University, 1-1-1 Noji-higashi, Kusatsu, Shiga 525-8577, Japan
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16
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Tokunaga K, Tanaka K, Takahashi Y, Kozai N. Improvement of the Stability of IO 3--, SeO 32--, and SeO 42--Coprecipitated Barite after Treatment with Phosphate. Environ Sci Technol 2023; 57:3166-3175. [PMID: 36780547 DOI: 10.1021/acs.est.2c08939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Coprecipitation of radionuclides with barite has been studied to remove radionuclides from radioactive liquid waste because of its excellent removal efficiency; however, little information exists concerning the stability of the ions coprecipitated with barite. This study systematically investigated the stability of iodate, selenite, and selenate coprecipitated with barite via leaching tests. These oxyanions were gradually leached from the oxyanion-bearing barite into ultrapure water over time. Leaching of the oxyanions significantly increased in leaching solutions containing NaCl (pH 5.3), NaNO3 (pH 5.9), and Na2SO4 (pH 5.7). Conversely, leaching of the oxyanions was suppressed in KH2PO4 solution (pH 8.5), indicating that phosphate stabilized the oxyanion-bearing barite. The effect of phosphate treatment on oxyanion-bearing barite was further investigated. The results showed that the barite surface was modified with phosphate, and a thin surface layer of a barium phosphate-like structure was formed. The amount of oxyanions leached from the phosphate-treated samples into leaching solutions containing NaCl or NaNO3 was much lower than the amounts leached from the untreated barite samples into ultrapure water. The barite coprecipitation combined with subsequent phosphate treatment may be a promising method to efficiently remove iodate, selenite, and selenate from wastewater and stabilize them as barite coprecipitates.
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Affiliation(s)
- Kohei Tokunaga
- Ningyo-Toge Environmental Engineering Center, Japan Atomic Energy Agency, Tomata, Okayama 708-0698, Japan
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Kazuya Tanaka
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
| | - Yoshio Takahashi
- Department of Earth and Planetary Science, The University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Naofumi Kozai
- Ningyo-Toge Environmental Engineering Center, Japan Atomic Energy Agency, Tomata, Okayama 708-0698, Japan
- Advanced Science Research Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
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17
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Hong X, Newville M, Ding Y. Local structural investigation of non-crystalline materials at high pressure: the case of GeO 2glass. J Phys Condens Matter 2023; 35:164001. [PMID: 36764002 DOI: 10.1088/1361-648x/acbb4c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 02/10/2023] [Indexed: 06/18/2023]
Abstract
Local structures play a crucial role in the structural polyamorphism and novel electronic properties of amorphous materials, but their accurate measurement at high pressure remains a formidable challenge. In this article, we use the local structure of network-forming GeO2glass as an example, to present our recent approaches and advances in high-energy x-ray diffraction, high-pressure x-ray absorption fine structure, andab initiofirst-principles density functional theory calculations and simulations. Although GeO2glass is one of the best studied materials in the field of high pressure research due to its importance in glass theory and geophysical significance, there are still some long-standing puzzles, such as the existence of appreciable distinct fivefold[5]Ge coordination at low pressure and the sixfold-plus[6+]Ge coordination at ultrahigh pressure. Our work sheds light on the origin of pressure-induced polyamorphism of GeO2glass, and the[5]Ge polyhedral units may be the dominant species in the densification mechanism of network-forming glasses from tetrahedral to octahedral amorphous structures.
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Affiliation(s)
- Xinguo Hong
- Center for High Pressure Science and Technology Advanced Research, Beijing 100193, People's Republic of China
| | - Matt Newville
- Center for Advanced Radiation Sources, University of Chicago, Chicago, IL 60637, United States of America
| | - Yang Ding
- Center for High Pressure Science and Technology Advanced Research, Beijing 100193, People's Republic of China
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Cao D, Xu W, Chen S, Liu C, Sheng B, Song P, Moses OA, Song L, Wei S. Visualizing Catalytic Dynamics Process via Synchrotron Radiation Multi-Techniques. Adv Mater 2023:e2205346. [PMID: 36807321 DOI: 10.1002/adma.202205346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 02/01/2023] [Indexed: 06/18/2023]
Abstract
The importance of catalysts today as workhorses in most modern industrial fields cannot be downplayed. As a result, rational design and engineering of targeted catalysts have emerged as key objectives and are dependent on in-depth understanding of complex catalytic dynamics, such as phase transformation, structural reconstruction, electronic evolution, and differentiation in surface and bulk. The synchrotron radiation (SR) light sources with rich advanced experimental methods are being recognized as a comprehensive characterization platform, which could draw a full picture on such multiparameter-involved catalysis under actual working conditions. Herein, we summarize the recent progress of catalytic dynamics process studied by the means of various SR-techniques. In particular, the SR-based spectroscopic, scattering and imaging investigations on true catalysts are firstly introduced with the potential of in situ and operando characterizations. Apparently, the limitations from single SR-technique naturally prompt a simple combination of SR-techniques to better understand the whole catalysis process. Moreover, the discrepancies among various online testing facilities and batches of samples, along with random/systematic errors introduced by traditional intermittent/asynchronous measurement make it imperative to develop more prolific system, complementary of multiple SR-techniques for deep probing of dynamic catalytic processes from atomic, molecular and electronic levels. We believe that booming new light sources will further enrich the current multiple SR-techniques by offering more synchronous (Femto-microsecond time scale in the same experiment), fine (∼nm spatial resolution and ∼meV energy resolution) and real (actual atmosphere, pressure, temperature, etc.) catalytic conditions, and thus may realize the true visualization on future catalytic dynamic processes. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Dengfeng Cao
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, 230026, China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui, 230031, China
| | - Wenjie Xu
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, 230026, China
| | - Shuangming Chen
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, 230026, China
| | - Chongjing Liu
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, 230026, China
| | - Beibei Sheng
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, 230026, China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui, 230031, China
| | - Pin Song
- Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241000, China
| | - Oyawale Adetunji Moses
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, 230026, China
| | - Li Song
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, 230026, China
- Institute of Energy, Hefei Comprehensive National Science Center, Hefei, Anhui, 230031, China
- Zhejiang Institute of Photonelectronics, Jinhua, Zhejiang, 321004, China
| | - Shiqiang Wei
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, 230026, China
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John MW, Sier D, Ekanayake RSK, Schalken MJ, Tran CQ, Johannessen B, de Jonge MD, Kappen P, Chantler CT. High-accuracy transmission and fluorescence XAFS of zinc at 10 K, 50 K, 100 K and 150 K using the hybrid technique. J Synchrotron Radiat 2023; 30:147-168. [PMID: 36601934 PMCID: PMC9814049 DOI: 10.1107/s1600577522010293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Accepted: 10/24/2022] [Indexed: 06/17/2023]
Abstract
The most accurate measurements of the mass attenuation coefficient for metals at low temperature for the zinc K-edge from 9.5 keV to 11.5 keV at temperatures of 10 K, 50 K, 100 K and 150 K using the hybrid technique are reported. This is the first time transition metal X-ray absorption fine structure (XAFS) has been studied using the hybrid technique and at low temperatures. This is also the first hybrid-like experiment at the Australian Synchrotron. The measured transmission and fluorescence XAFS spectra are compared and benchmarked against each other with detailed systematic analyses. A recent method for modelling self-absorption in fluorescence has been adapted and applied to a solid sample. The XAFS spectra are analysed using eFEFFIT to provide a robust measurement of the evolution of nanostructure, including such properties as net thermal expansion and mean-square relative displacement. This work investigates crystal dynamics, nanostructural evolution and the results of using the Debye and Einstein models to determine atomic positions. Accuracies achieved, when compared with the literature, exceed those achieved by both relative and differential XAFS, and represent a state-of-the-art for future structural investigations. Bond length uncertainties are of the order of 20-40 fm.
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Affiliation(s)
- Marcus W. John
- School of Physics, University of Melbourne, Melbourne, Australia
| | - Daniel Sier
- School of Physics, University of Melbourne, Melbourne, Australia
| | | | | | | | | | | | - Peter Kappen
- Australian Synchrotron, ANSTO, Clayton, Australia
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20
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Drzewiecka-Antonik A, Struga M, Głogowska A, Augustynowicz-Kopec E, Dobrzyńska K, Chrzanowska A, Wolska A, Rejmak P, Klepka MT, Wrzosek M, Bielenica A. Synthesis, Structural Characterization and Biological Activity Evaluation of Novel Cu(II) Complexes with 3-(trifluoromethyl)phenylthiourea Derivatives. Int J Mol Sci 2022; 23:ijms232415694. [PMID: 36555333 PMCID: PMC9779606 DOI: 10.3390/ijms232415694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/05/2022] [Accepted: 12/06/2022] [Indexed: 12/14/2022] Open
Abstract
Copper complexes with 1,3-disubstituted thiourea derivatives, all containing 3-(trifluoromethyl)phenyl tail and 1-alkyl/halogen-phenyl substituent, were synthesized. The experimental spectroscopic studies and theoretical calculation revealed that two ligands coordinate to Cu(II) in a bidentate fashion via thiocarbonyl S and deprotonated N atoms of thiourea moiety. Such monomers are characteristic of alkylphenylthiourea complexes, whereas the formation of a sandwich-type dimer is observed for halogeno derivatives. For the first time, the structural identifications of CuN2S2-based complexes using experimental and theoretical X-ray absorption near edge structure are demonstrated. The dimeric halogeno derivatives showed higher antimicrobial activity in comparison with alkylphenylthiourea complexes. The Cu(II) complex of 1-(4-chloro-3-nitrophenyl)-3-[3-(trifluoromethyl)phenyl]thiourea was active against 19 strains of methicillin-resistant Staphylococci (MIC = 2 µg/mL). This derivative acted as a dual inhibitor of DNA gyrase and topoisomerase IV isolated from Staphylococcus aureus. Additionally, complexes of halogenphenylthiourea strongly inhibited the growth of mycobacteria isolated from tuberculosis patients, even fourfold stronger than the reference isoniazid. The complexes exerted weak to moderate antitumor activity (towards SW480, SW620, and PC3) being non-toxic towards normal HaCaT cells.
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Affiliation(s)
| | - Marta Struga
- Chair and Department of Biochemistry, Medical University of Warsaw, Banacha 1, PL-02097 Warsaw, Poland
| | - Agnieszka Głogowska
- Institute of Tuberculosis and Lung Diseases, Microbiology Department, Plocka 26, PL-01138 Warsaw, Poland
| | - Ewa Augustynowicz-Kopec
- Institute of Tuberculosis and Lung Diseases, Microbiology Department, Plocka 26, PL-01138 Warsaw, Poland
| | - Katarzyna Dobrzyńska
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Warsaw Medical University, 3 Oczki Street, PL-02007 Warsaw, Poland
| | - Alicja Chrzanowska
- Chair and Department of Biochemistry, Medical University of Warsaw, Banacha 1, PL-02097 Warsaw, Poland
| | - Anna Wolska
- Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, PL-02668 Warsaw, Poland
| | - Paweł Rejmak
- Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, PL-02668 Warsaw, Poland
| | - Marcin T. Klepka
- Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, PL-02668 Warsaw, Poland
| | - Małgorzata Wrzosek
- Department of Biochemistry and Pharmacogenomics, Faculty of Pharmacy, Medical University of Warsaw, Banacha 1, PL-02097 Warsaw, Poland
| | - Anna Bielenica
- Chair and Department of Biochemistry, Medical University of Warsaw, Banacha 1, PL-02097 Warsaw, Poland
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Zhou Y, Gu S, Zhao Y, Jiang Z, Zhang Z. A new QE XAFS system on the general XAFS beamline at the Shanghai Synchrotron Radiation Facility. J Synchrotron Radiat 2022; 29:1446-1453. [PMID: 36345753 PMCID: PMC9641573 DOI: 10.1107/s1600577522008177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 08/15/2022] [Indexed: 06/16/2023]
Abstract
A new quick-scanning extended X-ray absorption fine-structure (QEXAFS) system for in situ studies has been developed and tested on the general XAFS beamline at the Shanghai Synchrotron Radiation Facility. In the new system, an analog-to-digital converter (ADC) with 1 MHz sampling rate is used to acquire the detector data while one scaler is used to precisely calculate the scanning energy. Two external hardware trigger signals were adopted to synchronize the data collection of the ADC and the scaler. The software development platforms of the double-crystal monochromator control system and the new QEXAFS system have been unified with the Experimental Physics and Industrial Control System. By comparing the spectra acquired by the conventional step-by-step XAFS system with an energy range of 1200 eV at the 7.5um Cu foil K-edge, the new system demonstrates satisfactory signal-to-noise ratio and energy resolution. The previous shortcomings, including distortion of the spectrum and energy shift, have been overcome. The tests with different integration times indicated that appropriate parameters not only ensure good experimental results but also enhance the smoothness of the XAFS spectrum at high energy zones. The reliability of the new system has also been verified.
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Affiliation(s)
- Yongnian Zhou
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, People’s Republic of China
| | - Songqi Gu
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, People’s Republic of China
| | - Ying Zhao
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, People’s Republic of China
| | - Zheng Jiang
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, People’s Republic of China
| | - Zhaohong Zhang
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, People’s Republic of China
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22
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Gou W, Li W, Siebecker MG, Zhu M, Li L, Sparks DL. Coupling Molecular-Scale Spectroscopy with Stable Isotope Analyses to Investigate the Effect of Si on the Mechanisms of Zn-Al LDH Formation on Al Oxide. Environ Sci Technol 2022; 56:13829-13836. [PMID: 36135962 DOI: 10.1021/acs.est.2c05140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
While silicate has been known to affect metal sorption on mineral surfaces, the mechanisms remain poorly understood. We investigated the effects of silicate on Zn sorption onto Al oxide at pH 7.5 and elucidated the mechanisms using a combination of X-ray absorption fine structure (XAFS) spectroscopy, Zn stable isotope analysis, and scanning transmission electron microscopy (STEM). XAFS analysis revealed that Zn-Al layered double hydroxide (LDH) precipitates were formed in the absence of silicate or at low Si concentrations (≤0.4 mM), whereas the formation of Zn-Al LDH was inhibited at high silicate concentrations (≥0.64 mM) due to surface-induced Si oligomerization. Significant Zn isotope fractionation (Δ66Znsorbed-aqueous = 0.63 ± 0.03‰) was determined at silicate concentrations ≥0.64 mM, larger than that induced by sorption of Zn on Al oxide (0.47 ± 0.03‰) but closer to that caused by Zn bonding to the surface of Si oxides (0.60-0.94‰), suggesting a presence of Zn-Si bonding environment. STEM showed that the sorbed silicates had a close spatial coupling with γ-Al2O3, indicating that >Si-Zn inner-sphere complexes (">" denotes surface) likely bond to the γ-Al2O3 surface to form >Al-Si-Zn ternary inner-sphere complexes. This study not only demonstrates that dissolved silicate in the natural environment plays an important role in the fate and bioavailability of Zn but also highlights the potential of coupled spectroscopic and isotopic methods in probing complex environmental processes.
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Affiliation(s)
- Wenxian Gou
- Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China
- Frontiers Science Center for Critical Earth Material Cycling (FSC-CEMaC), Nanjing University, Nanjing, Jiangsu 210023, China
| | - Wei Li
- Key Laboratory of Surficial Geochemistry, Ministry of Education, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China
- Delaware Institute of Environment, Department of Plant and Soil Sciences, University of Delaware, Newark 19716, United States
- Frontiers Science Center for Critical Earth Material Cycling (FSC-CEMaC), Nanjing University, Nanjing, Jiangsu 210023, China
| | - Matthew G Siebecker
- Department of Plant and Soil Science, Texas Tech University, Lubbock, Texas 79409, United States
| | - Mengqiang Zhu
- Department of Ecosystem Science and Management, University of Wyoming, Laramie, Wyoming 82071, United States
| | - Ling Li
- Delaware Institute of Environment, Department of Plant and Soil Sciences, University of Delaware, Newark 19716, United States
- State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
| | - Donald L Sparks
- Delaware Institute of Environment, Department of Plant and Soil Sciences, University of Delaware, Newark 19716, United States
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Kwon MJ, Boyanov MI, Mishra B, Kemner KM, Jeon SK, Hong JK, Lee S. Zn speciation and fate in soils and sediments along the ground transportation route of Zn ore to a smelter. J Hazard Mater 2022; 438:129422. [PMID: 35785740 DOI: 10.1016/j.jhazmat.2022.129422] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 06/15/2022] [Accepted: 06/17/2022] [Indexed: 06/15/2023]
Abstract
Assessment of Zn toxicity/mobility based on its speciation and transformations in soils is critical for maintaining human and ecosystem health. Zn-concentrate (56 % Zn as ZnS, sphalerite) has been imported through a seaport and transported to a Zn-smelter for several decades, and smelting processes resulted in aerial deposition of Zn and sulfuric acids in two geochemically distinct territories around the smelter (mountain-slope and riverside). XAFS analysis showed that the mountain-slope soils contained franklinite (ZnFe2O4) and amorphous (e.g., sorbed) species of Zn(II), whereas the riverside sediments contained predominantly hydrozincite [Zn5(OH)6(CO3)2], sphalerite, and franklinite. The mountain-slope soils had low pH and moderate levels of total Zn (~ 1514 ppm), whereas the riverside sediments had neutral pH and higher total Zn (12,363 ppm). The absence of sphalerite and the predominance of franklinite in the mountain-slope soils are attributed to the susceptibility of sphalerite and the resistance of franklinite to dissolution at acidic pH. These results are compared to previous Zn analyses along the transportation routes, which showed that Zn-concentrate spilled along the roadside in dust and soils underwent transformation to various O-coordinated Zn species. Overall, Zn-concentrate dispersed in soils and sediments during transportation and smelting transforms into Zn phases of diverse stability and bioavailability during long-term weathering.
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Affiliation(s)
- Man Jae Kwon
- Department of Earth and Environmental Sciences, Korea University, Seoul 02841, the Republic of Korea.
| | - Maxim I Boyanov
- Biosciences Division, Argonne National Laboratory, Argonne, IL 60439, USA; Bulgarian Academy of Sciences, Institute of Chemical Engineering, Sofia 1113, Bulgaria
| | - Bhoopesh Mishra
- Physics Department, Illinois Institute of Technology, Chicago 60616, USA
| | - Kenneth M Kemner
- Biosciences Division, Argonne National Laboratory, Argonne, IL 60439, USA
| | - Soo-Kyung Jeon
- Forensic Toxicology & Chemistry, Daejeon Institute, National Forensic Service, 1524 Youseongdae-ro, Daejeon 34054, the Republic of Korea
| | - Jun Ki Hong
- Department of Earth and Environmental Sciences, Korea University, Seoul 02841, the Republic of Korea
| | - Seunghak Lee
- Water Cycle Research Center, Korea Institute of Science and Technology (KIST), Seoul 02792, the Republic of Korea; Graduate School of Energy and Environment (KU-KIST Green School), Korea University, Seoul 02841, the Republic of Korea.
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24
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Imam NG, Harfouche M, Azab AA, Solyman S. Coupling between γ-irradiation and synchrotron-radiation-based XAFS techniques for studying Mn-doped ZnO nanoparticles. J Synchrotron Radiat 2022; 29:1187-1197. [PMID: 36073877 PMCID: PMC9455205 DOI: 10.1107/s1600577522006439] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2022] [Accepted: 06/21/2022] [Indexed: 06/15/2023]
Abstract
γ-Irradiation and synchrotron-radiation-based X-ray absorption fine-structure (XAFS) spectroscopy have been used to induce structure disorder through the interaction of γ-rays (200 kGy) with fabricated Mn-doped ZnO nanoparticles (NPs) and then to examine thoroughly the resultant structural change. The extracted electronic/fine XAFS structural parameters reflect a compositional and γ-irradiation co-dependence. The average crystal structure of samples prepared by the sol-gel method was investigated by X-ray diffraction (XRD). A detailed structural XRD data analysis was carried out by applying a Rietveld refinement using the MAUD program. XAFS spectra were collected at the Zn K-edge (9659 eV) in transmission mode and at the Mn K-edge (6539 eV) in fluorescence mode. Direct evidence of the solubility of Mn ions in the ZnO structure was demonstrated by fitting the extended-XAFS (EXAFS) signal. Near-edge XAFS (XANES) analysis provided the oxidation states of Zn and Mn ions through fingerprint XANES spectra of the sample along with those of standard compounds. Linear combination fitting showed that the most fit chemical forms of Zn and Mn in the samples are ZnO and MnO, respectively. The oxidation states of both Zn and Mn XAFS absorbers were confirmed from pre-edge fitting. The results of the magnetic measurements were explained in light of the average and electronic/local structural information obtained from XRD, XANES and EXAFS techniques. The magnetic properties of the samples translate into an induced change in the average crystal and electronic/local structures upon Mn concentration change and γ-irradiation. XRD confirmed the successful preparation of hexagonal Mn-doped ZnO NPs with a crystallite size in the range 33-41 nm. Both XRD and EXAFS analysis detected a minor amount of Mn3O4 as a secondary phase. XANES and EXAFS provided information exploring the outstanding potential of the utilized protocol for detecting precisely the presence of the secondary phase of Mn3O4, which changes with Mn content (x). Mean-square relative displacement (σ2) values extracted from the EXAFS fitting were found to grow for Zn-Zn/Mn paths demonstrating the substitution of Mn/Zn into Zn crystal sites. The EXAFS analysis explains the reasons behind the enhancement in the magnetic properties and shows that the Mn doping content at x = 0.05 produces the most local atomic disorder in ZnO NPs. There is a strong harmony among the XRD, XANES, EXAFS and magnetization behavior of the Mn-doped ZnO NPs. Maximum magnetization was acquired at an Mn content of 0.05. γ-Ray-irradiated Zn1-xMnxO NPs are recommended as optimized candidates for showing the diversity of the applications.
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Affiliation(s)
- N. G. Imam
- Experimental Nuclear Physics Department (Solid State Laboratory), Nuclear Research Center (NRC), Egyptian Atomic Energy Authority (EAEA), Cairo 13759, Egypt
| | - Messaoud Harfouche
- Synchrotron-Light for Experimental and Scientific Applications in the Middle East (SESAME), PO Box 7, Allan 19252, Jordan
| | - A. A. Azab
- Solid State Physics Department, Physics Research Institute, National Research Centre, 33 El Bohouth Street, Dokki, 12622 Giza, Egypt
| | - S. Solyman
- Physics Department, Faculty of Science, Zagazig University, Zagazig, Egypt
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25
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Duan L, Wang Q, Li J, Wang F, Yang H, Guo B, Hashimoto Y. Zero valent iron or Fe 3O 4-loaded biochar for remediation of Pb contaminated sandy soil: Sequential extraction, magnetic separation, XAFS and ryegrass growth. Environ Pollut 2022; 308:119702. [PMID: 35787422 DOI: 10.1016/j.envpol.2022.119702] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/09/2022] [Accepted: 06/27/2022] [Indexed: 06/15/2023]
Abstract
In this study, the feasibility of using zero-valent iron (ZVI) and Fe3O4-loaded biochar for Pb immobilization in contaminated sandy soil was investigated. A 180-day incubation study, combined with dry magnetic separation, chemical extraction, mineralogical characterization, and model plant (ryegrass, namely the Lilium perenne L.) growth experiment was conducted to verify the performance of these two materials. The results showed that both amendments significantly transferred the available Pb (the exchangeable and carbonates fraction) into more stable fractions (mainly Fe/Mn oxides-bound Pb), and ZVI alone showed a better performance than the magnetic biochar alone. The magnetic separation and extended X-ray absorption fine structure (EXAFS) analysis proved that Fe (oxyhydr)oxides on aged ZVI particles were the major scavengers of Pb in ZVI-amended soils. In comparison, the reduced Pb availability in magnetic biochar-amended soil could be explained by the association of Pb with Fe/Mn (oxyhydr)oxides in aged magnetic biochar, also the possible precipitation of soil Pb with soluble anions (e.g. OH-, PO43-, and SO42-) released from magnetic biochar. ZVI increased ryegrass production while Fe3O4-loaded biochar had a negative effect on the ryegrass growth. Moreover, both markedly decreased the Pb accumulation in aboveground and root tissues. The simple dry magnetic separation presents opportunities for the removal of Pb from soils, even though the efficiencies were not high (17.5% and 12.9% of total Pb from ZVI and biochar-treated soils, respectively). However, it should be noted that the ageing process easily result in the loss of magnetism of ZVI while the magnetic biochar tends to be more stable and has high retrievability during the dry magnetic separation application.
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Affiliation(s)
- Lunchao Duan
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu, 210023, China; Jiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response Technology, Nanjing, Jiangsu, 210023, China; Jiangsu Province Science and Technology Resources Coordination and Service Center, Nanjing, Jiangsu, 210000, China
| | - Qianhui Wang
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu, 210023, China; Jiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response Technology, Nanjing, Jiangsu, 210023, China
| | - Jining Li
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu, 210023, China; Jiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response Technology, Nanjing, Jiangsu, 210023, China.
| | - Fenghe Wang
- School of Environment, Nanjing Normal University, Nanjing, Jiangsu, 210023, China; Jiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response Technology, Nanjing, Jiangsu, 210023, China
| | - Hao Yang
- School of Geography, Nanjing Normal University, Nanjing, Jiangsu, 210023, China
| | - Binglin Guo
- Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, 519082, Zhuhai, China
| | - Yohey Hashimoto
- Department of Bioapplications and Systems Engineering (BASE), Tokyo University of Agriculture and Technology, Koganei, Tokyo, 184-8588, Japan
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26
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Telang P, Bandyopadhyay A, Mishra K, Rout D, Bag R, Gloskovskii A, Matveyev Y, Singh S. X-ray photoemission and absorption study of the pyrochlore iridates (Eu1-xBi x) 2Ir 2O 7, 0 ⩽ x ⩽ 1. J Phys Condens Matter 2022; 34:395601. [PMID: 35817027 DOI: 10.1088/1361-648x/ac8038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 07/11/2022] [Indexed: 06/15/2023]
Abstract
The pyrochlore iridates (Eu1-xBix)2Ir2O7(0⩽x⩽1) undergo an anomalous negative lattice expansion for small Bi-doping (x⩽0.035) (region I) and a normal lattice expansion forx⩾0.1(region II); this is accompanied by a transition from an insulating (and magnetically ordered) to a metallic (and with no magnetic ordering) ground state. Here, we investigate (Eu1-xBix)2Ir2O7(0⩽x⩽1) using hard x-ray photoemission spectroscopy and x-ray absorption fine structure (XAFS) spectroscopy. By analyzing the Eu-L3, Ir-L3and Bi-L2&L3edges x-ray absorption near edge structure spectra and Eu-3dcore-level XPS spectra, we show that the metal cations retain their nominal valence, namely, Ir4+, Bi3+and Eu3+, respectively, throughout the series. The Ir-4fand Bi-4fcore-level XPS spectra consist of screened and unscreened doublets. The unscreened component is dominant In the insulating range (x⩽0.035), and in the metallic region (x⩾0.1), the screened component dominates the spectra. The Eu-3dcore-level spectra remain invariant under Bi doping. The extended XAFS data show that the coordination around the Ir remains well preserved throughout the series. The evolution of the valence band spectra near the Fermi energy with increasing Bi doping indicates the presence of strong Ir(5d)-Bi(6p) hybridization which drives the metal-to-insulator transition.
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Affiliation(s)
- Prachi Telang
- Department of Physics, Indian Institute of Science Education and Research, Pune, Maharashtra 411008, India
| | - Abhisek Bandyopadhyay
- Department of Physics, Indian Institute of Science Education and Research, Pune, Maharashtra 411008, India
| | - Kshiti Mishra
- Department of Physics, Indian Institute of Science Education and Research, Pune, Maharashtra 411008, India
| | - Dibyata Rout
- Department of Physics, Indian Institute of Science Education and Research, Pune, Maharashtra 411008, India
| | - Rabindranath Bag
- Department of Physics, Indian Institute of Science Education and Research, Pune, Maharashtra 411008, India
| | - A Gloskovskii
- Photon Science, Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Yu Matveyev
- Photon Science, Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany
| | - Surjeet Singh
- Department of Physics, Indian Institute of Science Education and Research, Pune, Maharashtra 411008, India
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27
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Harfouche M, Abdellatief M, Momani Y, Abbadi A, Al Najdawi M, Al Zoubi M, Aljamal B, Matalgah S, Khan LU, Lausi A, Paolucci G. Emergence of the first XAFS/XRF beamline in the Middle East: providing studies of elements and their atomic/electronic structure in pluridisciplinary research fields. J Synchrotron Radiat 2022; 29:1107-1113. [PMID: 35787578 PMCID: PMC9255566 DOI: 10.1107/s1600577522005215] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 05/14/2022] [Indexed: 06/15/2023]
Abstract
XAFS/XRF is a general-purpose absorption spectroscopy beamline at the Synchrotron-light for Experimental Science and Applications in the Middle East (SESAME), Jordan. Herein, its optical layout is presented along with its powerful capabilities in collecting absorption and fluorescence spectra within a wide energy range (4.7-30 keV). The beamline is equipped with a conventional fixed-exit double-crystal monochromator that allows the collection of an X-ray absorption spectrum within a few minutes in step-by-step mode. An on-the-fly scanning mode will be implemented shortly where the acquisition time will be reduced to less than a minute per scan. The full automation of the beamline allows performing successive measurements under different conditions. The different experimental setups and special features available to users are reported. Examples of XRF and XAFS measurements are presented, showing the performance of the beamline under different standard conditions.
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Affiliation(s)
- Messaoud Harfouche
- SESAME (Synchrotron-light for Experimental Science and Applications in the Middle East), Allan 19252, Jordan
| | - Mahmoud Abdellatief
- SESAME (Synchrotron-light for Experimental Science and Applications in the Middle East), Allan 19252, Jordan
| | - Yazeed Momani
- SESAME (Synchrotron-light for Experimental Science and Applications in the Middle East), Allan 19252, Jordan
| | - Anas Abbadi
- SESAME (Synchrotron-light for Experimental Science and Applications in the Middle East), Allan 19252, Jordan
| | - Mohammad Al Najdawi
- SESAME (Synchrotron-light for Experimental Science and Applications in the Middle East), Allan 19252, Jordan
| | - Mustafa Al Zoubi
- SESAME (Synchrotron-light for Experimental Science and Applications in the Middle East), Allan 19252, Jordan
| | - Basil Aljamal
- SESAME (Synchrotron-light for Experimental Science and Applications in the Middle East), Allan 19252, Jordan
| | - Salman Matalgah
- SESAME (Synchrotron-light for Experimental Science and Applications in the Middle East), Allan 19252, Jordan
| | - Latif U. Khan
- SESAME (Synchrotron-light for Experimental Science and Applications in the Middle East), Allan 19252, Jordan
| | - Andrea Lausi
- SESAME (Synchrotron-light for Experimental Science and Applications in the Middle East), Allan 19252, Jordan
- Elettra-Sincrotrone Trieste SCpA, Strada Statale 14 – km 163,5 in AREA Science Park, Basovizza/Trieste 34149, Italy
| | - Giorgio Paolucci
- Elettra-Sincrotrone Trieste SCpA, Strada Statale 14 – km 163,5 in AREA Science Park, Basovizza/Trieste 34149, Italy
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28
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Minoda A, Miyashita SI, Fujii SI, Inagaki K, Takahashi Y. Cell population behavior of the unicellular red alga Galdieria sulphuraria during precious metal biosorption. J Hazard Mater 2022; 432:128576. [PMID: 35313161 DOI: 10.1016/j.jhazmat.2022.128576] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 02/18/2022] [Accepted: 02/23/2022] [Indexed: 06/14/2023]
Abstract
This study investigates the biosorption mechanism, including cell population behavior, of trace amounts of precious metals (gold, palladium, and platinum) in a unicellular red alga, Galdieria sulphuraria. Single-cell inductively coupled plasma mass spectrometry showed that the number of adsorbing cells and the concentration of adsorbed metal per cell varied depending on solution acidity and metal species. The X-ray absorption fine structure in 5 mM HCl solution indicated that the adsorbed Au formed inner-sphere complexes with S, whereas the adsorbed Pd and Pt formed an inner-sphere complexes with N and/or S. In 500 mM HCl solution, the adsorbed Au and Pd formed inner-sphere complexes only with S, and the Au formed a structure similar to Au2S. At higher acidity, Au and Pd were recovered by interacting with residues that formed more stable complexes, which was accompanied by changes in the behavior of cell populations adsorbing the metals. This is the first study to demonstrate the relationship between changes in the behavior of cell populations and chemical interactions that occur between substrate elements and biomaterial residues during biosorption. The findings of this study provide deeper insights into the biosorption mechanism and a background for the design of an environmentally friendly biosorbent.
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Affiliation(s)
- Ayumi Minoda
- Faculty of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaragi 305-8572, Japan.
| | - Shin-Ichi Miyashita
- National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 3, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan.
| | - Shin-Ichiro Fujii
- National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 3, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan.
| | - Kazumi Inagaki
- National Metrology Institute of Japan (NMIJ), National Institute of Advanced Industrial Science and Technology (AIST), AIST Tsukuba Central 3, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8563, Japan.
| | - Yoshio Takahashi
- Department of Earth and Planetary Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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Zhao S, Zhou W, Xiang X, Cao X, Chen N, Chen W, Yu X, Yan B, Gou H. Structure Determination, Mechanical Properties, Thermal Stability of Co 2MoB 4 and Fe 2MoB 4. Materials (Basel) 2022; 15:ma15093031. [PMID: 35591366 PMCID: PMC9102238 DOI: 10.3390/ma15093031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/13/2022] [Accepted: 04/20/2022] [Indexed: 02/05/2023]
Abstract
The precise determination of atomic position of materials is critical for understanding the relationship between structure and properties, especially for compounds with light elements of boron and single or multiple transition metals. In this work, the single crystal X-ray diffraction is employed to analyze the atomic positions of Co2MoB4 and Fe2MoB4 with a Ta3B4-type structure, and it is found that the lengths of B-B bonds connecting the two zig-zag boron chains are 1.86 Å and 1.87 Å, but previously unreported 1.4 Å. Co and Fe atoms occupy the same crystallographic position in lattice for the doped samples and the valence is close to the metal itself, and Co/Fe K-edge X-ray Absorption Fine Structure(XAFS) spectra of borides with different ratios of Co to Fe are collected to detect the local environment and chemical valence of Co and Fe. Vickers hardness and nano indentation measurements are performed, together with the Density Functional Theory (DFT) calculations. Finally, Co2MoB4 possess better thermal stability than Fe2MoB4 evaluated by Thermogravimetric Differential Thermal Analysis (TG-DTA) results.
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Affiliation(s)
- Shijing Zhao
- Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China; (S.Z.); (W.Z.); (X.C.)
| | - Wenju Zhou
- Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China; (S.Z.); (W.Z.); (X.C.)
| | - Xiaojun Xiang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (X.X.); (X.Y.)
| | - Xuyan Cao
- Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China; (S.Z.); (W.Z.); (X.C.)
| | - Ning Chen
- Canadian Light Source, Saskatoon, SK S7N 2V3, Canada; (N.C.); (W.C.)
| | - Weifeng Chen
- Canadian Light Source, Saskatoon, SK S7N 2V3, Canada; (N.C.); (W.C.)
| | - Xiaohui Yu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China; (X.X.); (X.Y.)
| | - Bingmin Yan
- Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China; (S.Z.); (W.Z.); (X.C.)
- Correspondence: (B.Y.); (H.G.)
| | - Huiyang Gou
- Center for High Pressure Science and Technology Advanced Research, Beijing 100094, China; (S.Z.); (W.Z.); (X.C.)
- Correspondence: (B.Y.); (H.G.)
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Cheng C, Ding M, Yan T, Jiang J, Mao J, Feng X, Chan TS, Li N, Zhang L. Anionic Redox Activities Boosted by Aluminum Doping in Layered Sodium-Ion Battery Electrode. Small Methods 2022; 6:e2101524. [PMID: 35084117 DOI: 10.1002/smtd.202101524] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/09/2022] [Indexed: 06/14/2023]
Abstract
Sodium-ion batteries (SIBs) have attracted widespread attention for large-scale energy storage, but one major drawback, i.e., the limited capacity of cathode materials, impedes their practical applications. Oxygen redox reactions in layered oxide cathodes are proven to contribute additionally high specific capacity, while such cathodes often suffer from irreversible structural transitions, causing serious capacity fading and voltage decay upon cycling, and the formation process of the oxidized oxygen species remains elusive. Herein, a series of Al-doped P2-type Na0.6 Ni0.3 Mn0.7 O2 cathode materials for SIBs are reported and the corresponding charge compensation mechanisms are investigated qualitatively and quantitatively. The combined analyses reveal that Al doping boosts the reversible oxygen redox reactions through the reductive coupling reactions between orphaned O 2p states in NaOAl local configurations and Ni4+ ions, as directly evidenced by X-ray absorption fine structure results. Additionally, Al doping also induces an increased interlayer spacing and inhibits the unfavorable P2 to O2 phase transition upon desodiation/sodiation, which is common in P2-type Mn-based cathode materials, leading to the great improvement in capacity retention and rate capability. This work provides deeper insights into the development of structurally stable and high-capacity layered cathode materials for SIBs with anion-cation synergetic contributions.
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Affiliation(s)
- Chen Cheng
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China
| | - Manling Ding
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China
| | - Tianran Yan
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China
| | - Jinsen Jiang
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China
| | - Jing Mao
- School of Materials Science and Engineering, Zhengzhou University, Zhengzhou, 450001, China
| | - Xuefei Feng
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, 230026, China
| | - Ting-Shan Chan
- National Synchrotron Radiation Research Center, Hsinchu, 30076, Taiwan
| | - Ning Li
- Beijing Institute of Technology Chongqing Innovation Center, Chongqing, 401120, China
- Beijing Key Laboratory of Environmental Science and Engineering, School of Material Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China
| | - Liang Zhang
- Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China
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Komagata S, Itou Y, Kondo H. Impact of Surface Layer Formation during Cycling on the Thermal Stability of the LiNi 0.8Co 0.1Mn 0.1O 2 Cathode. ACS Appl Mater Interfaces 2022; 14:8931-8937. [PMID: 35164500 DOI: 10.1021/acsami.1c20643] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
In this study, the effects of charge/discharge cycling on the thermal stability of LiNi0.8Co0.1Mn0.1O2, a high-Ni cathode material, are systematically investigated. X-ray diffraction measurements show that there is almost no change in the bulk structure of the cathode after cycling. However, X-ray absorption fine structure measurements indicate that Ni in the surface layer is reduced and stable rock-salt structures are formed. Differential scanning calorimetry (DSC) measurements show that the heat generation at the lowest temperature, which can trigger thermal runaway in batteries that use high-Ni cathodes, decreases significantly with the formation of rock-salt structures on the active material surface. This finding indicates that the rock-salt layer on the surface enhances the thermal stability of a high-Ni cathode. The change in the total heat generation with degradation, indicated by DSC measurements, is similar to that in the K-edge of Ni (i.e., the Ni valency), suggesting a strong correlation between the heat generation and crystal structure changes during cycling.
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Affiliation(s)
- Shogo Komagata
- Toyota Central R&D Labs. Inc., 41-1 Yokomichi, Nagakute, Aichi 480-1192, Japan
| | - Yuichi Itou
- Toyota Central R&D Labs. Inc., 41-1 Yokomichi, Nagakute, Aichi 480-1192, Japan
| | - Hiroki Kondo
- Toyota Central R&D Labs. Inc., 41-1 Yokomichi, Nagakute, Aichi 480-1192, Japan
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Zhu S, Wang C, Shou H, Zhang P, Wan P, Guo X, Yu Z, Wang W, Chen S, Chu W, Song L. In Situ Architecting Endogenous Heterojunction of MoS 2 Coupling with Mo 2 CT x MXenes for Optimized Li + Storage. Adv Mater 2022; 34:e2108809. [PMID: 34784438 DOI: 10.1002/adma.202108809] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Indexed: 06/13/2023]
Abstract
Endogenous heterojunction of 2D MXenes with unique structure shows inspiring potential in energy applications, which is impeded by complex synthesis method and finite MAX materials. Herein, an in situ hydrothermal strategy is implemented to successfully synthesize unique endogenous hetero-MXenes of amorphous MoS2 coupling with fluoride-free Mo2 CTx (hetero-Mo2 C) directly from Mo2 Ga2 C MAX. The distinctive morphology and heterojunction structure caused by the introduction of MoS2 endow the hetero-MXenes with extraordinary structural stability and optimized Li+ storage mechanism with improved charge transport and lithium ion adsorption capabilities. As a result, hetero-Mo2 C exhibits excellent electrochemical performance with a high discharge specific capacity of 1242 mAh g-1 at 0.1 A g-1 and long cycle stability of 683.9 mAh g-1 after 1200 cycling. This work provides new insights into rational design of novel MXenes heterojunctions, practically important for the development of MXenes and their applications in high-performance energy storage systems.
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Affiliation(s)
- Shuang Zhu
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Changda Wang
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Hongwei Shou
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Pengjun Zhang
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Ping Wan
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Xin Guo
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Zhen Yu
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Wenjie Wang
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Shuangming Chen
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Wangsheng Chu
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Li Song
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
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Peng MW, Qi J, Yan P, Guan Y, Liu YY, Sun ZH, Zhang LJ, Weng X, Shen Y, Fang F, Guo JS, Chen YP. Insight into the structure and metabolic function of iron-rich nanoparticles in anammox bacteria. Sci Total Environ 2022; 806:150879. [PMID: 34627893 DOI: 10.1016/j.scitotenv.2021.150879] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 10/03/2021] [Accepted: 10/04/2021] [Indexed: 06/13/2023]
Abstract
Anaerobic ammonium-oxidizing (anammox) bacteria are iron abundant and depend heavily on iron-binding proteins. The iron demand of anammox bacteria is relatively large. However, it still remains some doubts where these large quantities of available iron come from and how they are regulated in anammox bacteria. Herein, iron-rich nanoparticles in anammoxosomes were detected by synchrotron soft X-ray tomography coupled with scanning transmission X-ray microscopy (STXM). The iron-rich nanoparticles were identified as ferric oxide (α-Fe2O3) mineral cores, and the local atomic structure of iron-rich nanoparticles was obtained by X-ray absorption fine-structure (XAFS) spectra. The bacterioferritin of Q1Q315 and Q1Q5F8 were detected by proteomics analysis. On this basis, the metabolic pathway centered on iron-rich nanoparticles was proposed.
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Affiliation(s)
- Meng-Wen Peng
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments of MOE, Chongqing University, Chongqing 400045, China; China Three Gorges Corporation, Beijing 100038, China
| | - Jing Qi
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments of MOE, Chongqing University, Chongqing 400045, China
| | - Peng Yan
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments of MOE, Chongqing University, Chongqing 400045, China
| | - Yong Guan
- National Synchrotron Radiation Laboratory, University of Science & Technology of China, Hefei 230026, China
| | - Ying-Ying Liu
- Department of Earth and Environmental Sciences, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada
| | - Zhi-Hu Sun
- National Synchrotron Radiation Laboratory, University of Science & Technology of China, Hefei 230026, China
| | - Li-Juan Zhang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
| | - Xun Weng
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments of MOE, Chongqing University, Chongqing 400045, China
| | - Yu Shen
- National Base of International Science and Technology Cooperation for Intelligent Manufacturing Service, Chongqing Technology and Business University, Chongqing 400067, China
| | - Fang Fang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments of MOE, Chongqing University, Chongqing 400045, China
| | - Jin-Song Guo
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments of MOE, Chongqing University, Chongqing 400045, China
| | - You-Peng Chen
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environments of MOE, Chongqing University, Chongqing 400045, China.
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Seddon-Ferretti ME, Mottram LM, Stennett MC, Corkhill CL, Hyatt NC. HERMES - a GUI-based software tool for pre-processing of X-ray absorption spectroscopy data from laboratory Rowland circle spectrometers. J Synchrotron Radiat 2022; 29:276-279. [PMID: 34985445 PMCID: PMC8733975 DOI: 10.1107/s1600577521012583] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 11/25/2021] [Indexed: 06/14/2023]
Abstract
HERMES, a graphical user interface software tool, is presented, for pre-processing X-ray absorption spectroscopy (XAS) data from laboratory Rowland circle spectrometers, to meet the data handling needs of a growing community of practice. HERMES enables laboratory XAS data to be displayed for quality assessment, merging of data sets, polynomial fitting of smoothly varying data, and correction of data to the true energy scale and for dead-time and leakage effects. The software is written in Java 15 programming language, and runs on major computer operating systems, with graphics implementation using the JFreeChart toolkit. HERMES is freely available and distributed under an open source licence.
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Affiliation(s)
- Marco E. Seddon-Ferretti
- Department of Materials Science and Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, United Kingdom
- Department of Computer Science, University of Sheffield, Regent Court, Sheffield S1 4DP, United Kingdom
| | - Lucy M. Mottram
- Department of Materials Science and Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, United Kingdom
| | - Martin C. Stennett
- Department of Materials Science and Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, United Kingdom
| | - Claire L. Corkhill
- Department of Materials Science and Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, United Kingdom
| | - Neil C. Hyatt
- Department of Materials Science and Engineering, University of Sheffield, Mappin Street, Sheffield S1 3JD, United Kingdom
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Zhang P, Wang C, Wei S, Shou H, Zhu K, Cao Y, Xu W, Guo X, Wu X, Chen S, Song L. 3D V 2CT x-rGO Architectures with Optimized Ion Transport Channels toward Fast Lithium-Ion Storage. ACS Appl Mater Interfaces 2021; 13:61258-61266. [PMID: 34913669 DOI: 10.1021/acsami.1c19596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Two-dimensional (2D) MXene materials show great potential in energy storage devices. However, the self-restacking of MXene nanosheets and the sluggish lithium-ion (Li+) kinetics greatly hinder their rate capability and cycling stability. Herein, we interlink 2D V2CTx MXene nanosheets with rGO to construct a 3D porous V2CTx-rGO composite. X-ray spectroscopy study reveals the close interfacial contact between V2CTx and rGO via electron transfer from V to C atoms. Benefiting from the close combination and optimized ion transport channel, V2CTx-rGO offers a high-rate Li+ storage performance and excellent cycling stability over 2000 cycles with negligible capacity attenuation. Moreover, it exhibits a dominant mechanism of intercalation pseudocapacitance and efficient Li+ transport proved by density functional theory calculation. This rationally designed 3D V2CTx-rGO has implications for the study of the MXene composite's structure and energy storage devices with high rate and stability.
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Affiliation(s)
- Pengjun Zhang
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Changda Wang
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Shiqiang Wei
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Hongwei Shou
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
- School of Chemistry and Material Sciences, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Kefu Zhu
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Yuyang Cao
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Wenjie Xu
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Xin Guo
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Xiaojun Wu
- School of Chemistry and Material Sciences, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Shuangming Chen
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
| | - Li Song
- National Synchrotron Radiation Laboratory, CAS Center for Excellence in Nanoscience, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China
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Li H, Gong Y, Guo Z, Dong Z, Liao J, Tao Q, Dong J, Chen D. Unusual suppression of tungsten 5 delectron depletion in superhard tungsten tetraboride solid solution with chromium under compression. J Phys Condens Matter 2021; 34:035401. [PMID: 34607315 DOI: 10.1088/1361-648x/ac2caa] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 10/04/2021] [Indexed: 06/13/2023]
Abstract
The lattice compressibility and deformation in superhard tungsten tetraboride (WB4) solid solution with chromium (Cr) are investigated by high-pressure x-ray diffraction and x-ray absorption fine structure (XAFS) spectroscopy up to 54 GPa. In contrast to pure WB4, thec-axis softening is effectively suppressed in W0.9Cr0.1B4, and less compressibility is shown for thea- andc-axes in the entire pressure range. Meanwhile, the white-line peak of W L3-edge XAFS in W0.9Cr0.1B4shows an absence of the sudden intensity drop as previously observed in WB4at ∼21 GPa, suggesting a strong inhibition of W 5delectron depletion. This phenomenon is followed by an initial increase and then decrease for the W-B bond disorder, with the magnitude greatly lower than that of WB4. Besides the apparent atomic size mismatch effect, these results imply that addition of Cr, which has the same number of valence electrons as W, can introduce an unexpected electronic structure change to strengthen the W-B bond via a modification of W vacancies and B trimers distribution in WB4lattice. Our findings point out the great significance to precise manipulation of the intrinsic W vacancies and B trimers through different solute atoms to rational optimization of WB4hardness.
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Affiliation(s)
- Haijing Li
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Yu Gong
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Zhiying Guo
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Zheng Dong
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jiangwen Liao
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Qiang Tao
- State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, People's Republic of China
| | - Juncai Dong
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Dongliang Chen
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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Hao X, Guo Z, Li H, Gong Y, Chen D. Anomalous enhancement of atomic vibration induced by electronic transition in 2H-MoTe 2under compression. J Phys Condens Matter 2021; 34:025402. [PMID: 34584018 DOI: 10.1088/1361-648x/ac2ad1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 09/28/2021] [Indexed: 06/13/2023]
Abstract
In this work, we explore the atomic vibration and local structure in 2H-MoTe2by using high-pressure x-ray absorption fine structure spectroscopy up to ∼20 GPa. The discrepancy between the Mo-Te and Mo-Mo bond length in 2H-MoTe2obtained from extended-XAFS and other techniques shows abnormal increase at 7.3 and 14.8 GPa, which is mainly due to the abrupt enhancement of vibration perpendicular to the bond direction.Ab initiocalculations are performed to study the electronic structure of 2H-MoTe2up to 20 GPa and confirm a semiconductor to semimetal transition around 8 GPa and a Lifshitz transition around 14 GPa. We attribute the anomalous enhancement of vibration perpendicular to the bond direction to electronic transitions. We find the electronic transition induced enhancement of local vibration for the first time. Our finding offers a novel insight into the local atomic vibration and provides a new platform for understanding the relationship between the electronic transition and atomic vibration.
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Affiliation(s)
- Xingyu Hao
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Zhiying Guo
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Haijing Li
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Yu Gong
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Dongliang Chen
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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Johnson MG, Luxton TP, Rygiewicz PT, Reichman JR, Bollman MA, King GA, Storm MJ, Nash MS, Andersen CP. Transformation and release of micronized Cu used as a wood preservative in treated wood in wetland soil. Environ Pollut 2021; 287:117189. [PMID: 34023660 PMCID: PMC9299944 DOI: 10.1016/j.envpol.2021.117189] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 04/08/2021] [Accepted: 04/16/2021] [Indexed: 06/12/2023]
Abstract
Micronized Cu (μ-Cu) is used as a wood preservative, replacing toxic chromated copper arsenate (CCA). Micronized Cu is malachite [Cu2CO3(OH)2] that has been milled to micron/submicron particles, with many particle diameters less than 100 nm, mixed with biocides and then used to treat wood. In addition to concerns about the fate of the Cu from μ-Cu, there is interest in the fate of the nano-Cu (n-Cu) constituents. We examined movement of Cu from μ-Cu-treated wood after placing treated-wood stakes into model wetland ecosystems. Release of Cu into surface and subsurface water was monitored. Surface water Cu reached maximum levels 3 days after stake installation and remained elevated if the systems remained inundated. Subsurface water Cu levels were 10% of surface water levels at day 3 and increased gradually thereafter. Sequential filtering indicated that a large portion of the Cu in solution was associating with soluble organics, but there was no evidence for n-Cu in solution. After 4 months, Cu in thin-sections of treated wood and adjacent soil were characterized with micro X-ray absorption fine structure spectroscopy (μ-XAFS). Localization and speciation of Cu in the wood and adjacent soil using μ-XAFS clearly indicated that Cu concentrations decreased over time in the treated wood and increased in the adjacent soil. However, n-Cu from the treated wood was not found in the adjacent soil or plant roots. The results of this study indicate that Cu in the μ-Cu-treated wood dissolves and migrates into adjacent soil and waters primarily in ionic form (i.e., Cu2+) and not as nano-sized Cu particles. A reduced form of Cu (Cu2S) was identified in deep soil proximal to the treated wood, indicating strong reducing conditions. The formation of the insoluble Cu2S effectively removes some portion of dissolved Cu from solution, reducing movement of Cu2+ to the water column and diminishing exposure.
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Affiliation(s)
- M G Johnson
- EPA, ORD, Center for Public Health and Environmental Assessment, Corvallis, OR, USA.
| | - T P Luxton
- EPA, ORD, Center for Environmental Solutions and Emergency Response, Cincinnati, OH, USA
| | - P T Rygiewicz
- EPA, ORD, Center for Public Health and Environmental Assessment, Corvallis, OR, USA
| | - J R Reichman
- EPA, ORD, Center for Public Health and Environmental Assessment, Corvallis, OR, USA
| | - M A Bollman
- EPA, ORD, Center for Public Health and Environmental Assessment, Corvallis, OR, USA
| | | | | | - M S Nash
- EPA, ORD, Center for Public Health and Environmental Assessment, Corvallis, OR, USA
| | - C P Andersen
- EPA, ORD, Center for Public Health and Environmental Assessment, Corvallis, OR, USA
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Sun X, Zhang X, Li Y, Xu Y, Su H, Che W, He J, Zhang H, Liu M, Zhou W, Cheng W, Liu Q. In Situ Construction of Flexible VNi Redox Centers over Ni-Based MOF Nanosheet Arrays for Electrochemical Water Oxidation. Small Methods 2021; 5:e2100573. [PMID: 34927938 DOI: 10.1002/smtd.202100573] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Revised: 08/24/2021] [Indexed: 06/14/2023]
Abstract
Atomic-level design and construction of synergistic active centers are central to develop advanced oxygen electrocatalysts toward efficient energy conversion. Herein, an in situ construction strategy to introduce flexible redox sites of VNi centers onto Ni-based metal-organic framework (MOF) nanosheet arrays (NiV-MOF NAs) as a promising oxygen electrocatalyst is developed. The abundant redox VNi centers with flexible metal valence states of V+3/+4/+5 and Ni+3/+2 enable NiV-MOF NAs excellent oxygen evolution reaction (OER) activity and a long-term stability under high current densities, achieving current densities of 10 and 100 mA cm-2 at recorded overpotentials of 189 and 290 mV, respectively, and showing ignorable decay of initial activity at 100 mA cm-2 after 100 h OER operation. Operando synchrotron radiation Fourier transform infrared combined with quasi in situ X-ray absorption fine structure spectroscopies reveal at atomic level that the flexible V sites can continuously accept electrons from adjacent active Ni sites to accelerate OER kinetics for NiV-MOF NAs during the reaction process, accompanied by a self-optimized structural distortion of VO6 octahedron for promoting the electrochemical stability.
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Affiliation(s)
- Xuan Sun
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Xiuxiu Zhang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Yuanli Li
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
- Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory, Southwest University of Science and Technology, Mianyang, Sichuan, 621010, P. R. China
| | - Yanzhi Xu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Hui Su
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Wei Che
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Jingfu He
- School of Materials, Sun Yat-sen University, Guangzhou, Guangdong, 510275, P. R. China
| | - Hui Zhang
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Meihuan Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Wanlin Zhou
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Weiren Cheng
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
| | - Qinghua Liu
- National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei, Anhui, 230029, P. R. China
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Olagunju MO, Liu Y, Frenkel AI, Knecht MR. Atomically Resolved Characterization of Optically Driven Ligand Reconfiguration on Nanoparticle Catalyst Surfaces. ACS Appl Mater Interfaces 2021; 13:44302-44311. [PMID: 34499467 DOI: 10.1021/acsami.1c11256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Dynamic ligand layers on nanoparticle surfaces could prove to be critically important to enhance the functionality of individual materials. Such capabilities could complement the properties of the inorganic component to provide multifunctionality or the ability to be remotely actuated. Peptide-based ligands have demonstrated the ability to be remotely responsive to structural changes when adsorbed to nanoparticle surfaces via incorporation of photoswitches into their molecular structure. In this contribution, direct spectroscopic evidence of the remote actuation of a photoswitchable peptide adsorbed onto Au nanoparticles is demonstrated using X-ray absorption fine structure spectroscopic methods. From this analysis, Au-X (X = C or N) coordination numbers confirm the changes before and after photoswitching in the surface ligand conformation, which was correlated directly to variations in the catalytic application of the materials for nitrophenol reduction processes. In addition, the catalytic application of the materials was demonstrated to be significantly sensitive to the structure of the nitrophenol substrate used in the reaction, suggesting that changes in the reactivity are likely based upon the peptide conformation and substrate structure. Such results confirm that surface ligands can be remotely reconfigured on nanoparticle surfaces, providing pathways to apply such capabilities to a variety of applications beyond catalysis ranging from drug delivery to sensing.
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Affiliation(s)
- Mary O Olagunju
- Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146, United States
| | - Yang Liu
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Anatoly I Frenkel
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Marc R Knecht
- Department of Chemistry, University of Miami, 1301 Memorial Drive, Coral Gables, Florida 33146, United States
- Dr. J. T. Macdonald Foundation Biomedical Nanotechnology Institute, University of Miami, UM Life Science Technology Building, 1951 NW 7th Avenue, Suite 475, Miami, Florida 33136, United States
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Terrill NJ, Dent AJ, Dobson B, Beale AM, Allen L, Bras W. Past, present and future-sample environments for materials research studies in scattering and spectroscopy; a UK perspective. J Phys Condens Matter 2021; 33:483002. [PMID: 34479225 DOI: 10.1088/1361-648x/ac2389] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Accepted: 09/03/2021] [Indexed: 06/13/2023]
Abstract
Small angle x-ray scattering and x-ray absorption fine structure are two techniques that have been employed at synchrotron sources ever since their inception. Over the course of the development of the techniques, the introduction of sample environments for added value experiments has grown dramatically. This article reviews past successes, current developments and an exploration of future possibilities for these two x-ray techniques with an emphasis on the developments in the United Kingdom between 1980-2020.
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Affiliation(s)
| | - Andrew J Dent
- Diamond Light Source, Didcot, Oxfordshire, OX11 0DE, United Kingdom
| | - Barry Dobson
- Sagentia Ltd, Harston Mill, Harston Mill, CB22 7GG, United Kingdom
| | - Andrew M Beale
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, United Kingdom
- The Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell Campus, Didcot, Oxfordshire, OX11 0FA, United Kingdom
| | - Lisa Allen
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, United Kingdom
- The Research Complex at Harwell, Rutherford Appleton Laboratory, Harwell Campus, Didcot, Oxfordshire, OX11 0FA, United Kingdom
| | - Wim Bras
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, One Bethel Valley Road TN 37831, United States of America
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Ekanayake RSK, Chantler CT, Sier D, Schalken MJ, Illig AJ, de Jonge MD, Johannessen B, Kappen P, Tran CQ. High-accuracy measurement of mass attenuation coefficients and the imaginary component of the atomic form factor of zinc from 8.51 keV to 11.59 keV, and X-ray absorption fine structure with investigation of zinc theory and nanostructure. J Synchrotron Radiat 2021; 28:1492-1503. [PMID: 34475296 DOI: 10.1107/s1600577521005981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 06/08/2021] [Indexed: 06/13/2023]
Abstract
High-accuracy X-ray mass attenuation coefficients were measured from the first X-ray Extended Range Technique (XERT)-like experiment at the Australian Synchrotron. Experimentally measured mass attenuation coefficients deviate by ∼50% from the theoretical values near the zinc absorption edge, suggesting that improvements in theoretical tabulations of mass attenuation coefficients are required to bring them into better agreement with experiment. Using these values the imaginary component of the atomic form factor of zinc was determined for all the measured photon energies. The zinc K-edge jump ratio and jump factor are determined and results raise significant questions regarding the definitions of quantities used and best practice for background subtraction prior to X-ray absorption fine-structure (XAFS) analysis. The XAFS analysis shows excellent agreement between the measured and tabulated values and yields bond lengths and nanostructure of zinc with uncertainties of from 0.1% to 0.3% or 0.003 Å to 0.008 Å. Significant variation from the reported crystal structure was observed, suggesting local dynamic motion of the standard crystal lattice. XAFS is sensitive to dynamic correlated motion and in principle is capable of observing local dynamic motion beyond the reach of conventional crystallography. These results for the zinc absorption coefficient, XAFS and structure are the most accurate structural refinements of zinc at room temperature.
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Affiliation(s)
| | | | - Daniel Sier
- School of Physics, University of Melbourne, Australia
| | | | | | | | | | - Peter Kappen
- ANSTO, Australian Synchrotron, Melbourne, Australia
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Li J, Li Y, Routh PK, Makagon E, Lubomirsky I, Frenkel AI. Comparative analysis of XANES and E XAFS for local structural characterization of disordered metal oxides. J Synchrotron Radiat 2021; 28:1511-1517. [PMID: 34475298 DOI: 10.1107/s1600577521007025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 07/07/2021] [Indexed: 06/13/2023]
Abstract
In functional materials, the local environment around active species that may contain just a few nearest-neighboring atomic shells often changes in response to external conditions. Strong disorder in the local environment poses a challenge to commonly used extended X-ray absorption fine structure (EXAFS) analysis. Furthermore, the dilute concentrations of absorbing atoms, small sample size and the constraints of the experimental setup often limit the utility of EXAFS for structural analysis. X-ray absorption near-edge structure (XANES) has been established as a good alternative method to provide local electronic and geometric information of materials. The pre-edge region in the XANES spectra of metal compounds is a useful but relatively under-utilized resource of information of the chemical composition and structural disorder in nano-materials. This study explores two examples of materials in which the transition metal environment is either relatively symmetric or strongly asymmetric. In the former case, EXAFS results agree with those obtained from the pre-edge XANES analysis, whereas in the latter case they are in a seeming contradiction. The two observations are reconciled by revisiting the limitations of EXAFS in the case of a strong, asymmetric bond length disorder, expected for mixed-valence oxides, and emphasize the utility of the pre-edge XANES analysis for detecting local heterogeneities in structural and compositional motifs.
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Affiliation(s)
- Junying Li
- Materials Science and Chemical Engineering, Stony Brook University, 100 Nicolls Road, Stony Brook, NY 11794, USA
| | - Yuanyuan Li
- Materials Science and Chemical Engineering, Stony Brook University, 100 Nicolls Road, Stony Brook, NY 11794, USA
| | - Prahlad K Routh
- Materials Science and Chemical Engineering, Stony Brook University, 100 Nicolls Road, Stony Brook, NY 11794, USA
| | - Evgeniy Makagon
- Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Igor Lubomirsky
- Department of Materials and Interfaces, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Anatoly I Frenkel
- Materials Science and Chemical Engineering, Stony Brook University, 100 Nicolls Road, Stony Brook, NY 11794, USA
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44
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Ekanayake RSK, Chantler CT, Sier D, Schalken MJ, Illig AJ, de Jonge MD, Johannessen B, Kappen P, Tran CQ. High-accuracy mass attenuation coefficients and X-ray absorption spectroscopy of zinc - the first X-ray Extended Range Technique-like experiment in Australia. J Synchrotron Radiat 2021; 28:1476-1491. [PMID: 34475295 DOI: 10.1107/s1600577521005993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 06/08/2021] [Indexed: 06/13/2023]
Abstract
The first X-ray Extended Range Technique (XERT)-like experiment at the Australian Synchrotron, Australia, is presented. In this experiment X-ray mass attenuation coefficients are measured across an energy range including the zinc K-absorption edge and X-ray absorption fine structure (XAFS). These high-accuracy measurements are recorded at 496 energies from 8.51 keV to 11.59 keV. The XERT protocol dictates that systematic errors due to dark current nonlinearities, correction for blank measurements, full-foil mapping to characterize the absolute value of attenuation, scattering, harmonics and roughness are measured over an extended range of experimental parameter space. This results in data for better analysis, culminating in measurement of mass attenuation coefficients across the zinc K-edge to 0.023-0.036% accuracy. Dark current corrections are energy- and structure-dependent and the magnitude of correction reached 57% for thicker samples but was still large and significant for thin samples. Blank measurements scaled thin foil attenuation coefficients by 60-500%; and up to 90% even for thicker foils. Full-foil mapping and characterization corrected discrepancies between foils of up to 20%, rendering the possibility of absolute measurements of attenuation. Fluorescence scattering was also a major correction. Harmonics, roughness and bandwidth were explored. The energy was calibrated using standard reference foils. These results represent the most extensive and accurate measurements of zinc which enable investigations of discrepancies between current theory and experiments. This work was almost fully automated from this first experiment at the Australian Synchrotron, greatly increasing the possibility for large-scale studies using XERT.
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Affiliation(s)
| | | | - Daniel Sier
- School of Physics, University of Melbourne, Australia
| | | | | | | | | | - Peter Kappen
- ANSTO, Australian Synchrotron, Melbourne, Australia
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Sakata K, Takahashi Y, Takano S, Matsuki A, Sakaguchi A, Tanimoto H. First X-ray Spectroscopic Observations of Atmospheric Titanium Species: Size Dependence and the Emission Source. Environ Sci Technol 2021; 55:10975-10986. [PMID: 34314147 DOI: 10.1021/acs.est.1c02000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Titanium dioxide (TiO2) in mineral dust is considered as one of the driving forces of photocatalytic reaction at the aerosol surface in the atmosphere. As a precursor of mineral dust, soil contains ilmenite (FeTiO3) and titanite (CaSiTiO5), which have lower photochemical reactivities than TiO2. However, Ti species other than TiO2 in aerosol particles are not well recognized due to the lack of observation in ambient samples. In this study, Ti species in size-fractionated aerosol samples collected in the Noto Peninsula, Japan, were determined by macroscopic and semi-microscopic X-ray absorption fine structure spectroscopy. Regardless of aerosol particle size, Ti species were primarily composed of rutile, anatase, ilmenite, and titanite. Semi-microscopic Ti speciation showed that Ti-poor spots associated with mineral dust were composed of a mixture of rutile, anatase, ilmenite, and titanite, and Ti-rich spots were primarily composed of TiO2 (rutile or anatase) derived from authigenic minerals or anthropogenic materials. Thus, the Ti species in aerosol particles, especially mineral dust, were not composed solely of TiO2 polymorphs. Therefore, the photochemical reactivities of Ti in aerosol particles may be overestimated when laboratory experiments or model studies employ TiO2 as the representative Ti species.
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Affiliation(s)
- Kohei Sakata
- Center for Global Environmental Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
| | - Yoshio Takahashi
- Graduate School of Science, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shotaro Takano
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto 611-0011, Japan
| | - Atsushi Matsuki
- Institute of Nature and Environmental Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa 920-1192, Japan
| | - Aya Sakaguchi
- Faculty of Pure and Applied Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
| | - Hiroshi Tanimoto
- Center for Global Environmental Research, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan
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Li Y, Liu L, Wang D, Zhang H, He X, Li Q. The Study of Magnetic Properties for Non-Magnetic Ions Doped BiFeO 3. Materials (Basel) 2021; 14:ma14154061. [PMID: 34361255 PMCID: PMC8348179 DOI: 10.3390/ma14154061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 07/15/2021] [Accepted: 07/17/2021] [Indexed: 11/22/2022]
Abstract
BiFeO3 is considered as a single phase multiferroic. However, its magnetism is very weak. We study the magnetic properties of BiFeO3 by Cu and (Cu, Zn). Polycrystalline samples Bi(Fe0.95Cu0.05)O3 and BiFe0.95(Zn0.025Cu0.025)O3 are prepared by the sol-gel method. The magnetic properties of BiFe0.95(Zn0.025Cu0.025)O3 are greater than that of BiFeO3 and Bi(Fe0.95Cu0.05)O3. The analyses of X-ray absorption fine structure data show that the doped Cu atoms well occupy the sites of the Fe atoms. X-ray absorption near edge spectra data confirm that the valence state of Fe ions does not change. Cu and Zn metal ion co-doping has no impact on the local structure of the Fe and Bi atoms. The modification of magnetism by doping Zn can be understood by the view of the occupation site of non-magnetically active Zn2+.
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Affiliation(s)
- Yongtao Li
- School of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China; (Y.L.); (H.Z.); (X.H.)
- College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;
- New Energy Technology Engineering Laboratory of Jiangsu Province, Nanjing 210023, China
| | - Liqing Liu
- School of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China; (Y.L.); (H.Z.); (X.H.)
- New Energy Technology Engineering Laboratory of Jiangsu Province, Nanjing 210023, China
- Correspondence:
| | - Dehao Wang
- College of Electronic Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China;
| | - Hongguang Zhang
- School of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China; (Y.L.); (H.Z.); (X.H.)
- New Energy Technology Engineering Laboratory of Jiangsu Province, Nanjing 210023, China
| | - Xuemin He
- School of Science, Nanjing University of Posts and Telecommunications, Nanjing 210023, China; (Y.L.); (H.Z.); (X.H.)
- New Energy Technology Engineering Laboratory of Jiangsu Province, Nanjing 210023, China
| | - Qi Li
- School of Physics, Southeast University, Nanjing 211189, China;
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German KE, Fedoseev AM, Grigoriev MS, Kirakosyan GA, Dumas T, Den Auwer C, Moisy P, Lawler KV, Forster PM, Poineau F. A 70-Year-Old Mystery in Technetium Chemistry Explained by the New Technetium Polyoxometalate [H 7 O 3 ] 4 [Tc 20 O 68 ] ⋅ 4H 2 O. Chemistry 2021; 27:13624-13631. [PMID: 34245056 DOI: 10.1002/chem.202102035] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Indexed: 11/11/2022]
Abstract
[H7 O3 ]4 [Tc20 O68 ] ⋅ 4H2 O [1] was prepared from an aqueous Tc2 O7 solution concentrated over anhydrous H2 SO4 . [Tc20 O68 ]4- is the first polyanionic species to be reported for Tc. The unit cell contains one centrosymmetric [Tc20 O68 ]4- polyanion as well as hydronium ions and water molecules. The core of the structure consists of four Tc(V)O6 octahedra that form a square Tc4 O4 ring. The four Tc(V)O6 octahedra are decorated by sixteen Tc(VII)O4 tetrahedra. Calculations show the bonding within the Tc4 O4 ring to consist of a 3-center bond formed between each neighboring pair of Tc atoms and their bridging oxygen. Calculations also indicate that a strong d→d electronic transition at 513 nm is the origin of the red color of [1]. The characterization of red HTcO4 solutions by X-ray absorption spectroscopy has complemented the description of this compound in aqueous solution. The formation mechanisms in solution, including the possible role of technetium's radioactivity in the formation of [1], are discussed.
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Affiliation(s)
- Konstantin E German
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr.31-4, Moscow, Russian Federation
| | - Alexander M Fedoseev
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr.31-4, Moscow, Russian Federation
| | - Mikhail S Grigoriev
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr.31-4, Moscow, Russian Federation
| | - Gayane A Kirakosyan
- Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr.31-4, Moscow, Russian Federation.,Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Leninsky pr.31, Russian Federation
| | - Thomas Dumas
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, France
| | | | - Philippe Moisy
- CEA, DES, ISEC, DMRC, Univ Montpellier, Marcoule, France
| | - Keith V Lawler
- Department of Chemistry and Biochemistry, University of Nevada Las Vegas, 4505 Maryland Parkway, Las Vegas, NV, 89154, USA
| | - Paul M Forster
- Department of Chemistry and Biochemistry, University of Nevada Las Vegas, 4505 Maryland Parkway, Las Vegas, NV, 89154, USA
| | - Frederic Poineau
- Department of Chemistry and Biochemistry, University of Nevada Las Vegas, 4505 Maryland Parkway, Las Vegas, NV, 89154, USA
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Tayal A, Seo O, Kim J, Kobayashi H, Yamamoto T, Matsumura S, Kitagawa H, Sakata O. Mechanism of Hydrogen Storage and Structural Transformation in Bimetallic Pd-Pt Nanoparticles. ACS Appl Mater Interfaces 2021; 13:23502-23512. [PMID: 33988965 DOI: 10.1021/acsami.0c22432] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The hydrogen storage capacity of Pd nanoparticles (NPs) decreases as the particles become smaller; however, this reduced capacity is ameliorated by addition of Pt. In the present work, the hydrogen storage mechanism and structural transformations of core (Pd)-shell (Pt) (CS) and solid-solution (SS) NPs during hydrogen absorption and desorption (PHAD) processes are investigated. In situ X-ray absorption spectroscopy measurements were performed to study the evolution of electronic and local structures around Pd and Pt during PHAD. Under ambient conditions, Pd and Pt have distinct local structures. The Pd atomic pairs are more strained in CS NPs than in SS NPs. A similar behavior has been seen in CS NPs after PHAD. The Pd K-edge extended X-ray absorption fine structure data indicate that in CS and SS NPs a substantial fraction of the signal derives from Pd-Pd atomic pairs, indicating that Pd clusters remain present even after PHAD. PHAD causes a rearrangement of the interfacial structure, which becomes homogeneously distributed. The higher coverage of active bimetallic sites results in a higher observed hydrogen storage capacity in the SS phase.
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Affiliation(s)
- Akhil Tayal
- Deutsches Elektronen-Synchrotron, Notkestrasse 85, 22607 Hamburg, Germany
| | - Okkyun Seo
- Synchrotron X-ray Group, Research Center for Advanced Measurement and Characterization, National Institute for Materials Science, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan
| | - Jaemyung Kim
- Synchrotron X-ray Group, Research Center for Advanced Measurement and Characterization, National Institute for Materials Science, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan
| | - Hirokazu Kobayashi
- Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Tomokazu Yamamoto
- Department of Applied Quantum Physics and Nuclear Engineering and The Ultramicroscopy Research Center, Kyushu University, Fukuoka 819-0395, Japan
| | - Syo Matsumura
- Department of Applied Quantum Physics and Nuclear Engineering and The Ultramicroscopy Research Center, Kyushu University, Fukuoka 819-0395, Japan
| | - Hiroshi Kitagawa
- Division of Chemistry, Graduate School of Science, Kyoto University, Kitashirakawa Oiwake-cho, Sakyo-ku, Kyoto 606-8502, Japan
| | - Osami Sakata
- Synchrotron X-ray Group, Research Center for Advanced Measurement and Characterization, National Institute for Materials Science, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan
- Department of Materials Science and Engineering, Tokyo Institute of Technology, Nagatsuta, Midori, Yokohama 226-8502, Japan
- Center for Synchrotron Radiation Research, Japan Synchrotron Radiation Research Institute (JASRI), 1-1-1 Kouto, Sayo, Hyogo 679-5198, Japan
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Pao CW, Chen JL, Lee JF, Tsai MC, Huang CY, Chiu CC, Chang CY, Chiang LC, Huang YS. The new X-ray absorption fine-structure beamline with sub-second time resolution at the Taiwan Photon Source. J Synchrotron Radiat 2021; 28:930-938. [PMID: 33950001 PMCID: PMC8127382 DOI: 10.1107/s1600577521001740] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 02/12/2021] [Indexed: 05/31/2023]
Abstract
The new TPS 44A beamline at the Taiwan Photon Source, located at the National Synchrotron Radiation Research Center, is presented. This beamline is equipped with a new quick-scanning monochromator (Q-Mono), which can provide both conventional step-by-step scans (s-scans) and on-the-fly scans (q-scans) for X-ray absorption fine-structure (XAFS) spectroscopy experiments, including X-ray absorption near-edge structure (XANES) and extended X-ray absorption fine-structure (EXAFS) spectral measurements. Ti and Te K-edge XAFS spectra were used to demonstrate the capability of collecting spectra at the limits of the working energy range. The Ni and Cu K-edge XAFS spectra for a Cu-doped Pt/Ni nanocomposite were acquired to test the performance of the newly commissioned beamline. Pt L3- and Ru K-edge quick-scanning XAFS (QXAFS) spectra for standard Pt and Ru foils, respectively, revealed the stability of the q-scan technique. The results also demonstrated the beamline's ability to collect XAFS spectra on a sub-second timescale. Furthermore, a Zn(s)|Zn2+(aq)|Cu(s) system was tested to indicate that the states of the Zn electrode could be observed in real time for charging and discharging conditions using an in situ/operando setup combined with QXAFS measurements.
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Affiliation(s)
- Chih-Wen Pao
- National Synchrotron Radiation Research Center, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Jeng-Lung Chen
- National Synchrotron Radiation Research Center, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Jyh-Fu Lee
- National Synchrotron Radiation Research Center, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Meng-Che Tsai
- NanoElectroChemistry Lab, Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei, Taiwan
| | - Chi-Yi Huang
- National Synchrotron Radiation Research Center, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Chao-Chih Chiu
- National Synchrotron Radiation Research Center, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Chao-Yu Chang
- National Synchrotron Radiation Research Center, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Liang-Chih Chiang
- National Synchrotron Radiation Research Center, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
| | - Yu-Shan Huang
- National Synchrotron Radiation Research Center, Hsin-Ann Road, Hsinchu Science Park, Hsinchu 30076, Taiwan
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50
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El-Hasan T, Harfouche M, Aldrabee A, Abdelhadi N, Abu-Jaber N, Aquilanti G. Synchrotron XANES and E XAFS evidences for Cr +6 and V +5 reduction within the oil shale ashes through mixing with natural additives and hydration process. Heliyon 2021; 7:e06769. [PMID: 33937543 PMCID: PMC8079444 DOI: 10.1016/j.heliyon.2021.e06769] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Revised: 03/07/2021] [Accepted: 04/07/2021] [Indexed: 12/04/2022] Open
Abstract
Solid friable residues (i.e. Ash) from combusted oil shale are a major environmental issue because they are highly enriched with toxic elements following combustion. The synchrotron based techniques X-ray Absorption Fine Structure (XAFS) were used for determining the changes in speciation of Chromium (Cr) and Vanadium (V) in the ash and its mixtures with Red soil and Phosphogypsum as additives, through one-year period of hydration process. The X-ray Absorption Near Edge Structure (XANES) qualitative results indicate that all mixtures exhibits similar patterns showing that Vanadium has remain as pentavalent state, on the contrary Chromium has dramatic decreased from hexavalent to trivalent. This change in Cr speciation became clearer with increasing hydration period. Therefore, the results confirmed the advantage of the hydration process in the Cr(VI) reduction which might be due the domination of carbonate phase within all mixtures, thus hydration caused carbonate dissolution that increase the pH toward more alkaline which caused the Cr(IV) reduction into less-harmful and less mobile Cr(III). This increase in pH was not in favor of changing the V(V) into V(IV) due to its large stability field V(V). The Extend X-ray Absorption Fine Structure (EXAFS) analysis showed that Cr exhibiting a coordination shell of C-atoms as first nearest neighbors backscattering atoms around Cr, and at C-atoms backscattering at medium range order. This confirmed the domination of carbonate media through the best fitting of Cr–C. Which might be attributed to the more alkaline conditions developed during saturation of water (hydration), that accelerates of the reduction of Cr(VI) into Cr(III). This means simply that hydration of the ash can reduce the presence of harmful Cr(VI) in these ash tailings.
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Affiliation(s)
- Tayel El-Hasan
- Department of Chemistry, Mutah University, 61710, Mutah, Jordan
| | | | | | - Nafeth Abdelhadi
- Faculty of Engineering and Technology, Al-Balqa Technical University, Amman, Jordan
| | - Nizar Abu-Jaber
- Dept. of Civil and Environmental Engineering, German Jordanian University, Naour, Jordan
| | - Giuliana Aquilanti
- Elettra - Sincrotrone Trieste, Area Science Park, 34149 Basovizza, Trieste, Italy
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