1
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Chai J, Liu C, Yang H, Han Y, Liu Y, Zhang Y, Zhang X. Dual Functions of Fluorescence and Peroxidase Mimics for Hemin@NH 2-UiO-66 and Ratiometric Fluorescence Sensing to l-Cysteine. Inorg Chem 2025; 64:9886-9896. [PMID: 40329512 DOI: 10.1021/acs.inorgchem.5c01491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2025]
Abstract
The bifunctions of fluorescence activity and peroxidase mimics were well-integrated by a hemin chloride-modified Zr-based metal-organic framework (Hemin@NH2-UiO-66), which can catalyze the oxidation of o-phenylenediamine (OPD) to generate 2,3-diaminophenazine (DAP), presenting typical peroxidase mimic properties. The influence of the introduction of hemin chloride upon the enhanced peroxidase mimic activity was clarified, and the nanozyme catalytic parameters were optimized. Interestingly, the oxidized product of DAP presents strong fluorescence emission at 564 nm; combining it with the intrinsic fluorescence emission of NH2-UiO-66 at 452 nm, a dual-emission system could be built up by the resulting Hemin@NH2-UiO-66 in the presence of definite OPD and H2O2. Moreover, the fluorescence quenching effect (564 nm) was observed by adding l-cysteine (l-Cys); based on that, a straight-line dependence of the fluorescence intensity ratio (I452/I564) upon the concentrations of l-Cys was established. The detection limit was 0.21 μmol, and the analytical selectivity for l-Cys was also demonstrated. The work highlights the idea of combining the intrinsic fluorescence property and nanozyme catalytic activity in a functional MOF, and its special usability is found in the ratiometric fluorescence sensing analyses.
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Affiliation(s)
- Jin Chai
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, P. R. China
| | - Chunpeng Liu
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, P. R. China
| | - Hongtian Yang
- Institute of Basic Medical Sciences of Xiyuan Hospital, China Academy of Traditional Chinese Medicine, Beijing 100091, P. R. China
| | - Yide Han
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, P. R. China
| | - Yufeng Liu
- College of Pharmacy, Liaoning University, Shenyang 110036, China
| | - Ying Zhang
- Institute of Basic Medical Sciences of Xiyuan Hospital, China Academy of Traditional Chinese Medicine, Beijing 100091, P. R. China
| | - Xia Zhang
- Department of Chemistry, College of Sciences, Northeastern University, Shenyang 110819, P. R. China
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2
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Souza FL, Rodríguez-Gutiérrez I, Souza JB, Leite ER. Revisiting strategies to improve the performance of hematite photoanodes for water photoelectrolysis. Phys Chem Chem Phys 2025; 27:642-654. [PMID: 39665590 DOI: 10.1039/d4cp02922d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2024]
Abstract
Photoelectrochemical (PEC) water splitting is emerging as a sustainable approach for producing green hydrogen. The design of efficient photoanodes is the key for the step forward technological application in which morphology optimization and defect engineering play central roles. In this perspective, the intricate interplay between morphology optimization, band engineering and chemical modifications is critically discussed. First, a brief introduction of the relevant aspects of semiconductors applied in PEC devices is provided. Then, a critical analysis of the influence of morphology and chemical modifications is presented, with hematite employed as a model system. Lastly, insights into future directions and outlooks for existing challenges on the development of photoelectrochemical devices for water splitting are displayed.
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Affiliation(s)
- Flavio L Souza
- Brazilian Nanotechnology National Laboratory (LNNANO), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-970, Brazil.
- Centro de Ciências Naturais e Humanas (CCNH), Federal University of ABC (UFABC), Santo André 09210580, Brazil
- Institute of Chemistry, University of Campinas (UNICAMP), PO Box 6154, Campinas, São Paulo, Brazil
| | - Ingrid Rodríguez-Gutiérrez
- Brazilian Nanotechnology National Laboratory (LNNANO), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-970, Brazil.
| | - João Batista Souza
- Brazilian Nanotechnology National Laboratory (LNNANO), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-970, Brazil.
- Institute of Chemistry, University of Campinas (UNICAMP), PO Box 6154, Campinas, São Paulo, Brazil
| | - Edson R Leite
- Brazilian Nanotechnology National Laboratory (LNNANO), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-970, Brazil.
- Departamento de Química, Universidade Federal de São Carlos, São Carlo, 13565-905, Brazil
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3
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Xu C, Wang H, Guo H, Liang K, Zhang Y, Li W, Chen J, Lee JS, Zhang H. Parallel multi-stacked photoanodes of Sb-doped p-n homojunction hematite with near-theoretical solar conversion efficiency. Nat Commun 2024; 15:9712. [PMID: 39521777 PMCID: PMC11550853 DOI: 10.1038/s41467-024-53967-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2024] [Accepted: 10/29/2024] [Indexed: 11/16/2024] Open
Abstract
Developing transparent and efficient photoanodes is a challenging but essential task in tandem photoelectrochemical cell for unassisted solar water splitting without an external bias. Here we report construction of p-n homojunction hematite photoanodes by hybrid microwave annealing-induced single antimony doping, which results in the gradually-increased valence states from the surface to the inside by the unique features of hybrid microwave annealing. The Sb-doped p-n homojunction hematite photoanode exhibits improved performance and displays a good transparency, achieving a stable photocurrent density of ~4.21 mA cm-2 at 1.23 VRHE under 100 mW cm-2 solar irradiation, which is comparable to the reported state-of-the-art hematite photoanodes. More importantly, a parallel-connected stack of six photoanodes of transparent p-n homojunction records a near-theoretical photocurrent density of ~10 mA cm-2 at 1.23 VRHE under standard photoelectrochemical water splitting conditions, which serves as a useful reference for hematite photoanodes and promises its practical application for unbiased photoelectrochemical water splitting.
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Affiliation(s)
- Chenyang Xu
- College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Hongxin Wang
- College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Hongying Guo
- College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Ke Liang
- College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Yuanming Zhang
- College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Weicong Li
- College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, China
| | - Junze Chen
- College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, China.
- Engineering Research Center of Alternative Energy Materials & Devices, Ministry of Education, Sichuan University, Chengdu, 610065, China.
| | - Jae Sung Lee
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), 50 UNIST-gil, Ulsan, 44919, Republic of Korea.
| | - Hemin Zhang
- College of Materials Science and Engineering, Sichuan University, Chengdu, 610065, China.
- Engineering Research Center of Alternative Energy Materials & Devices, Ministry of Education, Sichuan University, Chengdu, 610065, China.
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4
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Jin X, Huang Q, Li X, Lu G, Yao Q, Xu F, Guo C, Dang Z. Divergent repartitioning of antimony and arsenic during jarosite transformation: A comparative study under aerobic and anaerobic conditions. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 898:165533. [PMID: 37453703 DOI: 10.1016/j.scitotenv.2023.165533] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 07/11/2023] [Accepted: 07/12/2023] [Indexed: 07/18/2023]
Abstract
Jarosite is the host mineral of Sb(V) and As(V) in mining environments. However, the repartitioning of Sb and As during its transformation is poorly understood. Additionally, the mutual effect between the redistribution behavior of As and Sb during jarosite conversion remains unclear. Here, we investigated the transformation of Sb(V)-, As(V)- and Sb(V)-As(V)-jarosite at pH 5.5 under aerobic and anaerobic conditions without a reductant. The results indicated that co-precipitated Sb(V) promotes jarosite dissolution, and the final products were mainly goethite and hematite. In contrast, the co-precipitated As(V) retarded jarosite dissolution and altered the transformation pathway, mainly forming lepidocrocite, which might be attributed to the formation of As-Fe complexes on the jarosite surface. The inhibiting or promoting effect increased with the increase in co-precipitated As or Sb concentration. In the treatment with Sb(V)-As(V)-jarosite, the inhibition effect of co-precipitated As(V) on mineral dissolution was predominant, but the end-products were mainly goethite and hematite. Compared with the aerobic system, the dissolution and transformation of jarosite in treatments in the anaerobic system occurred faster, although without a reductant, which was possibly associated with the reduced CO2 content in the reaction solutions after degassing. In all treatments, the release of Sb(aq) and As(aq) into the solution was negligible during jarosite transformation. The transformation processes drove As into the surface-bound exchangeable and poorly crystalline phases, while Sb was typically redistributed in the poorly crystalline phase. During the transformation of Sb(V)-As(V)-jarosite, the co-existence of As significantly increased the proportion of Sb distributed on the solid surface and in the poorly crystalline phase. These findings are valuable for predicting the long-term fate of Sb and As in mining environments.
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Affiliation(s)
- Xiaohu Jin
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou 510006, PR China
| | - Qi Huang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou 510006, PR China
| | - Xiaofei Li
- School of Environmental and Chemical Engineering, Foshan University, 528000 Foshan, PR China
| | - Guining Lu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou 510006, PR China.
| | - Qian Yao
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou 510006, PR China
| | - Fengjia Xu
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China
| | - Chuling Guo
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou 510006, PR China
| | - Zhi Dang
- School of Environment and Energy, South China University of Technology, Guangzhou 510006, PR China; The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, South China University of Technology, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong 510006, PR China.
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5
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Kim YM, Hong Y, Hur K, Kim MS, Sung YM. Surface Rh-Boosted Photoelectrochemical Water Oxidation of α-Fe 2O 3 by Reduced Overpotential in the Rate-Determining Step. ACS APPLIED MATERIALS & INTERFACES 2023; 15:37290-37299. [PMID: 37489940 DOI: 10.1021/acsami.3c04458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/26/2023]
Abstract
The photoelectrochemical behavior of Rh cluster-deposited hematite (α-Fe2O3) photoanodes (α-Fe2O3@Rh) was investigated. The interactions between Rh clusters and α-Fe2O3 nanorods were elucidated both experimentally and computationally. A facile UV-assisted solution casting deposition method allowed the deposition of 2 nm Rh clusters on α-Fe2O3. The deposited Rh clusters effectively enhanced the photoelectrochemical performance of the α-Fe2O3 photoanode, and electrochemical impedance spectroscopy (EIS) and Mott-Schottky analysis were applied to understand the working mechanism for the α-Fe2O3@Rh photoanodes. The results revealed a distinctive carrier transport mechanism for α-Fe2O3@Rh and increased carrier density, while the absorbance spectra remained unchanged. Furthermore, density functional theory (DFT) calculations of the oxygen evolution reaction (OER) mechanism corresponded well with the experimental results, indicating a reduced overpotential of the rate-determining step. In addition, DFT calculation models based on the X-ray diffraction (XRD) measurements and X-ray photoelectron spectroscopy (XPS) results provided precise water-splitting mechanisms for the fabricated α-Fe2O3 and α-Fe2O3@Rh nanorods. Owing to enhanced carrier generation and hole transfer, the optimum α-Fe2O3@Rh3 sample showed 78% increased photocurrent density, reaching 1.12 mA/cm-2 at 1.23 VRHE compared to that of the pristine α-Fe2O3 nanorods electrode.
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Affiliation(s)
- Young-Min Kim
- Department of Materials Science & Engineering, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 02841, Republic of Korea
| | - Yerin Hong
- Extreme Materials Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Kahyun Hur
- Extreme Materials Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Min-Seok Kim
- Extreme Materials Research Center, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
| | - Yun-Mo Sung
- Department of Materials Science & Engineering, Korea University, Anam-ro 145, Seongbuk-gu, Seoul 02841, Republic of Korea
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Rudatis P, Hrubesch J, Kremshuber S, Apaydin DH, Eder D. Enhanced Oxygen Evolution Reaction Activity in Hematite Photoanodes: Effect of Sb-Li Co-Doping. ACS OMEGA 2023; 8:2027-2033. [PMID: 36687027 PMCID: PMC9850461 DOI: 10.1021/acsomega.2c05241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 12/01/2022] [Indexed: 06/17/2023]
Abstract
Co-doping represents a valid approach to maximize the performance of photocatalytic and photoelectrocatalytic semiconductors. Albeit theoretical predictions in hematite suggesting a bulk n-type doping and a surface p-type doping would deliver best results, hematite co-doping with coupled cations possessing low and high oxidation states has shown promising results. Herein, we report, for the first time, Sb and Li co-doping of hematite photoanodes. Particularly, this is also a seminal work for the introduction of the highly reactive Sb5+ directly into the hematite thin films. Upon co-doping, we have a synergistic effect on the current densities with a 67-fold improvement over the standard. Via a combined investigation with profuse photoelectrochemical measurements, X-ray diffraction, X-ray photoelectron spectroscopy, and Raman analyses, we confirm the two doping roles of Sb5+ and Li+ as the substitutional and interstitial dopant, respectively. The improvements are attributed to a higher charge carrier concentration along with a lower charge transfer resistance at the surface.
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7
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Porous and conductive SnO2 ceramics as a promising nanostructured substrate to host photocatalytic hematite coatings: Towards low cost solar-driven water splitting. CATAL COMMUN 2022. [DOI: 10.1016/j.catcom.2022.106593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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8
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He Q, Liu Y, Wan D, Liu Y, Xiao S, Wang Y, Shi Y. Enhanced biological antimony removal from water by combining elemental sulfur autotrophic reduction and disproportionation. JOURNAL OF HAZARDOUS MATERIALS 2022; 434:128926. [PMID: 35452992 DOI: 10.1016/j.jhazmat.2022.128926] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 04/10/2022] [Accepted: 04/11/2022] [Indexed: 06/14/2023]
Abstract
Antimony (Sb), a toxic metalloid, has serious negative effects on human health and its pollution has become a global environmental problem. Bio-reduction of Sb(V) is an effective Sb-removal approach. This work, for the first time, demonstrates the feasibility of autotrophic Sb(V) bio-reduction and removal coupled to anaerobic oxidation of elemental sulfur (S0). In the S0-based biological system, Sb(V) was reduced to Sb(III) via autotrophic bacteria by using S0 as electron donor. Meanwhile, S0 disproportionation reaction occurred under anaerobic condition, generating sulfide and SO42- in the bio-systems. Subsequently, Sb(III) reacted with sulfide and formed Sb(III)-S precipitate, achieving an effective total Sb removal. The precipitate was identified as Sb2S3 by SEM-EDS, XPS, XRD and Raman spectrum analyses. In addition, it was found that co-existing nitrate inhibited the Sb removal, as nitrate is the favored electron acceptor over Sb(V). In contrast, the bio-reduction of co-existing SO42- enhanced sulfide generation, followed by promoting Sb(V) reduction and precipitation. Illumina high-throughput sequencing analysis revealed that Metallibacterium, Citrobacter and Thiobacillus might be responsible for Sb(V) reduction and S0 disproportionation. This study provides a promising approach for the remediation of Sb(V)-contaminated water.
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Affiliation(s)
- Qiaochong He
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China; Henan International Joint Laboratory of Environmental Pollution, Remediation and Grain Quality Security, Zhengzhou, Henan 450001, China
| | - Yang Liu
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Dongjin Wan
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China; Henan International Joint Laboratory of Environmental Pollution, Remediation and Grain Quality Security, Zhengzhou, Henan 450001, China.
| | - Yongde Liu
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Shuhu Xiao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Yiduo Wang
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Yahui Shi
- College of Environmental Engineering, Henan University of Technology, Zhengzhou 450001, China
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9
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Rodríguez-Gutiérrez I, Bedin KC, Mouriño B, Souza Junior JB, Souza FL. Advances in Engineered Metal Oxide Thin Films by Low-Cost, Solution-Based Techniques for Green Hydrogen Production. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:1957. [PMID: 35745297 PMCID: PMC9229379 DOI: 10.3390/nano12121957] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 05/06/2022] [Accepted: 05/17/2022] [Indexed: 02/07/2023]
Abstract
Functional oxide materials have become crucial in the continuous development of various fields, including those for energy applications. In this aspect, the synthesis of nanomaterials for low-cost green hydrogen production represents a huge challenge that needs to be overcome to move toward the next generation of efficient systems and devices. This perspective presents a critical assessment of hydrothermal and polymeric precursor methods as potential approaches to designing photoelectrodes for future industrial implementation. The main conditions that can affect the photoanode's physical and chemical characteristics, such as morphology, particle size, defects chemistry, dimensionality, and crystal orientation, and how they influence the photoelectrochemical performance are highlighted in this report. Strategies to tune and engineer photoelectrode and an outlook for developing efficient solar-to-hydrogen conversion using an inexpensive and stable material will also be addressed.
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Affiliation(s)
- Ingrid Rodríguez-Gutiérrez
- Centro de Ciências Naturais e Humanas (CCNH), Federal University of ABC (UFABC), Santo André 09210-580, SP, Brazil
- Brazilian Nanotechnology National Laboratory (LNNANO), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-970, SP, Brazil; (K.C.B.); (B.M.); (J.B.S.J.)
| | - Karen Cristina Bedin
- Brazilian Nanotechnology National Laboratory (LNNANO), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-970, SP, Brazil; (K.C.B.); (B.M.); (J.B.S.J.)
| | - Beatriz Mouriño
- Brazilian Nanotechnology National Laboratory (LNNANO), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-970, SP, Brazil; (K.C.B.); (B.M.); (J.B.S.J.)
| | - João Batista Souza Junior
- Brazilian Nanotechnology National Laboratory (LNNANO), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-970, SP, Brazil; (K.C.B.); (B.M.); (J.B.S.J.)
- Institute of Chemistry, University of Campinas (UNICAMP), P.O. Box 6154, Campinas 13083-970, SP, Brazil
| | - Flavio Leandro Souza
- Centro de Ciências Naturais e Humanas (CCNH), Federal University of ABC (UFABC), Santo André 09210-580, SP, Brazil
- Brazilian Nanotechnology National Laboratory (LNNANO), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas 13083-970, SP, Brazil; (K.C.B.); (B.M.); (J.B.S.J.)
- Institute of Chemistry, University of Campinas (UNICAMP), P.O. Box 6154, Campinas 13083-970, SP, Brazil
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10
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Solution chemistry back-contact FTO/hematite interface engineering for efficient photocatalytic water oxidation. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)63973-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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11
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Patil MS, Kitchamsetti N, Mulani SR, Rondiya SR, Deshpande NG, Patil RA, Cross RW, Dzade NY, Sharma KK, Patil PS, Ma YR, Cho HK, Devan RS. Photocatalytic behavior of Ba(Sb/Ta)2O6 perovskite for reduction of organic pollutants: Experimental and DFT correlation. J Taiwan Inst Chem Eng 2021. [DOI: 10.1016/j.jtice.2021.04.032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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12
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Moi CT, Bhowmick S, Sahu TK, Qureshi M. Electrocatalytic oxygen evolution surpassing benchmark RuO2 using stable, noble metal free vanadium doped hematite co-modified by NiFe Layered Double Hydroxide. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.137726] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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13
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Wang T, Long X, Wei S, Wang P, Wang C, Jin J, Hu G. Boosting Hole Transfer in the Fluorine-Doped Hematite Photoanode by Depositing Ultrathin Amorphous FeOOH/CoOOH Cocatalysts. ACS APPLIED MATERIALS & INTERFACES 2020; 12:49705-49712. [PMID: 33104336 DOI: 10.1021/acsami.0c15568] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The charge transfer is a key issue in the development of efficient photoelectrodes. Here, we report a method using F-doping and dual-layer ultrathin amorphous FeOOH/CoOOH cocatalysts coupling to enable the inactive α-Fe2O3 photoanode to become highly vibrant for the oxygen evolution reaction (OER). Fluorine doping is revealed to increase the charge density and improve the conductivity of α-Fe2O3 for rapid charge transfer. Furthermore, ultrathin FeOOH was deposited on F-Fe2O3 to extract photogenerated holes and passivate the surface states for accelerated charge carrier transfer. Moreover, CoOOH as an excellent cocatalyst was coated onto FeOOH/F-Fe2O3 with the photoassisted electrodeposition method remarkably expediting OER kinetics through an optional pathway of holes utilized by Co species. Ultimately, the CoOOH/FeOOH/F-Fe2O3 photoanode exhibits a satisfactory photocurrent density (3.3-fold higher than pristine α-Fe2O3) and a negatively shifted onset potential of 80 mV. This work showcases an appealing maneuver to activate the water oxidation performance of the α-Fe2O3 photoanode by an integration strategy of heteroatom doping and cocatalyst coupling.
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Affiliation(s)
- Tong Wang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), The Key Laboratory of Catalytic Engineering of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, P. R. China
| | - Xuefeng Long
- College of Petrochemical Technology, Lanzhou University of Technology, Langongping Road 287, Lanzhou 730050, P. R. China
| | - Shenqi Wei
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), The Key Laboratory of Catalytic Engineering of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, P. R. China
| | - Peng Wang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), The Key Laboratory of Catalytic Engineering of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, P. R. China
| | - Chenglong Wang
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), The Key Laboratory of Catalytic Engineering of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, P. R. China
| | - Jun Jin
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), The Key Laboratory of Catalytic Engineering of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, P. R. China
| | - Guowen Hu
- State Key Laboratory of Applied Organic Chemistry (SKLAOC), The Key Laboratory of Catalytic Engineering of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu 730000, P. R. China
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14
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Ma H, Kwon JA, Mahadik MA, Kim S, Lee HH, Choi SH, Chae WS, Lim DH, Jang JS. Effect of Sn-self diffusion via H 2 treatment on low temperature activation of hematite photoanodes. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00763c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
A simple approach of lowering the activation temperature for hematite photoanode was developed. H2 treatment and air quenching allows Sn4+ diffusion from FTO to hematite which exhibited the photocurrent density of 1.17 mA cm−2 at 1.23 V vs. RHE.
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Affiliation(s)
- Haiqing Ma
- Division of Biotechnology
- Advanced Institute of Environmental and Bioscience
- College of Environmental and Bioresource Sciences
- Chonbuk National University
- Iksan 570-752
| | - Jeong An Kwon
- Department of Environmental Engineering
- Chungbuk National University
- Cheongju
- Republic of Korea
| | - Mahadeo A. Mahadik
- Division of Biotechnology
- Advanced Institute of Environmental and Bioscience
- College of Environmental and Bioresource Sciences
- Chonbuk National University
- Iksan 570-752
| | - Sarang Kim
- Division of Biotechnology
- Advanced Institute of Environmental and Bioscience
- College of Environmental and Bioresource Sciences
- Chonbuk National University
- Iksan 570-752
| | - Hyun Hwi Lee
- Pohang Accelerator Laboratory (PAL)
- Pohang University of Science and Technology (POSTECH)
- Pohang 37673
- Republic of Korea
| | - Sun Hee Choi
- Pohang Accelerator Laboratory (PAL)
- Pohang University of Science and Technology (POSTECH)
- Pohang 37673
- Republic of Korea
| | - Weon-Sik Chae
- Korea Basic Science Institute, Daegu Center
- Daegu 41566
- Republic of Korea
| | - Dong-Hee Lim
- Department of Environmental Engineering
- Chungbuk National University
- Cheongju
- Republic of Korea
| | - Jum Suk Jang
- Division of Biotechnology
- Advanced Institute of Environmental and Bioscience
- College of Environmental and Bioresource Sciences
- Chonbuk National University
- Iksan 570-752
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15
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Wang L, Zhu J, Liu X. Oxygen-Vacancy-Dominated Cocatalyst/Hematite Interface for Boosting Solar Water Splitting. ACS APPLIED MATERIALS & INTERFACES 2019; 11:22272-22277. [PMID: 31244023 DOI: 10.1021/acsami.9b03789] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Surface suppression is one of critical issues for semiconductors in photoelectrochemical (PEC) water splitting. Deposition of oxygen evolution cocatalysts on photoanodes can improve the oxygen evolution rate, but still it has some limits in some cases. In this work, we propose a new and simple precipitation approach to transform the surface of hematite into iron phosphate (Fe-Pi). Further, Ar-plasma treatment on Fe-Pi/Fe2O3 introduces oxygen vacancies on the phosphorous and photoanode. A surface phosphate treatment accelerates the transfer of holes from the bulk to the surface. Besides, creating oxygen vacancy defects on Fe-Pi/Fe2O3 can significantly increase the reactivity of active sites, leading to the remarkable enhancement in oxygen evolution reaction activity and PEC performance. The resulting photoanode has a current density of 2.71 mA cm-2 at 1.23 VRHE and 3.5 mA cm-2 at 1.50 VRHE under simulated solar light condition. The reduced surface recombination by Fe-Pi layer and Ar-plasma treatment is confirmed by electrochemical analysis. These findings give a great potential of the use of a combination strategy for cocatalyst deposition and optimizing the performance of hematite.
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Affiliation(s)
- Lei Wang
- College of Chemistry and Chemical Engineering and Inner Mongolia Key Lab of Nanoscience and Nanotechnology , Inner Mongolia University , Hohhot 010021 , China
- State Key Laboratory for Oxo Synthesis and Selective Oxidation, National Engineering Research Center for Fine Petrochemical Intermediates , Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences , Lanzhou 730000 , China
- Key Laboratory of Materials Processing and Mold, Ministry of Education , Zhengzhou University , Zhengzhou 450002 , China
| | - Jie Zhu
- College of Chemistry and Chemical Engineering and Inner Mongolia Key Lab of Nanoscience and Nanotechnology , Inner Mongolia University , Hohhot 010021 , China
| | - Xianhu Liu
- Key Laboratory of Materials Processing and Mold, Ministry of Education , Zhengzhou University , Zhengzhou 450002 , China
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16
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Fe2O3 Blocking Layer Produced by Cyclic Voltammetry Leads to Improved Photoelectrochemical Performance of Hematite Nanorods. SURFACES 2019. [DOI: 10.3390/surfaces2010011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Hematite is a low band gap, earth abundant semiconductor and it is considered to be a promising choice for photoelectrochemical water splitting. However, as a bulk material its efficiency is low because of excessive bulk, surface, and interface recombination. In the present work, we propose a strategy to prepare a hematite (α-Fe2O3) photoanode consisting of hematite nanorods grown onto an iron oxide blocking layer. This blocking layer is formed from a sputter deposited thin metallic iron film on fluorine doped tin oxide (FTO) by using cyclic voltammetry to fully convert the film into an anodic oxide. In a second step, hematite nanorods (NR) are grown onto the layer using a hydrothermal approach. In this geometry, the hematite sub-layer works as a barrier for electron back diffusion (a blocking layer). This suppresses recombination, and the maximum of the incident photon to current efficiency is increased from 12% to 17%. Under AM 1.5 conditions, the photocurrent density reaches approximately 1.2 mA/cm2 at 1.5 V vs. RHE and the onset potential changes to 0.8 V vs. RHE (using a Zn-Co co-catalyst).
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17
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Kawde A, Annamalai A, Sellstedt A, Glatzel P, Wågberg T, Messinger J. A microstructured p-Si photocathode outcompetes Pt as a counter electrode to hematite in photoelectrochemical water splitting. Dalton Trans 2019; 48:1166-1170. [PMID: 30534760 DOI: 10.1039/c8dt03653e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we communicate about an Earth-abundant semiconductor photocathode (p-Si/TiO2/NiOx) as an alternative for the rare and expensive Pt as a counter electrode for overall photoelectrochemical water splitting. The proposed photoelectrochemical (PEC) water-splitting device mimics the "Z"-scheme observed in natural photosynthesis by combining two photoelectrodes in a parallel-illumination mode. A nearly 60% increase in the photocurrent density (Jph) for pristine α-Fe2O3 and a 77% increase in the applied bias photocurrent efficiency (ABPE) were achieved by replacing the conventionally used Pt cathode with an efficient, cost effective p-Si/TiO2/NiOx photocathode under parallel illumination. The resulting photocurrent density of 1.26 mA cm-2 at 1.23VRHE represents a new record performance for hydrothermally grown pristine α-Fe2O3 nanorod photoanodes in combination with a photocathode, which opens the prospect for further improvement by doping α-Fe2O3 or by its decoration with co-catalysts. Electrochemical impedance spectroscopy measurements suggest that this significant performance increase is due to the enhancement of the space-charge field in α-Fe2O3.
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Affiliation(s)
- Anurag Kawde
- Umeå University, Department of Chemistry, Sweden.
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18
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Zhu M, Dai Y, Wu Y, Liu K, Qi X, Sun Y. Bandgap control of α-Fe 2O 3 nanozymes and their superior visible light promoted peroxidase-like catalytic activity. NANOTECHNOLOGY 2018; 29:465704. [PMID: 30160242 DOI: 10.1088/1361-6528/aaddc2] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Iron oxide nanoparticles (NPs) possessing peroxidase-like catalytic activity have been widely explored in recent decades, owing to their high stability against harsh conditions, low cost, flexibility in structure design and composition, adjustable activities and excellent biocompatibility in comparison with natural enzymes. Recently, a lot of great achievements have been made in this field of iron oxide nanozymes, however, this research has now reached a bottleneck in that the maximum activity enhancement is difficult to achieve via a material design. Hence, in this work, visible light was introduced to improve the peroxidase-like activity of Fe2O3 NPs synthesized via a combination of electrospinning technology and hydrothermal reaction. Our results showed that with the assistance of visible light, Fe2O3 NPs exhibited at least 2.2-fold higher peroxidase activity than those tested under darkness, confirming the superiorly visible light promoted peroxidase-like catalytic activity of Fe2O3 NPs. Furthermore, the affinity and maximum reaction velocity of Fe2O3 nanoflowers (bandgap = 1.78 eV) towards 3,3',5,5'-tetramethylbenanozymeidine (TMB) were at least over 3.7 and 4.3 times greater than in Fe2O3 nanocubes (bandgap = 2.08 eV), suggesting that the reaction performance of semiconductors could be controlled by proper adjustment of the bandgap. Moreover, the Fe2O3 NPs were also successfully utilized to detect glucose. Herein, we believe that the present work exhibits a fascinating perspective for peroxidase-like catalytic fields.
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Affiliation(s)
- Mingyun Zhu
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing, Jiangsu 211189, People's Republic of China
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19
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Lucas M, Yeşilbaş M, Shchukarev A, Boily JF. X-ray Photoelectron Spectroscopy of Fast-Frozen Hematite Colloids in Aqueous Solutions. 6. Sodium Halide (F -, Cl -, Br -, I -) Ion Binding on Microparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:13497-13504. [PMID: 30336048 DOI: 10.1021/acs.langmuir.8b01507] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Electrolyte ion binding at mineral surfaces is central to the generation of surface charge and key to electric double-layer formation. X-ray photoelectron spectroscopy of fast-frozen (-170 °C) mineral wet pastes provides a means to study weakly bound electrolyte ions at the mineral/water interface. In this study, we build upon a series of articles devoted to ion binding at hematite (α-Fe2O3) particle surfaces to resolve the nature of sodium halide ion binding. Measurements on micron-sized hematite particles terminated by the charged and amphoteric (012) and the relatively uncharged (001) faces point to the formation of salt loadings of similar composition to those of cryosalts of NaCl, NaBr, NaI, and NaF. These coatings could be likened to those of the better-known hydrohalite (NaCl·2H2O) phase, one that typically forms under concentrated (≫0.1 M) aqueous solutions of NaCl under freezing conditions. As we have previously shown that these reaction products do not occur in nanosized hematite particles, our work points to the involvement of the basal (001) face and/or the juxtaposition of these faces in packed tabular microparticles of hematite (1-3 μm in width) in stabilizing these cryosalts. One possible formation pathway involves first-layer Na+ and Cl- ions serving as an anchoring layer for a topotactic-like growth of amorphous to low-crystalline salt hydrates at the (001) face. Thus, by contrasting reaction products of four sodium halides at surfaces of tabular microparticles of hematite, this work revealed the formation of cryosalt-like solids. The formation of such solids may have especially important ramifications to ice nucleation mechanisms in the atmosphere, as well as in saline permafrosts on Earth and on planet Mars where salt-laden mineral particles prevail.
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Affiliation(s)
- Marie Lucas
- Department of Chemistry , Umeå University , SE-901 87 Umeå , Sweden
| | - Merve Yeşilbaş
- Department of Chemistry , Umeå University , SE-901 87 Umeå , Sweden
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