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Wu H, Zhao Y, Wang J, Li X, Shih K, Li X, Liu W. Production of the C/TiO 2 composite with a high-performance electrochemical property from titanium-rich sludge via in-situ C coating. J Environ Sci (China) 2024; 137:131-143. [PMID: 37980002 DOI: 10.1016/j.jes.2023.02.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 02/18/2023] [Accepted: 02/23/2023] [Indexed: 11/20/2023]
Abstract
Resource recycling from waste-water and sludge is an important part of the 14th Five-Year Plan in China. The emerging titanium-based coagulants have drawn growing attentions due to their strong coagulation capability in water purification and value-added Ti-loaded sludge production. Management and recovery of the high value-added sludge into functional nanomaterials is highly significant for both sludge reduction and environmental remediation. The present study was carried out to investigate the recycle of the coagulated Ti-loaded sludge to produce functional C/TiO2 composites as the anode materials for lithium-ion batteries (LIBs). It is the first time that the application of the Ti-loaded wastewater sludge derived C/TiO2 was evaluated for LIBs. The experimental results showed that the carbon coating through in-situ carbonization of the sludge produced the C/TiO2 composites with a high specific surface area, stable structural integrity, and excellent electrochemical properties that would facilitate Li+ diffusion in long-term LIBs usage. The C/TiO2 composites calcinated from the polytitanium sulfate-coagulated sludge at 800°C (N2) exhibited the best electrochemical performance during the cycling tests (601 mAh/g at 100 mA/g after 200 cycles). The research work demonstrates the promising prospect of the recycle and value-added utilization of the Ti-loaded sludge in the production of high-performance C/TiO2 composites for energy storage applications. This study provides a new way for the management and reuse of Ti-loaded waste-sludge.
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Affiliation(s)
- Hualong Wu
- State Key Lab of Physical Chemistry of Solid Surface, Collaborative Innovation Center of Chemistry for Energy Materials, College of Materials, Xiamen University, Xiamen 361005, China
| | - Yanxia Zhao
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China.
| | - Jiexi Wang
- School of Metallurgy and Environment, Central South University, Changsha 410083, China
| | - Xiaoyan Li
- Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong, China; Institute of Environment and Ecology, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Kaimin Shih
- Department of Civil Engineering, The University of Hong Kong, Pokfulam, Hong Kong, China
| | - Xuguang Li
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China
| | - Wei Liu
- School of Water Conservancy and Environment, University of Jinan, Jinan 250022, China
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2
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Ali AM, El-Hosainy H, Alhassan IY, Al-Hajji LA, Ismail AA, Algarni H, El-Bery HM. Synthesis of mesoporous Ag/α-Fe 2O 3/TiO 2 heterostructures with enhanced and accelerated photo/-catalytic reduction of 4-nitrophenol. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:41405-41418. [PMID: 36633742 DOI: 10.1007/s11356-023-25228-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Accepted: 01/05/2023] [Indexed: 06/17/2023]
Abstract
4-Nitrophenol (4-NP) is reported to originate disadvantageous effects on the human body collected from industrial pollutants; therefore, the detoxification of 4-NP in aqueous contamination is strongly recommended. In this study, the heterojunction mesoporous α-Fe2O3/TiO2 modulated with diverse Ag percentages has been constructed via a sol-gel route in the occurrence of a soft template P123. The formation of biphasic crystalline TiO2 anatase and brookite phases has been successfully achieved with the average 10 nm particle sizes. The photo/-catalytic reduction of 4-NP has been performed utilizing NaBH4 as a reducing agent with and without visible illumination. All Ag/Fe2O3/TiO2 nanocomposites exhibited significantly higher photo/-catalytic reduction efficiency than pure Fe2O3, TiO2 NPs, and Fe2O3/TiO2 nanocomposite. 2.5% Ag/Fe2O3/TiO2 nanocomposite was considered the highest and superior photocatalytic reduction efficiency, and it almost achieved 98% after 9 min. Interestingly, the photocatalytic reduction of 4-NP was accelerated 9 times higher than the catalytic reduction over 2.5% Ag/Fe2O3/TiO2; its rate constant value was 709 and 706 times larger than pure TiO2 and Fe2O3 NPs, respectively. The enhanced photocatalytic reduction ability of Ag/Fe2O3/TiO2 nanocomposite might be referred to as significantly providing visible light absorption and a large surface area, and it can upgrade the effective separation and mobility of electron holes. The stability of the synthesized catalysts exhibited that the obtained catalysts can undergo a slight decrease in reduction efficiency after five successive cycles. This approach highlights a novel route for constructing ternary nanocomposite systems with high photo/-catalytic ability.
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Affiliation(s)
- Atif Mossad Ali
- Department of Physics, Faculty of Science, King Khalid University, Abha, Saudi Arabia
- Department of Physics, Faculty of Science, Assiut University, Asyut, 71516, Egypt
| | - Hamza El-Hosainy
- Institute of Nanoscience & Nanotechnology, Kafrelsheikh University, Kafr El-Sheikh, 33516, Egypt
| | - Iman Y Alhassan
- Laboratory Technology, Department College of Technological Studies (PAAET), Shuwaikh, Kuwait
| | - Latifa A Al-Hajji
- Nanotechnologyand Advanced Materials Program, Energy & Building Research Center, Kuwait Institute for Scientific Research (KISR), P.O. Box 24885, 13109, Safat, Kuwait
| | - Adel A Ismail
- Nanotechnologyand Advanced Materials Program, Energy & Building Research Center, Kuwait Institute for Scientific Research (KISR), P.O. Box 24885, 13109, Safat, Kuwait.
| | - Hamed Algarni
- Department of Physics, Faculty of Science, King Khalid University, Abha, Saudi Arabia
| | - Haitham M El-Bery
- Department of Chemistry, Faculty of Science, Assiut University, Asyut, 71516, Egypt
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3
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Jonidi Jafari A, Moslemzadeh M. Synthesis of Fe-Doped TiO2 for Photocatalytic Processes under UV-Visible Light: Effect of Preparation Methods on Crystal Size—A Systematic Review Study. COMMENT INORG CHEM 2020. [DOI: 10.1080/02603594.2020.1821674] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Ahmad Jonidi Jafari
- Research Center for Environmental Health Technology, Iran University of Medical Sciences, Tehran, Iran
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
| | - Mehrdad Moslemzadeh
- Department of Environmental Health Engineering, School of Public Health, Iran University of Medical Sciences, Tehran, Iran
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4
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Photocatalytic Hydrogen Production by Boron Modified TiO
2
/Carbon Nitride Heterojunctions. ChemCatChem 2019. [DOI: 10.1002/cctc.201901703] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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5
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Wu X, Zhu L, Zhu C, Wang C, Li Q. Catalytic Transformation of Bio-oil to Benzaldehyde and Benzoic Acid: An Approach for the Production of High-value Aromatic Bio-chemicals. CURRENT GREEN CHEMISTRY 2019. [DOI: 10.2174/2213346106666190830114619] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Benzaldehyde and benzoic acid are high-value aromatic chemicals and important intermediates
in chemical industry, and the catalytic conversion of biomass-based sources to these aromatic
chemicals is of great significance in both academic and industrial fields. This work demonstrated that
bio-oil was directionally converted into benzaldehyde and benzoic acid by three-step process under
atmospheric pressure and moderate temperatures. The process included the catalytic cracking of biooil
into aromatics over 1% Ga/HZSM-5 catalyst, followed by the dealkylation of heavier alkylaromatics
to toluene over Re/HY catalyst and the liquid-phase oxidation of toluene-rich aromatics to the targeted
chemicals over CoCl2/NHPI (CoCl2/N-Hydroxyphthalimide) catalyst. The production of benzaldehyde
and benzoic acid from the bio-oil-derived aromatics, with the overall selectivity of 86.8%, was
achieved using CoCl2/NHPI catalyst at 100 °C. Furthermore, adding a small amount of methanol into
the feed would efficiently suppress the coke formation, and thus, enhance the yield of aromatics. Potentially,
the novel synthesis route offers a green way for the production of higher value-added aromatic
chemicals using renewable and environmentally friendly biomass-based sources.
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Affiliation(s)
- Xiaoping Wu
- Department of Chemical Physics, Key Laboratory of Urban Pollutant Conversion, Chinese Academy of Sciences, Anhui Key Laboratory of Biomass Clean Energy, University of Science & Technology of China, Hefei 230026, China
| | - Lijuan Zhu
- Department of Chemical Physics, Key Laboratory of Urban Pollutant Conversion, Chinese Academy of Sciences, Anhui Key Laboratory of Biomass Clean Energy, University of Science & Technology of China, Hefei 230026, China
| | - Changhui Zhu
- Key Laboratory of Renewable Energy and Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Chenguang Wang
- Key Laboratory of Renewable Energy and Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Quanxin Li
- Department of Chemical Physics, Key Laboratory of Urban Pollutant Conversion, Chinese Academy of Sciences, Anhui Key Laboratory of Biomass Clean Energy, University of Science & Technology of China, Hefei 230026, China
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7
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Crake A, Christoforidis KC, Gregg A, Moss B, Kafizas A, Petit C. The Effect of Materials Architecture in TiO 2 /MOF Composites on CO 2 Photoreduction and Charge Transfer. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2019; 15:e1805473. [PMID: 30716205 DOI: 10.1002/smll.201805473] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2018] [Indexed: 06/09/2023]
Abstract
CO2 photoreduction to C1 /C1+ energized molecules is a key reaction of solar fuel technologies. Building heterojunctions can enhance photocatalysts performance, by facilitating charge transfer between two heterojunction phases. The material parameters that control this charge transfer remain unclear. Here, it is hypothesized that governing factors for CO2 photoreduction in gas phase are: i) a large porosity to accumulate CO2 molecules close to catalytic sites and ii) a high number of "points of contact" between the heterojunction components to enhance charge transfer. The former requirement can be met by using porous materials; the latter requirement by controlling the morphology of the heterojunction components. Hence, composites of titanium oxide or titanate and metal-organic framework (MOF), a highly porous material, are built. TiO2 or titanate nanofibers are synthesized and MOF particles are grown on the fibers. All composites produce CO under UV-vis light, using H2 as reducing agent. They are more active than their component materials, e.g., ≈9 times more active than titanate. The controlled composites morphology is confirmed and transient absorption spectroscopy highlights charge transfer between the composite components. It is demonstrated that electrons transfer from TiO2 into the MOF, and holes from the MOF into TiO2 , as the MOF induces band bending in TiO2 .
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Affiliation(s)
- Angus Crake
- Barrer Centre, Department of Chemical Engineering, Imperial College London, South Kensington Campus, SW7 2AZ, London, UK
| | - Konstantinos C Christoforidis
- Barrer Centre, Department of Chemical Engineering, Imperial College London, South Kensington Campus, SW7 2AZ, London, UK
| | - Aoife Gregg
- Barrer Centre, Department of Chemical Engineering, Imperial College London, South Kensington Campus, SW7 2AZ, London, UK
| | - Benjamin Moss
- Department of Chemistry, Imperial College London, South Kensington Campus, SW7 2AZ, London, UK
| | - Andreas Kafizas
- Department of Chemistry, Imperial College London, South Kensington Campus, SW7 2AZ, London, UK
| | - Camille Petit
- Barrer Centre, Department of Chemical Engineering, Imperial College London, South Kensington Campus, SW7 2AZ, London, UK
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8
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Hydrophobicity and Photocatalytic Activity of a Wood Surface Coated with a Fe 3+-Doped SiO₂/TiO₂ Film. MATERIALS 2018; 11:ma11122594. [PMID: 30572674 PMCID: PMC6316678 DOI: 10.3390/ma11122594] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 12/16/2018] [Accepted: 12/17/2018] [Indexed: 11/17/2022]
Abstract
A Fe3+-doped SiO₂/TiO₂ composite film (Fe3+-doped STCF) was prepared on a wood surface via a sol⁻gel method to improve its photocatalytic activity and hydrophobicity. The structure of the composite film was analyzed by Fourier Transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The photocatalytic activity toward degradation of methyl orange and its hydrophobic nature were investigated. The results showed that the composite film was anatase TiO₂ crystal form, and the addition of Fe3+ ions and SiO₂ enhanced the diffraction peaks for the anatase crystal form. The photocatalytic activity of the wood coated with the composite film was enhanced. The highest degradation percentage was at 1 wt % Fe3+ (40.37%), and the degradation ability of the wood towards methyl orange solution was further improved under acidic conditions. In addition, the composite film was hydrophobic, and the hydrophobic property was enhanced as the immersion time in the sol increased. The wood surface coated with Fe3+-doped STCF exhibited strong hydrophobicity and photocatalytic activity, which could effectively prevent moisture from adhering to the surface and degrade organic pollutants; thus, the modified wood surface had good self-cleaning function.
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9
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Christoforidis KC, Fornasiero P. Photocatalysis for Hydrogen Production and CO2Reduction: The Case of Copper‐Catalysts. ChemCatChem 2018. [DOI: 10.1002/cctc.201801198] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
| | - Paolo Fornasiero
- Department of Chemical and Pharmaceutical Sciences ICCOM-CNR and INSTMUniversity of Trieste Via L. Giorgieri 1 34127 Trieste Italy
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10
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Sakaki K, Kim H, Machida A, Watanuki T, Katayama Y, Nakamura Y. Development of an in situ synchrotron X-ray total scattering setup under pressurized hydrogen gas. J Appl Crystallogr 2018. [DOI: 10.1107/s1600576718005101] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
This article describes the development of an in situ gas-loading sample holder for synchrotron X-ray total scattering experiments, particularly for hydrogen storage materials, designed to collect diffraction and pair distribution function (PDF) data under pressurized hydrogen gas. A polyimide capillary with a diameter and thickness of 1.4 and 0.06 mm, respectively, connected with commercially available Swagelok fittings was used as an in situ sample holder. Leakage tests confirmed that this sample holder allows 3 MPa of hydrogen gas pressure and 393 K to be achieved without leakage. Using the developed in situ sample holder, significant background and Bragg peaks from the sample holder were not observed in the X-ray diffraction patterns and their signal-to-noise ratios were sufficiently good. The PDF patterns showed sharp peaks in the r range up to 100 Å. The results of Rietveld and PDF refinements of Ni are consistent with those obtained using a polyimide capillary (1.0 mm diameter and 0.04 mm thickness) that has been used for ex situ experiments. In addition, in situ synchrotron X-ray total scattering experiments under pressurized hydrogen gas up to 1 MPa were successfully demonstrated for LaNi4.6Cu.
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11
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Lee R, Kumaresan Y, Yoon SY, Um SH, Kwon IK, Jung GY. Design of gold nanoparticles-decorated SiO2@TiO2 core/shell nanostructures for visible light-activated photocatalysis. RSC Adv 2017. [DOI: 10.1039/c6ra27591e] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
In this study, we designed core/shell nanostructures (CSNs) of silicon dioxide (SiO2)/titanium dioxide (TiO2), which were decorated with gold (Au) nanoparticles (NPs), to activate the visible light-driven photocatalytic reaction.
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Affiliation(s)
- Ryeri Lee
- School of Materials Science and Engineering
- Gwangju Institute of Science and Technology (GIST)
- Gwangju 61005
- Republic of Korea
| | - Yogeenth Kumaresan
- School of Materials Science and Engineering
- Gwangju Institute of Science and Technology (GIST)
- Gwangju 61005
- Republic of Korea
| | - Sei Young Yoon
- Department of Cosmetic Science
- Daejeon Health Institute of Technology
- Daejeon
- Republic of Korea
| | - Soong Ho Um
- Department of Chemical Engineering
- SKKU Advanced Institute of Nanotechnology (SAINT)
- Sungkyunkwan University
- Suwon
- Republic of Korea
| | - Il Keun Kwon
- Department of Maxillofacial Biomedical Engineering
- Institute of Oral Biology
- School of Dentistry
- Kyung Hee University
- Seoul
| | - Gun Young Jung
- School of Materials Science and Engineering
- Gwangju Institute of Science and Technology (GIST)
- Gwangju 61005
- Republic of Korea
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12
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Kenens B, Chamtouri M, Aubert R, Miyakawa K, Hayasaka Y, Naiki H, Watanabe H, Inose T, Fujita Y, Lu G, Masuhara A, Uji-i H. Solvent-induced improvement of Au photo-deposition and resulting photo-catalytic efficiency of Au/TiO2. RSC Adv 2016. [DOI: 10.1039/c6ra19372b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Metal nanoparticle photo-deposition on TiO2enhances the semiconductor catalytic activity.
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Affiliation(s)
- Bart Kenens
- Department of Chemistry
- KU Leuven
- B-3001 Heverlee
- Belgium
| | | | - Remko Aubert
- Department of Chemistry
- KU Leuven
- B-3001 Heverlee
- Belgium
| | - Kana Miyakawa
- Graduate School of Science and Engineering
- Yamagata University
- Yonezawa
- Japan
- Kwansei Gakuin University
| | - Yasufumi Hayasaka
- Graduate School of Science and Engineering
- Yamagata University
- Yonezawa
- Japan
- Kwansei Gakuin University
| | - Hiroyuki Naiki
- Department of Chemistry
- KU Leuven
- B-3001 Heverlee
- Belgium
- Kwansei Gakuin University
| | - Hiroki Watanabe
- Graduate School of Science and Engineering
- Yamagata University
- Yonezawa
- Japan
- Kwansei Gakuin University
| | | | | | - Gang Lu
- Department of Chemistry
- KU Leuven
- B-3001 Heverlee
- Belgium
| | - Akito Masuhara
- Graduate School of Science and Engineering
- Yamagata University
- Yonezawa
- Japan
- Kwansei Gakuin University
| | - Hiroshi Uji-i
- Department of Chemistry
- KU Leuven
- B-3001 Heverlee
- Belgium
- RIES
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13
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Christoforidis KC, Fernández-García M. Photoactivity and charge trapping sites in copper and vanadium doped anatase TiO2 nano-materials. Catal Sci Technol 2016. [DOI: 10.1039/c5cy00929d] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Isolated dopant species and metal cluster formation regulate the photoactivity and charge carrier formation via accepting e− and eliminating Ti3+ states.
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14
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Christoforidis KC, Melchionna M, Montini T, Papoulis D, Stathatos E, Zafeiratos S, Kordouli E, Fornasiero P. Solar and visible light photocatalytic enhancement of halloysite nanotubes/g-C3N4 heteroarchitectures. RSC Adv 2016. [DOI: 10.1039/c6ra15581b] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The charged surface of HNTs allows efficient charge separation and increased pollutant adsorption, enhancing the overall photocatalytic performance of the HNTs/g-C3N4 heteroarchitectures.
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Affiliation(s)
- K. C. Christoforidis
- Department of Chemical and Pharmaceutical Sciences
- ICCOM-CNR Trieste Research Unit and INSTM Research Unit
- University of Trieste
- 34127 Trieste
- Italy
| | - M. Melchionna
- Department of Chemical and Pharmaceutical Sciences
- ICCOM-CNR Trieste Research Unit and INSTM Research Unit
- University of Trieste
- 34127 Trieste
- Italy
| | - T. Montini
- Department of Chemical and Pharmaceutical Sciences
- ICCOM-CNR Trieste Research Unit and INSTM Research Unit
- University of Trieste
- 34127 Trieste
- Italy
| | - D. Papoulis
- Department of Geology
- University of Patras
- 26504 Patras
- Greece
| | - E. Stathatos
- Department of Electrical Engineering
- Technological Educational Institute (TEI) of Western Greece
- 26334 Patras
- Greece
| | - S. Zafeiratos
- Institut de Chimie et Procédés Pour l'Energie
- l'Environnement et la Santé
- (ICPEES) ECPM
- University of Strasbourg
- 67087 Strasbourg
| | - E. Kordouli
- Department of Chemistry
- University of Patras
- 26504 Patras
- Greece
| | - P. Fornasiero
- Department of Chemical and Pharmaceutical Sciences
- ICCOM-CNR Trieste Research Unit and INSTM Research Unit
- University of Trieste
- 34127 Trieste
- Italy
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15
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Christoforidis KC, Sengele A, Keller V, Keller N. Single-Step Synthesis of SnS₂ Nanosheet-Decorated TiO₂ Anatase Nanofibers as Efficient Photocatalysts for the Degradation of Gas-Phase Diethylsulfide. ACS APPLIED MATERIALS & INTERFACES 2015; 7:19324-34. [PMID: 26262595 DOI: 10.1021/acsami.5b05370] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We report on a facile one-step soft hydrothermal process for synthesizing 1D anatase TiO2 nanofibers decorated with ultrathin SnS2 nanosheets. H-titanate nanofibers were used as preshaped Ti precursor. Under controlled conditions, the H-titanate structure was transformed into anatase maintaining the fibril morphology, while at the same time SnS2 nanosheets were grown in situ on the surface of the nanofibers. The successful formation of SnS2 nanosheets on the TiO2 nanofibers was confirmed by high-resolution TEM, and together with XPS spectroscopy, the tight interface formed between the SnS2 and the anatase TiO2 nanofibers was verified. The 1D SnS2/TiO2 hierarchical nanostructures with semiconductor heterojunction were proven to be very efficient under artificial solar irradiation in the photocatalytic degradation of gaseous diethylsulfide as simulant for live yperite chemical warfare agent as well as model substrate for malodorous organosulfide volatile organic compounds. SnS2 did not operate as a visible light sensitizer for TiO2 but rather as an oxidizing agent and charge-carrier separator. The semiconductor ratio in the heterostructure controlled the photoactivity. Samples with no or high content of SnS2 were less active than those with moderate SnS2 content. Enhanced reactivity was ascribed to an efficient separation of the photogenerated charge carriers driven by the differences in band edge positions and favored by the tight interface within the coupled heterostructure.
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Affiliation(s)
- Konstantinos C Christoforidis
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), CNRS, University of Strasbourg , 25 rue Becquerel, 67087 Strasbourg, France
| | - Armelle Sengele
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), CNRS, University of Strasbourg , 25 rue Becquerel, 67087 Strasbourg, France
| | - Valérie Keller
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), CNRS, University of Strasbourg , 25 rue Becquerel, 67087 Strasbourg, France
| | - Nicolas Keller
- Institut de Chimie et Procédés pour l'Energie, l'Environnement et la Santé (ICPEES), CNRS, University of Strasbourg , 25 rue Becquerel, 67087 Strasbourg, France
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16
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Hu Y, Chen G, Li C, Yu Y, Sun J, Dong H. Improved light absorption and photocatalytic activity of Zn,N-TiO2−x rich in oxygen vacancies synthesized by nitridation and hydrogenation. NEW J CHEM 2015. [DOI: 10.1039/c4nj02132k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Compared with N-TiO2 and Zn,N-TiO2 samples, Zn,N-TiO2−x rich in oxygen vacancies demonstrates high photocatalytic activity.
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Affiliation(s)
- Yidong Hu
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Gang Chen
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Chunmei Li
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Yaoguang Yu
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Jingxue Sun
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
| | - Hongjun Dong
- Department of Chemistry
- Harbin Institute of Technology
- Harbin 150001
- P. R. China
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17
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Kapilashrami M, Zhang Y, Liu YS, Hagfeldt A, Guo J. Probing the Optical Property and Electronic Structure of TiO2 Nanomaterials for Renewable Energy Applications. Chem Rev 2014; 114:9662-707. [DOI: 10.1021/cr5000893] [Citation(s) in RCA: 379] [Impact Index Per Article: 37.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Mukes Kapilashrami
- Advanced
Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Yanfeng Zhang
- College
of Chemistry and Material Science, Hebei Normal University, Shijiazhuang, Hebei 050024, People’s Republic of China
| | - Yi-Sheng Liu
- Advanced
Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Anders Hagfeldt
- Physical
Chemistry, Department of Chemistry−Ångström Laboratory, Uppsala University, 751 20 Uppsala, Sweden
| | - Jinghua Guo
- Advanced
Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- Department
of Chemistry and Biochemistry, University of California, Santa Cruz, California 95064, United States
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Figueroa SJA, Gibson D, Mairs T, Pasternak S, Newton MA, Di Michiel M, Andrieux J, Christoforidis KC, Iglesias-Juez A, Fernández-García M, Prestipino C. Innovative insights in a plug flow microreactor foroperandoX-ray studies. J Appl Crystallogr 2013. [DOI: 10.1107/s0021889813018839] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Different solutions have been proposed over the years to optimize control of the temperature and atmosphere over a catalyst in order to reach an ideal reactor behavior. Here, a new innovative solution which aims to minimize temperature gradients along the catalyst bed is demonstrated. This was attained by focusing the infrared radiation generated from the heating elements onto the catalyst bed with the aid of an aluminium shield. This method yields a ∼0.13 K mm−1axial temperature gradient ranging from 960 to 1173 K. With the selection of appropriate capillaries, pressures of 20 bar (2 MPa) can be attained.
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