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Zhang M, Xue H, Han X, Zhang Z, Jiang Y, Deng Y, Hu W. Accelerate charge separation in Cu 2O/MoO 2 photocathode for photoelectrocatalytic hydrogen evolution. J Colloid Interface Sci 2023; 650:284-293. [PMID: 37413862 DOI: 10.1016/j.jcis.2023.06.203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2023] [Revised: 06/23/2023] [Accepted: 06/30/2023] [Indexed: 07/08/2023]
Abstract
Photoelectrocatalyzing water reduction is a potential approach to building a green and sustainable society. As a benchmark photocathode, Cu2O receives much attention but faces serious charge recombination and photocorrosion. This work prepared an excellent Cu2O/MoO2 photocathode via in situ electrodeposition. A systematical study of theory and experiment demonstrates that MoO2 not only effectively passivates the surface state of Cu2O as well as accelerates reaction kinetics as a cocatalyst, but also promotes the directional migration and separation of photogenerated charge. As expected, the constructed photocathode exhibits a highly enhanced photocurrent density and an appealing energy transformation efficacy. Importantly, MoO2 can inhibit the reduction of Cu+ in Cu2O via a formed internal electric field and shows excellent photoelectrochemical stability. These findings pave the way to designing a high-activity photocathode with high stability.
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Affiliation(s)
- Mengmeng Zhang
- State Key Laboratory of Separation Membrane and Membrane Processes, Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage, School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Hui Xue
- School of Mechanical Engineering, Tiangong University, Tianjin 300387, China
| | - Xiaopeng Han
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), Tianjin University, Tianjin 300350, China
| | - Zhijia Zhang
- State Key Laboratory of Separation Membrane and Membrane Processes, Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage, School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Yong Jiang
- State Key Laboratory of Separation Membrane and Membrane Processes, Tianjin Municipal Key Laboratory of Advanced Fiber and Energy Storage, School of Materials Science and Engineering, Tiangong University, Tianjin 300387, China.
| | - Yida Deng
- State Key Laboratory of Marine Resource Utilization in South China Sea, School of Materials Science and Engineering, Hainan University, Haikou 570228, China.
| | - Wenbin Hu
- School of Materials Science and Engineering, Tianjin Key Laboratory of Composite and Functional Materials, Key Laboratory of Advanced Ceramics and Machining Technology (Ministry of Education), Tianjin University, Tianjin 300350, China
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2
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Qi Z, Chen J, Li Q, Wang N, Carabineiro SAC, Lv K. Increasing the Photocatalytic Hydrogen Generation Activity of CdS Nanorods by Introducing Interfacial and Polarization Electric Fields. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2023; 19:e2303318. [PMID: 37475483 DOI: 10.1002/smll.202303318] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 06/27/2023] [Indexed: 07/22/2023]
Abstract
Cadmium sulfide (CdS) is a photocatalyst widely used for efficient H2 production under visible light irradiation, due to its narrow bandgap and suitable conduction band position. However, the fast recombination of carriers results in their low utilization. In order to improve photocatalytic hydrogen production, it reports the successful introduction of metallic Cd and S vacancies on CdS nanorods (CdS NRs) by a facile in situ chemical reduction method, using a thermal treatment process. This procedure generates interfacial and polarization electric fields, that significantly improve the photocatalytic hydrogen production performance of CdS NRs in sodium sulfide and sodium sulfite aqueous solutions, under visible light irradiation (λ >420 nm). The introduction of these electric fields is believed to improve charge separation and facilitate faster interfacial charge migration, resulting in a significantly optimized catalyst, with a photocatalytic hydrogen evolution rate of up to 10.6 mmol-1 g-1 h-1 with apparent quantum efficiency (AQE) of 12.1% (420 nm), which is 8.5 times higher than that of CdS. This work provides a useful method to introduce metallic and S vacancies on metal sulfide photocatalysts to build local polarization and interfacial electric fields for high-performance photocatalytic H2 production.
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Affiliation(s)
- Zheng Qi
- College of Resources and Environment, South-Central Minzu University, Wuhan, 430074, P. R. China
| | - Jinbao Chen
- College of Resources and Environment, South-Central Minzu University, Wuhan, 430074, P. R. China
| | - Qin Li
- College of Resources and Environment, South-Central Minzu University, Wuhan, 430074, P. R. China
| | - Ning Wang
- Faculty of Environment and Life, Beijing University of Technology, Beijing, 100124, P. R. China
| | - Sónia A C Carabineiro
- Department of Chemistry, NOVA School of Science and Technology, Universidade NOVA de Lisboa, Caparica, 2829-516, Portugal
| | - Kangle Lv
- College of Resources and Environment, South-Central Minzu University, Wuhan, 430074, P. R. China
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3
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Photoelectrocatalysis for high-value-added chemicals production. CHINESE JOURNAL OF CATALYSIS 2022. [DOI: 10.1016/s1872-2067(21)63923-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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4
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Xu X, Su Y, Dong Y, Luo X, Wang S, Zhou W, Li R, Homewood KP, Xia X, Gao Y, Chen X. Designing and fabricating a CdS QDs/Bi 2MoO 6 monolayer S-scheme heterojunction for highly efficient photocatalytic C 2H 4 degradation under visible light. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127685. [PMID: 34799172 DOI: 10.1016/j.jhazmat.2021.127685] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 10/28/2021] [Accepted: 10/30/2021] [Indexed: 06/13/2023]
Abstract
Achieving efficient photocatalytic degradation of atmospheric volatile organic compounds (VOCs) under sun-light is still a significant challenge for environmental protection. The S-scheme heterojunction with its unique charge migration route, high charge separation rate and strong redox ability, has great potential. However, how to regulate interfacial charge transfer of the S-scheme heterojunction is of significant importance. Here, density functional theory (DFT) calculations were first conducted and predicted that an S-scheme heterojunction could be formed in the CdS quantum dots/Bi2MoO6 monolayer system. Subsequently, this novel heterojunction is constructed by in-situ hydrothermal synthesis of CdS quantum dots on monolayer Bi2MoO6. Under visible-light, this novel S-scheme system gives a high-efficiency photocatalytic degradation rate (6.04 × 10-2 min-1) towards C2H4, which is 30.3 times higher than that of pure CdS (1.99 × 10-3 min-1) and 41.7 times higher than pure Bi2MoO6 (1.45 × 10-3 min-1). Strong evidence for the S-scheme charge transfer path is provided by in-situ XPS, PL, TRPL and EPR.
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Affiliation(s)
- Xinyue Xu
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China
| | - Yanghang Su
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China
| | - Yuanpeng Dong
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China
| | - Xiao Luo
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China; School of Sciences, Hubei University of Automotive Technology, Shiyan 442002, China
| | - Shihao Wang
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China
| | - Wenyu Zhou
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China
| | - Rong Li
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China; State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou 350002, China.
| | - Kevin Peter Homewood
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China
| | - Xiaohong Xia
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China
| | - Yun Gao
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China.
| | - Xuxing Chen
- Ministry-of-Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science & Engineering, Hubei University, Wuhan 430062, China.
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Zhang Y, Zhou W, Wang J, Jia L, Liu L, Tan X, Yu T, Ye J. Hydrated electrons mediated in-situ construction of cubic phase CdS/Cd thin layer on a millimeter-scale support for photocatalytic hydrogen evolution. J Colloid Interface Sci 2021; 607:769-781. [PMID: 34536934 DOI: 10.1016/j.jcis.2021.09.039] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2021] [Revised: 09/04/2021] [Accepted: 09/06/2021] [Indexed: 12/14/2022]
Abstract
In this study, non-noble metal Cd decorated cubic phase CdS (CdS/Cd) thin layer on a millimeter-scale chitosan-Mg(OH)2 xerogel beads (CMB) were elaborately designed and successfully synthesized via facile hydrated electrons (eaq•-) assistant strategy. The in-situ formation of metallic Cd was driven by eaq•- generated from UV/Na2SO3 process. Owing to metallic Cd, CMB@CdS/Cd exhibited better visible-light absorption ability and more efficient separation capability for photo-induced carriers, its hydrogen production efficiency was about threefold improved compared to CMB@CdS. Both characterization methods and density functional theory calculations determined a built-in electric field from metallic Cd to CdS and Ohmic-contact between Cd and CdS, which largely promoted the carriers transfer efficiency. Moreover, the introduction of metallic Cd on the CdS could reduce the ΔGH*, thus greatly boosting the photocatalytic hydrogen production efficiency. This work provides a simple and green approach to construct metallic Cd coupled semiconductor to achieve efficient photocatalytic applications.
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Affiliation(s)
- Yizhong Zhang
- School of Environmental Science and Engineering, Tianjin University, No. 135 Yaguan Road, Jinnan District, Tianjin 300350, People's Republic of China
| | - Wei Zhou
- School of Science, Tianjin University, No. 135 Yaguan Road, Jinnan District, Tianjin 300350, People's Republic of China
| | - Junyan Wang
- School of Environmental Science and Engineering, Tianjin University, No. 135 Yaguan Road, Jinnan District, Tianjin 300350, People's Republic of China
| | - Lixia Jia
- School of Environmental Science and Engineering, Tianjin University, No. 135 Yaguan Road, Jinnan District, Tianjin 300350, People's Republic of China
| | - Lequan Liu
- TJU-NIMS International Collaboration Laboratory, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, People's Republic of China
| | - Xin Tan
- School of Environmental Science and Engineering, Tianjin University, No. 135 Yaguan Road, Jinnan District, Tianjin 300350, People's Republic of China; School of Science, Tibet University, No. 36 Jiangsu Road, Lhasa 850000, People's Republic of China
| | - Tao Yu
- School of Chemical Engineering and Technology, Tianjin University, No. 135 Yaguan Road, Jinnan District, Tianjin 300350, People's Republic of China; TJU-NIMS International Collaboration Laboratory, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, People's Republic of China.
| | - Jinhua Ye
- TJU-NIMS International Collaboration Laboratory, Tianjin University, No. 92 Weijin Road, Nankai District, Tianjin 300072, People's Republic of China; International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
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Chen D, Zhang Y, Wang D, Wang W, Xu Y, Qian G. Al‐Incorporated Mesoporous Silica Supported ZnFe
2
O
4
for Photocatalytic Hydrogen Evolution. ChemistrySelect 2021. [DOI: 10.1002/slct.202102163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Dan Chen
- School of Environmental and Chemical Engineering Shanghai University No. 99 Shangda Road Shanghai 200444 China
| | - Yingying Zhang
- School of Environmental and Chemical Engineering Shanghai University No. 99 Shangda Road Shanghai 200444 China
| | - Daoyuan Wang
- School of Environmental and Chemical Engineering Shanghai University No. 99 Shangda Road Shanghai 200444 China
| | - Weide Wang
- Department of Marine Biochemistry Shandong Industrial Technical School No.6789, West Ring Road Weifang 261053 China
| | - Yao Xu
- School of Environmental and Chemical Engineering Shanghai University No. 99 Shangda Road Shanghai 200444 China
| | - Guangren Qian
- School of Environmental and Chemical Engineering Shanghai University No. 99 Shangda Road Shanghai 200444 China
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Zhou X, Zhao X, Gu S, Xie F, Wang X, Tang Z. Sulfur doped MoO 2 hollow nanospheres as a highly sensitive SERS substrate for multiple detections of organic pollutants. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:2679-2687. [PMID: 34036972 DOI: 10.1039/d1ay00502b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The residual organic pollutants in the environment do great harm to the human body and ecological environment. The surface-enhanced Raman scattering (SERS) technique has the characteristics of a simple pretreatment method, rapid detection, high sensitivity, high specificity and great stability in the detection of organic pollutants. In this study, sulfur-doped MoO2 nanospheres (S-MoO2) with a hollow structure were synthesized by a simple hydrothermal reduction of MoO3 using ethanol as a reductant and thiourea as a dopant source. Profiting from the S atom doping, MoO2 manifests high SERS sensitivity to model organic pollutants such as rhodamine B (RhB), rhodamine 6G (R6G) and methylene blue (MB) with detection limits as low as 10-9, 10-10 and 10-8 M, respectively. A maximum enhancement factor (EF) of 6.2 × 107 is obtained with R6G molecules on S-MoO2 (2 wt%). Based on the experimental results and theoretical calculations, the high SERS sensitivity can be attributed to the enhanced plasmonic effects of MoO2 due to the electron-rich S atom doping, which lead to the strong electromagnetic coupling between substrates and target molecules. This study provides a new method for enhancing the SERS performance of MoO2 and this method may also be applicable to other non-noble metal semiconductors.
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Affiliation(s)
- Xiaoyu Zhou
- School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei, Anhui 230601, China.
| | - Xiaoli Zhao
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
| | - Shuo Gu
- School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei, Anhui 230601, China.
| | - Fazhi Xie
- School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei, Anhui 230601, China.
| | - Xiufang Wang
- School of Materials and Chemical Engineering, Anhui Jianzhu University, Hefei, Anhui 230601, China.
| | - Zhi Tang
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
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