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Yuan M, Suriyaprakash J, Shan L, Xu H, Li X, Wu H, Ding G, Shi Z, Dong L, Zhang FM. Carrier confinement activated explicit solvent dynamic of CdS/BiVO 4/H 2O and optimized photocatalytic hydrogen evolution performances. J Colloid Interface Sci 2024; 658:571-583. [PMID: 38134666 DOI: 10.1016/j.jcis.2023.12.093] [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: 11/08/2023] [Revised: 12/09/2023] [Accepted: 12/14/2023] [Indexed: 12/24/2023]
Abstract
Herein, using an electrophoretic deposition strategy, a S-scheme CdS (cubic)/BiVO4 (monoclinic) heterostructured photocatalyst is fabricated. The as-synthesized photocatalysts exhibit high carrier separation efficiency, prominent hydrogen evolution ability and high stability. The results of the detailed density functional theory (DFT) prove that the photogenerated electrons and holes are located in BiVO4 and CdS components, respectively. Besides, an explicit solvent model based on the electron-enriched region in CdS/BiVO4 heterojunction is designed deliberately to investigate the solid/liquid interface issues. Intriguing findings demonstrate that the surface hydrogen diffusing rate in CdS/BiVO4/H2O is faster than that of BiVO4/H2O and is highly associated with the electron-enrich effect, which has a greater capacity to promote water decomposition, the possibility of proton collision and photocatalytic hydrogen evolution. Notably, the H p orbital can participate in the electron-enrich effect during solvation, thus reforming the orbital energy level and activating the HER of the BiVO4 component in the CdS/BiVO4 system.
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Affiliation(s)
- Mingqi Yuan
- Heilongjiang Provincial Key Laboratory of CO(2) Resource Utilization and Energy Catalytic Materials, School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, China
| | - Jagadeesh Suriyaprakash
- Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
| | - Lianwei Shan
- Heilongjiang Provincial Key Laboratory of CO(2) Resource Utilization and Energy Catalytic Materials, School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, China.
| | - Huanyan Xu
- Heilongjiang Provincial Key Laboratory of CO(2) Resource Utilization and Energy Catalytic Materials, School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, China.
| | - Xuejiao Li
- Heilongjiang Provincial Key Laboratory of CO(2) Resource Utilization and Energy Catalytic Materials, School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, China
| | - Haitao Wu
- School of Environmental and Material Engineering, Yantai University, Yantai, 264005, Shandong, China.
| | - Guodao Ding
- Heilongjiang Provincial Key Laboratory of CO(2) Resource Utilization and Energy Catalytic Materials, School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, China
| | - Ziqi Shi
- Heilongjiang Provincial Key Laboratory of CO(2) Resource Utilization and Energy Catalytic Materials, School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, China
| | - Limin Dong
- Heilongjiang Provincial Key Laboratory of CO(2) Resource Utilization and Energy Catalytic Materials, School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, China.
| | - Feng Ming Zhang
- Heilongjiang Provincial Key Laboratory of CO(2) Resource Utilization and Energy Catalytic Materials, School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, China
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Hemmatpour P, Nezamzadeh-Ejhieh A. A Z-scheme CdS/BiVO 4 photocatalysis towards Eriochrome black T: An experimental design and mechanism study. CHEMOSPHERE 2022; 307:135925. [PMID: 35952786 DOI: 10.1016/j.chemosphere.2022.135925] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 07/24/2022] [Accepted: 07/31/2022] [Indexed: 06/15/2023]
Abstract
The synergistic photocatalytic activity was obtained when CdS and BiVO4 nanoparticles (NPs) were coupled. The samples were characterized by XRD, FTIR, SEM-EDX, and UV-DRS techniques, and their pHpzc was also estimated. The crystallite size of the coupled sample was estimated at 37.3 and 12.5 nm by the Scherrer and Williamson-Hall equations, respectively. The band gaps and the potential positions of VB and CB levels of the semiconductors used were determined. The highest boosted photocatalytic activity was obtained when the CdS: BiVO4 mole ratio was 1:1. RSM studied the simultaneous interactions between the selected variables, and the model F-value of 110.61> F0.05, 14, 13 = 2.4 accompanied by the LOF F-value of 5.20 < F0.05, 10, 3 = 8.79 confirm the model significance. The correlation coefficients of R2 = 0.9861, the adjusted R2 = 0.9710, and the predicted R2 = 0.9417, also establish a satisfactory model for processing the experimental data. In the scavenging agent study, photodegradation mechanisms were suggested; among them, the direct Z-scheme mechanism is more favorable for illustrating the EBT-photodegradation by the binary CdS-BiVO4 photocatalyst. The proposed system, especially the direct Z-scheme mechanism, is suitable as a potential hydrogen production system.
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Affiliation(s)
- Pooneh Hemmatpour
- Department of Chemistry, Shahreza Branch, Islamic Azad University, P. O. Box, 311-86145, Shahreza, Isfahan, Islamic Republic of Iran.
| | - Alireza Nezamzadeh-Ejhieh
- Department of Chemistry, Shahreza Branch, Islamic Azad University, P. O. Box, 311-86145, Shahreza, Isfahan, Islamic Republic of Iran.
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Zhao S, Song S, You Y, Zhang Y, Luo W, Han K, Ding T, Tian Y, Li X. Tuning redox ability of Zn3In2S6 with surfactant modification for highly efficient and selective photocatalytic C-C coupling. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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