期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 24, 页码 20458-20466出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b04080
关键词
CdS; WS2; two dimerisional hetemstructure; photocatalytic H-2 evolution; charge separation
资金
- Cooperative Research Program of Network Joint Research Center for Materials and Devices, Osaka University
- Innovative Project for Advanced Instruments, Renovation Center of Instruments for Science Education and Technology, Osaka University
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of the Japanese Government [25220806]
- National Natural Science Foundation of China [51373111]
- Suzhou Industry [SYG201636]
- project of scientific and technologic infrastructure of Suzhou [SZS201708]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
Efficient Efiicient water splitting for H-2 evolution sender visible light irradiation has attracted more attention for solving the global environmental and energy issues, but it is still a major, challenge to develop an earth-abundant and effluent photocatalyst. Herein, we report two-dimensional (2D))/2D heterostructured CdS/WS2, (CdS/WS2), composed of nano sheet CdS (CdS) and nanosheet WS2 (WS2), as an efficient photocatalyst for H-2 evolution. As a noble metal-free visible light-driven catalyst for H-2, evolution, CdS/WS2 with 10 wt % WS2 exhibited the largest H-2 evolution rate of 14.1 mmol g(-1) h(-1) under visible light,irradiation to be 8 times larger than that if pure Cds. The lifetime and dynamics of photogenerated electrons were evaluated by femtosecond time-resolved diffuse reflectance spectroscopy, indicating that WS2 works as an electron-trapping site and a cocatalyst to cause H-2 evolution under visible light irradiation. This work suggests that Cds/Ws(2) has great potential as a low-cost and highly efficient photocatalyst for water splitting.
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