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- Title
Efficient Visible-Light Driven Photocatalytic Hydrogen Production by Z-Scheme ZnWO 4 /Mn 0.5 Cd 0.5 S Nanocomposite without Precious Metal Cocatalyst.
- Authors
Ma, Tingting; Li, Zhen; Wang, Gan; Zhang, Jinfeng; Wang, Zhenghua
- Abstract
How to restrain the recombination of photogenerated electrons and holes is still very important for photocatalytic hydrogen production. Herein, Z-scheme ZnWO4/Mn0.5Cd0.5S (ZWMCS) nanocomposites are prepared and are applied as visible-light driven precious metal cocatalyst free photocatalyst for hydrogen generation. The ZnWO4/Mn0.5Cd0.5S nanocomposites with 30 wt% ZnWO4 (ZWMCS-2) can reach a photocatalytic hydrogen evolution rate of 3.36 mmol g−1 h−1, which is much higher than that of single ZnWO4 (trace) and Mn0.5Cd0.5S (1.96 mmol g−1 h−1). Cycling test reveals that the ZMWCS-2 nanocomposite can maintain stable photocatalytic hydrogen evolution for seven cycles (21 h). The type of heterojunction in the ZWMCS-2 nanocomposite can be identified as Z-scheme heterojunction. The Z-scheme heterojunction can effectively separate the electrons and holes, so that the hydrogen generation activity and stability of the ZWMCS-2 nanocomposite can be enhanced. This work provides a highly efficient and stable Z-scheme heterojunction photocatalyst for hydrogen generation.
- Subjects
INTERSTITIAL hydrogen generation; HYDROGEN production; PRECIOUS metals; NANOCOMPOSITE materials; HYDROGEN as fuel; HETEROJUNCTIONS
- Publication
Catalysts (2073-4344), 2022, Vol 12, Issue 12, p1527
- ISSN
2073-4344
- Publication type
Article
- DOI
10.3390/catal12121527