1. Zinc-vacancy mediated Z-scheme photocatalyst of ZnS/LaTiO2N for hydrogen evolution under visible-light.
- Author
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Yu, Jiaqi, Qi, Jinwei, Lin, Nansong, Zhang, Zizhong, Ji, Tao, and Su, Wenyue
- Subjects
- *
HYDROGEN evolution reactions , *SILVER , *HYDROGEN , *COLLECTIVE action , *ENERGY shortages , *HETEROJUNCTIONS , *ZINC - Abstract
Solar-powered photocatalytic water splitting for hydrogen evolution presents a promising solution to the energy crisis and contemporary environmental challenges. Herein, a Z-scheme ZnS/LaTiO 2 N heterojunction composite, incorporating zinc vacancies, has been successfully synthesized to enable photocatalytic hydrogen evolution under visible-light illumination. The optimized ZnS(V Zn)/LaTiO 2 N composite demonstrates a hydrogen evolution activity 13 times higher than that of individual ZnS(V Zn). The heterojunction between ZnS and LaTiO 2 N, in conjunction with zinc vacancies, expands the photoresponse spectrum and facilitates the spatial separation and transfer of photogenerated carriers. Consequently, this synergy significantly enhances the performance of photocatalytic hydrogen evolution. The collaborative action of the Z-scheme heterojunction and zinc vacancies paves the way for innovative approaches in designing future high-efficiency photocatalysts. • A direct Z-scheme ZnS(V Zn)/LaTiO 2 N photocatalyst is synthesized. • The synergies of Zn vacancies and Z-scheme heterojunction on enhancing the photocatalytic H 2 evolution activity. • The transfer mechanism of photogenerated charge over the ZnS(V Zn)/LaTiO 2 N is studied in detail. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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