1. Construction of S-Scheme heterojunction Ni11(HPO3)8(OH)6/CdS photocatalysts with open framework surface for enhanced H2 evolution activity.
- Author
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Lv, Shuhua, Sun, Yuanyuan, Liu, Dongzheng, Song, Caixia, and Wang, Debao
- Subjects
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HETEROJUNCTIONS , *PHOTOCATALYSTS , *VISIBLE spectra , *STRUCTURAL frames , *ELECTRIC fields , *CHARGE carriers , *SURFACE structure - Abstract
[Display omitted] The emerging S-scheme heterojunction shows a particular superiority in enhancing the efficiency of charge separation in photocatalyst. Herein, a Ni 11 (HPO 3) 8 (OH) 6 /CdS heterojunctions (NiPO/CdS) are constructed for the first time by loading open framework structure NiPO on the surface of CdS nanoparticles (CdS NPs). The built-in electric field generated at the interface promotes the directional migration of photogenerated electrons from NiPO to CdS. This S-scheme pathway achieves a strong redox capacity and efficient carrier separation. More importantly, the unique triangular and hexagonal channels of NiPO facilitate the exposure of CdS active sites for proton adsorption, H 2 production and escape. The hydrogen evolution rate of NiPO/CdS is 39 mmol g−1 h−1 under visible light irradiation, which is 6.5 times higher than that of pure CdS. The NiPO/CdS heterojunction also exhibits remarkable long-term stability. This study provides a new strategy for the ingenious design of S-scheme photocatalysts with excellent photocatalytic performance. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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