期刊
ACS APPLIED MATERIALS & INTERFACES
卷 10, 期 41, 页码 35184-35193出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.8b11988
关键词
three-dimensional heterostructure; core shell; ZnO nanorod arrays; CdS; WS2; visible-light H-2 generation
资金
- NSFC [61475035, 11734005, 61704024]
- Science & Technology Project of Jiangsu Province [BE2016177, BK20170696]
- Scientific Research Foundation of Graduate School of Southeast University [YBJJ1828]
- Collaborative Innovation Center of Suzhou Nano Science and Technology
Constructing heterostructured nanomaterials with integrating different functional materials into well-oriented nanoarchitectures is an efficacious tactic to obtain high-performance photocatalysts. In this paper, we fabricated three-dimensional ZnO-WS2@CdS core-shell nanorod arrays as visible-light-driven photocatalysts for efficient photocatalytic H-2 production. This unique core-shell heterostructure extends visible-light absorption and provides more active sites. More importantly, the ZnO-WS2@CdS nanorod arrays build a beneficial energy level configuration and spatial structure to accelerate the generation, separation, and transfer of the photogenerated electron-hole. On the basis of the synergistic effects, the photocatalytic H-2 rate of optimized ZnO-WS2@CdS nanorod arrays achieves 15.12 mmol h(-1) g(-1) in visible light irradiation, which is 39, 9, and 8 times higher than pure CdS, ZnO-CdS, and CdS-WS2 photocatalysts. The apparent quantum yield is up to 14.92% at 420 nm. Moreover, the core-shell heterostructure photocatalyst can recycle and maintain stability.
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