期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 47, 期 17, 页码 9895-9904出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2022.01.0680360-3199
关键词
Photocatalysis; H-2 generation; Nano-heterostructures; Z-Scheme structure; Cadmium sulfide
资金
- Shandong Province Natural Science Foundation [ZR2020MB031, ZR2017PB002, ZR2018PB001]
- Research Fund for the Doctoral Program of Liaocheng University [318051640, 318051643]
By optimizing the NiWO4/CdS heterostructure design, it exhibits excellent performance in water splitting reactions, attributed to the nanostructures with multiple active sites, intimate contact interface, and enhanced charge separation rate. Moreover, the detailed analysis of band structures and proposed photocatalytic mechanism can guide the synthesis of efficient heterostructures.
Exploiting efficient catalysts is of interest for solar-driven water splitting. Herein, a novel NiWO4/CdS nanosheets-on-nanorods direct Z-Scheme heterostructure was developed by using a facile in-situ approach. The optimized NiWO4/CdS heterostructure shows a H2 evolution rate of 26.43 mmol g-1 h-1 exceeding that of bare CdS by more than 75 folds. Systematic investigations reveal the nanostructures with numerous active sites, intimate contact interface, and enhanced charge separation rate synergistically account for the outstanding performance of the NiWO4/CdS. Moreover, the band structures were detailedly analyzed and the tentative photocatalytic mechanism was proposed, which could contribute to deeply understanding the catalytic process and guide the synthesis of the efficient heterostructure. These findings and strategies may have great significance in promoting the development of highly efficient and low-cost photocatalysts.
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