期刊
CHEMICAL ENGINEERING JOURNAL
卷 375, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2019.121970
关键词
Heterostructure; Photocatalysis; Core@shell structure; H-2 generation; Zn0.5Cd0.5S
资金
- National Natural Science Foundation of China [21801106]
- Shandong Province Natural Science Foundation [ZR2017PB002, ZR2018PB001, ZR2016BQ35]
- Research Fund for the Doctoral Program of Liaocheng University [318051640, 318051643]
Photocatalytic H-2 evolution from water splitting offers an attractive scientific and technological method to address the energy and environmental crisis. In this study, noble-metal-free Zn0.5Cd0.5S@MoS2 core@shell nanoheterostructures were elaborately designed and successfully synthesized. The visible-light-driven photocatalytic performance investigation shows that the Zn0.5Cd0.5S@MoS2 exhibits a state-of-the-art H-2 evolution rate of 40.2 mmol g(-1) h(-1) far exceeding that of pristine Zn0.5Cd0.5S by more than 57 times. Moreover, thanks to the protection of MoS2 shells, the Zn0.5Cd0.5S@MoS2 can retain long-term stability in four-cycles of 24 h reactions. Furthermore, a tentative mechanism on H-2 generation was systematically investigated and proposed, which contributes to understand the enhanced photocatalytic activity of the Zn0.5Cd0.5S@MoS2 heterostructures and may inspire the synthesis of other desirable catalytic systems.
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