期刊
CHINESE CHEMICAL LETTERS
卷 31, 期 10, 页码 2795-2798出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cclet.2020.07.046
关键词
Co-catalyst; Cu1.8S/Zn0.35Cd0.65S; Density functional theory (DFT); Charge separation and transfer
资金
- National Natural Science Foundation of China [21722702, 21874099]
- Tianjin Commission of Science and Technology as key technologies RD projects [18YFZCSF00730, 18YFZCSF00770, 18ZXSZSF00230]
- National Key Basic Research Program of China [2017YFA0403402]
- Science and Technology Research Projects of Colleges and Universities in Hebei province [ZD2020149]
The development of photocatalysts for hydrogen evolution is a promising alternative to industrial hydrogen evolution; however, generation of high active, recyclable, inexpensive heterojunctions are still challenging. Herein, a novel strategy was developed to synthesize non-noble metal co-catalyst/solid solution heterojunctions using metal-organic frameworks (MOFs) as a precursor template. By adjusting the content of MOFs, a series of Cu1.8S/ZnxCd1-xS heterojunctions were obtained, and the Cu1.8S(3.7%)/Zn0.35Cd0.65S sample exhibits a maximum hydrogen evolution rate of 14.27 mmol h(-1) g(-1) with an apparent quantum yield of 3.7% at 420 nm under visible-light irradiation. Subsequently, the relationship between the heterojunction and photocatalytic activity were investigated by detailed characterizations and density functional theory (DFT) calculations, which reveal that loading Cu1.8S can efficiently extend the light absorption, meanwhile, the electrons can efficiently transfer from Zn0.35Cd0.65S to Cu1.8S, thus resulting more photogenerated electrons participating in surface reactions. This result can be valuable inspirations for the exploitation of advanced materials using rationally designed nanostructures for solar energy conversion. (C) 2020 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
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