期刊
MATERIALS LETTERS
卷 232, 期 -, 页码 36-39出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2018.08.072
关键词
Ag/Ag3PO4/CeO2; Nanocomposite; Semiconductor; Z-scheme mechanism; CO2 photoreduction
资金
- National Natural Science Foundation of China [51662031, 51572119, 51478214]
- Distinguished Young Scientists program of Jiangxi Province [20162BCB23040, 20162BCB23042]
- Natural Science Foundation of Jiangxi Province [20151BA B203012]
- Key research and development project of Jianxi Province [20161ACG70001]
A unique three dimensional Ag/Ag3PO4/CeO2 with Z-scheme structure was constructed and applied in photocatalytic reduction of CO2 under visible light, demonstrating superior performance in yielding CH3OH (42.5 mu mol gcat(-1)) and C2H5OH (31.5 mu mol gcat(-1)). During the photocatalysis, CeO2 microspheres provide abundant pores for loading Ag/Ag3PO4 nanoparticles, ensuring the stability of the light sensitizers. Furthermore, there is an inner electric field formed between Ag3PO4 and CeO2 with Ag working as e -h(+) quenching bridge. Benefited from the high conductivity of Ag, the combination between holes in CeO2 VB and electrons in Ag3PO4 CB can be promoted, enabling the formation of Z-scheme structure and leaving plenty of electrons in CeO2 host for CO2 reduction. Moreover, CeO2 as a basic metal oxide can transform inert linear CO2 to b-HCO3 and b-CO32 species to decline reductive potential of CO2. (C) 2018 Elsevier B.V. All rights reserved.
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