期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 198, 期 -, 页码 112-123出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2016.05.041
关键词
MIL-53(Fe); Graphene; Visible light photocatalysis; Direct hole oxidation; Alcohol oxidation
资金
- NSFC [21163016, 21563026]
- Gansu provincial Natural Science Foundation of China [1208RJZA287]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT15R56]
- Key Laboratory of Eco-Environment-Related Polymer Materials (Northwest Normal University), Ministry of Education
A series of MIL-53(Fe)-graphene nanocomposite photocatalysts were synthesized by a facile one-pot solvothermal reaction. All materials have been thoroughly characterized by FT-IR, SEM, TEM, PXRD, UV-vis DRS and PL analysis. It was demonstrated that the introducing of graphene on the MIL-53(Fe) would minimize the recombination of photogenerated electron-hole pairs, thus, leading to the enhancement of photocatalytic activity. MIL-53(Fe)-graphene nanocomposite was an efficient catalyst towards the photocatalytic selectively oxidation of alcohols to the corresponding aldehydes or ketones under visible light and ambient conditions. High selectivity of the aldehydes or ketones (99%) were obtained. Meanwhile, the catalyst can be recycled at least four times without loss of catalytic efficiency. A possible photocatalytic reaction mechanism involving a direct photogenerated hole-oxidation process was also investigated in detail by the active species trapping experiments and the related electrochemical analysis. (C) 2016 Elsevier B.V. All rights reserved.
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