期刊
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
卷 379, 期 -, 页码 88-98出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2019.05.011
关键词
polypyrrole/g-C3N4; Photocatalysis; HER; Visible-light; Pollutants degradation
资金
- National Basic Research Program of China [2013CB632405, 2014CB260406]
- National Natural Science Foundation of China [21425309, 21173043]
- State Key Laboratory of NBC Protection for Civilian [SKLNBC2013-04K]
- Specialized Research Fund for the Doctoral Program of Higher Education [20133514110003]
In this work, we report the fabrication of polypyrrole/g-C3N4 (PPy/g-C3N4) nanocomposites via simple wet-chemical method. The photocatalytic activities of the composites are evaluated for water splitting to evolve H-2, Rhodamine B dye (RhB) and 2,4-dichlorophenol (2,4-DCP) degradation under visible-light. The results reveal that the photocatalytic performance of g-C3N4 for H-2 evolution, RhB dye and 2, 4-DCP degradation are significantly improved after coupling polypyrrole (PPy). Worth noting, the amount optimized (1 wt%PPy/g-C3N4) photocatalyst showed highest photoactivity compared to the other photocatalysts. Further, it is confirmed by means of radical trapping experiments that superoxide radical (O-2(center dot-)) is the dominant specie involved in the degradation of pollutants over PPy/g-C3N4 nano-composites. Moreover, clear photocatalytic reactions for H-2 evolution and pollutants degradation are proposed. This work would help us to deeply understand the reaction mechanism and will provide feasible routes to fabricate g-C3N4 based highly efficient photocatalysts for energy and environmental applications.
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