期刊
MATERIALS RESEARCH BULLETIN
卷 97, 期 -, 页码 189-194出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2017.09.006
关键词
Nanocomposites; Graphene oxide; Photocatalytic; Mechanism
资金
- NSFC [21002164]
- Natural Science Foundation of Jiangsu Province [BK 2010487]
- China Scholarship Council (CSC) [201406845005]
A novel ternary graphene oxide (GO)/Ag3PO4/AgBr composite was synthesized by an in situ growth of Ag3PO4/AgBr on GO nanosheets. The photocatalytic efficiency of the nanocomposite under visible light irradiation was much enhanced due to the coupling of GO nanosheets and Ag3PO4/AgBr, which enlarged the absorption region, facilitated the charge transportation, and enhanced the charge collection efficiency. According to the photocatalytic results, the 0.625%GO/Ag3PO4/AgBr sample shows the highest photocatalytic activity, about 3.6 times higher than that of Ag3PO4. According to the radical trapping test, the center dot O-2(-) and center dot OH radicals, together with h(+) are the dominant active species in the GO/Ag3PO4/AgBr photocatalytic process. A possible photocatalytic mechanism for photocatalytic degradation over GO/Ag3PO4/AgBr was proposed.
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