期刊
MATERIALS RESEARCH BULLETIN
卷 48, 期 2, 页码 538-543出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2012.11.053
关键词
Semiconductors; Composites; Chemical synthesis; Catalytic properties
资金
- Natural Science Foundation of China [61176004, 61204078]
- Natural Science Foundation of Education Department of Henan Province [2010B150012, 2011A150017]
Novel graphene-Sb2S3 (G-Sb2S3) composites were synthesized via a facile solvothermal method with graphene oxide (GO), SbCl3 and thiourea as the reactants. GO played an important role in controlling the size and the distribution of the formed Sb2S3 nanoparticles on the graphene sheets with different density. Due to the negative surface charge, smaller Sb2S3 particles size and efficient electrons transfer from Sb2S3 to graphene, the composites demonstrated improved photodegradation activity on rhodamine B (RhB). Among these composites, the product G-Sb2S3 0.1, which was synthesized with the GO concentration of 0.1 mg/mL, exhibited the highest photodegradation activity owing to the considerable density of Sb2S3 nanoparticles onto graphene sheet free of aggregation. Hydroxyl radicals ((OH)-O-center dot) derived from conduction band (CB) electrons of Sb2S3 is suggested to be responsible for the photodegradation of RhB. The high visible light degradation activity and the satisfactory cycling stability made the as-prepared G-Sb2S3 0.1 an applicable photocatalyst. (C) 2012 Elsevier Ltd. All rights reserved.
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