Solvothermal synthesis of graphene-Sb₂S₃ composite and the degradation activity under visible light

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• 作者：Wenguang Tao^a ; Jiuli Chang^a ; Dapeng Wu^a ; Zhiyong Gao^a ; ^{zygao512@163.com} ; Xiaoli Duan^b ; Fang Xu^a ; ^b ; Kai Jiang^a ; ^b ; ^{jiangkai6898@126.com}
• 关键词：A. Semiconductors ; A. Composites ; B. Chemical synthesis ; D. Catalytic properties
• 刊名：Materials Research Bulletin
• 出版年：2013
• 出版时间：February, 2013
• 年：2013
• 卷：48
• 期：2
• 页码：538-543
• 全文大小：960 K

文摘

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) 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.