One-pot synthesis of graphene-cuprous oxide composite with enhanced photocatalytic activity

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• 作者：Zhiyong Gao ; Junli Liu ; Fang Xu ; Dapeng Wu ; Zhuangli Wu ; Kai Jiang ; ^{jiangkai6898@126.com}
• 关键词：Graphene ; Graphene&ndash ; Cu2O ; Photocatalysis ; Zeta potential
• 刊名：Solid State Sciences
• 出版年：2012
• 出版时间：February, 2012
• 年：2012
• 卷：14
• 期：2
• 页码：276-280
• 全文大小：702 K

文摘

In this paper, graphene-cuprous oxide (G-Cu₂O) composites were synthesized at room temperature using graphene oxide (GO) as two-dimensional support. From Zeta potential analysis, the surface charge of G-Cu₂O composites altered from positive to negative, which favors the adsorption and photodegradation of positively charged dyes. Compared with Cu₂O under similar synthesis condition, the G-Cu₂O composites demonstrated improved photodegradation activity for methylene blue (MB) dye under visible light. Controlled experiments indicated that the G-Cu₂O composite synthesized with 80 mg GO in the reaction system possessed more negative Zeta potential, highest specific surface area and thus presented the highest photocatalytic activity. Electrons mechanism for the improved photocatalytic performance of G-Cu₂O composite was proposed in the degradation of MB.