Fabrication of Ag3PO4-Graphene Composites with Highly Efficient and Stable Visible Light Photocatalytic Performance

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• 作者：Xiaofei Yang ; Haiying Cui ; Yang Li ; Jieling Qin ; Rongxian Zhang ; Hua Tang
• 刊名：ACS Catalysis
• 出版年：2013
• 出版时间：March 1, 2013
• 年：2013
• 卷：3
• 期：3
• 页码：363-369
• 全文大小：446K
• 年卷期：v.3,no.3(March 1, 2013)
• ISSN：2155-5435

文摘

A facile and effective hydrothermal method for the fabrication of the Ag₃PO₄-graphene (Ag₃PO₄-GR) visible light photocatalyst has been developed to improve the photocatalytic performance and stability of Ag₃PO₄, and also to reduce the high cost of Ag₃PO₄ for practical uses. The size and morphology of Ag₃PO₄ particles could be tailored by the electrostatically driven assembly of Ag⁺ on graphene oxide (GO) sheets and by the controlled growth of Ag₃PO₄ particles on the GO surface. The generation of Ag₃PO₄ and the transformation of GO to GR can be achieved simultaneously in the hydrothermal process. The improved photocatalytic activity of Ag₃PO₄-GR composites under visible light irradiation is attributed to high-surface-area GR sheets, enhanced absorption of organic dyes, and more efficient separation of photogenerated electron鈥揾ole pairs. The transfer of photogenerated electrons from the surface of Ag₃PO₄ to GR sheets also reduces the possibility of decomposing Ag⁺ to metallic Ag, suggesting an improved stability of recyclable Ag₃PO₄-GR composite photocatalyst. Moreover, with the advances in the large-scale production of high-quality GO, the use of GO as the starting material can also reduce the cost for the synthesis of Ag₃PO₄-based photocatalysts without weakening their photocatalytic activities.

Keywords:

graphene; Ag₃PO₄; composites; hydrothermal; visible light photocatalytic