Novel Magnetically Separable Reduced Graphene Oxide (RGO)/ZnFe2O4/Ag3PO4 Nanocomposites for Enhanced Photocatalytic Performance toward 2,4-Dichlorophenol under Visible Light

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• 作者：Xiaojuan Chen ; Youzhi Dai ; Jing Guo ; Tanhua Liu ; Xingyan Wang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：January 27, 2016
• 年：2016
• 卷：55
• 期：3
• 页码：568-578
• 全文大小：926K
• ISSN：1520-5045

文摘

Novel magnetically separable nanocomposite photocatalyst reduced graphene oxide (RGO)/ZnFe₂O₄/Ag₃PO₄, prepared by the solvothermal and in situ precipitation method, was first investigated as the photocatalyst for 2,4-dichlorophenol (2,4-DCP) degradation under visible light irradiation. The catalysts with different mass ratios were systematically characterized with FT-IR, XPS, XRD, SEM, FESEM, UV–vis, and PL. The nanocomposite RGO/ZnFe₂O₄/Ag₃PO₄ showed enhanced photocatalytic activity and stability compared with pure Ag₃PO₄ under the same conditions. During the photocatalysis process, intermediates of 4-chlorophenol (4-CP) and some other low molecular weight acids, including maleic acid, glyoxylic acid, glycolic acid, oxalic acid, acetic acid, and formic acid were detected through GC/MS. According to these analyses and the capture experiments of reactive species, the photocatalytic mechanism of RGO/ZnFe₂O₄/Ag₃PO₄ was discussed on the basis of the heterojunction energy-band theory and Z-scheme theory, and a possible degradation pathway of 2,4-DCP was also proposed.