Photoreactivity and Mechanism of g-C3N4 and Ag Co-Modified Bi2WO6 Microsphere under Visible Light Irradiation

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• 作者：Xiaoping Xiao ; Jianhong Wei ; Yang Yang ; Rui Xiong ; Chunxu Pan ; Jing Shi
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2016
• 出版时间：June 6, 2016
• 年：2016
• 卷：4
• 期：6
• 页码：3017-3023
• 全文大小：522K
• 年卷期：0
• ISSN：2168-0485

文摘

In this study, C₃N₄@Ag-Bi₂WO₆ with flower-like architecture was successfully prepared through a facile process. The C₃N₄@Ag-Bi₂WO₆ particles with 2–4 μm diameters present remarkable enhanced visible light absorption and electron–hole separation efficiency. Compared with Bi₂WO₆, Ag-Bi₂WO₆, and C₃N₄@Bi₂WO₆ systems, the C₃N₄@Ag-Bi₂WO₆ system exhibits optimal photocatalytic activities in both the degradation of RhB and hydrogen production out of water under visible light irradiation. We propose that these results are attributed to the synergy effects of Ag, g-C₃N₄, and Bi₂WO₆ nanophase structures in the C₃N₄@Ag-Bi₂WO₆ composites, which results in a fast electron–hole separation and slow charge recombination by a Z-scheme mechanism and ultimately in a higher photocatalytic activity.