Synthesis and Characterization of Novel BiVO4/Ag3VO4 Heterojunction with Enhanced Visible-Light-Driven Photocatalytic Degradation of Dyes

详细信息    查看全文

• 作者：Ming Yan ; Yilin Wu ; Yan Yan ; Xu Yan ; Fangfang Zhu ; Yinqun Hua ; Weidong Shi
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2016
• 出版时间：March 7, 2016
• 年：2016
• 卷：4
• 期：3
• 页码：757-766
• 全文大小：661K
• ISSN：2168-0485

文摘

Development of efficient photocatalysts for environmental remediation under visible light conditions has obtained much attention in recent years. In this study, the novel BiVO₄/Ag₃VO₄ heterojunction has been successfully fabricated via a hydrothermal process and a facile precipitation reaction. The organic dye Rhodamine B (RhB) was chosen to explore the photocatalytic performance, and it was found that the synthetic sample at 10:1 mol ratio of BiVO₄:Ag₃VO₄ had the highest photocatalytic activity among all the photocatalysts. The RhB was completely degraded (95.9%) under visible light irradiation in 20 min, which was 10 times and 3.4 times higher than those of pristine BiVO₄ and Ag₃VO_4, respectively. Furthermore, the A/10B sample also showed superior degradation activity on the other organic dyes such as methyl blue (MB), methyl red (MR), and methyl violet (MV). It is assumed that the enhanced photocatalytic property could be ascribed to the heterojunction, leading to an effective separation of the photogenerated charges carriers. The responsible photocatalytic mechanism is discussed based on the active species trapping experiments and ESR, and it was found that h⁺ and •OH are for the photocatalytic process.