Ag nanoparticles deposited on oxygen-vacancy-containing BiVO4 for enhanced near-infrared photocatalytic activity
Ag nanoparticles deposited on oxygen-vacancy-containing BiVO4 for enhanced near-infrared photocatalytic activity
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DOI：
10.1016/s1872-2067(17)62990-5
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发表时间：
2018-01-18
影响因子：
16.5
通讯作者：
Zhang, Xiufang
中科院分区：
文献类型：
--
作者：
Shi, Chunjing;Dong, Xiaoli;Zhang, Xiufang
本文研究了含银纳米颗粒BiVO4催化剂在不同辐照条件下对有机染料罗丹明B的光降解。催化剂由沉积在含氧BiVO4上的银纳米颗粒组成。BIVO4的形貌呈橄榄状，尺寸分布均匀。BiVO4具有较高的氧空位密度，制备的银纳米颗粒-BiVO4催化剂具有比BiVO4更高的光催化活性。模拟太阳照射100 min后，纳米银颗粒- bivo4催化剂对RhB的降解率为99%。含有氧空位的BiVO4作为合理设计的载体，将催化剂的反应扩展到近红外区域，并促进等离子体热电子的捕获和转移。增强的光催化效率归因于BiVO4向Ag纳米粒子的电荷转移以及Ag纳米粒子的表面等离子体共振。这些关于电子空穴分离和电荷转移的见解可能会引起人们对太阳能驱动的废水处理和水分解的兴趣。(C) 2018，中国科学院大连化学物理研究所。Elsevier B.V.版权所有。
This study investigates the photodegradation of the organic dye rhodamine B by Ag-nanoparticle-containing BiVO4 catalysts under different irradiation conditions. The catalysts consist of Ag nano particles deposited on oxygen-vacancy-containing BiVO4. The morphology of the BIVO4 is olive shaped, and it has a uniform size distribution. The BiVO4 possesses a high oxygen vacancy density, and the resulting Ag nanoparticle-BiVO4 catalyst exhibits higher photocatalytic activity than BiVO4. The RhB degradation by the Ag nanoparticle-BiVO4 catalyst is 99% after 100 min of simulated solar irradiation. BiVO4 containing oxygen vacancies as a rationally designed support extends the catalyst response into the near-infrared region, and facilitates the trapping and transfer of plasmonic hot electrons. The enhanced photocatalytic efficiency is attributed to charge transfer from the BiVO4 to Ag nanoparticles, and surface plasmon resonance of the Ag nanoparticles. These insights into electron-hole separation and charge transfer may arouse interest in solar-driven wastewater treatment and water splitting. (C) 2018, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.