Wang Wenran, Yu Xueru, Zhang Yutong, Huang Liuqing, Wang Hongyi, Gu Cheng, Chen Zhanghao
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 210023, Nanjing, P.R. China.
Nanjing Research Institute of Ecological and Environmental Protection, 175 Huju Road, 210013, Nanjing, P.R. China.
Bull Environ Contam Toxicol. 2022 Dec;109(6):1167-1174. doi: 10.1007/s00128-022-03629-w. Epub 2022 Nov 4.
Novel visible-light-driven AgPO/AgBr/AgI photocatalysts were prepared via a simple self-assembly strategy combined with in-situ anion-exchanging process. The photocatalytic activity of AgPO was significantly improved by constructing double-Z system. Specifically, the obtained materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS) and UV-vis diffuse reflectance spectroscopy (DRS). Under visible light irradiation (λ > 420 nm), the AgPO/AgBr/AgI photocatalysts showed much higher photocatalytic activity than bulk AgPO for the degradation of formaldehyde (HCHO), and 100% HCHO degradation could be obtained within 28 min. The degradation efficiency could be maintained in five cycles. Further electron paramagnetic resonance (ESR) tests demonstrated that both •OH and •O generated in the system. This study provides new insights into the fabrication of highly efficient visible-light-driven photocatalysts and facilitates their practical application in emerging environment issues.
通过简单的自组装策略结合原位阴离子交换过程制备了新型可见光驱动的AgPO/AgBr/AgI光催化剂。通过构建双Z体系，显著提高了AgPO的光催化活性。具体而言，采用X射线衍射（XRD）、扫描电子显微镜（SEM）、X射线光电子能谱（XPS）和紫外-可见漫反射光谱（DRS）对所得材料进行了表征。在可见光照射（λ > 420 nm）下，AgPO/AgBr/AgI光催化剂对甲醛（HCHO）降解表现出比块状AgPO更高的光催化活性，在28分钟内可实现100%的HCHO降解。降解效率在五个循环中得以保持。进一步的电子顺磁共振（ESR）测试表明，体系中同时产生了•OH和•O。该研究为高效可见光驱动光催化剂的制备提供了新的见解，并促进了其在新出现的环境问题中的实际应用。
