Ai Lili, Zhang Xinyi, Guo Nannan, Xu Mengjiao, Jia Dianzeng, Wang Luxiang, Tan Chuan, Cai Wenwen, Li Yuchun, Zha Manning
State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, College of Chemistry, Xinjiang University, Urumqi 830017, Xinjiang, P. R. China.
Langmuir. 2023 Dec 12;39(49):18073-18081. doi: 10.1021/acs.langmuir.3c02876. Epub 2023 Nov 28.
The defective BiOCl nanosheet exposed (001) facet with favorable photocatalytic performance was designed. The surface microstructure analysis and theoretical calculation certified the dominant exposed (001) facet and rich surface oxygen defects of Br-doped BiOCl (B-6) nanosheets. The energy level structure analysis indicates that the band gap can be narrowed and the light absorption range can be widened by introducing Br to BiOCl, and the presence of defective energy levels increases the photogenerated carrier transfer efficiency. Moreover, the doping of Br in BiOCl promotes the directional flow of electrons to the surface of B-6, which improves the photocatalytic performance of the sample. Thus, the Br-doped BiOCl can degrade 96.5% RhB within 6 min under visible-light irradiation with high apparent reaction rate constants of 0.51 min, exhibiting the strongest photocatalytic degradation performance. This work provides guidance for the preparation of Bi-based photocatalysts with excellent performance.
设计了具有良好光催化性能的暴露（001）面的缺陷型BiOCl纳米片。表面微观结构分析和理论计算证实了Br掺杂BiOCl（B-6）纳米片主要暴露的（001）面和丰富的表面氧缺陷。能级结构分析表明，通过向BiOCl中引入Br可以缩小带隙并拓宽光吸收范围，并且缺陷能级的存在提高了光生载流子的转移效率。此外，Br在BiOCl中的掺杂促进了电子向B-6表面的定向流动，从而提高了样品的光催化性能。因此，Br掺杂的BiOCl在可见光照射下6分钟内可降解96.5%的RhB，表观反应速率常数高达0.51 min，表现出最强的光催化降解性能。这项工作为制备具有优异性能的铋基光催化剂提供了指导。
