Wang Xuewen, Yao Xiong, Bai Haiting, Zhang Zhiyong
School of Information Science and Technology, Northwest University, Xi'an City, 710127, China.
School of Information Science and Technology, Northwest University, Xi'an City, 710127, China.
Environ Res. 2022 Sep;212(Pt D):113442. doi: 10.1016/j.envres.2022.113442. Epub 2022 May 16.
Bismuth-based materials are extensively studied for photocatalytic applications because of their unique crystal structure. Herein, we reported a binary graphene oxide (GO)/BiOCl composite material prepared by a hydrothermal method and analyzed its photodegradation mechanism through the semiconductor energy band theory. The degradation rate of the GO/BiOCl composite towards Rhodamine B could reach 93.6% within 8 min, and its performance exceeded that of most photocatalysts. The influencing factors for improving the photocatalytic activity are as follows: (1) abundant oxygen vacancies generated on the tight recombination interface; (2) a 2D-2D electron transfer channel between GO and BiOCl; and (3) GO acting as a load to provide more reaction sites for BiOCl nanosheets. This work provides a simple solution and theoretical explanation for the rapid degradation of pollutants, and has broad application prospects.
铋基材料因其独特的晶体结构而被广泛研究用于光催化应用。在此，我们报道了一种通过水热法制备的二元氧化石墨烯（GO）/BiOCl复合材料，并通过半导体能带理论分析了其光降解机理。GO/BiOCl复合材料对罗丹明B的降解率在8分钟内可达93.6%，其性能超过了大多数光催化剂。提高光催化活性的影响因素如下：（1）在紧密复合界面上产生大量氧空位；（2）GO和BiOCl之间的二维-二维电子转移通道；（3）GO作为载体为BiOCl纳米片提供更多反应位点。这项工作为污染物的快速降解提供了一种简单的解决方案和理论解释，具有广阔的应用前景。
