Simple synthesis of BiOI/ZnO/rGO for efficient photocatalytic degradation of antibiotic chloramphenicol under visible light  

作　　者：Zihan Zhu Feng Guo Anming Li Weichao Xu Xuehan Zhang 

机构地区：[1]School of Ocean Science and Technology,Dalian University of Technology,Panjin 124221,China

出　　处：《Journal of Environmental Sciences》2023年第12期65-76,共12页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (No.31270620);the Dalian Scientific and Technological Innovation Foundation (No.2018J12SN072)。

摘　　要：BiOI/ZnO/rGO(reduced graphene oxide) composite photocatalyst was fabricated using a simple one-step hydrothermal process and applied to the degradation of antibiotic chloramphenicol(CAP). By tuning the Bi/Zn ratios, the structure and photoelectric properties of the catalyst were investigated and characterized in terms of their morphological, structural, optical and photoelectrochemical properties. The as-synthesized composite photocatalysts are well-crystalline, uniform dispersion and exhibit good photocatalytic properties.The photocatalytic degradation rate of CAP by BiOI/ZnO/rGO composite is 8.1 times and 1.8times that of BiOI and ZnO, respectively. The photocatalytic mechanism studies revealed that the synergistic effect between rGO and BiOI/ZnO can effectively separate photogenerated electron–hole, enhance photocurrents and conductivity, and improve charge carrier densities. Moreover, BiOI/ZnO/rGO possesses good stability and reusability that the degradation efficiency remained above 80% even after 5 recycling. This study reveals that both the introduction of rGO and heterostructure construction between BiOI and ZnO play a crucial role in their photoelectrochemical and photocatalytic properties.

关 键 词：BiOI/ZnO/rGO(reduced graphene oxide) PHOTODEGRADATION CHLORAMPHENICOL Visible light 

分 类 号：TQ426[化学工程] X703[环境科学与工程—环境工程]