Co_(3)O_(4)-ZnO/rGO catalyst preparation and rhodamine B degradation by sulfate radical photocatalysis

作     者：Zhanmei ZHANG Yi ZHANG Xilin CHEN Ziran HUANG Zuqin ZOU Huaili ZHENG Zhanmei ZHANG;Yi ZHANG;Xilin CHEN;Ziran HUANG;Zuqin ZOU;Huaili ZHENG

作者机构：Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of EducationSchool of River and Ocean EngineeringChongqing Jiaotong UniversityChongqing 400074China National Engineering Research Center for Inland Waterway RegulationChongqing 400074China College of Environment and EcologyChongqing UniversityChongqing 400044China 

出 版 物：《浙江大学学报(英文版)A辑:应用物理与工程》 (Journal of Zhejiang University-Science A(Applied Physics & Engineering))

年 卷 期：2023年第24卷第8期

页      面：710-721页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081704[工学-应用化学] 081705[工学-工业催化] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070304[理学-物理化学(含∶化学物理)] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 

基　　金：the National Natural Science Foundation of China(No.21906012) 

主　　题：Co_(3)O_(4)-ZnO/rGO catalyst Rhodamine B(RhB) Heterojunction Photocatalysis Peroxymonosulfate(PMS) 

摘      要：The development of a combined photocatalytic system with peroxymonosulfate (PMS) has great potential applications in the degradation and treatment of aqueous organic pollutants. Herein, a Co_(3)O_(4)-ZnO/rGO was prepared by a hydrothermal method using cobalt acetate, zinc acetate, and reduced graphene oxide (rGO) as the main raw materials. The physical and chemical characteristics of the obtained catalyst were analyzed using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS),scanning electron microscopy (SEM), and Fourier transform infrared (FT-IR). The photocatalytic features and capacities of the catalytic materials to activate PMS were investigated. Co_(3)O_(4)-ZnO/rGO exhibited stronger photocatalytic activity and ability to activate PMS than Co_(3)O_(4)/rGO or ZnO/rGO, and significantly improved the ability of PMS and photocatalysis to synergistically degrade rhodamine B (RhB), with a degradation rate of 90.40% within 40 min. The mechanism of RhB degradation was proposed based on characterization of materials, evaluation of RhB degradation efficiency, and analysis of the active species involved. The unique particle/sheet structure of Co_(3)O_(4)-ZnO/rGO provides a large number of active sites, and the formation of heterojunctions between Co_(3)O_(4) and ZnO improves carrier separation and transport in the reaction system. Our study offers a reference for designing more effective heterojunction catalysts based on the combination of PMS and photocatalytic technology.