Enhanced activity of ZnS(111) by N/Cu co-doping:Accelerated degradation of organic pollutants under visible light

作     者：Guofei Jiang Benjie Zhu Junzhi Sun Fang Liu Yongqiang Wang Chaocheng Zhao 

作者机构：College of Chemical EngineeringChina University of PetroleumQingdao 266580China State Key Laboratory of Petroleum Pollution ControlBeijing 102206China State Key Laboratory of Heavy Oil ProcessingChina University of PetroleumQingdao 266580China 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2023年第125卷第3期

页      面：244-257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）] 07[理学] 081705[工学-工业催化] 08[工学] 070304[理学-物理化学(含∶化学物理)] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by CNPC safety and environmental protection key technology research and promotion project (No. 2017D-4613) Sub project of national science and technology major project (No. 2016ZX05040-003) China University of Petroleum (East China) Graduate Innovative Engineering Project (No. YCX2020039)。 

主　　题：Catalytic degradation of visible light N/Cu co-doping ZnS(111) 2,4-Dichlorophenol Tetracycline 

摘      要：High-efficiency photocatalysts are of great significance for the application of photocatalytic technology in water treatment.In this study,N/Cu co-doped ZnS nanosphere photocatalys(N/Cu-ZnS) is synthesized by a hydrothermal method for the first time.After doping,the tex ture of nanosphere becomes loose,the nanometer diameter is reduced,making the specific surface area of catalyst increased from 34.73 to 101.59 m^(2)/g.The characterization results show that more ZnS (111) crystal planes are exposed by N/Cu co-doping;the calculations of density functional theory show that N/Cu co-doping can increase the catalytic activity of the ZnS (111) crystal plane,enhance the adsorption capacity of (111) crystal plane to O_(2)and promote the generation of·O_(2)-.The energy levels of the introduced impurities can be hybridized with the energy levels of S and Zn at the top of valence band and the bottom o conduction band,which makes the band gap narrower,thus enhancing the absorption o visible light.Compared with pure ZnS,the degradation rates of 2,4-dichlorophenol (2,4-DCP and tetracycline (TC) by N/Cu-ZnS under visible light (420 nm) are increased by 83.7 and51 times,respectively.In this research,a promising photocatalyst for photocatalytic degra dation of organic pollutants in wastewater is provided.