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 

机构地区：[1]College of Chemical Engineering,China University of Petroleum,Qingdao 266580,China [2]State Key Laboratory of Petroleum Pollution Control,Beijing 102206,China [3]State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Qingdao 266580,China

出　　处：《Journal of Environmental Sciences》2023年第3期244-257,共14页环境科学学报（英文版）

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)。

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.

关 键 词：Catalytic degradation of visible light N/Cu co-doping ZnS(111) 2 4-DICHLOROPHENOL TETRACYCLINE 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学] O644.1[理学—化学]