Single-atom Ag-loaded carbon nitride photocatalysts for efficient degradation of acetaminophen:The role of Ag-atom and O_(2)

作     者：Yi Yuan Wen-Long Wang Zhi-Wei Wang Jin Wang Qian-Yuan Wu Yi Yuan;Wen-Long Wang;Zhi-Wei Wang;Jin Wang;Qian-Yuan Wu

作者机构：Key Laboratory of Microorganism Application and Risk Control of ShenzhenGuangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental SafetyInstitute of Environment and EcologyShenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Shenzhen Environmental Science and New Energy Technology Engineering LaboratoryTsinghua-Berkeley Shenzhen InstituteShenzhen 518055China College of Materials Science and EngineeringShenzhen UniversityShenzhen 518071China 

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

年 卷 期：2024年第139卷第5期

页      面：12-22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] 08[工学] 09[农学] 0903[农学-农业资源与环境] 0703[理学-化学] 0702[理学-物理学] 0713[理学-生态学] 

基　　金：supported by the Shenzhen Science,Technology and Innovation Commission(No.JCYJ20200109142829123) the National Natural Science Foundation of China(No.52022049) 

主　　题：Ag single atom Carbon nitride Photocatalysis Visible light Adsorption energy Reactive species 

摘      要：Carbon nitride has been extensively used as a visible-light photocatalyst,but it has the disadvantages of a low specific surface area,rapid electron-hole recombination,and relatively low light *** this study,single-atom Ag was successfully anchored on ultrathin carbon nitride(UTCN)via thermal polymerization,the catalyst obtained is called *** Ag hardly changed the carbon nitride s layered and porous physical *** exhibited efficient visible-light photocatalytic performances in the degradation of various recalcitrant pollutants,eliminations of 85% were achieved by visible-light irradiation for *** with Ag improved the photocatalytic performance of UTCN by narrowing the forbidden band gap from 2.49 to 2.36 e V and suppressing electron-hole pair *** addition,Ag doping facilitated O_(2) adsorption on UTCN by decreasing the adsorption energy from -0.2 to -2.22 e V and favored the formation of O_(2)^(·-).Electron spin resonance and radical-quenching experiments showed that O_(2)^(·-)was the major reactive species in the degradation of Acetaminophen(paracetamol,APAP).