Fabrication of graphene modified CeO_(2)/g-C_(3)N_(4)heterostructures for photocatalytic degradation of organic pollutants  

作　　者：Zhi Zhu Xiaohan Xing Qi Qi Wenjing Shen Hongyue Wu Dongyi Li Binrong Li Jialin Liang Xu Tang Jun Zhao Hongping Li Pengwei Huo 

机构地区：[1]Institute of the Green Chemistry and Chemical Technology,Institute for Advanced Materials,Jiangsu University,Zhenjiang,212000,PR China [2]Department of Biology,Hong Kong Baptist University,Hong Kong SAR,PR China [3]National and Local Joint Engineering Laboratory of Municipal Sewage Resource Utilization Technology,School of Environmental Science and Engineering,Suzhou University of Science and Technology,Suzhou,215009,PR China [4]College of Resources and Environment,Zhongkai University of Agriculture and Engineering,Guangzhou,510225,PR China

出　　处：《Chinese Journal of Structural Chemistry》2023年第12期3-10,共8页结构化学（英文）

基　　金：supported by the National Natural Science Foundation of China(Nos.22208127,22108102);the Senior Talent Research Foundation of Jiangsu University(23JDG030);Hong Kong Scholar Program(XJ2020031);the RGC Postdoctoral Fellowship Scheme of Hong Kong.

摘　　要：A specific type S-scheme photocatalyst CeO_(2)@N-GO/g-C_(3)N_(4)was successfully synthesized,resulting in a 2-mer-captobenzothiazole(MBT)degradation rate of 100%,which is more than twice that of g-C_(3)N_(4)and CeO_(2).The improved degradation performance can be attributed to the introduction of N-graphene oxide(N-GO),which facilitates the electron transfer.Additionally,the unique Ce^(4+)→Ce^(3+)conversion property enhances the charge carrier utilization,and thereby the photocatalytic activity.Furthermore,theoretical calculations suggest the formation of an interfacial internal electric field(IEF)formed between CeO_(2)(the(200)and(311)planes)and g-C_(3)N_(4)(the(002)plane)to enhance the delocalization of the charge carriers.Moreover,various photo-electrochemical analyses are employed for the in-depth mechanism on MBT degradation and IEF-induced S-scheme over CeO_(2)@N-GO/g-C_(3)N_(4),where the differential charge proves the electron transfer path from CeO_(2)to g-C_(3)N_(4)that significantly prolongs its lifetime.The radical capture and electron spin resonance(ESR)results proved the existence of the active species of·OH,·O_(2)^(-),and h^(+)in the S-scheme photocatalytic system.

关 键 词：S-scheme heterojunction 2-MERCAPTOBENZOTHIAZOLE Internal electric field Theoretical calculation N-GO assisted 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]