CdBiO2Br nanosheets in situ strong coupling to carbonized polymer dots and improved photocatalytic activity for organic pollutants degradation  

作　　者：Zhiyuan Pang Bin Wang Xingwang Yan Chongtai Wang Sheng Yin Huaming Li Jiexiang Xia 

机构地区：[1]School of Chemistry and Chemical Engineering,Institute for Energy Research,Jiangsu University,Zhenjiang 212013,China [2]School of Chemistry and Chemical Engineering,the Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province,Hainan Normal University,Haikou 571158,China

出　　处：《Chinese Chemical Letters》2022年第12期5189-5195,共7页中国化学快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.22108106,21676128);China Postdoctoral Science Foundation(No.2020M680065);Hong Kong Scholar Program(No.XJ2021021);Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province(No.KFKT2021005).

摘　　要：Carbonized polymer dots(CPDs)modified layer-structured CdBiO_(2)Br(CPDs/CdBiO_(2)Br)Z-scheme heterojunction hybrid material has been synthesized via simple solvothermal method.The hybrid material with Z-scheme heterojunction can effectively maintain the original highly oxidizing holes of CdBiO_(2)Br and the highly reducing electrons of CPDs.In addition,the construction of heterostructure is beneficial to the migration and separation of photogenerated carriers.Under visible light irradiation,6 wt%CPDs/CdBiO_(2)Br showed the best catalytic activity for degradation of organic pollutants.Free radical capture experiments and ESR analysis confirmed that the main active species are·O_(2)^(-)and h^(+).The decomposition process of organic pollutants was analyzed by LC-MS.Finally,the probable visible light mechanism performance of CPDs/CdBiO_(2)Br as direct Z-scheme heterojunction photocatalytic materials was proposed.

关 键 词：Carbonized polymer dots CdBiO_(2)Br Direct Z-scheme heterojunction Pollutant degradation Photocatalytic activity 

分 类 号：X505[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]