Novel organic/inorganic PDI-Urea/BiOBr S-scheme heterojunction for improved photocatalytic antibiotic degradation and H_(2)O_(2) production  

作　　者：Weiwei Wang Xibao Li Fang Deng Jiyou Liu Xiaoming Gao Juntong Huang Jilin Xu Zhijun Feng Zhi Chen Lu Han 

机构地区：[1]School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang 330063,China [2]Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle,Nanchang Hangkong University,Nanchang 330063,China [3]Department of Chemistry and Chemical Engineering,Shaanxi Key Laboratory of Chemical Reaction Engineering,Yan'an University,Yan'an 716000,China [4]School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan 114051,China

出　　处：《Chinese Chemical Letters》2022年第12期5200-5207,共8页中国化学快报（英文版）

基　　金：support from the National Natural Science Foundation of China(Nos.51962023,51862024);the Natural Science Foundation of Jiangxi Province,China(Nos.20212BAB204045,20192ACBL21047);the Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle(Nanchang Hangkong University)(No.ES202002077).

摘　　要：The matched energy band structure and efficient carrier separation efficiency are the keys to heterogeneous photocatalytic reactions.A novel organic/inorganic step scheme(S-scheme)heterojunction PDI-Urea/BiOBr composite photocatalyst was constructed by simple solvothermal reaction combined with in-situ growth strategy.The composite photocatalyst not only has high chemical stability,but also can generate and accumulate a large number of active species(h^(+),·O_(2)^(-),·OH,H_(2)O_(2)).PDI-Urea/BiOBr showed higher photocatalytic activity for the degradation of antibiotic such as ofloxacin(OFLO),tetracycline(TC)and the production of H_(2)O_(2) in the spectral range of 400-800 nm.The apparent rate constant of 15%PDI-Urea/BiOBr for photocatalytic degradation of TC(or OFLO)was 2.7(or 2.5)times that of pure BiOBr and 1.7(or 1.8)times that of pure PDI-Urea.The H_(2)O_(2) evolution rate of 15%PDI-Urea/BiOBr was 2.5 times that of PDI-Urea and 1.5 times that of BiOBr,respectively.This work has formed a mature S-scheme heterojunction design thought and method,which offers new visions for the development of heterogeneous photocatalysts.

关 键 词：Photocatalysis Perylene diimide Bismuth bromide oxide S-scheme heterojunction Antibiotic 

分 类 号：X703[环境科学与工程—环境工程] TQ123.6[化学工程—无机化工] TQ426