Strong interface interaction and internal electric field promote electron transfer of Bi_(2)O_(2)S/NiFe_(2)O_(4) heterojunction for photocatalytic antibiotic degradation  

作　　者：Shaoxuan Pang Yilin Dong Dongyu Xu Qiuwen Wang Weihong Gao Lijun Zhang Kang Wang Guangming Zhang Longyi Lv Yuguo Xia Zhijun Ren Pengfei Wang 

机构地区：[1]School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,China [2]Tianjin Key Laboratory of Clean Energy and Pollutant Control,Tianjin 300401,China [3]School of Chemistry and Chemical Engineering,National Engineering Research Center for Colloidal Materials,Shandong University,Jinan 250100,China

出　　处：《Journal of Materials Science & Technology》2023年第27期145-155,共11页材料科学技术（英文版）

基　　金：the financial support by the National Natural Science Foundation of China as general projects(Grant Nos.51779068,52070066,52211530084,42277059,and 22006029);Tianjin Commission of Science and Technology as key technologies R&D projects(No.21YFSNSN00250);Doctoral Inno-vation Project of Hebei Province(CXZZBS2023031);the Royal Society/International Exchanges 2021 Cost Share/NSFC(Grant No.IEC\NSFC\211142).

摘　　要：Heterojunction photocatalysts have shown considerable activities for organic pollutants degradation.However,the faint connection interface and inferior charge shift efficiency critically block the property of heterojunction photocatalysis.Herein,Bi_(2)O_(2)S/NiFe_(2)O_(4) nanosheets heterojunction with ultrastrong inter-face interaction and high internal electric field are designed by an in-situ growth method.Tentative and theoretical consequences prove that the interfacial interaction and internal electric field not only act as the electron flow bridge but also decrease the electrons shift energy obstacle,thus speeding up electrons transfer and achieving effective spatial electron-hole separation.Therefore,a large amount of·O_(2)^(-)and holes as active species were generated.Remarkably,Bi_(2)O_(2) S/NiFe_(2)O_(4) establishes a considerably boosted photocatalytic performance for tetracycline degradation(0.032 min^(-1)),which is about 14.2-fold and 7.8-fold of the pristine BOS and NFO,respectively.This work provides a promising motivation for modulating charge transfer by interface control and internal electric field to boost photocatalytic performance.

关 键 词：Bi_(2)O_(2)S/NiFe_(2)O_(4) S-scheme heterojunction Ultrastrong interface interaction Internal electric field Active species Photocatalytic degradation 

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]