In-situ topotactic construction of novel rod-like Bi_(2)S_(3)/Bi_(5)O_(7)I p-n heterojunctions with highly enhanced photocatalytic activities  

作　　者：Peng Ju Lei Hao Yu Zhang Jianchao Sun Kunpeng Dou Zhaoxia Lu Dankui Liao Xiaofan Zhai Chengjun Sun 

机构地区：[1]Key Laboratory of Marine Eco-Environmental Science and Technology,Marine Bioresource and Environment Research Center,First Institute of Oceanography,Ministry of Natural Resources,Qingdao,266061,P.R.China [2]CAS Key Laboratory of Marine Environmental Corrosion and Bio-fouling,Institute of Oceanology,Chinese Academy of Sciences,Qingdao,266071,P.R.China [3]Open Studio for Marine Corrosion and Protection,Pilot National Laboratory for Marine Science and Technology(Qingdao),Qingdao,266237,P.R.China [4]School of Environment and Material Engineering,Yantai University,Yantai,264005,P.R.China [5]College of Chemistry and Chemical Engineering,Guangxi Key Laboratory of Petrochemical Resources Processing and Process Enhancement Technology,Guangxi University,Nanning,530004,P.R.China [6]College of Information Science and Engineering,Ocean University of China,Qingdao,266100,P.R.China

出　　处：《Journal of Materials Science & Technology》2023年第4期126-141,共16页材料科学技术（英文版）

基　　金：This work was financially supported by the Basic Scientific Fund for National Public Research Institutes of China(Nos.2020S02 and 2019Y03);the Key Research and Development Program of Shandong Province(Major Scientific and Technological Innovation Project)(No.2019JZZY020711);the Young Elite Scientists Sponsor-ship Program by CAST(No.YESS20210201);National Natural Science Foundation of China(No.51702328).

摘　　要：In this work,a novel Bi_(2)S_(3)/Bi_(5)O_(7)I p-n heterojunction with three-dimensional rod-like nanostructure was successfully constructed through an in-situ topotactic ion exchange approach.A possible evolution mech-anism from Bi_(5)O_(7)I nanobelts(NBs)into Bi_(2)S_(3)/Bi_(5)O_(7)I rod-like heterostructures(BSI RHs)was proposed,depicting the self-assembly process of internal Bi_(5)O_(7)I NBs and outside networks interwoven by Bi_(2)S_(3)nanorods(NRs),which abided by the Ostwald ripening and epitaxial growth.Owing to the formation of p-n heterojunction and rich oxygen vacancies(OVs),the visible-light absorption ability and separation of photogenerated charge carriers of BSI RHs were highly promoted,leading to a greatly improved photocatalytic ability than that of Bi_(2)S_(3)and Bi_(5)O_(7)I.BSI-1 exhibited the strongest photocatalytic performance,and almost all rhodamine B(RhB)and Pseudomonas aeruginosa(P.aeruginosa)can be thoroughly removed within 90 min.Moreover,a possible photocatalytic mechanism of BSI RHs was proposed based on the tests of active species trapping,electron spin resonance(ESR),photoelectrochemistry(PEC),and photoluminescence(PL)combined with the density functional theory(DFT)simulated computation,vali-dating the dominating roles of·O_(2)^(−)and h+during the photocatalytic process.This work is expected to motivate further efforts for developing novel heterostructures with highly efficient photocatalytic performances,which presents a promising application prospect in the fields of energy and environment.

关 键 词：ANTIFOULING Bi_(5)O_(7) I Photocatalytic HETEROSTRUCTURE Bi_(2)S_(3) 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]