Structure-phase transformation of bismuth oxide to BiOCl/Bi_(24)O_(31)Cl_(10)shoulder-by-shoulder heterojunctions for efficient photocatalytic removal of antibiotic  

作　　者：Man Yang Zhenzhen Shi Shaodong Sun Bian Yang Jie Cui Jianing Li Daqin Yun Nian Lei 

机构地区：[1]Engineering Research Center of Conducting Materials and Composite Technology,Ministry of Education,Shaanxi Engineering Research Center of Metal-Based Heterogeneous Materials and Advanced Manufacturing Technology,Shaanxi Province Key Laboratory for Electrical Materials and Infiltration Technology,School of Materials Science and Engineering,Xi’an University of Technology,Xi’an 710048,China [2]College of Energy,Xiamen University,Xiamen 361005,China [3]Beijing Key Laboratory of Ionic Liquids Clean Process,Institute of Process Engineering,Chinese Academy of Sciences,Beijing 100190,China

出　　处：《Journal of Environmental Sciences》2025年第3期149-163,共15页环境科学学报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.22208262,52271228,52202298,52201279,51834009,and 51801151);the Natural Science Foundation of Shaanxi Province(Nos.2021JQ-468,2020JZ-47);the Natural Science Foundation of Shaanxi Provincial Department of Education(No.21JP086);the Postdoctoral Research Foundation of China(Nos.2020M683528 and 2018M633643XB);the Young Talent Fund of Association for Science and Technology in Shaanxi,China(No.20230625);the Hundred Talent Program of Shaanxi Province.

摘　　要：Developing heterojunction photocatalyst with well-matched interfaces andmultiple charge transfer paths is vital to boost carrier separation efficiency for photocatalytic antibiotics removal,but still remains a great challenge.In present work,a new strategy of chloride anion intercalation in Bi_(2)O_(3)via one-pot hydrothermal process is proposed.The as-prepared Ta-BiOCl/Bi_(24)O_(31)Cl_(10)(TBB)heterojunctions are featured with Ta-Bi_(24)O_(31)Cl_(10)and Ta-BiOCl lined shoulder-by-shouleder via semi-coherent interfaces.In this TBB heterojunctions,the well-matched semi-coherent interfaces and shoulder-by-shoulder structures provide fast electron transfer andmultiple transfer paths,respectively,leading to enhanced visible light response and improved photogenerated charge separation.Meanwhile,a type-II heterojunction for photocharge separation has been obtained,in which photogenerated electrons are drove from the CB(conduction band)of Ta-Bi_(24)O_(31)Cl_(10)to the both of bilateral empty CB of Ta-BiOCl and gathered on the CB of Ta-BiOCl,while the photogenerated holes are left on the VB(valence band)of Ta-Bi_(24)O_(31)Cl_(10),effectively hindering the recombination of photogenerated electron-hole pairs.Furthermore,the separated electrons can effectively activate dissolved oxygen for the generation of reactive oxygen species(·O_(2)^(−)).Such TBB heterojunctions exhibit remarkably superior photocatalytic degradation activity for tetracycline hydrochloride(TCH)solution to Bi_(2)O_(3),Ta-BiOCl and Ta-Bi_(24)O_(31)Cl_(10).This work not only proposes a Ta-BiOCl/Bi_(24)O_(31)Cl_(10)shoulder-by-shoulder micro-ribbon architectures with semi-coherent interfaces and successive type-Ⅱheterojunction for highly efficient photocatalytic activity,but offers a new insight into the design of highly efficient heterojunction through phasestructure synergistic transformation strategy.

关 键 词：HETEROJUNCTION Bismuth oxide Charge separation/transfer Photocatalytic degradation Catalytic mechanism 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]