Enhanced antibiotic degradation performance of Cd_(0.5)Zn_(0.5)S/Bi_(2)MoO_(6) S-scheme photocatalyst by carbon dot modification  

作　　者：Shijie Li Ruyu Yan Mingjie Cai Wei Jiang Mingyi Zhang Xin Li 

机构地区：[1]Key Laboratory of Health Risk Factors for Seafood of Zhejiang Province,National Engineering Research Center for Marine Aquaculture,College of Marine Science and Technology,Zhejiang Ocean University,Zhoushan 316022,China [2]Key Laboratory for Photonic and Electronic Bandgap Materials,Ministry of Education,School of Physics and Electronic Engineering,Harbin Normal University,Harbin 150025,China [3]Institute of Biomass Engineering,Key Laboratory of Energy Plants Resource and Utilization,Ministry of Agriculture and Rural Affairs,South China Agricultural University,Guangzhou 510642,China

出　　处：《Journal of Materials Science & Technology》2023年第33期59-67,共9页材料科学技术（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos.U1809214 and 51708504);the Natural Science Foundation of Zhejiang Province (Nos.LY20E080014 and LTGN23E080001);the Zhejiang Province Industrial Innovation Service Complex "Opening list and Hanging" Project (No.YY-2021C1006);and the Science and Technology Project of Zhoushan (No.2022C41011).

摘　　要：S-scheme heterojunction engineering is an effective strategy to attain distinctive photocatalysts.Herein,a carbon dots modulated S-scheme hetero-structured photocatalyst of Cd_(0.5)Zn_(0.5)S nanoparticles/Bi_(2)MoO_(6) microspheres/carbon dots (CZCBM),aiming to conquer the photo-corrosion and strengthen the photocatalytic property of Cd_(0.5)Zn_(0.5)S,was developed via a facile solvothermal route.Under visible light,the optimal CZCBM-2 affords a 1.8-,1.5-,or 0.6-time reinforcement in the oxytetracycline degradation rate constant compared to Bi_(2)MoO_(6),Cd_(0.5)Zn_(0.5)S or Cd_(0.5)Zn_(0.5)S/Bi_(2)MoO_(6),which is credited to the strengthened visible-light response,increased reactive sites,and efficient dissolution of photo-carriers with optimal redox capacity because of the co-effect of carbon dots and S-scheme heterostructure.Significantly,the photo-corrosion of Cd_(0.5)Zn_(0.5)S is significantly suppressed and CZCBM-2 affords superior stability and reusability during cycling tests.Besides,CZCBM-2 can be well adapted to various environments.The toxicology appraisement unravels the decreased eco-toxicity of most intermediates compared to oxytetracycline.Lastly,an S-scheme charge transfer mechanism with carbon dots as electron reservoir in CZCBM is deduced,which uncloses that •O_(2)− and h+ dominantly account for oxytetracycline eradication and detoxification.This study demonstrates the design of unique carbon dots favored S-scheme heterostructures as an effective “Two Birds with One Stone” strategy to achieve high anti-photo-corrosion performance and reinforced photocatalytic performance of sulfides.

关 键 词：Carbon dots S-scheme heterojunction Synergistic effect Pharmaceuticals and personal care products(PPCPs) Toxicity analysis Anti-photocorrosion 

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]