Chemically bonded Mn_(0.5)Cd_(0.5)S/BiOBr S-scheme photocatalyst with rich oxygen vacancies for improved photocatalytic decontamination performance  

作　　者：Shijie Li Changjun You Ke Rong Chunqiang Zhuang Xiaobo Chen Bin Zhang 

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 Food Science and Pharmacy,Zhejiang Ocean University,Zhoushan 316022,China [2]Institute of Microstructure and Property of Advanced Materials,Faculty of Materials and Manufacturing,Beijing University of Technology,Beijing 100124,China [3]Department of Chemistry,University of Missouri,Kansas City,MO 64110,USA

出　　处：《Advanced Powder Materials》2024年第3期12-22,共11页先进粉体材料（英文）

基　　金：supported by the National Natural Science Foundation of China(U1809214);the Natural Science Foundation of Zhejiang Province(LY20E080014 and LTGN23E080001);the Science and Technology Project of Zhoushan(2022C41011).

摘　　要：Devising exceptional S-scheme heterojunction photocatalysts utilized in annihilating pharmaceuticals and chromium contamination is significant for addressing the problem of global water pollution.In this work,a chemically bonded Mn0.5Cd_(0.5)S/BiOBr S-scheme heterostructure with oxygen vacancies is ingeniously developed through a facile in-situ solvothermal synthesis.The designed Mn0.5Cd_(0.5)S/BiOBr heterojunction exhibits eminently reinforced photo-activity for destruction of tetracycline hydrochloride and Cr(VI)as compared with its individual components.This substantial photo-redox performance amelioration is benefitted from the creation of an intense internal electric field(IEF)via supplying powerful driving force and migration highway by interfacial chemical bond to foster the S-scheme electron/hole disintegration.More intriguingly,the IEF at the hetero-interface drives the fast consumption of the photo-induced holes in Mn0.5Cd_(0.5)S by the photoelectrons from BiOBr,profoundly boosting the enrichment of active photo-carriers and sparing the photo-corrosion of Mn0.5Cd_(0.5)S.Furthermore,Mn0.5Cd_(0.5)S/BiOBr with exceptional anti-interference property can work efficiently in real water matrices.Multiple uses of the recycled Mn0⋅5Cd0⋅5S/BiOBr evidence its prominent robustness and stability.This achievement indicates the vast potential of chemically bonded S-scheme photosystems with structural defects in the design of photo-responsive materials for effective wastewater treatment.

关 键 词：Mn_(0.5)Cd_(0⋅5)S/BiOBr Chemically bonded S-Scheme Internal electric field Oxygen vacancies Antibiotic removal Photocatalysis 

分 类 号：O64[理学—物理化学]