Augmenting reactive species over MgIn_(2)S_(4)-In_(2)O_(3) hybrid nanofibers for efficient photocatalytic antibacterial activity  

作　　者：Lina Wang Peiyi Yan Huairui Chen Zhuo Li Shu Jin Xiaoxiang Xu Jun Qian 

机构地区：[1]Clinical and Central Lab,Putuo People’s Hospital,Tongji University,Shanghai 200060,China [2]Department of Neurosurgery,Tongji Hospital,School of Medicine,Tongji University,Shanghai 200065,China [3]Shanghai Key Lab of Chemical Assessment and Sustainability,School of Chemical Science and Engineering,Tongji University,Shanghai 200092,China [4]College of Environment Science and Engineering,Tongji University,Shanghai 200092,China

出　　处：《Journal of Materials Science & Technology》2024年第9期83-90,共8页材料科学技术（英文版）

基　　金：National Natural Science Foundation of China(Grant Nos.51972233,52172225);the Science and Technology Commission of Shanghai Municipality(Grant No.19DZ2271500);the Fundamental Research Funds for the Central Universities for funding.

摘　　要：Narrow bandgap semiconductor MgIn_(2)S_(4) has been readily grown onto In_(2)O_(3) nanofibers by an in situ growing method.The so-formed MgIn_(2)S_(4)-In_(2)O_(3) hybrid nanofibers are characterized by strong visible light absorption and intimate MgIn_(2)S_(4)/In_(2)O_(3) heterointerfaces.Under visible light illumination(λ≥400 nm),the hybrid nanofibers demonstrate an exceptionally high photocatalytic activity for Escherichia coli(E.coli)disinfection,outcompeting pristine MgIn_(2)S_(4),naked In_(2)O_(3) nanofibers,and many other photocatalytic systems reported.Specifically,the hybrid nanofibers achieve a 7 log reduction in viable cells for merely 20 min illumination while pristine MgIn_(2)S_(4) and naked In_(2)O_(3) nanofibers alone are almost inactive.Further analysis indicates that the hybrid nanofibers essentially form a type-II semiconductor heterojunctions which enable spatial separation of photocarriers.Owing to the intimate heterointerfaces,photocarriers can be promptly separated and accumulated respectively in In_(2)O_(3) and MgIn_(2)S_(4) thereby allowing continuous generation of copious reactive species for disinfection.This work signifies the usefulness of heterointerfaces in promoting photocarrier separation and provides a useful strategy to upgrade photocatalytic performance from otherwise almost inactive semiconductors.

关 键 词：PHOTOCATALYST DISINFECTION Semiconductor fiber HETEROSTRUCTURE Antibacterial activity 

分 类 号：TB383[一般工业技术—材料科学与工程]