Modulating nanograin size and oxygen vacancy of porous ZnO nanosheets by highly concentrated Fe-doping effect for durable visible photocatalytic disinfection  

作　　者：Hong-Yao Zhao Shuo Wang Hong-Yang Zhu Xiao-Xu Zhang Dan-Hong Shang Xin-Wei Zhou Jun Wang Cheng-Zhang Zhu Feng Du Yi-Yan Song Fu Yang 

机构地区：[1]School of Environmental and Chemical Engineering,Jiangsu University of Science and Technology,Zhenjiang 212003,China [2]Department of Otolaryngology Head and Neck Surgery&Center of Sleep Medicine,Shanghai JiaoTong University Affiliated Sixth People's Hospital,Shanghai 200233,China [3]School of Biological and Food Engineering,Anhui Polytechnic University,Wuhu 241000,China [4]School of Environmental Science and Engineering,Nanjing Tech University,Nanjing 211816,China [5]School of Materials Science and Engineering,Suzhou University of Science and Technology,Suzhou 215009,China [6]Department of Clinical Laboratory,The Fifth People's Hospital of Suzhou,The Affiliated Infectious Diseases Hospital of Soochow University,Suzhou 215000,China

出　　处：《Rare Metals》2024年第11期5905-5920,共16页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.21908085);the Natural Science Foundation of Jiangsu Province;China(No.BK20190961);the National Natural Science Foundation(No.42207474);the Natural Science Foundation of Jiangsu Province(No.BK20210895);the Science and Technology Project of Suzhou(No.SKJY2021138);the Science and Education Revitalizing Youth Project of Suzhou(No.KJXW2020049);Suzhou Hospital Association Infection Management Special Research(No.SZSYYXH-2023-ZY1);Suzhou Municipal Health Commission Expert Team Introduction Project(No.SZYJTD201904);Jiangsu Provincial Key Laboratory of Environmental Science and Engineering(No.JSHJZDSYS-202103)。

摘　　要：Visible light-driven environmentally friendly ZnO semiconductor for durable photocatalytic disinfection and purification of drinking water is very promising.However,the high requirement in ultraviolet absorption and rapid recombination velocity of the photogenerated electron-hole severely hamper the sustainable implementation of ZnO in photocatalysis.Herein,by one"two birds with one stone"strategy,Fe-doping ZnO porous nanosheets(Fe-ZnOPN)composed of ultrafine nanoparticles can be constructed by hydrothermal synthesis of basic zinc carbonate and controlled low-temperature pyrolytic methods.By highly concentrated Fe-doping effect(>7 wt%),the tailoring ZnO nanograin size(~10 nm)and rich oxygen vacancy of catalyst were accessed by ion/vacancy diffusion and nanocrystal rearrangement,superior to the ZnO porous nanosheets(~37 nm).The obtained Fe-ZnOPN were endowed with a larger specific surface area,improved visible light harvesting ability,light response and separation of charge carriers.Such characters allowed the resulting catalyst to afford a 100%bactericidal efficiency against Pseudomonas aeruginosa and Staphylococcus aureus under visible light irradiation(>420 nm).Impressively,the Fe-ZnOPN could show practical disinfection ability in different water resources and multiple reuse ability.The mechanism study revealed that excellent photocatalytic disinfection performance of Fe-ZnOPN correlated with the in situ generated active oxidative substances,destruction of bacterial biofilm and resulting nucleic acids leakage,thereby causing irreversible physical damage.This study provided a new reference for designing environmentally friendly photocatalytic sterilization materials and disinfectants,which can be used in the practical disinfection of drinking water.

关 键 词：Photocatalytic disinfection ZnO porous nanosheet Oxygen vacancy Fe doping Practical water disinfection 

分 类 号：TU991.25[建筑科学—市政工程] O643.36[理学—物理化学] O644.1[理学—化学]