Position: Home > Articles > Preparation of Hierarchical Microsphere BiOBr Catalyst and Its Photocatalytic Disinfection Performance Under Visible Light
Biotechnology Bulletin
2016,32
(8)
242-248
分级微球BiOBr光催化材料制备及可见光灭菌性能研究
作 者：
王亚;林立;李贝贝;黄满红;陈亮
单 位：
东华大学环境科学与工程学院
关键词：
BiOBr;可见光;光催化灭菌;大肠杆菌
摘 要：
采用溶剂热法一步合成3D分级微球BiOBr,利用SEM、XRD和UV-vis等手段对其进行表征,考察所制备的BiOBr光催化材料在可见光下对大肠杆菌的灭菌性能,并初步探讨了其杀菌机理。结果表明,制备的BiOBr为直径为2μm左右的微球,且在可见光下有较好的光响应。灭菌实验表明,BiOBr在可见光(λ>420 nm)照射下对革兰氏阴性菌大肠杆菌(E.coli)有较高的灭菌活性,0.5 mg/m L BiOBr时可见光照射12 h后,杀菌率可达70%以上。活性基团捕获实验表明,3D分级微球BiOBr通过空穴氧化破坏细菌的细胞膜和细胞壁,达到可见光下杀灭细菌的目的。
译 名：
Preparation of Hierarchical Microsphere BiOBr Catalyst and Its Photocatalytic Disinfection Performance Under Visible Light
作 者：
WANG Ya;LIN Li;LI Bei-bei;HUANG Man-hong;CHEN Liang;State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry,College of Environmental Science and Engineering,Donghua University;School of Chemical and Environmental Engineering,Hunan City University;
关键词：
BiOBr;;visible light irradiation;;photocatalytic disinfection;;Escherichia coli
摘 要：
The BiOBr,three-dimensional hierarchical microsphere,was successfully fabricated by one-pot solvent-thermal method,and was characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD) and UV-vis.Performance of photocatalytic disinfection of Escherichia coli using BiOBr under visible light irradiation was studied,also the disinfection mechanism was explored.The results showed that the BiOBr was microsphere with diameter of about 2 μm,and had solid visible light response.Sterilization experiments showed that the BiOBr presented the enhanced photocatalytic inactivation of gram-negative bacterium E.coli under visible light irradiation(λ>420 nm).The disinfection rate reached over 70%with the 0.5 mg/mL photocatalytic materials for 12 h visible light irradiation.Reactive capture experiments demonstrated that 3D hierarchical microspheres BiOBr destroyed bacterial cell membranes and walls via hole oxidation,therefore achieved the purpose of killing bacteria under visible light.
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