Coating of ZnO nanoparticles onto the inner pore channel surface of SiC foam to fabricate a novel antibacterial air filter material

被引:44
作者
Hu, Jian [1 ]
Zhong, Zhaoxiang [1 ]
Zhang, Feng [1 ]
Xing, Weihong [1 ]
Low, Ze-Xian [1 ]
Fan, Yiqun [1 ]
机构
[1] Nanjing Tech Univ, State Key Lab Mat Oriented Chem Engn, Natl Engn Res Ctr Special Separat Membrane, Nanjing 210009, Jiangsu, Peoples R China
基金
中国国家自然科学基金;
关键词
ZnO nanoparticles; SiC foam; Antibacterial air filter; Gas permeability; ZINC-SILICATE; THIN-FILMS; GAS; FILTRATION; COMPOSITE; FACILE; SILVER; PHOTOLUMINESCENCE; DEGRADATION; TEMPERATURE;
D O I
10.1016/j.ceramint.2015.02.016
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
ZnO nanoparticles layer was successfully and firmly coated onto the surface of the pore channel of SiC foam via a sol-gel method in the presence of a negative pressure suction to fabricate a novel anti-bacterial air filter material. Composition, structure and morphology of the coated ZnO were characterized by scanning electron microscope, X-ray diffraction, transmission electron microscopy, energy dispersive spectroscopy and X-ray photoelectronic spectroscopy. A possible formation mechanism of ZnO was proposed. A high crystallized ZnO nanoparticles layer was formed when the calcination temperature exceeds 500 degrees C. The coated ZnO crystallites were hexagonal wurtzite and the grain size was in the range of 20-50 nm. No evident N-2 permeability difference was detected in gas permeation tests before and after ZnO nanoparticles coating. ZnO-coated SiC foam was found to exhibit an excellent anti-bacterial property with sterilization rate of Escherichia coli exceeding 99.8% for all modified samples. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码:7080 / 7090
页数:11
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