期刊
CERAMICS INTERNATIONAL
卷 41, 期 5, 页码 7080-7090出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2015.02.016
关键词
ZnO nanoparticles; SiC foam; Antibacterial air filter; Gas permeability
资金
- National Natural Science Foundation of China [21125629, 21276124, 21306079]
- Jiangsu Province Scientific Supporting Project [BE2014717]
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.
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