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

Jian Hu, Zhaoxiang Zhong, Feng Zhang, Weihong Xing, Ze Xian Low, Yiqun Fan

Research output: Contribution to journalArticleResearchpeer-review

26 Citations (Scopus)

Abstract

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 °C. The coated ZnO crystallites were hexagonal wurtzite and the grain size was in the range of 20-50 nm. No evident N2 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.

Original languageEnglish
Pages (from-to)7080-7090
Number of pages11
JournalCeramics International
Volume41
Issue number5
DOIs
Publication statusPublished - 1 Jan 2015
Externally publishedYes

Keywords

  • Antibacterial air filter
  • Gas permeability
  • SiC foam
  • ZnO nanoparticles

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