Antimicrobial Materials for Water Disinfection Based on Visible-Light Photocatalysts
Wu, Pinggui
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https://hdl.handle.net/2142/82816
Description
Title
Antimicrobial Materials for Water Disinfection Based on Visible-Light Photocatalysts
Author(s)
Wu, Pinggui
Issue Date
2007
Doctoral Committee Chair(s)
Zhong, Sheng
Department of Study
Materials Science and Engineering
Discipline
Materials Science and Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Materials Science
Language
eng
Abstract
The photocatalytic property of these visible-light-active photocatalysts were studied in the inactivation of bacteria and bacterial spores in water. Fast killing rate was obtained for the inactivation of E. coli, P. aeruginosa, S. aureus and B. subtilis endospores. The results of mechanistic study provided evidence of oxidative damages, and indicated that hydroxyl radicals are one of the key killing species. Atomic force microscopy and electron microscopy showed that the cell walls were attacked by photocatalytic inactivation. The potential application of the photocatalyst in water disinfection was demonstrated by flow-through tests.
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