Enhanced photocatalytic disinfection of escherichia coli bacteria by silver modification of nitrogen-doped titanium oxide nanoparticle photocatalyst under visible-light illumination

Caixia Sun, Qi Li, Shian Gao, Lihua Cao, Jian Ku Shang

Research output: Contribution to journalArticle

Abstract

Enhanced photocatalytic disinfection of Escherichia coli (E. coli) bacteria under visible light illumination was achieved by a silver-modified nitrogen-doped titanium oxide (TiON/Ag2O) nanoparticle photocatalyst synthesized by a sol-gel process. In this photocatalytic material system, silver additives are beneficial to achieve better crystallization, larger surface area, higher pore volume, and enhanced visible light absorbance. The enhanced photocatalytic disinfection of E. coli by TiON/Ag2O was proven to be mostly attributed to the photocatalytic response of the TiON matrix and the subsequent coupling between TiON matrix and Ag2O nanoparticles, not the silver addition itself. The optimized silver modification concentration is determined at an Ag:Ti molar ratio of 1:50.

Original languageEnglish (US)
Pages (from-to)3880-3885
Number of pages6
JournalJournal of the American Ceramic Society
Volume93
Issue number11
DOIs
StatePublished - Nov 2010

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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