Molybdenum doped titanium dioxide photocatalytic coatings for use as hygienic sufaces: The effect of soiling on antimicrobial activity

L. Fisher, S. Ostovapour, P. Kelly, K.A. Whitehead, K. Cooke, Erna Storgårds, J. Verran (Corresponding Author)

Research output: Contribution to journalArticleScientificpeer-review

21 Citations (Scopus)

Abstract

Titanium dioxide (TiO2) surfaces doped with molybdenum (Mo) were investigated to determine if their photocatalytic ability could enhance process hygiene in the brewery industry. Doping TiO2 with Mo showed a 5-log reduction in bacterial counts within 4 to 24 h and a 1-log reduction in yeast numbers within 72 h. The presence of a dilute brewery soil on the surface did not interfere with antimicrobial activity. The TiO2–M surface was also active in the dark, showing a 5-log reduction in bacteria within 4 to 24 h and a 1-log reduction in yeast numbers within 72 h, suggesting it could have a novel dual function, being antimicrobial and photocatalytic. The study suggests the TiO2–Mo coating could act as a secondary barrier in helping prevent the build-up of microbial contamination on surfaces within the brewery industry, in particular in between cleaning/disinfection regimes during long production runs.
Original languageEnglish
Pages (from-to)911-919
Number of pages8
JournalBiofouling
Volume30
Issue number8
DOIs
Publication statusPublished - 2014
MoE publication typeA1 Journal article-refereed

Keywords

  • photochemistry
  • antimicrobial activity
  • breweries
  • coatings
  • catalysts
  • molybdenum
  • titanium dioxide

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