title: Molybdenum doped titanium dioxide photocatalytic coatings for use as hygienic surfaces: the effect of soiling on antimicrobial activity.
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-Mo 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.
authors.affiliation: a School of Healthcare Science , Manchester Metropolitan University , Manchester , UK.
authors.forename: L
authors.initials: L
authors.lastname: Fisher
authors.forename: S
authors.initials: S
authors.lastname: Ostovapour
authors.forename: P
authors.initials: P
authors.lastname: Kelly
authors.forename: K A
authors.initials: KA
authors.lastname: Whitehead
authors.forename: K
authors.initials: K
authors.lastname: Cooke
authors.forename: E
authors.initials: E
authors.lastname: Storgårds
authors.forename: J
authors.initials: J
authors.lastname: Verran
mesh_terms: D001419:Bacteria / Q000187:drug effects*; D002384:Catalysis; D004202:Disinfectants / Q000494:pharmacology*; D004203:Disinfection / Q000379:methods*; D004926:Escherichia coli / Q000187:drug effects / Q000502:physiology; D008982:Molybdenum / Q000494:pharmacology*; D010782:Photolysis; D013193:Stainless Steel; D014025:Titanium / Q000494:pharmacology*
chemical_list: D004202:Disinfectants; D013193:Stainless Steel; C009495:titanium dioxide; D008982:Molybdenum; D014025:Titanium
keywords: antimicrobial activity; brewery microorganisms; molybdenum; photocatalytic surfaces; soiling; titanium dioxide