Efficient visible-light-induced photocatalytic disinfection on sulfur-doped nanocrystalline titania.
Sulfur-doped titanium dioxide exhibits a strong visible-light-induced antibacterial effect. The new photocatalyst can effectively kill Micrococcus lylae, a common Gram-positive bacterium. The relationship between sulfur concentration and the bactericidal activity of S-doped TiO2 was investigated. Results from DMPO spin-trapping electron spin resonance measurements confirm the formation of hydroxyl radicals, which is the origin of the considerable bactericidal activity under visible light irradiation.
Yu
Jimmy C
JC
Departments of Chemistry and Biology, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China. jimyu@cuhk.edu.hk
Ho
Wingkei
W
Yu
Jiaguo
J
Yip
Hoyin
H
Wong
Po Keung
PK
Zhao
Jincai
J
D000900:Anti-Bacterial Agents / Q000494:pharmacology; D002384:Catalysis; D004203:Disinfection; D004578:Electron Spin Resonance Spectroscopy; D017665:Hydroxyl Radical / Q000494:pharmacology*; D008027:Light; D008837:Micrococcus / Q000187:drug effects* / Q000378:metabolism; D008904:Miniaturization; D010777:Photochemistry; D013455:Sulfur / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry* / Q000494:pharmacology; D018508:Water Purification / Q000379:methods
D000900:Anti-Bacterial Agents; C009495:titanium dioxide; D017665:Hydroxyl Radical; D013455:Sulfur; D014025:Titanium