Abstract
Antibacterial activity of zinc-doped titania (Zn/TiO2) nano-materials through different anions (ZnCl2/TiO2, Zn(Ac)2/TiO2, Zn(NO3)2/TiO2 and ZnSO4/TiO2) doped calcinated at 500 °C under visible light irradiation and in the dark was investigated. A simple sol–gel method was used to synthesize TiO2 nano-materials. Samples ZnCl2/TiO2, Zn(Ac)2/TiO2, Zn(NO3)2/TiO2 and ZnSO4/TiO2 exhibit anatase phase TiO2 as the predominant crystalline phase and Zn ions exist in the form of ZnTiO3, Zn2Ti3O8, ZnO or ZnSO4 crystallites. The study on antibacterial effect of Zn/TiO2 nano-materials on fungal Candida albicans (ATCC10231), Gram-negative Escherichia coli (ATCC25922) and Gram-positive Staphylococcus aureus (ATCC6538) shows that the antibacterial action is more significant on C. albicans than on E. coli and S. aureus. Under visible light irradiation, the antibacterial activity is superior to that in the dark.
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