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Abstract: In this study, a sol–gel method was successfully developed to synthesize zinc and/or yttrium doped titania powders. The as-prepared materials were characterized by X-ray diffraction pattern (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), UV–Vis diffuse reflectance spectroscopy (DRS) and X-ray photoluminescence (PL) spectroscopy. It was found that the phase structures of as-prepared materials were transformed from anatase TiO2 to rutile TiO2 by elevated calcination temperatures, accompanied with Zn3TiO8, ZnTiO3 and Y2Ti2O7 phases appearance. Photocatalytic antibacterial experimental study implied that zinc and yttrium co-doped titania exhibited better performance than zinc or yttrium doped alone under visible light irradiation. The enhanced photocatalytic effect was ascribed to co-doping of Zn and Y in TiO2. [Copyright &y& Elsevier]

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. [Copyright &y& Elsevier]