EFFECT OF AG DOPED ON PHOTOCATALYTIC AND ANTIBACTERIAL ACTIVITY OF TIO2 THIN FILMS

Abstract

In the present study, The Ag-doped TiO₂ thin films (0, 0.5 and 1 mol% of Ag) coated on glass slide prepared by microwave-assisted sol-gel route. The microstructures of the fabricated thin films were characterized by SEM, XRD, EDS and AFM techniques, and the results showed that all samples were anatase and rutile phase. The photocatalytic activities of the Ag-doped TiO₂ thin films were also tested via the degradation of MB solution under UV irradiation and the results were compared with pure TiO₂. The antibacterial activity of Ag-doped TiO₂ thin films was assessed by spread plate method against E.coli as test bacteria under UV irradiation and the results were compared with pure TiO₂. The results show that Ag-doped TiO₂ thin films exhibits greater photocatalytic and antibacterial activity than those of pure TiO₂. It was found that the bacterial inactivation of the prepared Ag-doped TiO₂ thin films correlates closely to photocatalytic activity preformed by degradation of MB solution. In addition, 1%Ag-doped TiO₂ thin films showed photocatalytic and antibacterial activities at 81.43 and 91.02%, respectively.