Photocatalytic disinfection of P.aeruginosa bacterial Ag-doped TiO2 film

TiO2 and TiO2-Ag composites films were prepared by sol–gel method and coated on glass fibre roving. The surface morphology and properties of synthesized composites films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive x-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FT-IR) and UV-vis diffuse reflectance spectroscopy (DRS). The antibacterial activity studies of TiO2 and TiO2 composite films were evaluated by photocatalytic reaction against P.aeruginosa bacteria. The results shown that pure TiO2 and TiO2 porous (TiO2-PEG) films have disinfection efficiency 57% and 93% within 15 min under UV irradiation, respectively. TiO2-1Ag film has highest antibacterial effect under UV irradiation and that disinfectionefficiency is 100% within 10 min. It has been found that Ag doped TiO2 films have the higher disinfection efficiency than that of pure TiO2 due to the effect of silver species.