Preparation of photocatalytic TiO2?SiO2 thin film by sol-gel coating

TiO₂−SiO₂ composite thin films for photocatalysis were fabricated on window glass with sol-gel technology. By measuring the contact angle of the film surface and the degradation of methylene blue, the super-hydrophilicity and photocatalytic activity of the composite thin films were studied. The results indicate that the TiO₂−SiO₂ composite thin film can yield various glass self-cleaning effects with low maintenance expenses.