Super-hydrophilic SiO2-doped TiO2 photocatalysts for self-cleaning applications
نویسندگان
چکیده
The self-cleaning of glasses can be realized by coating the photoinduced super-hydrophilic nanoporous thin films based on TiO2 photocatalysts via sol–gel route. In this study, a new method to enhance the photocatalytic activity of TiO2 thin films direct coated on the glass was developed by doping SiO2 in the films. The effects of post-annealing and the SiO2 content of TiO2 film on the photocatalytic activity were investigated. The microstructure and hydrophilic properties of the film were studied using differential X-ray diffraction, scanning electron microscope and contact angle measurement. After illuminated by ultraviolet light, the SiO2 doped TiO2 film are superhydrophilic with water contact angle less than 1°, which favors greatly the self-cleaning function of the films.
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