TiO2 nanoparticles undergo a single-phase transition: from amorphous to anatase when calcined at 450?C. It can be noticed from\r\nthe XRD and AFM results that the particle size of TiO2 is below 30 nm. Results from viscometer and UV-Vis analysis showed that\r\nthe film thickness is closely related to the viscosity of dip-coating solutions. It was found that the contact angle for water decreased\r\nafter being illuminated with UV light at certain periods of time. This indicates that these films exhibit hydrophilic properties\r\nthat can be used on self-cleaning surfaces and antifogging mirrors. Heterogeneous photocatalytic oxidation allows the oxidation\r\nof airborne volatile organic compounds (VOCs) into carbon dioxide and water in the presence of a semiconductor catalyst and\r\nUV light source. Titanium dioxide, due to its chemical stability, nontoxicity, and low cost, represents one of the most efficient\r\nphotocatalysts. Photocatalytic activity of the TiO2 thin films was evaluated by using toluene and results showed that this film is\r\nsuccessful in decomposing toluene.
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