Photo-Hydrophilicity and Photo-Catalysis of TiO2-SiO2 Coating on Ceramics
Sol-gel coatings of mixed TiO2-SiO2 had been deposited on ceramic substrates by spraycoating technique to study their hydrophilic and photocatalytic behavior on exposure to sunlight or ultraviolet illumination. The range of the films heat-treatment temperature is from 300°C to 500°C. AFM and XRD analysis were used to characterize the crystal structure and surface morphology of these coatings. Hydrophilic property was evaluated by water contact angle measurement under sunlight illumination condition, and photocatalytic activity by decomposition rate of aniline blue under ultraviolet illumination. Attrition resistance experiment was also carried out to test the hardness and adherence strength of these films. The experimental results demonstrate that this coating possesses high photo-activity and excellent adhesion to ceramic substrates.
Wei Pan and Jianghong Gong
H. H. Cai et al., "Photo-Hydrophilicity and Photo-Catalysis of TiO2-SiO2 Coating on Ceramics", Key Engineering Materials, Vols. 336-338, pp. 1796-1798, 2007