Photocatalytic properties of TiO2-P2O5 glass ceramics

Binary TiO₂-P₂O₅ glasses with 69 mol% and 76 mol% TiO₂ were prepared and converted into glass ceramics by heat-treatments. XRD measurements show that the main crystalline phases precipitated in the glass ceramics are anatase-type TiO₂ crystals or (TiO)₂P₂O₇ crystals, depending on the concentration of titanium constituent. Photocatalytic activities of the glass ceramics were evaluated by the decomposition of methylene blue (MB) and measuring the water contact angle. It is found that the glass ceramics containing anatase crystals exhibit both photocatalytic oxidation activity and highly photo-induced hydrophilicity under UV irradiation with intensity of 1.0 mW/cm².