Photocatalysis and Hydrophilicity of y3+ Doped TiO2 Thin Films

摘要

Y3+ doped TiO2 coatings were successfully prepared on glass slide substrates.The phase structure,optical properties,microstructure and surface properties of the coatings were characterized by using XRD,FT-IR,UV-vis and SEM.The photoinduced super-hydrophilicity and photocatalytic activity of the films were evaluated by the water contact angle measurement and photocatalytic oxidation of Rhodamine B in air,respectively.The results indicated that the doping of Y3+ into TiO2 could improve the hydrophilicity and photocatalytic activity,and TiO2 thin films doped with Y3+ at 2-4 at.％ and heat-treated at 450 °C were of super-hydrophilicity.The optimal y3+ content for the photocatalytic activity was 4 at.％ and larger film thickness was helpful to reduce the contact angle of the composite films.