Synthesis and Characterization of Refluxed Sols and TiO2 Thin Films Using TiOSO4
Nano anatase TiO2 thin films on glass slide substrates were prepared via a dip-coating method using refluxed sols (RS) as precursors, then dried under infrared light and calcined at 500°C for 30min. The RS sols and TiO2 films were characterized by FT-IR, XRD, TEM, UV-Vis and SEM. The photocatalytic activities of the film samples were tested by the degradation of methyl orange solution with a concentration of 10mg/L under UV light irradiation. The results reveal that the RS sols are flavescent, alkalescent and contain needle-like anatase crystals. The TiO2 films are uniform, compact and transparent, their maximal light transmittance exceed 80% under visible light region. The degradation of methyl orange results illustrate that the RS-6 TiO2 thin films show the best photocatalytic activities, the decoloration rate of the methyl orange solution with RS-6 TiO2 thin films reachs 99% after irradiated 160min under UV light.
Wei Pan and Jianghong Gong
L. Ge, M. X. Xu, H. B. Fang, M. Sun, "Synthesis and Characterization of Refluxed Sols and TiO2 Thin Films Using TiOSO4", Key Engineering Materials, Vols. 336-338, pp. 2189-2192, 2007