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  • Title: Photocatalytic activity of surface fluorinated TiO2-P25 in the degradation of Reactive Orange 4.
    Author: Vijayabalan A, Selvam K, Velmurugan R, Swaminathan M.
    Journal: J Hazard Mater; 2009 Dec 30; 172(2-3):914-21. PubMed ID: 19733965.
    Abstract:
    Photocatalytic activity of surface fluorinated TiO(2)-P25 (F-TiO(2)-P25) in the degradation of a chlorotriazine azo dye Reactive Orange 4 (RO 4) under ambient conditions was investigated in this study. Characterization of F-TiO(2)-P25 reveals that the catalyst has a strong absorption in the UV range and the presence of F atom in the catalyst. The degradation rate of RO 4 with surface fluorinated TiO(2)-P25 is three times faster than bare TiO(2)-P25. The quantum yield of UV/TiO(2)-P25 process is largely decreased by the increase of initial dye concentration, whereas in UV/F-TiO(2)-P25 process, the influence of initial dye concentration is less. Surface fluorination of TiO(2)-P25 enhanced the adsorption of RO 4 dye, while improving overall degradation rate. The optimum operating conditions of UV/F-TiO(2)-P25 process for efficient degradation are reported.
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