title: Photocatalytic activity of surface fluorinated TiO2-P25 in the degradation of Reactive Orange 4.
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.
authors.affiliation: Department of Chemistry, Annamalai University, Annamalainagar 608002, India.
authors.forename: A
authors.initials: A
authors.lastname: Vijayabalan
authors.forename: K
authors.initials: K
authors.lastname: Selvam
authors.forename: R
authors.initials: R
authors.lastname: Velmurugan
authors.forename: M
authors.initials: M
authors.lastname: Swaminathan
mesh_terms: D000327:Adsorption; D001391:Azo Compounds / Q000737:chemistry* / Q000528:radiation effects; D002384:Catalysis; D054879:Halogenation; D055668:Photochemical Processes; D013463:Sulfuric Acid Esters / Q000737:chemistry* / Q000528:radiation effects; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000528:radiation effects
chemical_list: D001391:Azo Compounds; D013463:Sulfuric Acid Esters; D014874:Water Pollutants, Chemical; C109260:reactive orange; C009495:titanium dioxide; D014025:Titanium