title: Sprayed nanostructured TiO2 films for efficient photocatalytic degradation of textile azo dye.
abstract: Spray pyrolysis procedure for preparation of nanostructured TiO(2) films with higher photocatalytic effectiveness and longer exploitation life is presented in this study. Thin films of active nanocrystalline TiO(2) were obtained from titanium isopropoxide, stabilized with acetyl acetone and characterized by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The activity of sprayed nanostructured TiO(2) is tested for photocatalytic degradation of Reactive Black 5 dye with concentrations up to 80 ppm. Interesting result of the work is the reduction of toxicity after photocatalytic treatment of RB5 with TiO(2), which was confirmed by the lower percentage of mortality of Artemia salina. It was proved that the film thickness, conditions of post deposition treatment and the type of the substrate affected significantly the photocatalytic reaction. Taking into account that the parameters are interdependent, it is necessary to optimize the preparation conditions in order to synthesize photocatalytic active films.
authors.affiliation: Institute of General and Inorganic Chemistry, BAS, Acad. G. Bonchev St., Bl. 11, 1113 Sofia, Bulgaria. stambolova@yahoo.com
authors.forename: Irina
authors.initials: I
authors.lastname: Stambolova
authors.forename: Capital Em Cyrillicaria
authors.initials: CE
authors.lastname: Shipochka
authors.forename: Vladimir
authors.initials: V
authors.lastname: Blaskov
authors.forename: Alexandrе
authors.initials: A
authors.lastname: Loukanov
authors.forename: Sasho
authors.initials: S
authors.lastname: Vassilev
mesh_terms: D000818:Animals; D001156:Artemia / Q000187:drug effects; D001391:Azo Compounds / Q000737:chemistry* / Q000633:toxicity; D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry* / Q000633:toxicity; D049329:Nanostructures / Q000737:chemistry*; D009282:Naphthalenesulfonates / Q000737:chemistry / Q000633:toxicity; D010084:Oxidation-Reduction; D055668:Photochemical Processes; D013696:Temperature; D013784:Textiles; D014025:Titanium / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D004396:Coloring Agents; D009282:Naphthalenesulfonates; C009495:titanium dioxide; D014025:Titanium; C063421:Remazol black B