title: Degradation of Direct Black 38 dye under visible light and sunlight irradiation by N-doped anatase TIO₂ as photocatalyst.
abstract: The N-doped TiO(2) photocatalyst was prepared by calcination of a hydrolysis product composed of titanium (IV) isopropoxide with ammonia as the precipitator. X-ray diffraction, surface area, XPS and UV-vis spectra analyses showed a nanosized anatase structure and the appearance of a new absorption band in the visible region caused by nitrogen doping. The degradation of Direct Black 38 dye on the nitrogen-doped TiO(2) photocatalyst was investigated under visible light and sunlight irradiation. The N-doped anatase TiO(2) demonstrated excellent photocatalytic activity under visible light. Under sunlight irradiation, the N-doped sample showed slightly higher activity than that of the non-doped sample.
authors.affiliation: Department of Chemical Engineering, Federal University of Santa Maria, 97105-900, Santa Maria, RS, Brazil. gabicollazzo@yahoo.com.br
authors.forename: Gabriela Carvalho
authors.initials: GC
authors.lastname: Collazzo
authors.forename: Edson Luiz
authors.initials: EL
authors.lastname: Foletto
authors.forename: Sérgio Luiz
authors.initials: SL
authors.lastname: Jahn
authors.forename: Marcos Antônio
authors.initials: MA
authors.lastname: Villetti
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D002384:Catalysis; D010782:Photolysis; D013056:Spectrophotometry, Ultraviolet; D013472:Sunlight; D014025:Titanium / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D001391:Azo Compounds; C009495:titanium dioxide; C015844:direct black 3; D014025:Titanium