title: Photocatalytic degradation of acridine dyes using anatase and rutile TiO2.
abstract: The adsorption and photodegradation of acridine orange (AO) and acriflavine (AF) dyes on two mesoporous titania crystalline phases, anatase and rutile, were experimentally studied. Anatase and rutile were characterized by nitrogen adsorption, electron scanning and transmission microscopy, and X-ray diffraction. The adsorption capacity of rutile was higher than that of anatase, while the reverse is observed for photodegradation of both dyes. The adsorption of AF on both adsorbents was higher than that of AO, which was related with the smaller size of AF molecules compared with those of AO, therefore the access of AF to the adsorption sites is favored.
authors.affiliation: IFISUR, Universidad Nacional del Sur, Av. Alem 1253, Bahía Blanca, Argentina.
authors.forename: C E
authors.initials: CE
authors.lastname: Zubieta
authors.forename: P V
authors.initials: PV
authors.lastname: Messina
authors.forename: P C
authors.initials: PC
authors.lastname: Schulz
mesh_terms: D000165:Acridine Orange / Q000737:chemistry*; D000167:Acriflavine / Q000737:chemistry*; D000327:Adsorption; D005456:Fluorescent Dyes / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D009584:Nitrogen / Q000737:chemistry; D055668:Photochemical Processes; D012996:Solutions / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D014025:Titanium / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D014961:X-Ray Diffraction
chemical_list: D005456:Fluorescent Dyes; D012996:Solutions; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D000167:Acriflavine; D014025:Titanium; D000165:Acridine Orange; D009584:Nitrogen