title: Removal of phenanthrene in aqueous solution containing photon competitors by TiO2-C-Ag film supported on fiberglass.
abstract: Surface interactions with pollutants and photons are key factors that affect the applications of TiO2in environmental remediation. In this study, the solubilizing agents dimethylsulfoxide and polyoxyethylene sorbitan monooleate, which act as photon competitors, had no effect on the photocatalytic activity of TiO2-C-Ag film in phenanthrene (PHE) removal. Fiberglass with TiO2-C-Ag coating removed 91.1 ± 5.2 and 99.7 ± 0.4% of PHE in treatments using UVA (365-465 nm) and UVC (254 nm) irradiation, respectively. The use of fiberglass as a support increased the superficial area, thus allowing PHE sorption. C and Ag, which are electrically active impurities in TiO2, enhanced its photocatalytic activity and thus the attraction of the pollutant to its surface. The use of high-frequency UV light (UVC) decreased the amount of carbon species deposited on the TiO2CAg film surface. X-ray photoelectron spectroscopy of the TiO2-C-Ag film revealed extensive oxidation of the carbon deposited on the film under UVC light and loss of electrons from Ag clusters by conversion of Ag0to Ag3+.
authors.affiliation: a Department of Biotechnology and Bioengineering , Research Center and Advanced Studies of the National Polytechnic Institute , Mexico City , México.
authors.forename: Denisse Fabiola
authors.initials: DF
authors.lastname: González-Ramírez
authors.affiliation: b National Institute of Nuclear Research, Direction of Technological Research , State of Mexico , México.
authors.forename: Pedro
authors.initials: P
authors.lastname: Ávila-Pérez
authors.affiliation: c Department of Bioprocesses, Interdisciplinary Professional Unit of Biotechnology , National Polytechnic Institute , Mexico City , México.
authors.forename: Luis G
authors.initials: LG
authors.lastname: Torres-Bustillos
authors.affiliation: a Department of Biotechnology and Bioengineering , Research Center and Advanced Studies of the National Polytechnic Institute , Mexico City , México.
authors.forename: Ricardo
authors.initials: R
authors.lastname: Aguilar-López
authors.affiliation: a Department of Biotechnology and Bioengineering , Research Center and Advanced Studies of the National Polytechnic Institute , Mexico City , México.
authors.forename: María C
authors.initials: MC
authors.lastname: Montes-Horcasitas
authors.affiliation: a Department of Biotechnology and Bioengineering , Research Center and Advanced Studies of the National Polytechnic Institute , Mexico City , México.
authors.forename: Fernando J
authors.initials: FJ
authors.lastname: Esparza-García
authors.affiliation: a Department of Biotechnology and Bioengineering , Research Center and Advanced Studies of the National Polytechnic Institute , Mexico City , México.
authors.forename: Refugio
authors.initials: R
authors.lastname: Rodríguez-Vázquez
mesh_terms: D000327:Adsorption; D002244:Carbon / Q000737:chemistry* / Q000528:radiation effects; D002384:Catalysis; D004121:Dimethyl Sulfoxide / Q000737:chemistry; D005898:Glass / Q000737:chemistry* / Q000528:radiation effects; D010084:Oxidation-Reduction; D010616:Phenanthrenes / Q000032:analysis*; D056951:Photoelectron Spectroscopy; D017785:Photons; D011136:Polysorbates / Q000737:chemistry; D012834:Silver / Q000737:chemistry* / Q000528:radiation effects; D012995:Solubility; D012996:Solutions; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry* / Q000528:radiation effects; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000032:analysis*; D018508:Water Purification / Q000379:methods*
chemical_list: D010616:Phenanthrenes; D011136:Polysorbates; D012996:Solutions; D014874:Water Pollutants, Chemical; C009753:fiberglass; C009495:titanium dioxide; D012834:Silver; C031181:phenanthrene; D002244:Carbon; D014025:Titanium; D004121:Dimethyl Sulfoxide
keywords: Cosolvent; doping; heterogeneous catalysis; hydrocarbons; nanocomposite; surfactant