| Autor: |
González-Ramírez DF; a Department of Biotechnology and Bioengineering , Research Center and Advanced Studies of the National Polytechnic Institute , Mexico City , México., Ávila-Pérez P; b National Institute of Nuclear Research, Direction of Technological Research , State of Mexico , México., Torres-Bustillos LG; c Department of Bioprocesses, Interdisciplinary Professional Unit of Biotechnology , National Polytechnic Institute , Mexico City , México., Aguilar-López R; a Department of Biotechnology and Bioengineering , Research Center and Advanced Studies of the National Polytechnic Institute , Mexico City , México., Montes-Horcasitas MC; a Department of Biotechnology and Bioengineering , Research Center and Advanced Studies of the National Polytechnic Institute , Mexico City , México., Esparza-García FJ; a Department of Biotechnology and Bioengineering , Research Center and Advanced Studies of the National Polytechnic Institute , Mexico City , México., Rodríguez-Vázquez R; a Department of Biotechnology and Bioengineering , Research Center and Advanced Studies of the National Polytechnic Institute , Mexico City , México. |
| Abstrakt: |
Surface interactions with pollutants and photons are key factors that affect the applications of TiO 2 in 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 TiO 2 -C-Ag film in phenanthrene (PHE) removal. Fiberglass with TiO 2 -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 TiO 2 , 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 TiO 2 CAg film surface. X-ray photoelectron spectroscopy of the TiO 2 -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 Ag 0 to Ag 3+ . |
