TY - JOUR
T1 - Removal of phenanthrene in aqueous solution containing photon competitors by TiO2–C–Ag film supported on fiberglass
AU - González-Ramírez, Denisse Fabiola
AU - Ávila-Pérez, Pedro
AU - Torres-Bustillos, Luis G.
AU - Aguilar-López, Ricardo
AU - Montes-Horcasitas, María C.
AU - Esparza-García, Fernando J.
AU - Rodríguez-Vázquez, Refugio
N1 - Publisher Copyright:
© 2017 Taylor & Francis Group, LLC.
PY - 2017/7/3
Y1 - 2017/7/3
N2 - Surface interactions with pollutants and photons are key factors that affect the applications of TiO2 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 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 Ag0 to Ag3+.
AB - Surface interactions with pollutants and photons are key factors that affect the applications of TiO2 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 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 Ag0 to Ag3+.
KW - Cosolvent
KW - doping
KW - heterogeneous catalysis
KW - hydrocarbons
KW - nanocomposite
KW - surfactant
UR - http://www.scopus.com/inward/record.url?scp=85017229874&partnerID=8YFLogxK
U2 - 10.1080/10934529.2017.1303311
DO - 10.1080/10934529.2017.1303311
M3 - Artículo
C2 - 28394702
SN - 1093-4529
VL - 52
SP - 742
EP - 749
JO - Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
JF - Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
IS - 8
ER -