title: Visible light-induced degradation of ethylene glycol on nitrogen-doped TiO2 powders.
abstract: The photocatalytic degradation processes of ethylene glycol (EG) during the UV or visible light irradiation of pure anatase and nitrogen (N)-doped TiO2 powders (TiO(2-x)N(x), x = 0, 0.002, 0.003, and 0.007) were investigated using time-resolved diffuse reflectance (TDR) and solid-state NMR spectroscopies. The TDR spectra and time traces observed for the charge carriers indicated that the scavenging of photogenerated holes (h+) by EG occurred during the 355-nm laser photolysis of the N-doped TiO2 powders, while no direct oxidation reaction of EG by h+ occurred during the 460-nm laser photolysis, although the charge carriers were sufficiently generated upon excitation. The solid-state magic-angle spinning (MAS) NMR measurements revealed that EG is preferentially chemisorbed on the surface of the N-doped TiO2 powders, in contrast to the pure TiO2, and degrades under visible light irradiation.
authors.affiliation: The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8-1, Ibaraki, Osaka 567-0047, Japan.
authors.forename: Takashi
authors.initials: T
authors.lastname: Tachikawa
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Takai
authors.forename: Sachiko
authors.initials: S
authors.lastname: Tojo
authors.forename: Mamoru
authors.initials: M
authors.lastname: Fujitsuka
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Irie
authors.forename: Kazuhito
authors.initials: K
authors.lastname: Hashimoto
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Majima