title: Cobalt Ion-Doped TiO(2) Photocatalyst Response to Visible Light.
abstract: Photocatalytic activity under visible light irradiation was generated by doping a small amount of Co(2+) ions into TiO(2) particles. Nanometer-sized particles with the composition xCoO-(100-x) TiO(2) (xCo/TiO(2); 0</=x</=6.0) were prepared from TiOSO(4).4.5H(2)O and Co(CH(3)COO)(2).4H(2)O in an ethanol-water solution containing NaOH under reflux. The photoreactivity of xCo/TiO(2) was evaluated by the rate of CH(3)CHO degradation. The Co(2+) ion doping (0.01</=x</=0.27) not only enhanced the photocatalytic activity under ultraviolet-visible (lambda>300 nm) light irradiation but also induced the visible light (lambda>400 nm) response. The highest photocatalytic activities were obtained at x=0.03 for both irradiations. Copyright 2000 Academic Press.
authors.affiliation: Department of Applied Chemistry, Faculty of Science and Engineering, Kinki University, 3-4-1 Kowakae, Higashi-Osaka, Osaka, 577-8502, Japan
authors.initials: M
authors.lastname: Iwasaki
authors.initials: M
authors.lastname: Hara
authors.initials: H
authors.lastname: Kawada
authors.initials: H
authors.lastname: Tada
authors.initials: S
authors.lastname: Ito