title: Preparation of gold/silver/titania trilayered nanorods and their photocatalytic activities.
abstract: Gold/silver/titania trilayered nanorods have been prepared by the successive deposition of silver and titania layers on gold nanorod cores, and their photocatalytic activities were investigated under visible-light illumination (λ > 420 nm). The photocatalytic activity of the trilayered nanorods in the oxidation of 2-propanol depends on both the Au/Ag composition and the thickness of the TiO2 shell. It increases with increasing Ag content up to [Au]/[Ag] = 1:5 (molar ratio) and then decreases with further increasing Ag content. The photocatalytic activity also increases with increasing TiO2 shell thickness up to 10 nm and then decreases with further increases in the shell thickness. These effects were explained by electron-transfer and energy-transfer mechanisms.
authors.affiliation: Department of Pure and Applied Chemistry and ‡Research Institute for Science and Technology, Tokyo University of Science , 2641 Yamazaki, Noda 278-8510 Japan.
authors.forename: Yoshimasa
authors.initials: Y
authors.lastname: Horiguchi
authors.forename: Takashi
authors.initials: T
authors.lastname: Kanda
authors.forename: Kanjiro
authors.initials: K
authors.lastname: Torigoe
authors.forename: Hideki
authors.initials: H
authors.lastname: Sakai
authors.forename: Masahiko
authors.initials: M
authors.lastname: Abe