Journal
CATALYSIS LETTERS
Volume 67, Issue 2-4, Pages 135-137Publisher
SPRINGER
DOI: 10.1023/A:1019065521567
Keywords
TiO2 thin film photocatalyst; ionized cluster beam deposition method; ion implantation; visible light; decomposition reaction of NO
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Transparent TiO2 thin film photocatalysts were prepared on transparent porous Vycor glass (PVG) by the ionized cluster beam (ICB) method. In order to improve the photocatalytic performance of these thin films under visible light irradiation, transition metal ions such as Cr and V were implanted into the deep bulk inside of the films using an advanced metal-ion-implantation technique. The UV-vis absorption spectra of these metal-ion-implanted TiO2 thin films were found to shift smoothly toward visible light regions, its extent depending on the amount and kinds of metal ions implanted. Using these metal-ion-implanted TiO2 thin films as photocatalysts, the photocatalytic decomposition of NOx into N-2 and O-2 was successfully carried out under visible light (lambda > 450 nm) irradiation at 275 K.
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