Use of visible light. Second-generation titanium oxide photocatalysts
prepared by the application of an advanced metal ion-implantation method*
Masakazu Anpo
Department of Applied Chemistry, Graduate School of
Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Sakai, Osaka
599-8531, Japan
Abstract: Titanium oxide catalysts were implanted with various
transition-metal ions by a high-voltage acceleration technique, then
calcined in O2 at around 723 K to produce photocatalysts
capable of absorbing visible light, the extent of the red shift depending
on the amount and kind of metal ions implanted. Such metal ion-implanted
titanium oxide photocatalysts, specifically using Cr or V ions, were
successful in carrying out various photocatalytic reactions such as
the decomposition of NO into N2, O2, and N2O
at 293 K, significantly under irradiation with visible light longer
than 450 nm. In outdoor field tests, these Cr and V ion-implanted titanium
oxide photocatalysts showed three to four times higher photocatalytic
reactivity for the decomposition of NO under solar beam irradiation,
as compared with the original unimplanted titanium oxide photocatalyst.
*Lecture presented at the 13th International
Conference on Organic Synthesis (ICOS-13), Warsaw, Poland,1 -5 July
2000.
Back to Contents for access to full text
Page last modified 22 January 2001.
Copyright ©2000-2001 International Union of Pure and Applied Chemistry.
Questions or comments about IUPAC, please contact, the Secretariat.
Questions regarding the website, please contact web
manager.