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Metal ion and N co-doped TiO2 as a visible-light photocatalyst

Published online by Cambridge University Press:  03 March 2011

Yoshiaki Sakatani ,
Hiroyuki Ando ,
Kensen Okusako ,
Hironobu Koike ,
Jun Nunoshige ,
Tsuyoshi Takata ,
Junko N. Kondo ,
Michikazu Hara  and
Kazunari Domen
Yoshiaki Sakatani
Affiliation:
Basic Chemicals Research Laboratory, Sumitomo Chemical Co., Ltd., 5-1 Sobiraki-cho,Niihama 792-8521, Japan
Hiroyuki Ando
Affiliation:
Basic Chemicals Research Laboratory, Sumitomo Chemical Co., Ltd., 5-1 Sobiraki-cho,Niihama 792-8521, Japan
Kensen Okusako
Affiliation:
Basic Chemicals Research Laboratory, Sumitomo Chemical Co., Ltd., 5-1 Sobiraki-cho,Niihama 792-8521, Japan
Hironobu Koike
Affiliation:
Basic Chemicals Research Laboratory, Sumitomo Chemical Co., Ltd., 5-1 Sobiraki-cho,Niihama 792-8521, Japan
Jun Nunoshige
Affiliation:
Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
Tsuyoshi Takata
Affiliation:
Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
Junko N. Kondo
Affiliation:
Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
Michikazu Hara
Affiliation:
Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
Kazunari Domen
Affiliation:
Chemical Resources Laboratory, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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Abstract

Powders of TiO2 doped with a metal ion and N species were prepared by a polymerized complex method and the visible-light photocatalytic activities of the products are investigated. Of the metal ions studied (K+, Ca2+, Sr2+, Ba2+, Nb5+, Fe3+, Zn2+, and Al3+), the photocatalyst prepared with Sr2+ exhibits the highest activity for acetaldehyde decomposition under visible-light irradiation. Results obtained from x-ray photoelectron spectroscopy (XPS) and electron spin resonance (ESR) analyses suggest that the doped N species reside at interstitial lattice positions in the catalyst. It was also found by XPS and ESR measurements that the doped N species combine with lattice oxygen to give rise to a paramagnetic property. The visible-light response of the catalyst is driven by the formation of paramagnetic N species at interstitial positions in the TiO2 lattice.

Keywords

AdditivesCatalyticCermet
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 7 , July 2004 , pp. 2100 - 2108
Copyright
Copyright © Materials Research Society 2004

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References

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