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

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+ exhi...

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Bibliographic Details
Published in:Journal of materials research 2004-07, Vol.19 (7), p.2100-2108
Main Authors: Sakatani, Yoshiaki, Ando, Hiroyuki, Okusako, Kensen, Koike, Hironobu, Nunoshige, Jun, Takata, Tsuyoshi, Kondo, Junko N., Hara, Michikazu, Domen, Kazunari
Format: Article
Language:English
Subjects:
Additives
Catalytic
Cermet
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Summary: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.
ISSN:0884-2914
2044-5326
DOI:10.1557/JMR.2004.0269