Metal ion and N co-doped TiO2 as a visible-light photocatalyst
| Autor: | Junko N. Kondo, Kensen Okusako, Tsuyoshi Takata, Michikazu Hara, Hironobu Koike, Yoshiaki Sakatani, Kazunari Domen, Jun Nunoshige, Hiroyuki Ando |
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| Rok vydání: | 2004 |
| Předmět: |
Materials science
Mechanical Engineering Metal ions in aqueous solution Inorganic chemistry Doping Condensed Matter Physics law.invention Catalysis Ion Metal X-ray photoelectron spectroscopy Mechanics of Materials law visual_art Photocatalysis visual_art.visual_art_medium Physical chemistry General Materials Science Electron paramagnetic resonance |
| Zdroj: | Journal of Materials Research. 19:2100-2108 |
| ISSN: | 2044-5326 0884-2914 |
| DOI: | 10.1557/jmr.2004.0269 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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