In:
Journal of Materials Research, Springer Science and Business Media LLC, Vol. 19, No. 7 ( 2004-07), p. 2100-2108
Kurzfassung:
Powders of TiO 2 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 + , Ca 2+ , Sr 2+ , Ba 2+ , Nb 5+ , Fe 3+ , Zn 2+ , and Al 3+ ), the photocatalyst prepared with Sr 2+ 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 TiO 2 lattice.
Materialart:
Online-Ressource
ISSN:
0884-2914
,
2044-5326
DOI:
10.1557/JMR.2004.0269
Sprache:
Englisch
Verlag:
Springer Science and Business Media LLC
Publikationsdatum:
2004
ZDB Id:
54876-5
ZDB Id:
2015297-8
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