EXAFS study of dopant segregation (Zn, Nb) in nanocrystalline anatase (TiO2)

Chadwick, Alan V., Knauth, P., Weibel, A., Mountjoy, Gavin, Bouchet, R. (2003) EXAFS study of dopant segregation (Zn, Nb) in nanocrystalline anatase (TiO2). Chemistry of Materials, 15 (26). pp. 4996-5002. ISSN 0897-4756. (doi:10.1021/cm034640n) (Access to this publication is currently restricted. You may be able to access a copy if URLs are provided) (KAR id:9379)

PDF Language: English Restricted to Repository staff only

Official URL: http://dx.doi.org/10.1021/cm034640n

Abstract

Segregation of an acceptor (Zn) and a donor dopant (Nb) in nanocrystalline anatase was studied by EXAFS spectroscopy. Different dopant concentrations between 0.1 and 1 at. % were investigated, and similar results were found for nanocrystalline powders and nanocrystalline ceramics made by hot-pressing the powders. Niobium did not segregate whatever the concentration, whereas zinc segregation was found above 0.1 at. %. These results can be interpreted based on defect thermodynamics, in the framework of a space charge segregation model.

Item Type:	Article
DOI/Identification number:	10.1021/cm034640n
Subjects:	Q Science
Institutional Unit:	Schools > School of Engineering, Mathematics and Physics > Physics and Astronomy
Former Institutional Unit:	Divisions > Division of Natural Sciences > Physics and Astronomy
Depositing User:	Alan Chadwick
Date Deposited:	15 Sep 2008 12:49 UTC
Last Modified:	20 May 2025 09:30 UTC
Resource URI:	https://kar.kent.ac.uk/id/eprint/9379 (The current URI for this page, for reference purposes)

University of Kent Author Information

Chadwick, Alan V..

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CReDIT Contributor Roles:

Mountjoy, Gavin.

Creator's ORCID:	https://orcid.org/0000-0002-6495-2006
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