Effects of Nb doping on the TiO2 anatase-to-rutile phase transition

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We study the influence of Nb doping on the TiO₂ anatase-to-rutile phase transition, using combined transmission electron microscopy, Raman spectroscopy, x-ray diffraction and selected area electron diffraction analysis. This approach enabled anatase-to-rutile phase transition hindering to be clearly observed for low Nb-doped TiO₂ samples. Moreover, there was clear grain growth inhibition in the samples containing Nb. The use of high resolution transmission electron microscopy with our samples provides an innovative perspective compared with previous research on this issue. Our analysis shows that niobium is segregated from the anatase structure before and during the phase transformation, leading to the formation of NbO nanoclusters on the surface of the TiO₂ rutile nanoparticles. © 2002 American Institute of Physics.

Published in:
Journal of Applied Physics (Volume:92 , Issue: 2 )

Date of Publication: Jul 2002

Page(s):: 853 - 861
ISSN :: 0021-8979
Digital Object Identifier :: 10.1063/1.1487915
Product Type:: Journals & Magazines

Date of Current Version :: 18 June 2009
Issue Date :: Jul 2002

Author(s)

Arbiol, J.
Department of Electronics, EME Electronic Materials and Engineering, University of Barcelona, Martı´ i Franquès 1, 08028 Barcelona, Spain
Cerda, J. ; Dezanneau, G. ; Cirera, A. ; Peiro, F. ; Cornet, A. ; Morante, J.R.