Jump to main content
Jump to site search

Issue 34, 2005
Previous Article Next Article

A highly thermally stable anatase phase prepared by doping with zirconia and silica coupled to a mesoporous type synthesis technique

Author affiliations

Abstract

A zirconia and silica co-doped titania material was prepared from a sol–gel method which had been modified to include an organic templating agent. The product was only poorly mesoscopically ordered. However, the materials produced exhibited a very high temperature for the anatase to rutile phase transition (ART) such that even calcination at 1100 °C for extended periods did not completely remove the anatase phase. This was a much higher ART temperature than pure TiO2 and a similarly doped sample made in the absence of a templating agent. Data are compared to prepared mesoporous non-doped titanias. These exhibited low ART temperatures compared to non-mesoscopically prepared titania and the acceleration of the phase transformation can be explained in terms of strain induced by the mesoporous structure. For the highly stable doped anatase phase made using the template it was concluded that addition of the dopants stabilised the system to mass transport and reduced mesoporous related strain thereby retarding the phase transition. The ART was also retarded by the high surface area of the mesoscopically templated doped material.

Graphical abstract: A highly thermally stable anatase phase prepared by doping with zirconia and silica coupled to a mesoporous type synthesis technique

Back to tab navigation

Article information


Submitted
07 Mar 2005
Accepted
16 Jun 2005
First published
26 Jul 2005

J. Mater. Chem., 2005,15, 3494-3500
Article type
Paper

A highly thermally stable anatase phase prepared by doping with zirconia and silica coupled to a mesoporous type synthesis technique

D. J. Reidy, J. D. Holmes, C. Nagle and M. A. Morris, J. Mater. Chem., 2005, 15, 3494
DOI: 10.1039/B503395K

Search articles by author

Spotlight

Advertisements