An atomic-scale study of the role of titanium in TiO2:SiO2 sol-gel materials

Walters, J.K. and Rigden, J.S. and Dirken, P.J. and Smith, M.E. and Howells, W.S. and Newport, R.J. (1997) An atomic-scale study of the role of titanium in TiO2:SiO2 sol-gel materials. Chemical Physics Letters, 264 (5). pp. 539-544. ISSN 0009-2614. (Access to this publication is restricted)

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Abstract

Neutron diffraction data is used to reveal details of the effect of adding titania to a silica-based sol-gel, including a first direct observation of the Ti-O correlation, At low Ti contents the data are consistent with the 4-fold oxygen coordination derived from NMR. Even at these concentrations the silica network is shown to have been affected significantly, with bond-length distributions being narrowed, and with a high level of network-OH indicating a qualitative change in the mesoscopic structure associated with interfacial surfaces, Data on a phase separated sample supports the conclusion that the network-OH is associated with the phase separation process.

Item Type: Article
Subjects: Q Science
Divisions: Faculties > Science Technology and Medical Studies > School of Physical Sciences > Functional Materials Group
Depositing User: J.M. Smith
Date Deposited: 09 Apr 1914 20:04
Last Modified: 06 Sep 2011 01:55
Resource URI: http://kar.kent.ac.uk/id/eprint/16000 (The current URI for this page, for reference purposes)
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