Bastow, T.J. and Moodie, A.F. and Smith, M.E. and Whitfield, H.J. (1993) Characterization of titanta gels by O-17 nuclear-magnetic-resonance and electron-diffraction. Journal of Materials Chemistry, 3 (7). pp. 697-702. ISSN 0959-9428.
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The reaction of O-17-labelled water with titanium n-propoxide [Ti(OPrn)4] proceeds rapidly to produce OTi3 and OTi4 environments that can be clearly identified from O-17 magic-angle spinning NMR spectra. The gel structure is highly disordered but the quadrupolar interaction is shown to be small throughout (quadrupolar coupling constant, C(q) < 1.5 MHz). Organic fragments, which can be monitored by C-13 NMR, remain right up until crystallisation of anatase at 300-degrees-C.Crystallisation is confirmed by electron diffraction, and electron microscopy determines the crystallite size to be ca. 3 nm. O-17 NMR and electron diffraction are also used to follow the conversion of anatase to rutile.
|Subjects:||Q Science > QD Chemistry|
|Divisions:||Faculties > Science Technology and Medical Studies > School of Biosciences|
|Depositing User:||R.F. Xu|
|Date Deposited:||22 Oct 2009 19:22|
|Last Modified:||22 Oct 2009 19:22|
|Resource URI:||http://kar.kent.ac.uk/id/eprint/20790 (The current URI for this page, for reference purposes)|
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