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Issue 7, 1993
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Characterisation of titania gels by 17O nuclear magnetic resonance and electron diffraction

Abstract

The reaction of 17O-labelled water with titanium n-propoxide [Ti(OPrn)4] proceeds rapidly to produce OTi3 and OTi4 environments that can be clearly identified from 17O magic-angle spinning NMR spectra. The gel structure is highly disordered but the quadrupolar interaction is shown to be small throughout (quadrupolar coupling constant, Cq < 1.5 MHz). Organic fragments, which can be monitored by 13C NMR, remain right up until crystallisation of anatase at 300 °C. Crystallisation is confirmed by electron diffraction, and electron microscopy determines the crystallite size to be ca. 3 nm. 17O NMR and electron diffraction are also used to follow the conversion of anatase to rutile.

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Article type: Paper
DOI: 10.1039/JM9930300697
Citation: J. Mater. Chem., 1993,3, 697-702
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    Characterisation of titania gels by 17O nuclear magnetic resonance and electron diffraction

    T. J. Bastow, A. F. Moodie, M. E. Smith and H. J. Whitfield, J. Mater. Chem., 1993, 3, 697
    DOI: 10.1039/JM9930300697

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