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Issue 2, 2001
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Preparation of titania mesoporous materialsusing a surfactant-mediated sol–gel method

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Abstract

Small titania particles were generated within the template of a non-ionic surfactant (TX-100) reverse micelle assembly by the sol–gel method from titanium(IV) isopropoxide. Cyclohexane was used as the reaction solvent to form a reverse micelle system with a low water to surfactant ratio. Gelling, i.e., hydrolysis and polycondensation, were observed by means of viscosity measurements. The transparent raw gels obtained were dried under vacuum at 372 K. The dry gels were then either thermally decomposed directly to TiO2 or the organic content (surfactant) was substantially reduced first by supercritical fluid extraction with CO2 and then thermally treated. Special attention was paid to the effect of temperature on the extent of crystallisation of individual crystallographic phases of TiO2. Gels, partly decomposed gels and gels after the supercritical fluid extraction were investigated by XRD, XPS, IR, TPR, thermogravimetry, mass spectrometry, elemental analysis, UV–vis, SEM and extensive gas adsorption measurements. Their properties were related to the structure and other features of the final nanosized TiO2 particles. The anatase form of TiO2 with a very high specific surface area and well-developed mesoporous and microporous structure was prepared.

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Publication details

The article was received on 14 Jun 2000, accepted on 13 Sep 2000 and first published on 05 Jan 2001


Article type: Paper
DOI: 10.1039/B004760K
Citation: J. Mater. Chem., 2001,11, 644-651
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    Preparation of titania mesoporous materials using a surfactant-mediated sol–gel method

    P. Kluson, P. Kacer, T. Cajthaml and M. Kalaji, J. Mater. Chem., 2001, 11, 644
    DOI: 10.1039/B004760K

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