Issue 44, 2010
From the journal:

Journal of Materials Chemistry

Gas phase synthesis of titania with aerogel character and its application as a support in oxidation catalysis†

Stefan Dilger,a   Christian Hintze,a   Michael Krumm,a   Carlos Lizandara-Pueyo,a   Salem Deeb,b   Sebastian Procha  and  Sebastian Polarz*a  

* Corresponding authors

a University of Konstanz, Konstanz, Germany
E-mail: sebastian.polarz@uni-konstanz.de
Fax: +49 7531 884406
Tel: +49 7531 884415

b University of Bayreuth, Anorganische Chemie II, Bayreuth, Germany

Abstract

Titania materials with structures resembling aerogels are presented in the current contribution. In contrast to the classical routes the aerogel-like TiO2 materials discussed here are prepared exclusively by a high-temperature aerosol process. Thus, the titania particles forming the network are highly pure, highly crystalline and their surfaces are free of any additives. It is shown that the structure of the materials (particle-size, porosity, surface area, crystallinity, and phase composition) depends on a complex interplay of different parameters (temperature gradients, precursor concentration, residence time, etc.). However, the understanding of those correlations enables the preparation of tailor made titania materials with aerogel-like structure. The size of the primary, nanocrystalline particles can be varied systematically from 13 nm to 70 nm. The composition regarding the two different crystalline phases anatase and rutile can be adjusted as an independent parameter. Finally, the aerogel-like TiO2 materials were loaded with Au clusters and the activity in oxidation catalysis was investigated.

Graphical abstract: Gas phase synthesis of titania with aerogel character and its application as a support in oxidation catalysis

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Article information

DOI
https://doi.org/10.1039/C0JM00769B
Article type
Paper
Submitted
19 Mar 2010
Accepted
06 Sep 2010
First published
06 Oct 2010

J. Mater. Chem., 2010,20, 10032-10040

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Gas phase synthesis of titania with aerogel character and its application as a support in oxidation catalysis

S. Dilger, C. Hintze, M. Krumm, C. Lizandara-Pueyo, S. Deeb, S. Proch and S. Polarz, J. Mater. Chem., 2010, 20, 10032 DOI: 10.1039/C0JM00769B

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