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Preparation of nanocrystalline titania powder via aerosol pyrolysis of titanium tetrabutoxide

Published online by Cambridge University Press:  31 January 2011

P. P. Ahonen ,
E. I. Kauppinen ,
J. C. Joubert ,
J. L. Deschanvres  and
G. Van Tendeloo
P. P. Ahonen
Affiliation:
Aerosol Technology Group, VTT Chemical Technology, P.O. Box 1401, FIN-02044 VTT, Finland
E. I. Kauppinen
Affiliation:
Aerosol Technology Group, VTT Chemical Technology, P.O. Box 1401, FIN-02044 VTT, Finland
J. C. Joubert
Affiliation:
Laboratoire des Matériaux et du Génie Physique, ENSPG, Rue de la Houille-Blanche, Domaine Universitaire, BP 46, F-38402 Saint-Martin-D'Heres, France
J. L. Deschanvres
Affiliation:
Laboratoire des Matériaux et du Génie Physique, ENSPG, Rue de la Houille-Blanche, Domaine Universitaire, BP 46, F-38402 Saint-Martin-D'Heres, France
G. Van Tendeloo
Affiliation:
EMAT-University of Antwerpen, Groenenborgerlaan 171, B-2020 Antwerpen, Belgium
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Abstract

Nanocrystalline titanium dioxide was prepared via aerosol pyrolysis of titanium alkoxide precursor at 200–580 °C in air and in nitrogen atmospheres. Powders were characterized by x-ray diffraction, thermogravimetric analysis, Brunauer–Emmett–Teller analysis, scanning electron microscopy, transmission electron microscopy, energy dispersive spectroscopy, x-ray fluorescence, Raman and infrared spectroscopy, and Berner-type low-pressure impactor. The anatase phase transition was initiated at 500 °C in nitrogen and at 580 °C in air. Under other conditions amorphous powders were observed and transformed to nanocrystalline TiO2 via thermal postannealing. In air, smooth and spherical particles with 2–4-μm diameter were formed with an as-expected tendency to convert to rutile in the thermal postannealings. In nitrogen, a fraction of the titanium tetrabutoxide precursor evaporated and formed ultrafine particles via the gas-to-particle conversion. At 500 °C thermally stable anatase phase was formed in nitrogen. A specific surface area as high as 280 m2 g−1 was observed for an as-prepared powder.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 10 , October 1999 , pp. 3938 - 3948
Copyright
Copyright © Materials Research Society 1999

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