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Hydrothermal synthesis of well-dispersed TiO2 nano-crystals

Published online by Cambridge University Press:  31 January 2011

Juan Yang ,
Sen Mei  and
José M.F. Ferreira
Juan Yang
Affiliation:
Department of Ceramic and Glass Engineering, CICECO, University of Aveiro, 3810–193, Aveiro, Portugal
Sen Mei
Affiliation:
Department of Ceramic and Glass Engineering, CICECO, University of Aveiro, 3810–193, Aveiro, Portugal
José M.F. Ferreira
Affiliation:
Department of Ceramic and Glass Engineering, CICECO, University of Aveiro, 3810–193, Aveiro, Portugal
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Abstract

Well-dispersed anatase and rutile nano-particles were prepared via hydrothermal treatment of tetrabutylammonium hydroxide-peptized and HNO3-peptized sols at 240 °C. A broad particle size distribution of anatase crystals was observed in the nonpeptized TiO2 species hydrothermally treated at 240 °C. X-ray diffraction and transmission electron microscopy, as well as zeta potential measurement, were used to characterize the particles. The formation of the well-dispersed anatase and rutile particles from the peptized samples could be attributed to (i) homogeneous distribution of the component in the peptized sols, and (ii) the high long-range electrostatic forces between particles in the presence of both peptizers, which were not present in the nonpeptized samples. This work provided a new way to prepare nano-crystals of titania.

Type
Rapid Communications
Information
Journal of Materials Research , Volume 17 , Issue 9 , September 2002 , pp. 2197 - 2200
Copyright
Copyright © Materials Research Society 2002

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References

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