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Micro-Raman Spectroscopic Characterization of Nanosized TiO2 Powders Prepared by Vapor Hydrolysis

Published online by Cambridge University Press:  31 January 2011

Yun-Hong Zhang ,
Chak K. Chan ,
John F. Porter  and
Wei Guo
Yun-Hong Zhang
Affiliation:
Department of Chemical Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
Chak K. Chan*
Affiliation:
Department of Chemical Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
John F. Porter
Affiliation:
Department of Chemical Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
Wei Guo
Affiliation:
Department of Chemical Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
*
b)Address correspondence to this author.
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Abstract

Micro-Raman analysis was used to study the structure of TiO2 powders produced at low (260 °C) and high (600–900 °C) temperatures by vapor hydrolysis of titanium tetraisopropoxide (TTIP). Spatial inhomogeneity was discovered after the amorphous TiO2 powders produced at low temperature were calcined at 700, 800, and 900 °C for 3 h. The TiO2 powders produced at high temperatures (from 600 to 900 °C) were found to be spatially homogeneous and predominately anatase in structure. Small amounts of rutile and brookite are found for powders produced at 700, 800, and 900 °C after calcination at 600 °C for 3 h. The rutile and brookite impurities are believed to be concentrated on the surface of anatase based on a comparison of results of Raman and x-ray diffraction studies.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 9 , September 1998 , pp. 2602 - 2609
Copyright
Copyright © Materials Research Society 1998

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