Chelation and solvent effect on the preparation of titania colloids
Journal
Materials Chemistry and Physics
Journal Volume
101
Journal Issue
1
Pages
12-19
Date Issued
2007
Author(s)
Abstract
Different particle size and stability of TiO2 colloids, using acetylacetone modified titanium isopropoxide as precursor, have been synthesized under various polarity organic solvent. In this study, the chelating bond between titanium isopropoxide and acetylacetone was examined by FTIR. The crystalline structure of TiO2 colloid prepared by using acetylacetone modified or un-modified titanium isopropoxide as precursor were determined by X-ray diffraction, before or after sintering process. The TiO2 colloidal size and aggregation phenomenon were obtained from light scattering and photographs of SEM and TEM. From the observation of experiments, stable TiO2 colloid could not be obtained if the hydrolysis/condensation reaction rate of titanium precursor was not inhibited by acetylacetone. The solvent effect on the colloidal particle size and stability were explained by Hansen solubility parameters. In this study, the Hansen solubility parameters of acetylacetone modified TiO2 were estimated, which would be useful information in the preparation of stable TiO2 colloid. © 2006 Elsevier B.V. All rights reserved.
SDGs
Publisher
Elsevier B.V.
Type
journal article