Single and mixed phase TiO2 powders prepared by excess hydrolysis of titanium alkoxide

Download files
Access & Terms of Use
open access
Abstract
To investigate the excess hydrolysis of titanium alkoxides, TiO2 powders were fabricated from titanium tetraisopropoxide using 6 : 1 and 100 : 1 H2O/Ti (r) ratios. The powders were dried and fired at a range of temperatures ((800uC). Hydroxylation and organic content in powders were characterised using attenuated total reflectance Fourier transform infrared spectroscopy (FTIR), laser Raman microspectroscopy and elemental microanalysis; surface area and pore size distribution were evaluated using N2 gas adsorption; phase composition was analysed using Xray diffraction (XRD) and laser Raman microspectroscopy; and crystallite size was evaluated by XRD, TEM and SEM. Results showed near complete hydrolysis in a predominantly aqueous medium (r5100), resulting in precipitated crystalline powders exhibiting brookite and anatase, which begin to transform to rutile below 500uC. The powders precipitated in a predominantly organic medium (r56) underwent partial hydrolysis, were highly porous and exhibited an amorphous structure, with the crystallisation of anatase occurring at y300uC and the transformation to rutile beginning at 500–600uC.
Persistent link to this record
DOI
Additional Link
Author(s)
Hanaor, Dorian
Karatchevtseva, Inna
Chironi, Ilkay
Triani, Gerry
Sorrell, Charles
Supervisor(s)
Creator(s)
Editor(s)
Translator(s)
Curator(s)
Designer(s)
Arranger(s)
Composer(s)
Recordist(s)
Conference Proceedings Editor(s)
Other Contributor(s)
Corporate/Industry Contributor(s)
Publication Year
2012
Resource Type
Journal Article
Degree Type
UNSW Faculty
Files
download Post peer review version.pdf 2.17 MB Adobe Portable Document Format
Related dataset(s)