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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/12112

Title: Thermal decomposition and spectroscopic investigation of a new aqueous glycolato(-peroxo) Ti(IV) solution-gel precursor
Authors: DE DOBBELAERE, Christopher
MULLENS, Jules
HARDY, An
VAN BAEL, Marlies
Issue Date: 2011
Publisher: ELSEVIER SCIENCE BV
Citation: THERMOCHIMICA ACTA, 520(1-2). p. 121-133
Abstract: A new aqueous solution-gel precursor based on water soluble glycolato(-peroxo)-Ti(IV) complexes is developed for the preparation of TiO(2) films. With regard to the decomposition of complexes towards oxide formation, it is important to gain insight in the chemical transformations inside the precursor during thermal treatment. Therefore, the thermo-oxidative decomposition pathway of a gel obtained by slow evaporation of the precursor solution is described based on hyphenated thermogravimetric analysis with Fourier transform infrared spectroscopy (TGA-FTIR) and mass spectrometry (TGA-MS). Pure glycolic acid is used as a reference system for this study. By varying the molar glycolic acid to Ti(IV) ratio, the thermal decomposition of the gel can be drastically shortened and the profile's course changed. Gel structure and chemical changes in the gel upon heating are also studied by means of off-line FTIR. A unidentate coordination of the titanium(IV) ion by the carboxylate group of the glycolato ligands and the involvement of the hydroxyl group is confirmed. Phase formation at certain points in the thermal decomposition is studied by X-ray diffraction and Raman spectroscopy. Finally, it is proven that the new precursor is a valuable candidate for the deposition of low carbon containing solution-gel films which can ultimately be converted into smooth and uniform TiO(2) films. (C) 2011 Elsevier B.V. All rights reserved.
Notes: [De Dobbelaere, C; Mullens, J; Hardy, A; Van Bael, MK] Hasselt Univ, Inst Mat Res Inorgan & Phys Chem, B-3590 Diepenbeek, Belgium [Hardy, A; Van Bael, MK] IMEC Vzw, Div IMOMEC, B-3590 Diepenbeek, Belgium
URI: http://hdl.handle.net/1942/12112
DOI: 10.1016/j.tca.2011.03.028
ISI #: 000292589500017
ISSN: 0040-6031
Category: A1
Type: Journal Contribution
Validation: ecoom, 2012
Appears in Collections: Research publications

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