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http://hdl.handle.net/1942/4109
Title: | An aqueous solution-gel citratoperoxo-Ti(IV) precursor: synthesis, gelation, thermo-oxidative decomposition and oxide crystallization | Authors: | HARDY, An D'HAEN, Jan VAN BAEL, Marlies MULLENS, Jules |
Issue Date: | 2007 | Publisher: | SPRINGER | Source: | JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY, 44(1). p. 65-74 | Abstract: | A watersoluble citratoperoxo-Ti(IV) complex was synthesized and the chemical reactions that occur during the different synthesis steps were studied. A crystalline complex could be obtained by slow evaporation of highly concentrated precursor solutions, while fast evaporation led to the preparation of a homogeneous, amorphous glassy solid, the gel. The chemical structure of the crystallized complex ion and of the gel were shown to be related, but differed due to the presence of a crosslinked ammonium citrate network in the gel, which prevents crystallization. The thermo-oxidative decomposition pathway of the crystalline complex and the gel to the metal oxide is described based on in-situ thermal analysis techniques combined with Fourier transform infrared and mass spectrometry, diffuse reflection infrared by Fourier transform as well as high-temperature X-ray diffraction. The study offers a fundamental understanding of the behavior of the aqueous solution gel Ti(IV) precursor which is applicable in the preparation of all kinds of multimetal oxide systems containing Ti(IV) ions. | Notes: | Hasselt Univ, Inst Mat Res, Lab Inorgan & Phys Chem, Diepenbeek, Belgium. XIOS Hogesch, Dept IWT, Diepenbeek, Belgium. IMEC, Div IMOMEC, Diepenbeek, Belgium.VAN BAEL, MK, Hasselt Univ, Inst Mat Res, Lab Inorgan & Phys Chem, Diepenbeek, Belgium.marlies.vanbael@uhasselt.be | Keywords: | aqueous solution-gel route; precursor; citratoperoxo-Ti(IV) complex; TGA-EGA; HT-DRIFT; HT-XRD | Document URI: | http://hdl.handle.net/1942/4109 | ISSN: | 0928-0707 | e-ISSN: | 1573-4846 | DOI: | 10.1007/s10971-007-1601-3 | ISI #: | 000249561300010 | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2008 |
Appears in Collections: | Research publications |
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