Investigation of IrO2/SnO2 thin film evolution by thermoanalytical and spectroscopic methods
Horvath, Erzsebet , Kristof, Janos , Frost, Ray L., Heider, N. , & Vagvolgyi, V. (2004) Investigation of IrO2/SnO2 thin film evolution by thermoanalytical and spectroscopic methods. Journal of Thermal Analysis and Calorimetry, 78(2), pp. 687-695.
The formation mechanism of thermally prepared IrO2/SnO2 thin films has been investigated under in situ conditions by thermogravimetry combined with mass spectrometry (TG-MS) and infrared emission spectroscopy (IRES). Mixtures of varying composition of the precursor salts (SnCl2·2H2O dissolved in ethanol and IrCl3·3H2O dissolved in isopropanol) were prepared onto titanium metal supports. Then the solvent was evaporated and the gel-like films were heated in an atmosphere containing 20% O2 and 80% Ar to 600°C. The thermogravimetric curves showed that the evolution of the oxide phases take place in several decomposition stages and the final mixed oxide film is formed between 490 and 550°C, depending on the noble metal content. Mass spectrometric ion intensity curves revealed that below 200°C crystallization water, residual solvent, and hydrogen-chloride (formed as a result of an intramolecular hydrolysis) are liberated. The decomposition of surface species (surface carbonates, carbonyls and carboxylates) formed via the interaction of the residual solvent with the precursor salts takes place up to 450°C as evidenced by emission Fourier transform infrared spectrometry.
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|Item Type:||Journal Article|
|Subjects:||Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600)|
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Science and Technology|
|Copyright Owner:||Copyright 2004 Akademiai Kiado Rt. (Springer)|
|Deposited On:||17 Jun 2009 23:08|
|Last Modified:||29 Feb 2012 23:08|
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