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Thermoanalytical studies of titanium(IV) acetylacetonate xerogels with emphasis on evolved gas analysis

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Abstract

Thermal decomposition of precursor xerogels for TiO2, obtained by gelling of acetylacetonate-modified titanium(IV) tetraisopropoxide (prepared at Ti-alkoxide:acetylacetone molar ratios of 1:1 (Ti-1) and 1:2 (Ti-2)) in boiling 2-methoxyethanol, was monitored by simultaneous TG/DTA/EGA-MS and EGA-FTIR measurements. Thermal degradation processes of Ti-1 and Ti-2 in the temperature range of 30–700°C consist of six mass loss steps, the total mass loss being 46.3% and 54.4%, respectively. EGA by FTIR and MS revealed release of H2O below 120°C; followed by evolution of acetone and acetic acid between approximately 100 and 320°C, and that of CO2 up to 560°C. Acetylacetone is evolved to a significant extent from sample Ti-2 at 120–200°C.

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Authors and Affiliations

  1. Faculty of Chemistry and Materials Technology, Tallinn University of Technology, Tallinn, Estonia, EE-19086, Ehitajate tee 5

    I. Oja Açik, M. Krunks & K. Tõnsuaadu

  2. Institute of General and Analytical Chemistry, Budapest University of Technology and Economics, Budapest, Hungary, HU–1521, Szt. Gellért tér 4

    J. Madarász, D. Janke & G. Pokol

  3. Laboratory of Inorganic and Analytical Chemistry, Helsinki University of Technology, Espoo, Finland, Fi/02015, P.O. Box 6100

    L. Niinistö

Authors
  1. I. Oja Açik
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  2. J. Madarász
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  3. M. Krunks
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  4. K. Tõnsuaadu
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  5. D. Janke
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  6. G. Pokol
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  7. L. Niinistö
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Correspondence to M. Krunks.

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Oja Açik, I., Madarász, J., Krunks, M. et al. Thermoanalytical studies of titanium(IV) acetylacetonate xerogels with emphasis on evolved gas analysis. J Therm Anal Calorim 88, 557–563 (2007). https://doi.org/10.1007/s10973-006-8064-6

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  • DOI: https://doi.org/10.1007/s10973-006-8064-6

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