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

I. Oja Açik, J. Madarász, M. Krunks, K. Tõnsuaadu, D. Janke, G. Pokol, L. Niinistö

Research output: Contribution to journalArticle

17 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)557-563
Number of pages7
JournalJournal of Thermal Analysis and Calorimetry
Volume88
Issue number2
DOIs
Publication statusPublished - May 1 2007

Keywords

  • EGA-FTIR
  • EGA-MS
  • Simultaneous TG/DTA
  • Sol-gel
  • Titania
  • Titania-xerogels

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry

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