Titanium(IV) acetylacetonate xerogels for processing titania films

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• 作者：Ilona Oja Acik ; J. Madar¨¢sz ; M. Krunks ; K. T?nsuaadu ; G. Pokol and L. Niinist?
• 关键词：EGA by FTIR and MS ; sol ; gel titania processing ; Ti(IV) ; acac xerogel
• 刊名：Journal of Thermal Analysis and Calorimetry
• 出版年：2009
• 出版时间：July, 2009
• 年：2009
• 卷：97
• 期：1
• 页码：39-45
• 全文大小：408.8 KB

文摘

Thermal decomposition of dried crystalline powder obtained from titanium(IV) bis(acetylacetonate) diisopropoxide (75 % solution in 2-propanol) (1) was monitored by simultaneous TG/DTA, EGA-FTIR and EGA-MS measurements and the results were compared with those of amorphous powder obtained by gelling of acetylacetonate-modified titanium(IV) tetra-isopropoxide at molar ratio of 1:2 in boiling 2-methoxyethanol (2). Thermal degradation of 1 in the temperature range of 25–700¡ãC consists of 5 steps with a total mass loss of 62.5 % . EGA by FTIR and MS revealed the release of H₂O below 120¡ãC; followed by an intensive evolution of acetylacetone around 245¡ãC. The release of acetone and acetic acid occurs up to 270¡ãC and that of CO and CO₂ up to 530¡ãC.