Preparation of titania from tetrakis(diethylamino)titanium via hydrolysis

Yoshizumi Ishikawa, Hideyasu Honda, Yoshiyuki Sugahara

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    Abstract

    The conversion of tetrakis(diethylamino)titanium (Ti(NEt2)4) into titania via either a combination of hydrolysis (Ti(NEt2)4:THF:H2O = 1:10:x, x = 2, 4, 10) at ambient conditions and calcination (method A) or hydrolysis in a water-tetrahydrofuran (THF) mixture (Ti(NEt2)4:THF:H2O = 1:10:100) at reflux (method B) was investigated. Titanium tertiary butoxide (Ti(OtBu)4) was also used as a substitute for Ti(NEt2)4. The hydrolysis via method A resulted in the formation of amorphous solids containing organics. Thermal analyses showed that the hydrolysis products showed mass losses up to 500°C probably due to the presence of diethylamine (Et2NH) formed via the hydrolysis of Ti(NEt2)4 in the hydrolysis products, while a mass loss of the hydrolysis product from Ti(OtBu)4 was completed up to about 200°C. After calcination at ≥600°C, anatase or a mixture of anatase and rutile was obtained. The crystallization behavior of the hydrolysis products from Ti(NEt2)4 was different from that of the hydrolysis product from Ti(OtBu)4. The hydrolysis via method B gave only an amorphous material from Ti(NEt2)4, while a crystalline titania (anatase and brookite) formed from Ti(OtBu)4.

    Original languageEnglish
    Pages (from-to)365-369
    Number of pages5
    JournalJournal of Sol-Gel Science and Technology
    Volume19
    Issue number1-3
    DOIs
    Publication statusPublished - 2000 Dec

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    ASJC Scopus subject areas

    • Ceramics and Composites

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