Preparation of titania from tetrakis(diethylamino)titanium via hydrolysis

Yoshizumi Ishikawa, Hideyasu Honda, Yoshiyuki Sugahara

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    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

    Fingerprint

    Titanium
    hydrolysis
    Hydrolysis
    titanium
    preparation
    tetrahydrofuran
    anatase
    Titanium dioxide
    products
    Calcination
    roasting
    titanium dioxide
    organic solids
    amorphous materials
    Crystallization
    rutile
    substitutes
    crystallization
    Crystalline materials
    Water

    ASJC Scopus subject areas

    • Ceramics and Composites

    Cite this

    Preparation of titania from tetrakis(diethylamino)titanium via hydrolysis. / Ishikawa, Yoshizumi; Honda, Hideyasu; Sugahara, Yoshiyuki.

    In: Journal of Sol-Gel Science and Technology, Vol. 19, No. 1-3, 12.2000, p. 365-369.

    Research output: Contribution to journalArticle

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