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Journal of Sol-Gel Science and Technology

, Volume 19, Issue 1–3, pp 365–369 | Cite as

Preparation of Titania from Tetrakis(diethylamino)titanium via Hydrolysis

  • Yoshizumi Ishikawa
  • Hideyasu Honda
  • Yoshiyuki Sugahara
Article

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(O t Bu)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(O t Bu)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(O t Bu)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(O t Bu)4.

titania tetrakis(diethylamino)titanium new precursor hydrolysis 

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Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • Yoshizumi Ishikawa
    • 1
  • Hideyasu Honda
    • 2
  • Yoshiyuki Sugahara
    • 2
  1. 1.Department of Applied ChemistrySchool of Science and Engineering, Waseda UniversityTokyoJapan
  2. 2.Department of Applied ChemistrySchool of Science and Engineering, Waseda UniversityTokyoJapan

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