From TiCl3 to TiO2 nanoparticles (anatase, brookite and rutile):: Thermohydrolysis and oxidation in aqueous medium

被引：104

作者：

Cassaignon, Sophie ^{[1
]}

Koelsch, Magali ^{[1
]}

Jolivet, Jean-Pierre ^{[1
]}

机构：

[1] Univ Paris 06, CNRS, UMR 7574, F-75005 Paris, France

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2007年 / 68卷 / 5-6期

关键词：

nanostructures; oxides; chemical synthesis; crystal growth; sol-gel growth;

D O I：

10.1016/j.jpcs.2007.02.020

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Titania nanoparticles were synthesized by hydrolysis and oxidation of titanium trichloride (TiCl3) in aqueous medium. The TiO2 synthesis via the hydrolysis of Ti(III) proceeds in two steps: a condensation step and an oxidation step, which can be separated or simultaneous and they could take place in both orders. The importance of the medium acidity (0.5 < pH < 6.5) at 60 degrees C on the precipitation was underlined in this study. According to the pH, brookite (diamond-shape platelets) or rutile (rods) were obtained under particularly soft conditions, as well in acidity as in temperature whereas these particles are classically obtained under drastic conditions. Moreover, the control of the TiCl3 hydrolysis allowed the synthesis of non-usual morphologies of TiO2 nanoparticles, especially rods of anatase, small square platelets (3 nm) of rutile, (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：695 / 700

页数：6

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