Effect of hydrolysis conditions on thermal transformation of alkoxide-derived titanium dioxide

被引：10

作者：

Sasamoto, Tadashi ^{[1
]}

Enomoto, Sumie ^{[1
]}

Shimoda, Zenya ^{[1
]}

Saeki, Yuzo ^{[1
]}

机构：

[1] Kanagawa Inst of Technology, Atsugi, Japan

来源：

Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan | 1993年 / 101卷 / 1170期

关键词：

Adsorbents; -; Hydrolysis; Sol-gels;

D O I：

10.2109/jcersj.101.230

中图分类号：

学科分类号：

摘要：

The relationship between the hydrolysis conditions of titanium tetraisopropoxide (TTIP) and the thermal transformation of the hydrolysis products was investigated as a part of study on the properties of TiO2 formed by the hydrolysis of titanium alkoxide. The amorphous products formed under the HNO3 and HCl acidic conditions transformed to anatase at about 200°C. This temperature was about 100°C higher than that of the amorphous products formed with neutral water, and was not correlated with the H2O/TTIP molar ratio. On the other hand, the anatase-rutile transformation was significantly accelerated under the acidic condition. In particular, the single-phase rutile particles which were needle-shaped and about 0.1 μm in length were formed at room temperature when the concentrations of acids were more than 6 wt% for HNO3 and more than 4 wt% for HCl at the molar ratio of H2O/TTIP=20. In the case of the hydrolysis product formed under H2SO4 acidic condition, on the contrary, the temperatures of the amorphous-anatase and anatase-rutile transformations were higher than those of hydrolysis products with neutral water, and its values were 300 and 700°C, respectively.

引用

页码：230 / 232