Study on controlled hydrolysis of titanium isopropoxide by small angle X-ray scattering

DU Qianqian; GU Jinghua; MO Guang; WEI Yanru; YIN Wenjie; LI Jia

doi:10.11949/j.issn.0438-1157.20170263

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Study on controlled hydrolysis of titanium isopropoxide by small angle X-ray scattering

更新时间：2025-12-10

- Study on controlled hydrolysis of titanium isopropoxide by small angle X-ray scattering
- CIESC Journal Issue 9, Pages: 3607-3615(2017)
- 作者机构：
  
  1. 北京航空航天大学材料科学与工程学院,北京,100191
  2. 中国科学院高能物理研究所,北京,100039
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20170263
  CLC： 648.1
- Online First：05 September 2017，
  
  Published：05 September 2017
- 稿件说明：
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DU Qianqian, GU Jinghua, MO Guang, et al. Study on controlled hydrolysis of titanium isopropoxide by small angle X-ray scattering[J]. CIESC Journal, 2017, (9): 3607-3615.
DOI：

DU Qianqian, GU Jinghua, MO Guang, et al. Study on controlled hydrolysis of titanium isopropoxide by small angle X-ray scattering[J]. CIESC Journal, 2017, (9): 3607-3615. DOI： 10.11949/j.issn.0438-1157.20170263.

摘要

由金属醇盐水解制备溶胶的方法已广泛应用于溶胶-凝胶法制备纳米孔无机膜，但对金属醇盐水解机理的认识十分有限。通过控制异丙醇钛[Ti（i-OC3H7）4]在异丙醇（i-C3H7OH）中水解制备TiO2溶胶，利用小角X射线散射（SAXS）方法研究了由不同H2O/Ti（i-OC3H7）4的反应混合物[Ti（i-OC3H7）4：H2O：i-C3H7OH=1：m：30（摩尔比）]形成TiO2溶胶的过程，探讨了控制Ti（i-OC3H7）4水解的过程中胶粒形成与长大的规律。研究结果表明，所合成的TiO2溶胶的胶粒粒径小于10 nm，胶粒的形成和长大与H2O/Ti（i-OC3H7）4摩尔比密切相关。H2O/Ti（i-OC3H7）4（摩尔比） ≥ 2.0时，随着H2O/Ti（i-OC3H7）4增加，溶胶的稳定性下降。

Abstract

Metal oxide sols can be prepared from metal alkoxides by hydrolyzation

which has been widely used in synthesis of nano-porous ceramic membranes by sol-gel method. However

the knowledge on hydrolysis mechanism of metal alkoxides is very limited. In this paper

TiO2 sols were prepared by controlled hydrolyzation of titanium isopropoxide[Ti(i-OC3H7)4] in isopropanol (i-C3H7OH). The formation of TiO2 sols from the initial reactant mixtures with different molar ratios of H2O/Ti(i-OC3H7)4[Ti(i-OC3H7)4:H2O:i-C3H7OH=1:m:30] was charterized by small angle X-ray scattering (SAXS). The mechanism of formation and growth of colloidal particles is discussed. TiO2 sol with a particle size less than 10 nm can be obtained. The formation and growth of colloidal particles are remarkably influenced by the molar ratio of H2O/Ti(i-OC3H7)4. When the molar ratio of H2O/Ti(i-OC3H7)4 ≥ 2.0

the stability of TiO2 sol decreases with the molar ratio of H2O/Ti(i-OC3H7)4 increasing.

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