Process and apparatus for preparing dispersed composite nanometer TiO2/SiO2 particle

A nano-composite, disperse phase technology, applied in the direction of titanium oxide/hydroxide, silicon dioxide, titanium dioxide, etc., to achieve the effect of easy industrial production, convenient operation and simple equipment structure
CN1810640AInactive Publication Date: 2006-08-02EAST CHINA UNIV OF SCI & TECH
0 Cites 20 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
EAST CHINA UNIV OF SCI & TECH
Publication Date
2006-08-02
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The present invention discloses the preparation process of dispersed composite nanometer TiO2 / SiO2 particle. The preparation process includes pre-mixing TiCl4, SiCl4, H2 and air in certain volume proportion, and hydrolysis reaction of the mixture in the central ring of burning reactor at 1200-2500 deg.c to produce dispersed composite nanometer TiO2 / SiO2 particle in the form between the nanometer spherical TiO2 particle and nanometer chain SiO2 particle and depending on the Ti / Si molar ratio. Inside the composite nanometer TiO2 / SiO2 particle, nanometer crystal TiO2 is dispersed in amorphous SiO2 base to form the dispersant structure. Inside the composite particle, there are Ti-O-Si bond and SiO2 to inhibit the growth TiO2 crystal grain and the conversion from anatase phase to rutile phase. Altering the Si content can controls the content of the anatase phase and the composite particle granularity.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The present invention relates to a kind of dispersed phase TiO 2 / SiO 2 Preparation method of nanocomposite particles. Background technique

[0002] Nano-TiO 2 Particles have high reactivity, good visible light permeability, and good photocatalytic activity, and are widely used as catalysts or catalyst supports for photocatalytic reactions; TiO 2 -SiO 2 Nanocomposite photocatalysts can not only improve TiO 2 Surface active sites, increase surface area, increase surface hydroxyl content, improve dispersion, SiO 2 The presence of TiO can also inhibit the 2 phase transformation and grain growth, enhancing its thermal stability. In order to meet the requirements of applications in different fields, people have developed nano-TiO 2 -SiO 2 A variety of preparation techniques for composite materials, such as sol-gel method (Sol-Gel), chemical phase deposition (CVD), gas phase combustion synthesis, etc. Compared with other nanomaterial synthesis meth...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More