Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing high- stable neutral mixed crystal nanometer TiO2 hydrosol

A water sol, high stability technology, applied in the direction of chemical instruments and methods, titanium oxide/hydroxide, physical/chemical process catalysts, etc., can solve the problem that organic matter cannot be degraded by photocatalysis, and achieve stable TiO2 sol, good transparency , Easy to spray effect

Active Publication Date: 2010-09-22
SHANGHAI UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Japanese patent JP2005-169160 discloses a method of using titanium tetrachloride as a precursor to prepare SiO 2 Coated neutral nano-TiO 2 The method of sol, but the sol has the function of shielding ultraviolet rays and cannot be used in the field of photocatalytic degradation of organic matter

Method used

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
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The preparation process and steps in this embodiment are as follows:

[0025] TiO in this embodiment 2 The composition and weight percentage of the hydrosol are controlled as follows: TiO 2 4%, SiO 2 2.5%, metal salt SnCl 4 0.5%, deionized water 93%.

[0026] Take titanium tetrachloride as raw material, dissolve it in water to form a solution. Add sodium hydroxide solution into the titanium tetrachloride solution under stirring, and adjust the pH value of the solution to neutral; after the reaction is completed, filter, and wash the precipitate obtained in the reaction with deionized water until the conductivity of the filtrate is The rate is less than 100μS / cm. Then add acid to degel, add nitric acid solution, add nitric acid according to the molar ratio of titanium tetrachloride and nitric acid 1.4:1, and degel at 95° C. for 40 minutes. Then add a certain amount of SiO 2 Sol and Metal Salt SnCl 4 , let it continue to react for 2 hours; then add lye to adjust ...

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

PUM

No PUM Login to View More

Abstract

The invention relates to a method for preparing a neutral mixed crystal nano TiO2 hydrosol with high stability, belonging to the photocatalytic active nano titanium dioxide material preparation process technical field. The method comprises the main steps that: 1. a titanium compound is hydrolyzed by aqueous slkali and deposited, filtered and washed; 2. products obtained are added in an acid solution and peptized at the temperature of between 60 and 100 DEG C, and added with a certain amount of SiO2 sols used as a stabilizer and metal salt used as a doping agent to be continuously reacted for a period of time; 3. the mixture is added with alkaline liquor for adjusting the pH value to between 7 and 8; 4. the mixture is filtered and washed, and filter cakes are dissolved in a certain amount of water and redispersed, and finally the neutral mixed crystal nano TiO2 sol with high stability is obtained. The TiO2 compound hydrosol prepared by the invention is neutral and has good transparencyand stability, and the crystal form ratio of anatase and rutile is controllable, and the spectral response range is wide; the TiO2 hydrosol prepared by the invention is convenient in coating operation; moreover, the hydrosol can utilize the solar energy to complete sewage disposal, air purification, antibiotic treatment and glass film coating treatment, etc.

Description

Technical field: [0001] The invention relates to a highly stable neutral mixed crystal nano TiO 2 The invention discloses a preparation method of water sol, which belongs to the technical field of photocatalytic active nano titanium dioxide material preparation technology. Background technique: [0002] Nano-titanium dioxide has excellent photocatalytic activity and can effectively mineralize organic pollutants into CO 2 、H 2 O and inorganic acids have the advantages of corrosion resistance, stable properties, and non-toxicity. [0003] Nano-TiO 2 Sol is a highly dispersed, crystallized hydrocolloid, which is different from titanium dioxide powder suspension dispersed by dispersant. The sol can be directly synthesized from the titanium source without being prepared into powder, and the crystallized sol can avoid the problem of agglomeration during the calcination process, so the product has good dispersion, good stability, and convenient modification. Secondly, the sol ...

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

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06C01G23/053
Inventor 施利毅袁帅张美红方建慧赵尹
Owner SHANGHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com