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

Preparation method of nano titanium dioxide compound

A technology of nano-titanium dioxide and titanium dioxide, applied in the direction of titanium oxide/hydroxide, titanium dioxide, chemical instruments and methods, etc., can solve the problems of small specific surface area, easy to fall off, high band gap, etc., and achieve high photocatalytic activity, firm combination, strong The effect of photocatalytic activity

Inactive Publication Date: 2012-11-21
INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
View PDF5 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Titanium dioxide has a high energy band gap and only responds to ultraviolet light below 387nm, which limits the practical application of titanium dioxide in the field of photocatalysis.
There are many ways to synthesize titanium dioxide. Chemical vapor deposition can prepare powder and film. Degussa p 25 uses chemical vapor phase nanoscale titanium dioxide powder. The activity of titanium dioxide prepared by this method is better, but the production equipment is expensive.
The powder sintering process is simple, but the prepared titanium dioxide film is unevenly distributed on the surface of the carrier, the specific surface area is small, and it is easy to fall off

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

[0022] Prepare the sol in steps a, b, and c according to the ratio of 10mL butyl titanate, 46mL absolute ethanol, 1mL, and 1mL water, and then immerse the clean glass piece in the sol for 1min, and then immerse it at a speed of 1.5mm / s. Lift it up vertically at a constant speed, put it into a muffle furnace at room temperature after natural drying, and heat it up to 500°C for 1 hour in an air atmosphere to prepare a single-layer nano-titanium dioxide film on a glass sheet.

[0023] The single-layer nano-titanium dioxide film is uniform and smooth, the root mean square surface roughness is about 0.3nm, the film is full of color, firmly combined with the carrier, the thickness is about 67nm, and the grain size is about 8nm.

Embodiment 2

[0025] The sol in steps a, b, and c was prepared according to the ratio of 10mL butyl titanate, 46mL absolute ethanol, 1mL, and 1mL water, and the sol was naturally evaporated into a gel according to step g, and then dried with an infrared lamp at low temperature. Grind it into powder, and then bake it in a muffle furnace at 500°C for 2 hours to obtain nano-titanium dioxide powder.

[0026] The nano-titanium dioxide powder has good dispersibility, and the grain size is about 11nm.

Embodiment 3

[0028] The sols in steps a, b, and c were prepared according to the ratio of 10mL butyl titanate, 46mL absolute ethanol, 1mL, and 1mL water, then put the titanium dioxide sol into the spray gun, and spray it on the foamed copper in the form of mist. Dry naturally after applying a layer of film. After natural drying, put it into a muffle furnace at 400°C and bake for 1 hour, that is, a single-layer nano-titanium dioxide film is prepared on the copper foam.

[0029] The nano-titanium dioxide thin film is firmly combined with the carrier, the thickness is about 60nm, and the grain size is about 8nm.

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

PropertyMeasurementUnit
surface roughnessaaaaaaaaaa
thicknessaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of a nano titanium dioxide compound. The method comprises the steps of adding butyl titanate dropwise into an alcohol dispersing agent under the condition of vigorous stirring to obtain a light yellow transparent solution A; mixing an acid inhibitor, water and the alcohol dispersing agent to obtain a solution B; then dropping B into A under the condition of vigorous stirring to obtain titanium dioxide sol; loading the titanium dioxide sol on a carrier by a spray coating method or a dip-coating method and performing natural drying; and placing a dried film into a muffle furnace at the temperature in a range between 250 DEG C and 650 DEG C and performing calcinations for 0.5-3h under the condition of air atmosphere to obtain a nano titanium dioxide film. According to the method, the prepared titanium dioxide material has a small grain size, a large specific surface area and high catalytic oxidation activity, and also can be used as a catalytic material or a sterilization material, and the nano titanium dioxide film also has a self-cleaning function.

Description

technical field [0001] The invention belongs to the technical field of chemical material preparation, and in particular relates to a preparation method of nano titanium dioxide compound. Background technique [0002] Titanium dioxide has a high energy band gap and only responds to ultraviolet light below 387nm, which limits the practical application of titanium dioxide in the field of photocatalysis. At the same time, it is difficult to separate and recover powder catalysts after the reaction, it is not easy to reuse, and it is easy to cause secondary pollution and other problems. This has higher requirements for the modification and curing of titanium dioxide photocatalysts. [0003] Preparation conditions have a great influence on the photocatalytic activity and microstructure of titanium dioxide. Optimizing the best preparation conditions and film loading method is an important link to obtain highly active titanium dioxide powder and film. There are many ways to synthesi...

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 Applications(China)
IPC IPC(8): C01G23/053B82Y30/00B01J21/06
Inventor 刘秀华王和义孟丹邓义
Owner INST OF NUCLEAR PHYSICS & CHEM CHINA ACADEMY OF
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