Ultrasonic and chemical method for preparing nano crystals of titanium dioxide

A technology of titanium dioxide and ultrasonic chemistry, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of complex process, high requirements, and high product cost, and achieve simple process, narrow particle size distribution range, and small product particle size Effect

Inactive Publication Date: 2005-06-15
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method requires high technology and equipment materials, large investment, complicated process and high product cost.

Method used

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  • Ultrasonic and chemical method for preparing nano crystals of titanium dioxide
  • Ultrasonic and chemical method for preparing nano crystals of titanium dioxide
  • Ultrasonic and chemical method for preparing nano crystals of titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Take 5ml tetrabutyl titanate and add it dropwise to the mixture of 40ml deionized water and 10ml absolute ethanol, then immerse the titanium alloy probe of the ultrasonic generator in it for ultrasonic treatment, the ultrasonic frequency is 24KHz, and the intensity is 100W / cm 2 , control the temperature of the reaction solution at 90°C, and the reaction time is 2h, then add 0.1g of polyethylene glycol (PEG) dispersant, stir with magnetic force for 1h, then centrifuge, and the obtained precipitates are washed twice with deionized water and absolute ethanol Once, and finally vacuum dry. The obtained product is short columnar, with a size of 5 / 9nm (W / L), narrow particle size distribution range, good monodispersity, and anatase crystal form.

Embodiment 2

[0039] In an ice-water bath, add 3ml of TiCl 4 Drop into 50ml of deionized water, and then immerse the titanium alloy probe of the ultrasonic generator in it for ultrasonic treatment, the ultrasonic frequency is 100KHz, and the intensity is 50W / cm 2 , control the temperature of the reaction solution at 60°C, and the reaction time is 3h, then add 0.1g of polyvinyl alcohol dispersant, stir it magnetically for 1h, then centrifuge, and the obtained precipitates are washed twice with deionized water, once with absolute ethanol, and finally vacuum dry. The obtained product is long columnar, the size is 3 / 12nm (W / L), and the crystal form is rutile.

Embodiment 3

[0041] Dissolve 5.0g of titanium sulfate in 50ml of deionized water, and then immerse the titanium alloy probe of the ultrasonic generator in it for ultrasonic treatment. The ultrasonic frequency is 380KHz and the intensity is 25W / cm 2 , control the reaction temperature at 50°C, and the reaction time is 4h, then add a mixed dispersant of 0.1g polyethylene glycol (PEG) and 0.1g triethanolamine, after magnetic stirring for 1h, centrifuge, and the obtained precipitates are washed with deionized water for two times, washed once with absolute ethanol, and finally vacuum-dried, the obtained product is spherical, the size is 14nm, the particle size distribution range is narrow, and the crystal form is anatase.

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Abstract

The invention belongs to a preparation method of titanium dioxide nanocrystals, in particular to a sonochemical preparation method of titanium dioxide nanocrystals. The preparation method disclosed in the present invention uses tetravalent titanium solution as raw material, the temperature of the reaction solution is 50-95°C, ultrasonic treatment is performed for 2-4 hours under normal pressure, then a dispersant is added, stirred and dispersed, and the obtained product is centrifuged. , washed, and vacuum-dried to obtain titanium dioxide nanocrystals with a specific crystal structure. The titanium dioxide nanocrystal produced by the method of the invention has the advantages of simple process, small product particle size and narrow particle size distribution range.

Description

[0001] (1) The technical fields mentioned [0002] The invention belongs to a preparation method of titanium dioxide nanocrystals, in particular to a sonochemical preparation method of titanium dioxide nanocrystals. (2) Background technology [0003] Due to their unique properties, such as small size effect, surface effect, quantum size effect, and macroscopic quantum tunneling effect, nanomaterials exhibit properties that conventional materials do not have in terms of magnetism, light, and electricity, and are widely used in various fields. Such as magnetic materials, biological and medical aspects, catalysis, ultra-particle sensors, optics, etc. Therefore, the research on the preparation and application of nanomaterials has become a worldwide research hotspot. [0004] Titanium dioxide is an important semiconductor material, which has a wide range of applications such as coatings, ceramics, cosmetics, food, photosensitive materials, and catalysts. Nano-titanium dioxide, wit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/047
Inventor 王西奎国伟林
Owner UNIV OF JINAN
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