Preparation for nano-oxide powder

A nano-oxide and oxide technology, which is applied in the preparation of oxide/hydroxide, nanostructure manufacturing, titanium oxide/hydroxide, etc., can solve problems such as agglomeration, and achieve narrow distribution, regular morphology and simple device. Effect

Inactive Publication Date: 2008-10-08
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The method has the advantages of simple operation, high uniformity and purity of the prepared product, and the reaction rate is easy to control, but serious agglomeration occurs.

Method used

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  • Preparation for nano-oxide powder

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Example 1 Nano TiO 2 Powder preparation

[0018] 19.74g n-hexane, 21.20gTX-100, 13.40g n-hexanol, 1.77gH 2 O mixing, ultrasonic dispersion to prepare a transparent and uniform microemulsion system. Mix 13.16g of n-hexane, 0.98g of acetylacetone and 11.15g of tetrabutyl titanate, ultrasonically disperse them and add them into the microemulsion system while stirring rapidly. When the gel appears, continue to react for a period of time, then take it out and centrifuge it. Alternately washed with acetone and ethanol, dried and calcined at 500°C to obtain TiO 2 The particle size of the powder is 10-15nm.

Embodiment 2

[0019] Example 2 Nano-SiO 2 Powder preparation

[0020] 14.81g n-hexane, 15.90gTX-100, 10.05g n-hexanol, 3.10gH 2 O mixing, ultrasonic dispersion to prepare a transparent and uniform microemulsion system. Mix 13.16g of n-hexane, 1.72g of acetylacetone and 11.92g of ethyl orthosilicate, ultrasonically disperse and add to the microemulsion system while stirring rapidly, and continue stirring for a period of time after the addition. Move it into an autoclave at 120°C to continue the reaction until gel appears, then take it out and centrifuge it, wash it alternately with acetone and ethanol, dry it, and calcinate it at 600°C to get SiO 2 The particle size of the powder is 16-25nm.

Embodiment 3

[0021] Example three Nano ZrO 2 Powder preparation

[0022] 29.61g n-hexane, 15.90gTX-100, 5.02g n-hexanol alcohol, 2.65gH 2 O mixing, ultrasonic dispersion to prepare a transparent and uniform microemulsion system. Mix 9.87g of n-hexane, 1.48g of acetylacetone and 8.76g of zirconium oxychloride, ultrasonically disperse them and add them into the microemulsion system while stirring rapidly to fully react. After adding acetone to form a gel, take it out and centrifuge it, wash it alternately with acetone and ethanol, dry it, and calcinate it at 550°C to get ZrO 2 The particle size of the powder is 12-20nm.

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Abstract

The invention relates to a method for preparing nanometer oxide powder, which belongs to the technical field of nanometer materials. In W / O microemulsion, a former body of metal oxide is prepared by utilizing the sol-gel process generated by interfacial metal compound of the microemulsion; the generated microemulsion of the former body of the metal oxid undergoes the post treatment such as emulsion breaking, separation, washing, drying and calcining, etc. for preparing the nanometer oxide powder such as TiO2, SiO2, ZrO2 and Al2O3, etc. with particle size ranging from 8-25 nm. The method has controllable feature and size of the micro particle, simple device and easy operation, and can easily realize industrial mass production.

Description

technical field [0001] The invention relates to a preparation method of nano oxide powder, which belongs to the field of nano material preparation. Background technique [0002] Nano-oxide powders refer to powder materials with a particle size of less than 100nm, which exhibit some novel properties due to their strong surface effect, volume effect, quantum size effect and macroscopic quantum tunneling effect. For example, nano TiO 2 Because of its strong ability to absorb and scatter ultraviolet rays, it can be used in sunscreen skin care products, fibers, coatings and other fields; because of its high photocatalytic activity, it can be used in sewage treatment, antibacterial and other aspects. Nano-Al 2 o 3 Due to its high surface area and high activity, powder has been applied in high-purity ceramics, artificial jade, super filter media, recording fillers, abrasives, etc. Nano WO 3 It has a strong ability to absorb electromagnetic waves, and can be used as an absorbin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B13/14B82B3/00C01G23/08C01B33/12C01G25/02C01F7/02
Inventor 黎汉生冯光峰吴芹王仕英刘长灏
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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