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Method for preparing aluminum oxide nano-particles

A kind of alumina nano-particle technology, applied in the direction of alumina/aluminum hydroxide, nanotechnology, etc., can solve the problem of high roasting temperature, and achieve the effect of high purity, high dispersion and uniform shape and structure

Inactive Publication Date: 2012-09-26
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses water as the dispersion system, the calcination temperature is relatively high, and it is not suitable for the preparation of nano-alumina particles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The preparation method of the alumina nanoparticles of the present embodiment is:

[0015] Weigh 10g of aluminum nitrate, 7.5g of urea, and 1g of 1-butyl-3-methylimidazole chloride (BmimCl), dissolve them in deionized water and add them to a stainless steel reaction kettle with a filling degree of 90%, and seal them at 120°C Heat preservation reaction for 10 hours, cool naturally, take out the product, suction filter, wash, transfer to a drying oven, heat at 55°C for 30 minutes, then heat up to 75°C for 30 minutes, then heat up to 90°C, take out after heat preservation for 8 hours, and calcined at 450°C 10h, naturally cooled to room temperature, you can get Al 2 o 3 nanoparticles. al 2 o 3 The size range of the nanoparticles is 10-18nm, with an average particle size of 14nm.

Embodiment 2

[0017] The preparation method of the alumina nanoparticles of the present embodiment is:

[0018] Weigh 15g of aluminum nitrate, 13.7g of urea, and 0.75g of 1-butyl-3-methylimidazole chloride (BmimCl), dissolve them in deionized water and add them to a stainless steel reaction kettle with a filling degree of 90%. Airtight heat preservation reaction for 8 hours, natural cooling, take out the product, suction filtration, washing, transfer to a dry box, heat at 60°C for 20 minutes, then heat up to 80°C for 20 minutes, then heat up to 100°C, hold for 6 hours, take it out, and store it at 500°C Calcined for 8h, cooled naturally to room temperature, you can get Al 2 o 3 nanoparticles. al 2 o 3 The size range of nanoparticles is 10-20nm, with an average particle size of 15nm.

Embodiment 3

[0020] The preparation method of the alumina nanoparticles of the present embodiment is:

[0021] Weigh 20g of aluminum nitrate, 15g of urea, and 0.5g of 1-butyl-3-methylimidazole chloride (BmimCl), dissolve them in deionized water and add them to a stainless steel reaction kettle with a filling degree of 90%, and seal them at 170°C Heat preservation reaction for 6 hours, cool naturally, take out the product, suction filter, wash, transfer to a drying oven, heat at 65°C for 10 minutes, then raise the temperature to 85°C and hold for 10 minutes, then raise the temperature to 110°C, take it out after holding for 4 hours, and calcined at 600°C 4h, naturally cooled to room temperature, you can get Al 2 o 3 nanoparticles. al 2 o 3 The size range of the nanoparticles is 13-19nm, with an average particle size of 16nm.

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Abstract

The invention discloses a method for preparing aluminum oxide nano-particles, comprising the following steps of: 1), uniformly mixing aluminum nitrate, urea and chlorinated 1-butyl-3-methylimidazole with the mass ratio of (10-20):(7.5-15):(0.5-1); 2) dissolving a mixture which is obtained in the step 1) by deionized water, reacting for 6-10 hours in sealing and heat preservation modes under the temperature of between 120 and 170 DEG C to naturally cool, and filtering, washing and drying a product; and 3) calcining the product which is prepared in the step 2) for 4-10 hours at the temperature of between 450 and 600 DEG C, and naturally cooling the product to the room temperature to prepare Al2O3 nano-particles. According to the method for preparing aluminum oxide nano-particles, the chlorinated 1-butyl-3-methylimidazole (BmimCl) and water are used as a dispersing system, aluminum nitrate and urea serving as a slow release formulation can be uniformly dispersed, and OH- in the urea can be more uniformly and slowly released so as to prepare aluminium hydroxide gel with high dispersion degree, high purity and uniform morphological structure; the aluminium hydroxide gel is calcined at the temperature which is subjected to temperature disclosure to prepare aluminum oxide nano-particles; and the granularity of the prepared aluminum oxide nano-particles is uniform and the granularity distribution is within the range of 10 to 20nm.

Description

technical field [0001] The present invention relates to a kind of aluminum oxide (Al 2 o 3 ) The method for preparing nanoparticles belongs to the method for preparing inorganic nanomaterials. Background technique [0002] Nanomaterials have many new features that traditional materials do not have. The characteristics of nanomaterials in terms of structure, photoelectricity and chemical properties have aroused great interest from researchers in the fields of physics, materials and chemistry. In recent years, nanotechnology has been greatly favored by countries all over the world, especially developed countries. Countries all over the world have regarded the research and development of nanotechnology as the driver of technological innovation in the 21st century and triggered increasingly fierce competition. Nano-alumina powder has broad application prospects in chemical industry, ceramics and other industries, especially one-dimensional Al 2 o 3 Because of its high elasti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/02B82Y40/00
Inventor 马向东魏世忠李保元张国赏徐流杰李继文周玉成张公明
Owner HENAN UNIV OF SCI & TECH
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