Metal oxide nanoparticles and preparation method of metal oxide nanoparticles

A metal nanoparticle and nanoparticle technology, which is applied in the preparation of alumina/hydroxide, chemical instruments and methods, zirconia, etc., can solve the problems of complex process, uneven particle size, and difficult preparation of nanoparticles

Pending Publication Date: 2020-06-23
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the early stage, the project team used various methods such as water-soluble sulfate coprecipitation method (Chinese patent CN201810037875.7), water-soluble salt nanoparticle isolation method (Chinese patent CN201810037620.0) and metal acetylacetonate solution impregn...

Method used

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  • Metal oxide nanoparticles and preparation method of metal oxide nanoparticles
  • Metal oxide nanoparticles and preparation method of metal oxide nanoparticles
  • Metal oxide nanoparticles and preparation method of metal oxide nanoparticles

Examples

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Embodiment 1

[0039] Example 1: An organosol was prepared by dissolving aluminum nitrate and citric acid in ethylene glycol methyl ether, wherein the molar concentration of aluminum was 0.1M, and the molar ratio of aluminum nitrate and citric acid was 1:0.5. Mix the organosol and potassium sulfate, and pour off the excess organosol after sedimentation to obtain a mixture of the organosol and potassium sulfate. The mixture was kept at 60°C to 120°C and dried to obtain a loose powder. The powder is calcined at 400°C to below the melting point of potassium sulfate, and the calcined product is washed with water and dried to obtain highly crystalline and highly dispersed alumina nanoparticles.

Embodiment 2

[0040] Example 2: An organosol was prepared by dissolving aluminum nitrate and citric acid in ethylene glycol methyl ether, wherein the molar concentration of aluminum was 0.1M, and the molar ratio of aluminum nitrate and citric acid was 1:0.5. Mix the organosol with sodium sulfate, and pour off the excess organosol after sedimentation to obtain a mixture of the organosol and potassium sulfate. The mixture was kept at 60°C to 120°C and dried to obtain a loose powder. The powder is calcined at 400°C to below the melting point of sodium sulfate, and the calcined product is washed with water and dried to obtain highly crystalline and highly dispersed alumina nanoparticles.

Embodiment 3

[0041] Example 3: An organosol was prepared by dissolving aluminum nitrate and citric acid in ethylene glycol methyl ether, wherein the molar concentration of aluminum was 0.1M, and the molar ratio of aluminum nitrate and citric acid was 1:0.5. Mix the organic sol with potassium chloride, and pour off the excess organic sol after sedimentation to obtain a mixture of the organic sol and potassium sulfate. The mixture was kept at 60°C to 120°C and dried to obtain a loose powder. The powder is calcined at 400° C. to below the melting point of potassium chloride, and the calcined product is washed with water and dried to obtain highly crystalline and highly dispersed alumina nanoparticles.

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Abstract

The invention discloses a metal oxide nanoparticle and a preparation method of the metal oxide nanoparticle, which comprises the following steps: preparing an organosol containing the metal element, mixing the organosol with a water-soluble salt, performing standing or centrifuging to precipitate the water-soluble salt, removing the superfluous organosol at the upper part, and keeping the temperature to convert the organosol into gel; along with evaporation of the solvent, shrinking the gel, and coating the surfaces of the water-soluble salt particles with a layer of xerogel film; and calcining the sample at a high temperature between 400 DEG C and a salt melting point, converting the dry gel film into metal oxide nanoparticles, dispersing and attaching the nanoparticles to the surfaces ofwater-soluble salt particles, cooling, and washing with water to remove the salt, thereby obtaining the high-dispersion metal oxide nanoparticles; if the calcined product is reduced in a reducing atmosphere, converting the metal oxide nanoparticles attached to the surfaces of the water-soluble salt particles into corresponding metal nanoparticles, cooling, and washing with water to obtain the high-dispersion metal nanoparticles. According to the method, the high-crystallinity and high-dispersion metal oxide and metal nanoparticles can be rapidly prepared in batches.

Description

technical field [0001] The invention relates to a technology for preparing metal oxide nanoparticles and metal nanoparticles, and belongs to the technical field of nanoparticle material preparation. Background technique [0002] Metal oxide and metal nanoparticle materials refer to zero-dimensional materials with a size <100nm. Nanoparticles have surface effects, quantum size effects, volume effects and macroscopic quantum tunneling effects, so they have unique thermal, optical, electrical, magnetic and chemical properties. It is widely used in electronics, chemical industry, machinery, biomedicine and other fields. [0003] However, nanoparticle materials are prone to agglomeration and sintering during the preparation process, making it difficult to prepare highly dispersed nanoparticles. At present, metal oxide nanoparticles are mainly prepared by liquid phase method, and there are three commonly used liquid phase methods: chemical precipitation method, sol-gel method ...

Claims

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Application Information

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IPC IPC(8): C01F7/30C01G25/02C01G53/04C01G51/04B22F9/22B82Y30/00B82Y40/00
CPCC01F7/308C01G25/02C01G53/04C01G51/04B22F9/22B82Y30/00B82Y40/00C01P2004/64
Inventor 董岩徐勤勤罗心怡刘睿邵润宁尚超常博张丁铄干钰霄蒋建清
Owner SOUTHEAST UNIV
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