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Preparation method of metal oxide nanoparticles and metal nanoparticles

A metal nanoparticle, nanoparticle technology, applied in the preparation of oxide/hydroxide, ferrous oxide, nanotechnology and other directions, to achieve the effects of good crystallinity, simple preparation method and easy large-scale production

Active Publication Date: 2019-04-26
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, it is difficult to avoid agglomeration and sintering during high-temperature calcination and decomposition during the preparation of metal oxides and metal nanoparticles, and the existing technology is difficult to solve this problem

Method used

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  • Preparation method of metal oxide nanoparticles and metal nanoparticles
  • Preparation method of metal oxide nanoparticles and metal nanoparticles

Examples

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Embodiment 1

[0036] Example 1: Prepare a solution with a concentration of 0.1 mol / L with iron acetylacetonate and ethanol, impregnate potassium sulfate powder, remove excess impregnating liquid, and dry the powder. The dried powder is calcined at 200°C to below 500°C, washed with water and dried to obtain γ ferric oxide nanoparticles; if calcined at 500°C to 1000°C for 2 hours, washed with water and dried to obtain α ferric oxide nanoparticles Particles; if reduced between 400°C and 500°C, ferric oxide nanoparticles can be obtained after washing and drying.

Embodiment 2

[0037] Example 2: Prepare a solution with a concentration of 0.1 mol / L with iron acetylacetonate and chloroform, impregnate potassium sulfate powder, remove excess impregnating liquid, and dry the powder. The dried powder is calcined at 200°C to below 500°C, washed with water and dried to obtain γ ferric oxide nanoparticles; if calcined at 500°C to 1000°C for 2 hours, washed with water and dried to obtain α ferric oxide nanoparticles Particles; if reduced between 400°C and 500°C, ferric oxide nanoparticles can be obtained after washing and drying.

Embodiment 3

[0038] Example 3: A solution with a concentration of 0.1 mol / L was prepared with iron acetylacetonate and acetone, impregnated with potassium sulfate powder, and after removing excess impregnating liquid, the powder was dried. The dried powder is calcined at 200°C to below 500°C, washed with water and dried to obtain γ ferric oxide nanoparticles; if calcined at 500°C to 1000°C for 2 hours, washed with water and dried to obtain α ferric oxide nanoparticles Particles; if reduced between 400°C and 500°C, ferric oxide nanoparticles can be obtained after washing and drying.

[0039]Example 3: Prepare a solution with a concentration of 0.01 mol / L with iron acetylacetonate and chloroform, impregnate potassium sulfate powder, remove excess impregnating liquid, and dry the powder. The dried powder is calcined at 200°C to below 500°C, washed with water and dried to obtain γ ferric oxide nanoparticles; if calcined at 500°C to 1000°C for 2 hours, washed with water and dried to obtain α fe...

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Abstract

The invention discloses a preparation method of metal oxide nanoparticles and metal nanoparticles. The preparation method comprises the following steps: dissolving metal acetylacetonate in an organicsolvent to obtain impregnation liquid, impregnating water-soluble inorganic salt, drying, then calcining or reducing at high temperature, and washing with water to obtain the dispersed metal oxide nanoparticles or metal nanoparticles. A calcined product is secondarily calcined in a reducing atmosphere, and dispersed metal nanopowder can be obtained after water washing. By adopting the preparationmethod, the metal oxide nanoparticles or the metal nanoparticles with good dispersibility and perfect crystallization can be prepared in batches.

Description

technical field [0001] The invention relates to a preparation technology of metal oxide nanoparticles and metal nanoparticles, and belongs to the field of nano powder preparation. Background technique [0002] Metal oxides and metal nanoparticles have quantum size effect, surface effect, volume effect and macroscopic quantum tunneling effect, so they have unique thermal, optical, electrical, magnetic and chemical properties, and have been widely used in electronics, chemical industry, biology, medicine and other fields. Widely used, the innovation of the preparation technology of metal oxides and metal nanoparticles has always been the focus of research and production. [0003] Nanoparticles have a strong tendency to agglomerate, how to prevent the agglomeration and sintering of nanoparticles is the key and difficult point in the preparation technology of nanopowders. The existing nanoparticle preparation technology generally has the problems of low preparation temperature,...

Claims

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Application Information

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IPC IPC(8): C01B13/18B82Y40/00C01G49/08B22F9/24
CPCB22F9/24B82Y40/00C01B13/18C01G49/08C01P2004/30C01P2004/64
Inventor 董岩唐振明杨凯成邵起越蒋建清
Owner SOUTHEAST UNIV
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