Metal oxide nanoparticles and preparation method of metal oxide nanoparticles

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 ...

AI Technical Summary

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 impregnation method (2019101041603). Development of metal oxides and metal nanoparticles, but these methods still have disadvantages such as complex process and uneven particle size, making it difficult to prepare highly crystalline and highly dispersed nanoparticles on a large scale

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