Method for simply and conveniently preparing monodisperse magnetic nanoparticles in quantity

Abstract

The invention relates to a method for simply and conveniently preparing monodisperse magnetic nanoparticles on a large scale. The method comprises the following steps: step 1, carrying out a reflux reaction on sodium oleate and ferric chloride hexahydrate in a mixed solvent of absolute ethyl alcohol, deionized water and normal hexane to prepare an iron oleate complex; step 2, taking water as a solvent, and extracting and purifying the ferric oleate complex for multiple times; and step 3, dissolving the purified waxy ferric oleate complex and oleic acid in a 1-octadecene solvent, carrying out high-temperature decomposition, then carrying out precipitation by using ethanol, and carrying out centrifugation and drying to obtain monodisperse magnetic nanoparticles. According to the method for simply and conveniently preparing the monodisperse magnetic nanoparticles on a large scale, the reaction conditions are convenient to control, product separation and purification are simple and convenient, large-scale preparation of the magnetic nanoparticles can be simply and conveniently carried out, and the sizes of the magnetic nanoparticles can be regulated and controlled through the concentration of oleic acid and the boiling point of a reaction solvent; and magnetic nanoparticles with different sizes can be conveniently prepared.

Description

Technical field[0001]The present invention relates to the field of magnetic nanomaterials, in particular a method of simply preparing a single-dispented magnetic nanoparticle.Background technique[0002]The application of magnetic nanomaterials involves various fields that have a wide range of application prospects in the fields of mechanical, electronics, optical, magnetism, chemistry, and biology. The birth of nano-science and technology will have a profound impact on human society, and It is possible to fundamentally solve many problems facing humanity, especially major issues such as energy, human health and environmental protection. The main tasks in the next century are the various new physical and chemical properties of nanomaterials. New materials and devices, through nano-material science and technology to increase their high-tech content and new products to develop nanostructures, will become the basis of new economic growth points in the next century, magnetic nanomaterials...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method for easily and massively preparing monodisperse magnetic nanoparticles, so as to solve the problem that the preparation methods of iron oxide magnetic nanoparticles in the prior art include precipitation method, impact flow method, inverse microemulsion method and sol-gel method. , polyol method, etc., the reaction conditions of these methods are difficult to control, the separation and purification of products are more complicated, and it is not easy to carry out large-scale preparation, and the problem of regulating the size of nanoparticles by adjusting experimental conditions

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