Preparation method of nano-metal oxide

Abstract

The invention discloses a preparation method of a nano-metal oxide. The preparation method comprises the following steps that a nitrate aqueous solution is expanded under the action of an emulsifier to form a porous nitrate mixture, then the porous nitrate mixture is mixed with an oil phase to be uniform, and the mixture is put into a muffle furnace to be calcinated to obtain the corresponding nano-metal oxide. The prepared nano-metal oxide can be an oxide of a single metal element and also can be an oxide of a mixed metal of several elements. The method is simple in technology, easy and convenient to operate and beneficial for improving the stability and the particle size controllability of the nano-metal oxide, the preparation processes are simplified, the efficiency is improved, and therefore the preparation method is more beneficial for industrialized production.

Description

technical field [0001] The invention relates to the field of preparation of nanometer materials, in particular to a preparation method of one or more nanometer metal oxides. Background technique [0002] Due to surface effects, quantum size effects, small size effects, and macroscopic quantum effects, nanometer-sized materials have unique properties that raw materials do not have, making nanomaterials perform in many aspects such as thermodynamics, optics, catalysis, and biological activity. The unique physical and chemical properties make nanomaterials widely researched and applied in many fields as functional materials. [0003] Although nanomaterials have superior performance in many aspects, the preparation of the material itself is relatively complicated. In order to meet the engineering needs of nanomaterials, many people have proposed many methods to prepare nanomaterials. In nano metal oxides, for example, CN101342486A uses microwave heating to prepare nano oxides, ...

AI Technical Summary

Problems solved by technology

[0004] Looking at the current self-propagating combustion method, there are significant shortcomings in the nano-metal oxides. Since ammonium nitrate cannot achieve self-sustaining combustion at room temperature and pressure, once the external heat supply stops, the combustion will stop. This phenomenon also exists in ammonium nitrate-based mixtures. , so that the reaction rate in the ammonium nitrate mixture is slow and the combustion reaction is incomplete, so there are certain problems in the stability of the obtained nano-metal oxides

On the other hand, to prepare nano-metal oxides with citric acid or urea, the precursor needs to be prepared first. Since the precursor contains a large amount of water, a large amount of energy needs to be consumed when preparing nanoparticles, which is not conducive to industrial production.

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