Preparation method of nano-silver particles

Abstract

The invention relates to a preparation method of nano-silver particles. The method comprises the steps that silver nitrate is dispersed in polyhydric alcohols to obtain silver nitrate dispersion liquid, and polyvinylpyrrolidone is dispersed in polyhydric alcohols to obtain polyvinylpyrrolidone dispersion liquid; and the obtained silver nitrate dispersion liquid and the obtained polyvinylpyrrolidone dispersion liquid are mixed, have a reaction and are subjected to solid-liquid separation, and the nano-silver particles are obtained. The preparation method is high in yield through one-step reaction preparation, the reaction system is simple and easy to control, and the preparation method can be used for batch production of the nano-silver particles.

Description

technical field [0001] The invention belongs to the field of metal materials, and relates to a method for preparing metal materials, in particular to a method for preparing nano silver particles. Background technique [0002] Silver nanomaterials are a kind of nanomaterials. Among all kinds of metal nanomaterials, silver nanomaterials have attracted people's attention since their appearance, not only because of their unique electronic, optical, mechanical and catalytic properties, but also have good antibacterial properties, biocompatibility Advantages such as high performance and easy surface modification. Therefore, silver nanomaterials are very useful nanomaterials, which can be used as biomedical materials, chemical catalysts, ceramic materials, sewage treatment, coatings, high-performance electrode materials, etc. The preparation and improvement technology of silver nanomaterials has become a hot spot widely concerned by researchers and developers since the beginning ...

AI Technical Summary

Problems solved by technology

At present, the synthesis method of nano-silver is generally obtained by reducing silver ions with a specific reducing agent through a multi-step reaction. This method has complex processes, many types of reactants, and the reaction is not easy to control. It is not suitable for large-scale synthesis of nano-silver particles.

[0003] CN105855562A discloses a method for preparing nano silver powder, which adopts silver ammonia solution and ascorbic acid and adds maleic anhydride to carry out liquid phase reduction reaction to prepare nano silver sol, wherein ascorbic acid is used as reducing agent, maleic anhydride is used as protective agent, and ammonia solution is used as solvent , this method has many types of reactants, complex reaction steps, many by-products obtained from the reaction, cumbersome post-treatment process and low yield, which greatly increases the production cost

[0004] CN104338936A discloses a synthetic method for stable silver nanoparticles, which uses a mixed solution of kiwi fruit juice, sodium hydroxide and silver nitrate to synthesize stable nano silver particles, including the preparation of kiwi fruit juice and the synthesis of nano silver particles, water is a solvent , silver nitrate is the silver source, kiwi fruit juice is the reducing agent, and sodium hydroxide is the dispersing agent. The steps of this invention are cumbersome, and it is not easy to control, the yield is not high, there are many types of reactants, many reaction by-products, and the post-treatment process is complicated. , which increases the production cost

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