Preparation method of copper/graphene core-shell structure

Abstract

The invention provides a preparation method of a copper / graphene core-shell structure. The preparation method comprises the following steps: putting copper nanoparticles / copper nanospheres into a CVD(Chemical Vapor Deposition) tubular furnace; introducing a carbon source under a mixed atmosphere of hydrogen gas and argon gas; enabling graphene to grow on the surfaces of the copper nanoparticles / copper nanospheres to form an initial core-shell structure; putting the initial core-shell structure into a graphene dispersion solution with an equivalent size and stirring to obtain the copper / graphene core-shell structure. The copper / graphene core-shell structure prepared by the method provided by the invention can be used for effectively protecting nano-copper and increasing the elasticity andtoughness of a composite material; the graphene and copper are firmly combined; the preparation method has the advantages of simple steps and less pollution and is suitable for industrial or laboratory operation.

Description

technical field [0001] The invention relates to the field of preparation of new materials, in particular to a method for preparing a copper / graphene core-shell structure. Background technique [0002] The limited and expensive resources of gold, silver, and platinum group metals restrict their large-scale promotion and application. Copper nanoparticles, which are rich in resources and relatively cheap, are regarded as ideal substitutes for noble metal nanoparticles. Copper nanoparticles are used as thermal hydrogen generators, gel propellants, combustion activators, catalysts, water cleaning adsorbents, sintering activators, etc. Although the copper atoms in nano-copper are the same as those of ordinary copper, they do not change the state of matter , but nano-copper particles are very small, and their chemical properties are more active than ordinary copper. The particles are easy to agglomerate, and it is easy to form an oxide film on the surface when exposed to the air. ...

AI Technical Summary

Problems solved by technology

The present invention directly grows single-layer / multilayer graphene on the surface of copper nanoparticles / copper nanospheres, or wraps incomplete and discontinuous graphene small sheets / quantum dots, single-layer graphene / multilayer graphene / discontinuous The combination of graphene small flakes / graphene quantum dots and copper nanoparticles / copper nanospheres is very strong, which overcomes the shortcomings of uneven composite and weak connection between graphene and copper particles in other methods; further use of graphene sheets in solution Layers can be superimposed on each other. The graphene sheets in the solution and the graphene / graphene quantum dots tightly attached to the outside of the copper nanoparticles / copper nanospheres are continuously superimposed to form a multilayer graphene shell.

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