Method for preparing square copper nanoparticles-graphene-foamed nickel material

Abstract

The invention provides a method for preparing a square copper nanoparticles-graphene-foamed nickel material. The method comprises the following technological steps: 1, growing a layer of graphene on a foamed nickel basal body by using a chemical vapor deposition (CVD) method to prepare a graphene-foamed nickel basal body; 2, directly immersing the graphene-foamed nickel basal body material into a CuSO4 solution to obtain a mixture, and carrying out displacement reaction on the mixture for 1-1.5 hours to obtain a square copper nanoparticles-graphene-foamed nickel composite material. The prepared square copper nanoparticles are uniformly distributed on the surface of three-dimensional framework graphene, are difficultly aggregated and are uniform in sizes; moreover, by fully utilizing synergistic effects of excellent performances such as electricity, catalysis and sensing of both of the graphene and copper particles, the prepared composite material has more reactive activity sites, is large in specific surface area, is good in biocompatibility, is good in electrical conductivity, and has wide application prospects in the fields of catalysis, biosensing, environment protection, surface-enhanced Raman scattering, energy and the like.

Description

technical field [0001] The invention provides a novel and very simple method for preparing a square copper nanoparticle-graphene-nickel foam composite material, which belongs to the technical field of material chemical preparation. Background technique [0002] Noble metal nanoparticles (gold, silver, platinum, palladium) have been widely studied due to their good electrical properties, chemical properties, catalytic properties, etc., graphene due to its high specific surface area, high conductivity and excellent chemical stability It becomes an ideal carrier for loading metal particles. Utilizing the synergistic effect of the two makes the composite material have excellent catalytic, electrochemical sensing and gas sensing properties. However, the reserves of precious metals are limited, and non-noble metal copper nanoparticles have been found to have good catalytic and sensing properties to replace noble metal nanoparticles. At present, the composite of reduced graphene o...

AI Technical Summary

Problems solved by technology

However, most of the reduced graphene oxide / copper nanoparticle composites prepared by chemical methods exist in the form of solutions, powders, and aerogels, which are difficult to recycle.

Moreover, its conductivity and mechanical properties are not as good as graphene prepared by CVD method.

At present, the composite structure of graphene and non-noble metal copper nanoparticles prepared by CVD method has also been reported, but its preparation often uses various chemical reagents to modify the surface of CVD graphene without functional groups, and then connects it with a linker. The process steps are complicated. The surface of copper particles is also coated with surface modifiers, which reduces the performance of copper nanoparticles