Preparation method for nano metal oxide graphene composite material

Abstract

The invention relates to a preparation method for a nano metal oxide graphene composite material. The preparation method comprises the following steps: preparing graphite oxide aqueous dispersion from graphite oxide and water; throwing the graphite oxide aqueous dispersion into a ball-milling tank of a ball mill; adding nitrate and performing ball milling, wherein the nitrate is selected from one of or a mixture of more of silver nitrate, cobalt nitrate, manganese nitrate, ferric nitrate, nickel nitrate, bismuth nitrate, copper nitrate, cerium nitrate, vanadium nitrate, chromium nitrate, titanium nitrate, beryllium nitrate and vanadium nitrate; and after ball milling, dispersing the mixed liquid obtained by ball milling by using a proper amount of deionized water, standing and layering, filtering out precipitate, washing and drying. The preparation process is simple; the yield is high; the scale is easy to enlarge so as to realize industrialized production; the preparation process is environment-friendly; and in the prepared composite material, the nano metal oxide has the particle size of less than 50 nm, is uniform in size and is dispersed on the surface of graphene uniformly, the thickness of the graphene sheet is between 1 and 10 carbon atoms, and a good crystal structure is obtained.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a preparation method of a nanometer metal oxide graphene composite material. Background technique [0002] Graphene has unique properties such as huge specific surface area, high electrical conductivity, good physical and chemical stability and biocompatibility, so since its discovery in 2004, graphene-based composite materials based on graphene It has always been a hot topic of research. [0003] Graphene-based nanocomposites can be widely used in catalysis, degradation, energy storage, etc. There are two main methods for the preparation of graphene-based composite materials. One is to prepare composite materials using graphene oxide as a precursor. Since graphene oxide contains a large number of chemical functional groups (hydroxyl, carboxyl, epoxy), these groups It can be effectively used as the binding site of nano-metal particles, so that graphene h...

AI Technical Summary

Problems solved by technology

However, in the reduction process of graphene oxide, the degree of reduction is generally difficult to control, and some reducing agents used in the reduction process have certain pollution to the environment; Metal particles generally have a larger size structure, which has a certain impact on the performance of composite materials

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