Preparation method of phosphoene-graphene composite material

Abstract

The invention relates to a preparation method of a phosphoene-graphene composite material and belongs to the technical field of composite materials. The preparation method comprises the following steps: respectively grinding lamellar black phosphorus and lamellar graphite into powder; adding the powder into a solvent and uniformly mixing to obtain a mixed solution A, wherein the solvent is deionized water, an organic solvent or ionic liquid; carrying out ultrasonic pretreatment on the mixed solution A for 0.5 to 2 hours; emptying air in a high pressure homogenizer by using inert gas, putting the mixed solution A subjected to the ultrasonic pretreatment into the high pressure homogenizer and carrying out high pressure homogenization treatment under the condition that the pressure is 500 to4000 bar for 5 to 60 minutes to obtain suspension; centrifugally separating the suspension to obtain precipitate and supernatant; and carrying out freeze drying or vacuum filtration drying on the supernatant to obtain the phosphoene-graphene composite material. The phosphoene-graphene composite material prepared by the preparation method disclosed by the invention has the advantages of high electrical conductivity, thermal conductivity, flexibility, large specific surface area and high stability; and the method disclosed by the invention has the characteristics of simple operation, high efficiency, capability of realizing continuous operation, low requirements on equipment and the like.

Description

technical field [0001] The invention relates to a preparation method of a phosphorene-graphene composite material, belonging to the technical field of composite materials. Background technique [0002] Phosphorene refers to black phosphorus with few layers, which is a two-dimensional material. A large number of theoretical and experimental studies have shown that phosphorene has excellent properties, such as high carrier mobility and switching ratio, direct Band gap, high anisotropy, excellent biocompatibility, etc., have shown great potential application value in solar cells, energy storage batteries, biomedicine, field effect transistors, sensors, catalysis and other fields. Graphene is also a two-dimensional material with excellent performance, especially the mechanically exfoliated graphene, which has good optical, mechanical, thermal and other properties, making it have a good application prospect in various fields. The phosphorene-graphene composite material obtained ...

AI Technical Summary

Problems solved by technology

However, most of the methods for preparing phosphorene and graphene use liquid phase ultrasound. This method takes a long time and has low yield. At the same time, it is difficult to prepare continuously and is not suitable for large-scale preparation.

According to relevant literature reports, each phosphorus atom in phosphorene is covalently bonded to three surrounding phosphorus atoms, so there are two lone electrons outside each phosphorus atom, which can easily react with oxygen in the air, resulting in Phosphene is easily oxidized, and it is difficult to solve the stability problem of phosphorene by physical mixing

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