A stripping solution for preparing two-dimensional nanomaterials and its application

Abstract

The invention provides a stripping solution for preparing a two-dimensional nanomaterial and application thereof. The stripping solution comprises the following components: an alcohol substance with the volume content of 0.05-59%, a methyl-containing organic solvent with the volume content of 0.03-8%, a fused ring compound with the concentration of 0.01mg / L-1g / L and the balance of water. The invention further provides application of the stripping solution. The stripping solution provided by the invention uses liquid water as a main body, so that the defects that the organic solvent is flammable and explosive are avoided, the cost is reduced, and use of strong acids and strong corrosive chemical reagents is avoided; layered solid particles are dispersed in the stripping solution, and underthe actions of mechanical shearing and ultrasonic, stripping of the layered solid particles into two-dimensional nanoflakes can be effectively accelerated, so that secondary aggregation of the two-dimensional nanoflakes is avoided.

Description

technical field [0001] The invention belongs to the field of preparation of two-dimensional nanometer materials, and in particular relates to a solution used in a liquid phase preparation method. Background technique [0002] The ideal graphene is a two-dimensional monoatomic layer graphite, which has a high specific surface area, excellent chemical and thermal stability, good electrical and thermal conductivity, excellent mechanical properties and other properties, from Geim of the University of Manchester in the United Kingdom. Since the group synthesized graphene by micro-mechanical exfoliation in 2004, it has triggered an upsurge of research on graphene and its composite materials, making graphene have great application prospects in the fields of catalysis, electronics, energy, biomedicine, and materials. At the same time, graphene-like two-dimensional nanomaterials, such as molybdenum disulfide nanoflakes and black phosphorus nanoflakes, have good catalytic hydrogen evo...

AI Technical Summary

Problems solved by technology

The CVD method is a method of depositing graphene on a solid film substrate through a gas phase reaction at a high temperature. This method can prepare high-quality, large-area graphene, but it has high costs, complicated processes, and harsh process conditions. restricted its development

Currently the most commonly used redox method, the basic principle is to treat graphite with a strong protonic acid to form a graphite interlayer compound, and then add a strong oxidant to oxidize it to form graphene oxide, which can be further reduced to obtain reduced graphene oxide, but In the production process of this method, strong acids and strong oxidants that are highly corrosive and oxidizing to chemical equipment are used, which are harmful to the environment, and the electronic structure and crystal integrity of graphene are seriously damaged. , the electrical conductivity is significantly reduced, which limits its application and industrialization in the fields of energy and electronics

The method of liquid phase mechanical exfoliation can prepare high-quality graphene and graphene-like two-dimensional nanomaterials, but its efficiency is low and the cost is high. For example, the exfoliation efficiency in pure water is relatively low, and the exfoliation efficiency in some pure organic solvents is relatively low. Although relatively high, the use of organic solvents has the characteristics of flammability, explosion, and high cost, which limits its industrial application

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