Method of producing graphene by stripping graphite via time-space-synchronous ultrasonic treatment and ball-milling process

Abstract

The invention discloses a method of producing graphene by stripping graphite via time-space-synchronous ultrasonic treatment and a ball-milling process. The method includes the steps of: adding a graphite raw material and a stripping reagent into an ultrasonic ball milling device and performing ball milling for 2-96 h under an ultrasonic environment; and separating, washing and drying the mixtureto obtain graphene powder. Through the time-space-synchronous ultrasonic treatment and the ball-milling process, the graphite is stripped; due to the synergistic effect of the two methods, interlayerin-situ expansion of the graphite is formed and meanwhile a strong shear force is applied to the graphite during ball milling. The method is high in efficiency and yield and is suitable for large-scale production of graphene.

Description

technical field [0001] The invention relates to a method for preparing graphene, in particular to a method for preparing graphene by exfoliating graphite through a space-time synchronous ultrasonic ball milling method. Background technique [0002] Graphene is a two-dimensional material composed of a single layer of carbon atoms. Since its discovery, graphene has attracted the attention of many researchers due to its unique properties, and has shown broad application prospects in new energy, new materials and other fields. [0003] At present, batch graphene preparation methods are mainly divided into chemical redox method, physical exfoliation method and chemical vapor deposition method. The chemical redox method has the advantage of being easy to prepare in large quantities, but it also has the disadvantage of producing a large amount of waste acid and heavy metal pollution. Although the chemical vapor deposition method can prepare graphene films and a small amount of po...

AI Technical Summary

Problems solved by technology

The ball milling method is easy to maintain and operate, and can prepare a large amount of graphene, but the method takes a long time to prepare and the yield of graphene is still low

[0006] In summary, the current mechanical exfoliation method still has the disadvantages of low yield and low preparation efficiency, and there is no simultaneous use of ultrasonic and ball milling methods to simultaneously act on graphite in the same time and space to perform graphene exfoliation. The method, the synergistic exfoliation effect of ultrasonic and ball milling at the same time, makes the in-situ expansion between the graphite layers and receives the strong shear force of the ball milling, the exfoliation efficiency is greatly improved, and it is suitable for batch preparation of graphene

Images