Preparation method of graphene

Abstract

A preparation method of graphene comprises the steps of: dispersing the graphite in an ionic liquid to form a mixture of graphite and ionic liquid; placing the mixture of graphite and ionic liquid in a ball-milling container, adding milling balls to carry out ball-milling, so as to obtain a slurry; taking the slurry out of the ball-milling container, separating the milling balls and conducting centrifugation and separation to obtain a graphene solution; and carrying out filtering, washing and drying treatment on the graphene solution to obtain the graphene. The ball milling method uses the ion liquid as a solvent to prepare the graphene with good dispersion, effectively prevents re-agglomeration of the graphite, and realizes large reaction amount, high yield and high specific surface area of the obtained graphene.

Description

technical field

[0001] The invention relates to the technical field of organic semiconductor materials, in particular to a preparation method of graphene. Background technique

[0002] Graphene is a two-dimensional carbon atom crystal discovered by Andre K. Geim of the University of Manchester in 2004, and won the Nobel Prize in Physics in 2010, which once again sparked an upsurge in carbon material research. Due to its unique structure and photoelectric properties, it has become a research hotspot in the fields of carbon materials, nanotechnology, condensed matter physics and functional materials, attracting many scientific and technological workers. Single-layer graphene has excellent electrical and thermal conductivity and low thermal expansion coefficient, and its theoretical specific surface area is as high as 2630m2 / g (A Peigney, Ch Laurent, et al. Carbon, 2001, 39, 507), which can be used for effect transistors, electrode materials , composite materials, liquid cryst...

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