Graphene prepared by using edge functionalization of graphite

摘要

Disclosed is a method for producing graphene functionalized at its edge positions of graphite. Organic material having one or more functional groups is reacted with graphite in reaction medium comprising methanesulfonic acid and phosphorus pentoxide, or in reaction medium comprising trifluoromethanesulfonic acid, to produce graphene having organic material fuctionalized at edges. And then, high purity and large scaled graphene and film can be obtained by dispersing, centrifugal separating the functionalized graphene in a solvent and reducing, in particular heat treating the graphene. According to the present invention graphene can be produced inexpensively in a large amount with a minimum loss of graphite. (FIG. 1)

主权项

1. A method for production of an edge-functionalized graphene comprising:
providing graphite; reacting organic material having one or more functional groups with the graphite in a reaction medium comprising methanesulfonic acid and phosphorus pentoxide, or in a reaction medium comprising trifluoromethanesulfonic acid, thus to substitute force of edge positions between graphene sheets with covalent bonds between graphene and organic material, wherein the one or more functional groups include one or more selected from a group consisting of carboxylic acid group, amide group, sulfonic acid group, carbonyl chloride group and carbonyl bromide group, and wherein the organic material covalently attached to graphene acts as a wedge, and thereby exfoliating graphene functionalized at its edge positions.