Abstract:
An easy and effective method for purifying graphene powder by removing magnetic impurities, wherein magnetic impurities are incorporated during the process of fabricating the graphene powder, is provided. The method for purifying graphene powder, the method including: (1) ball-milling a graphite material to form graphene powder; (2) dispersing the graphene powder in a solvent to form a suspension; and (3) separating magnetic impurities during stirring the suspension, by using a magnet, Wherein the magnetic impurities were incorporated into the graphene powder during ball-milling from the balls and dispersed in the suspension.
Abstract:
Disclosed is a method for fabricating graphene ribbons which are high-functional carbon materials. Provided a method of fabricating graphene ribbons, including (a) preparing a carbon structure in which a graphene ribbon is spirally grown (a graphene helix), revealing a tube shape, and (b) applying energy to unroll the graphene helix into the graphene ribbons.
Abstract:
Disclosed is a method for fabricating graphene ribbons which are high-functional carbon materials. Provided a method of fabricating graphene ribbons, including (a) preparing a graphene helix carbon structure which is formed by spiral growing of a unit graphene , and (b) applying energy to the carbon structure to obtain ribbon-shaped graphenes.