▎ 摘　　要

NOVELTY - Extracting graphene comprises separating graphene oxide particle from a slurry, and injecting air microbubbles to the separated graphene oxide particle and then reacting the mixture in a container, where the container is arranged for holding liquid that is acid or base. USE - The method is useful for extracting graphene using bubble method (claimed) for electronic application including battery charger for cellular phone, hydrogen fuel cell and sensor lamp. ADVANTAGE - The graphene is easy to extract, and has excellent electric conduction and thermal conduction.