▎ 摘　　要

NOVELTY - Preparing graphene involves mixing graphite and carbon nanofibrils in a solvent to form a mixture comprising graphene at a concentration of 0.01mg per mL. USE - Method for preparing graphene used in nanopaper (claimed). DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a nanopaper, which comprises cellulose nanofibrils and graphene; and (2) a method for preparing a nanopaper comprising cellulose nanofibrils and graphene, which involves forming an aqueous suspension of cellulose nanofibrils and graphene; and vacuum filtering the aqueous suspension.