▎ 摘　　要

NOVELTY - A nanoporous graphene has a pore structure for nanopores. The nanopores have aperture of 20-100 nm, preferably 40-70 nm. USE - Nanoporous graphene is used for forming graphene film for nano-composite material, transparent conductive electrode, storage device e.g. capacitor, lithium ion battery and/or solar cell (all claimed). ADVANTAGE - The nanoporous graphene is easily manufactured with high productivity. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) manufacture of nanoporous graphene, which involves dispersing chemically converted graphene in nitric acid aqueous solution to carry out reflux reaction, washing and converting to neutrality, and drying; and (2) graphene film, which is formed using nanoporous graphene.