▎ 摘　　要

NOVELTY - Preparation of heterostructure porous graphene oxide film involves freeze-drying graphene oxide solution, obtaining a graphene oxide aerogel, heating, reducing, and applying pressure to resultant product in vertical direction. USE - Preparation of heterostructure porous graphene oxide film used for forming graphene film for generator (all claimed). ADVANTAGE - The method enables economical, simple, efficient and easy preparation of heterostructure porous graphene oxide film using easily and widely available raw materials. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) graphene film, which is formed using the graphene oxide film, and has a porous structure. The graphene oxide includes uniformly distributed oxygen-containing functional group; and (2) generator, which comprises the graphene film connected with metal electrode.