▎ 摘　　要

NOVELTY - Preparing graphene/porous zinc oxide composite film comprises e.g. (i) preparing an aqueous dispersion of graphene oxide, placing it in a vacuum suction device to form a graphene oxide film, drying and removing the graphene oxide film from the surface of the filter paper to form a self-supporting graphene oxide film; (ii) carrying out pre-reduction of graphene oxide film to form partially reduced graphene oxide film; (iii) placing the partially reduced graphene oxide film in a hydrothermal reaction kettle, utilizing the hydrothermal reaction method to grow porous zinc oxide on the film surface, nucleating zinc oxide preferentially during the reaction and growing on the micro-regions on the surface of the partially reduced graphene oxide film that is slightly separated from the main body of the film and into continuous porous oxide zinc; and (iv) carrying out reduction of the film, reducing the film with porous zinc oxide, and constructing a graphene/porous zinc oxide composite film. USE - The graphene/porous zinc oxide composite film is useful in fields of photocatalysis, sensors and supercapacitors (all claimed). ADVANTAGE - The method: is simple; does not introduce a porous template; can retains the mechanical and electrical characteristics of the original graphene film; allows porous zinc oxide grown in situ on the surface of graphene tightly coupled with the graphene film with clear the interface; and produces composite film with excellent properties. DETAILED DESCRIPTION - Preparing graphene/porous zinc oxide composite film comprises (i) preparing an aqueous dispersion of graphene oxide, placing it in a vacuum suction device to form a graphene oxide film, drying and removing the graphene oxide film from the surface of the filter paper to form a self-supporting graphene oxide film; (ii) carrying out pre-reduction of graphene oxide film to form partially reduced graphene oxide film; (iii) placing the partially reduced graphene oxide film in a hydrothermal reaction kettle, utilizing the hydrothermal reaction method to grow porous zinc oxide on the film surface, nucleating zinc oxide preferentially during the reaction and growing on the micro-regions on the surface of the partially reduced graphene oxide film that is slightly separated from the main body of the film and into continuous porous oxide zinc; and (iv) carrying out reduction of the film, after completing the growth of the porous zinc oxide, reducing the film loaded with the porous zinc oxide to the desired reduction degree, and constructing a graphene/porous zinc oxide composite film with adjustable reduction degree. An INDEPENDENT CLAIM is also included for a graphene/porous zinc oxide composite film, prepared as mentioned above.