▎ 摘　　要

NOVELTY - Method comprises (i) dividing film preparation into electrostatic spinning part of peroxyacyl nitrates solution and ethanol parts of ultrasonic spraying graphene oxide, simultaneously carrying out preparation on both sides of receiving device, dissolving peroxyacyl nitrates in a solvent to obtain a peroxyacyl nitrates solution, preparing ethanol solution of graphine oxide, ultrasonically spraying peroxyacyl nitrates solution onto the fiber membrane prepared by electrospinning, performing electrospinning and ultrasonic spraying simultaneously on receiving device sides and wrapping or sandwiching graphene oxide sheet in the membrane structure during the fiber formation process to obtain polyacrylonitrile electrospun nanofiber and graphene oxide composite film, and (ii) preparing a dopamine aqueous solution, and immersing polyacrylonitrile electrospinning nanofibers and graphene oxide composite film in dopamine aqueous solution, stirring, washing membrane with water and freeze-drying. USE - The nanocomposite fiber membrane is useful for removing ionic dyes and heavy metal ions in industrial wastewater. ADVANTAGE - The nanocomposite fiber membrane has a good filtering effect on ionic dyes and heavy metal ions, complete and stable structure, better mechanical properties. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for nano-composite fiber film prepared by the method