▎ 摘　　要

NOVELTY - Preparing porous nanofiber material, comprises performing electrospinning and freeze-drying process based on polyacrylonitrile (PAN), polyethyleneimine (PEI) and graphene oxide, then taking PAN as framework, PEI as adsorbent and crosslinking agent, and graphene oxide as reinforcing component to obtain final product. USE - The porous nanofiber material is useful in preparing adsorbent for adsorbing metal ions and organic dyes (claimed). ADVANTAGE - The porous nanofiber material utilizes raw materials and reagents are cheap and readily available, provides efficient solution to mechanical properties and adsorption properties of adsorbent materials, has excellent adsorption properties for metal ions and organic dyes and solves the problems that existing materials cannot be reused and easy to be crushed. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for porous nanofiber material obtained by above method.