▎ 摘　　要

NOVELTY - A porous graphene film preparing method involves preparing a porous alpha-aluminum oxide matrix by colloidal filtration method, preparing a nanoparticle sol precursor of gadolinium-doped cerium oxide by ultrasonic chemical precipitation, depositing a layer of cerium-gadolinium-oxygen gadolinium-doped cerium oxide precursor film on the porous alpha-aluminum oxide substrate, and preparing a gadolinium doped cerium oxide buffer layer by drying and rapid annealing, applying different concentrations of graphene oxide suspension to the alpha-aluminum oxide supported gadolinium doped cerium oxide buffer layer by spin coating process, using an hydrogen atmosphere thermal reduction process to remove the oxygen-containing functional groups on the graphene oxide, and introducing the pores into the graphene skeleton to obtain the finished product. USE - Method for preparing porous graphene film. ADVANTAGE - The method enables preparing porous graphene film with excellent market prospect, better chemical stability, better mechanical performance and separation performance. DETAILED DESCRIPTION - A porous graphene film preparing method involves preparing a porous alpha-aluminum oxide matrix by colloidal filtration method, preparing a nanoparticle sol precursor of gadolinium-doped cerium oxide by ultrasonic chemical precipitation, depositing a layer of cerium-gadolinium-oxygen (Ce(0.9)Gd(0.1)O(1.95)) gadolinium-doped cerium oxide precursor film on the porous alpha-aluminum oxide substrate, and preparing a gadolinium doped cerium oxide buffer layer by drying and rapid annealing, applying different concentrations of graphene oxide suspension to the alpha-aluminum oxide supported gadolinium doped cerium oxide buffer layer by spin coating process, using an hydrogen atmosphere thermal reduction process to remove the oxygen-containing functional groups on the graphene oxide, and introducing the pores into the graphene skeleton to obtain the finished product.