▎ 摘　　要

NOVELTY - Preparing porous graphene oxide/cellulose nano fiber composite film comprises (i) subjecting graphene oxide into hydrogen peroxide etching reaction, and preparing to obtain porous graphene oxide solution; (ii) adopting TEMPO oxidation method to obtain cellulose nano-fiber solution; (iii) uniformly mixing the porous graphene oxide in the step (i) with cellulose nano fiber solution in step (ii), forming film on the substrate by vacuum filtering method, and peeling off to obtain product. USE - The method is useful for preparing porous graphene oxide/cellulose nano fiber composite film used as high-efficiency nano-fluid device for permeation energy to generate electricity. ADVANTAGE - The method realizes composite film has high charging density, low ion transmission path and controllable size of nano channel, reduces the ion transmission resistance and keeps high ion selectivity, realizes permeation energy conversion and other nano-fluid application provides efficient method.