▎ 摘　　要

NOVELTY - Preparing graphene porous film comprises e.g. (i) adding graphite oxide into water to obtain graphite oxide dispersion, and carrying out ultrasonic dispersion to obtain graphene oxide solution, (ii) adding pore-forming agent to graphene oxide solution, dispersing pore-forming agent in graphene oxide, sucking, and/or drying to obtain composite film of graphene oxide and pore-forming agent, (iii) reducing composite film of graphene oxide and pore-forming agent, and washing to obtain composite film of graphene and pore-forming agent, and (iv) removing pore-forming agent, and drying. USE - The method is useful for preparing graphene porous film (claimed). ADVANTAGE - The method has high yield, simple preparation process, and produces graphene porous film having pore size of 100-1000 nm. DETAILED DESCRIPTION - Preparing graphene porous film comprises (i) adding graphite oxide into water to obtain graphite oxide dispersion, and carrying out ultrasonic dispersion to obtain graphene oxide solution, (ii) adding pore-forming agent to graphene oxide solution, dispersing pore-forming agent in graphene oxide, sucking, and/or drying to obtain composite film of graphene oxide and pore-forming agent, (iii) reducing composite film of graphene oxide and pore-forming agent, and washing to obtain composite film of graphene and pore-forming agent, and (iv) removing pore-forming agent with organic solvent under wet conditions, and then drying using critical point drying method for 1-5 hours to obtain final product.