▎ 摘　　要

NOVELTY - Preparing porous graphene dispersion liquid attached with oxygen-containing group comprises (i) determining initial temperature of the reaction of graphene and oxygen by firstly subjecting graphene raw material to thermogravimetric test in an oxygen atmosphere, (ii) preparing porous graphene with oxygen-containing groups attached by heat treatment in an oxygen-containing atmosphere by adding graphene raw material in a high-temperature furnace, increasing the temperature above the initial weight loss temperature at a certain heating rate, transforming part of the carbon in graphene into gaseous carbon oxide, (iii) dispersing the porous graphene attached with oxygen containing group in polar solvent to obtain porous graphene dispersion with attached oxygen-containing group by taking porous, adding the graphene attached with oxygen-containing group to a certain volume of polar solvent, adding dispersing agent according to the need of graphene dispersion, and ultrasonically dispersing. USE - The method is useful for preparing porous graphene dispersion liquid attached with oxygen-containing group. ADVANTAGE - The method: avoids the use of strong corrosion reagent e.g. strong acid and strong oxidizer and complicated preparation and classification process. The graphene dispersion liquid can be uniformly dispersed stably for a long time. DETAILED DESCRIPTION - Preparing porous graphene dispersion liquid attached with oxygen-containing group comprises (i) determining the initial temperature of the reaction of graphene and oxygen by firstly subjecting graphene raw material to thermogravimetric test in an oxygen atmosphere at a heating rate of 5-10 degrees C/minute, determining the initial weight loss temperature of graphene, (ii) preparing porous graphene with oxygen-containing groups attached by heat treatment in an oxygen-containing atmosphere by adding graphene raw material in a high-temperature furnace, increasing the temperature above the initial weight loss temperature at a certain heating rate, introducing small flow of oxygen-containing atmosphere, heating for multiple hours, attaching a large number of oxygen-containing functional groups to the graphene, transforming the part of the carbon in graphene into gaseous carbon oxide, leaving a large amount of pores in situ, and ensuring graphene have the characteristics of a porous structure, (iii) dispersing the porous graphene attached with oxygen containing group in polar solvent to obtain porous graphene dispersion with attached oxygen-containing group by taking porous, adding the graphene attached with oxygen-containing group to a certain volume of polar solvent; adding dispersing agent according to the need of graphene dispersion, ultrasonically dispersing or high speed cutting step to obtain porous graphene dispersion liquid attached with oxygen-containing group. An INDEPENDENT CLAIM is also included for porous graphene dispersion liquid attached with oxygen-containing group, prepared by above method.