Method for preparing modified graphene suspension

The invention discloses a method for preparing a modified graphene suspensionThe method comprises the following steps: crushing graphite oxides into fine powder with a particle size of 5-40 microns, preparing the obtained fine powder into a suspension with a concentration of 0.5-3 mg/ml, then carrying out ultrasonic processing on the suspension so as to obtain a graphene oxide sol with a concentration of 0.5-3 mg/ml; dissolving a reductant in water or amide organic solvent, preparing the obtained product into a reductant solution with a concentration of 6-15 mg/ml, then heating the reductant solution 4-20 hours at a temperature of 30-100 DEG C so as to obtain a reaction mixture; and washing the reaction mixture by using ethanol, filtering the washed mixture, dispersing the obtained solid outliers into the ethanol or the amide organic solvent, then carrying out ultrasound processing and centrifugation on the obtained product so as to obtain the modified graphene suspension. The method disclosed by the invention has the advantages that the preparation process is simple, and the modified graphene suspension can be dispersed into the ethanol and the amide organic solvent well.