▎ 摘　　要

NOVELTY - Preparing reduced graphene oxide and trimanganese tetraoxide hybrid aerogel comprises e.g. (1) preparing graphene oxide by modified Hummer method, then purifying and configuring into a high concentration suspension, and then ultrasonically dispersing to form graphene oxide aqueous dispersion at a concentration of 5-20 mg/ml, (2) preparing nano-sheet, nanorod, nanospheres or nano-flower of manganese dioxide nanoparticle, followed by repeatedly washing with ethanol and deionized water for purification, and then adding de-ionized water into the precipitate, ultrasonically dispersing to obtain manganese dioxide nanoparticle colloid solution with concentration of 0.1-10 mg/ml; (3) mixing the aqueous graphene oxide dispersion obtained in step (1) with the manganese dioxide nanoparticle colloidal solution obtained in step (2), and then mixing the solution Ultrasonic treatment until uniform without precipitation, and then placing the mixture in a vessel for freezing, and vacuum freeze-drying. USE - The hybrid aerogel is useful in the field of capacitor, catalysis, biosensor, and lithium ion battery. ADVANTAGE - The method: has simple operation, mild conditions, low cost, and easy process enlargement, and can conveniently adjusts the density of the hybrid aerogel by the density of the frozen colloidal solution. DETAILED DESCRIPTION - Preparing reduced graphene oxide and trimanganese tetraoxide hybrid aerogel comprises (1) preparing graphene oxide by modified Hummer method, then purifying and configuring into a high concentration suspension, and then ultrasonically dispersing to form graphene oxide aqueous dispersion at a concentration of 5-20 mg/ml, (2) preparing nano-sheet, nanorod, nanospheres or nano-flower of manganese dioxide nanoparticle, followed by repeatedly washing with ethanol and deionized water for purification, and then adding de-ionized water into the precipitate, ultrasonically dispersing to obtain manganese dioxide nanoparticle colloid solution with concentration of 0.1-10 mg/ml; (3) mixing the aqueous graphene oxide dispersion obtained in step (1) with the manganese dioxide nanoparticle colloidal solution obtained in step (2), and then mixing the solution Ultrasonic treatment until uniform without precipitation, and then placing the mixture in a vessel for freezing, and then the frozen sample is vacuum freeze-drying to prepare a brown graphene oxide and manganese dioxide hybrid aerogel; and (4) placing the graphene oxide obtained in step (3) and the manganese dioxide hybrid aerogel together with the vessel in a polytetrafluoroethylene high pressure reactor in the gap between the vessel and the polytetrafluoroethylene autoclave, adding aqueous solution, salt solution, alkali solution or non-volatile acid solution to carry-out steam hydro-thermal reaction, after finishing the reaction, taking out the sample, drying in vacuum at room temperature and demolding to obtain the black reduced graphene oxide and trimanganese tetraoxide hybrid aerogel.