▎ 摘　　要

NOVELTY - Preparing porous graphene silver antibacterial compound material comprises (a) using ultrasonic stirring graphene quantum dot suspension, adding silver nitrate solution, adding trisodium citrate dihydrate, ultrasonic stirring, aging, washing, drying to obtain supported silver graphene quantum dot, (b) adding silver loading of graphene quantum dot ultrasonic stirring, adding e.g. water, stirring, drying to obtain silicon dioxide coated by loading silver graphene quantum dots, (c) taking e.g. porous graphene, stirring, transferring into a reaction kettle, cooling, centrifuging and drying. USE - The method is useful for preparing porous graphene silver antibacterial compound material (claimed). ADVANTAGE - The porous graphene silver antibacterial compound material provides long antibacterial activity, is safe and economical. DETAILED DESCRIPTION - Preparing porous graphene silver antibacterial compound material comprises (a) using ultrasonic stirring 50-60 ml graphene quantum dot suspension, adding in a drop wise manner silver nitrate solution, controlling the reaction temperature at 45-60 degrees C, adding trisodium citrate dihydrate, continuously ultrasonic stirring for 60-120 minutes, aging, washing, drying to obtain the supported silver graphene quantum dot, (b) adding 0.1-0.5 g silver loading of graphene quantum dot ultrasonic stirring and dispersing in ethanol, adding water and aqueous ammonia in a volume ratio of 3-5:1, stirring uniformly, adding ethyl orthosilicate, adjusting the pH value to 9-10, maintaining the reaction temperature at 20-25 degrees C for 1-3 hours, centrifuging and using acetone and deionized water, washing to obtain precipitate, drying the precipitate for 3h at 90 degrees C to obtain silicon dioxide coated by loading silver graphene quantum dots, (c) taking silicon dioxide coated silver surface treatment of graphene quantum dot, (d) weighing the porous graphene to 0.2-0.8 mg/ml graphene dispersion solution, solvent is water, acetone or dimethyl sulfoxide, ultrasonic stirring 80-100 ml graphene dispersing solution, adding silicon dioxide coated silver-graphite alkene quantum point, ultrasonic stirring for 10-30 minutes, transferring into a reaction kettle polyfluortetraethylene, heat preservation at 80-120 degrees C for 15-30 minute, cooling, centrifuging, washing and drying.