▎ 摘　　要

NOVELTY - The preparation of antibacterial material involves adding anhydrous sodium carbonate in several portions to oxidized graphene dispersion, washing, redistributing in deionized water, mixing deprotonated graphene oxide dispersion with silver nitrate solution, washing, drying solid precipitate, weighing and dispersing dried powder in ultra-deionized water, slowly stirring with the same volume of sodium borohydride aqueous solution, reducing the silver ions to nano silver to stabilize nano silver, mixing the mixed solution in ice-water mixed bath, and carrying out ultrasonic treatment. USE - Preparation of nano carbon/nano silver composite antibacterial material (claimed). ADVANTAGE - The method enables the preparation of nano carbon/nano silver composite antibacterial material by simple process and easy operations under mild reaction conditions with high productivity in environmentally-friendly, and effectively improves the antibacterial properties of graphene oxide and silver ion sustained-release properties. DETAILED DESCRIPTION - The preparation method of nano carbon/nano silver composite antibacterial material involves adding 0.01-0.05 g anhydrous sodium carbonate in several portions to 10 ml of 0.4-2 mg/ml oxidized graphene dispersion, stirring, reacting for 24 hours, washing, redistributing in deionized water, mixing deprotonated graphene oxide dispersion with 10-50 mg/ml silver nitrate solution, evenly stirring for 6 hours, washing, repeating for 3 times, freeze-drying obtained solid precipitate, accurately weighing and dispersing the freeze-dried powder in 0.1-1 mg/ml ultra-deionized water, slowly stirring with the same volume of 0.5-5 mmol/l sodium borohydride aqueous solution, reducing the silver ions to nano silver, dripping, continuously stirring for 5 hours to stabilize nano silver, mixing the mixed solution in ice-water mixed bath, and carrying out ultrasonic treatment for 3-5 hours.