▎ 摘　　要

NOVELTY - Preparing monodispersable graphene-based nano-silver complex comprises e.g. adding the graphene oxide in water, carrying out ultrasonic dispersing to obtain the graphene oxide dispersion liquid, adding concentrated ammonia solution for adjusting pH value, dissolving silver nitrate in deionized water to obtain silver nitrate solution, adding ammonia solution, precipitating, dissolving, preparing silver ammonia solution, and stirring, slowly dripping, adding sodium citrate solution, stirring, carrying out ultrasonic process using mixed solution and cooling. USE - The method is useful for preparing monodispersable graphene-based nano-silver complex (claimed). ADVANTAGE - The nano-silver complex is hydrophilic and can be stabilized in water for a month without the addition of any surfactant. DETAILED DESCRIPTION - Preparing monodispersable graphene-based nano-silver complex comprises adding the graphene oxide in water, carrying out ultrasonic dispersing for 10-60 minutes to obtain the 0.5-3 mg/ml graphene oxide dispersion liquid, adding concentrated ammonia solution for adjusting pH value to 7-9, (ii) dissolving silver nitrate in deionized water to obtain a concentration of 0.05-0.35 M of silver nitrate solution, adding 2-10 volume of ammonia solution, precipitating, dissolving, preparing silver ammonia solution, and stirring for 5-40 minutes, slowly dripping for 0.3-1.0 hours at 0-25 degrees C, (iii) adding sodium citrate solution, stirring for 3-10 minutes, (iv) carrying out ultrasonic process using mixed solution for 5-40 minutes, cooling for 1-5 minutes, (v) repeating step (iv) carrying out ultrasonic water bath treatment at 0-25 degrees C and cooling until the reaction is complete, (vi) finishing reaction, filtering, washing and drying to obtain the product.