▎ 摘　　要

NOVELTY - Preparing graphene and nano silver composite antibacterial material comprises e.g. oxidizing and stripping graphene in graphite, adding sulfuric acid solution, sodium nitrate to flask A, uniformly stirring, introducing graphite, adding potassium permanganate, adding deionized water, placing flask A on heater, adding hydrogen peroxide solution, stirring until mixed solution C is golden yellow, washing and filtering generated solid particles, choosing another flask B, placing graphene oxide into flask B, ultrasonically peeling graphite oxide, adding silver nitrate solution to mixed solution D and continuing ultrasonic vibration, magnetically stirring, adding sodium hydroxide solution, centrifuging mixed solution E by centrifuge, using distilled water to wash black solid A until the liquid under washing becomes neutral to obtain black solid B, centrifuging black solid B, drying, and grounding to obtain graphene and nano-silver composite antibacterial material. USE - The method is useful for preparing graphene and nano silver composite antibacterial material. ADVANTAGE - This method: has short response time, which avoids generation of harmful gas chlorine dioxide (CIO2), and high safety performance; and is beneficial to universal use. DETAILED DESCRIPTION - Preparing graphene and nano silver composite antibacterial material comprises (i) oxidizing and stripping graphene in graphite, choosing flask A, adding sulfuric acid solution to flask A, adding specific amount of sodium nitrate to flask A, and uniformly stirring by stirring rod to obtain mixed solution A, (ii) introducing graphite during the stirring of the mixed liquid A, and adding specific amount of potassium permanganate to obtain mixed liquid B, (iii) adding deionized water to mixed solution B, continuing to stir, then placing flask A on heater to heat the solution inside the flask A to 100 degrees C to obtain mixed solution C, (iv) adding 30% hydrogen peroxide solution to mixed solution C, stirring it until mixed solution C is golden yellow, washing and filtering generated solid particles to obtain graphene oxide, (v) choosing another flask B, placing graphene oxide into flask B, ultrasonically peeling graphite oxide in distilled water for 1 hour until the solution becomes dark brown to obtain mixed solution D, (vi) adding silver nitrate solution to mixed solution D and continuing ultrasonic vibration for 40 minutes, magnetically stirring while heating the mixed solution D, adding sodium hydroxide solution until the solution becomes black to obtain mixed solution E, (vii) centrifuging mixed solution E by centrifuge to separate the liquid from the solid to obtain black solid A, (viii) using distilled water to wash black solid A until the liquid under washing becomes neutral to obtain black solid B, (ix) centrifuging black solid B, drying, and grounding to obtain graphene and nano-silver composite antibacterial material.