▎ 摘　　要

NOVELTY - Graphene oxide is prepared using improved Hummers method. Graphene oxide is dissolved in aqueous solution to obtain graphene oxide solution. 1.6-3.2 %mass Sodium borohydride solution is added to graphene oxide solution, and graphene oxide solution is reduced. The graphene oxide solution is washed with deionized water, centrifuged, reduced graphene oxide solution is dispersed, 20.4-40.8 %mass chloroauric acid solution is added, and ultrasonic processing is carried out. The resulting solution is washed, and centrifuged to obtain gold nanoparticles-graphene composite material. USE - Preparation of gold nanoparticle-graphene composite material used in catalysis, sensing, and surface-enhanced Raman scattering applications. ADVANTAGE - The method provides gold nanoparticle-graphene composite material having excellent stability in aqueous solution, biocompatibility, and electroconductivity, and large surface area, within a short period of time, by environmentally-friendly and simple process. DETAILED DESCRIPTION - Graphene oxide is prepared using improved Hummers method. Graphene oxide is dissolved in aqueous solution, and ultrasonic processing is carried out to obtain 0.5-1 mg/ml graphene oxide solution. 1.6-3.2 %mass Sodium borohydride solution is added to graphene oxide solution, heated in water bath at 70-80 degrees C for 2-4 hours and graphene oxide solution is reduced. The graphene oxide solution is washed 2-3 times with deionized water, centrifuged, and impurities are removed. 0.1-0.3 mg/ml Reduced graphene oxide solution is dispersed, 20.4-40.8 %mass chloroauric acid solution is added, and ultrasonic processing is carried out at room temperature for 10-20 minutes. The resulting solution is washed 2-3 times with deionized water, and centrifuged to obtain gold nanoparticles-graphene composite material.