▎ 摘　　要

NOVELTY - Preparing graphene composite material involves adding graphene oxide into deionized water, ultrasonically dispersing for 1-2 hours to obtain oxidized graphene suspension, mixing graphene oxide suspension with prepared silver ammonia solution in ratio 5:1, and stirring for 30-60 minutes. The organic reducing agent is added, and pH is adjusted 10-12. The mixture is stirred at 80-90 degrees C in water bath for 2-3 hours, and subjected to magnetic force at 45-60 degrees C. The mixture is cooled, filtered, washed with ethanol and de-ionized water for 3-5 times. USE - Method for preparing graphene composite material (claimed). ADVANTAGE - The method enables to prepare graphene composite material that has good Raman enhancement effect, and in simple manner. DETAILED DESCRIPTION - Preparing graphene composite material involves adding graphene oxide into deionized water, ultrasonically dispersing for 1-2 hours to obtain oxidized graphene suspension, mixing graphene oxide suspension with prepared silver ammonia solution in ratio 5:1, and stirring for 30-60 minutes. The organic reducing agent is added, and pH is adjusted 10-12. The mixture is stirred at 80-90 degrees C in water bath for 2-3 hours, and subjected to magnetic force at 45-60 degrees C. The mixture is cooled, filtered, washed with ethanol and de-ionized water for 3-5 times, dried at 40-60 degrees C for 10-12 hours to obtain silver-graphite composite material.