▎ 摘　　要

NOVELTY - The preparation method of graphene involves using the raw materials for the production of synthetic diamond waste, where the waste after the production of the artificial diamond includes graphite-stripped scrap and non-stripped waste of graphite. The weight of graphite which is peeled off is not less than 10 wt.% of the waste after the production of the synthetic diamond. USE - Preparation of graphene from artificial diamond waste. ADVANTAGE - The prepared graphene composite material has high hardness, excellent wear resistance property, solves the problems of graphene and metal organic combination, promotes the development of olefins. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the method for preparing graphene composite material by using artificial diamond waste, which involves adding certain weight of graphene into the deionized water, ultrasonically oscillating and dispersing for 30 minutes, pumping into saturated tin chloride solution for 40-60 minutes, ultrasonically oscillating, pumping into palladium chloride solution for 40-60 minutes, ultrasonically oscillating, filtering, washing with deionized water to neutral, vacuum-drying, weighing a certain amount of nickel-containing soluble compounds, mixing ammonium chloride and sodium citrate, adding deionized water preparation solution, adjusting the pH of ammonia to 10, adding the graphene to the mixed solution, ultrasonically dispersing for 30 minutes, adding 5% aqueous sodium hypophosphite solution, adjusting the pH of the solution to 10, stirring at 60 degrees C for 60 minutes, completing the reaction, washing and drying.