In order to determine the graphene sample definitively,a comprehensive determination method for graphene was proposed.Graphene prepared by physical and chemical methods on the market were selected to be analyzed by Raman spectroscopy,SEM,XPS,XRD and TEM analysis to determine whether they were graphene.Graphene prepared by physical and chemical methods from two man-ufacturers were selected as typical samples,and graphite powder and graphene oxide were selected as comparison samples to validate the proposed graphene determination method.The results show that,(1)the determination method can make a clear determination of graphene prepared by physical and chemical methods,because it is carried out through a variety of determination means to confirm and supplement each other,breaking the uncertainty that is common in a single determination method;(2)according to the determination method,samples G1～G4 were determined to be graphene,and sample G1 was determined to be not graphene;(3)the actual judgment result of sample G1 was inconsistent with the description given by the merchant,which further illustrates the current situation of the graphene market in urgent need of purification.
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