Preparation method of flawless graphene
A graphene, defect-free technology, applied in the field of preparation of defect-free graphene, can solve the problems affecting the mechanical properties, electrical conductivity and thermal properties of graphene, reduce the theoretical performance of graphene, reduce the performance of samples, etc., and achieve low production cost , Complete lattice structure and small size effect
Active Publication Date: 2018-10-02
ZHENGZHOU UNIV
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Abstract
The invention belongs to the field of graphene preparation and discloses a preparation method of flawless graphene. The preparation method includes the steps of S1, dispersing graphite powder into a mixed solvent formed by ethanol and 30wt% hydrogen peroxide according to the volume ratio of (1-9):(1-9), adding polyvinyl pyrrolidone, and performing ultrasonic treatment for 2-3 hours; S2, placing the solution obtained after the ultrasonic treatment in S1 into a supercritical reaction kettle, performing reaction at 40-80 DEG C and 12-20MPa for 1-3 hours, taking out the reaction solution after thereaction, and performing ultrasonic treatment on the reaction solution for 2-3 hours; S3, performing first centrifugal separation on the solution obtained after the ultrasonic treatment in S2 at 6000-8000rpm, taking the upper solution, performing second centrifugal separation on the upper solution at 15000-20000rpm, and using ethanol to centrifugally wash the product; S4, drying the product obtained in S3 to obtain the flawless graphene. The preparation method has the advantages that the graphene prepared by the method is small in size and few in layers as compared graphene prepared by otherpreparation methods, and more importantly, the graphene is complete in lattice structure and is almost flawless.
Application Domain
Single layer grapheneBulk chemical production
Technology Topic
SolventCvd graphene +6
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