Graphene preparation method by using graphene quantum point mechanical stripping

Graphene preparation method by using graphene quantum point mechanical stripping

  • CN 105,399,090 A
  • Filed: 12/22/2015
  • Published: 03/16/2016
  • Est. Priority Date: 12/22/2015
  • Status: Active Grant
First Claim
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1. utilize graphene quantum dot mechanically peel to prepare a method for Graphene, it is characterized in that, described method adopts graphene quantum dot as stripper, and overcritical ammonia, as transporting carrier, comprises the following steps:

  • A. graphene quantum dot and carbon materials are placed in autoclave, pass into ammonia gas, heating high-pressure still, after temperature reaches preset value, increase still internal pressure, keep circulating under making ammonia be in supercritical state;

    B. keep described autoclave internal pressure constant, reduce temperature make to be in supercritical state under ammonia solidification, obtain low temperature solid-state composite carbon element material, with low temperature solid-state composite carbon element material described in screw extrusion press mechanically peel, obtain the extrudate of described solid union carbon materials, wherein, the graphene quantum dot wrapped up by solid ammonia between layers of described low temperature solid-state composite carbon element material is filled;

    C. step-down is warming up to normal temperature and pressure, and described extrudate is expanded, obtains expanded product and carries out ultrasonic separation, obtains Graphene powder.

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