Production process of graphene oxide

Production process of graphene oxide

  • CN 106,587,045 B
  • Filed: 01/23/2017
  • Issued: 08/17/2021
  • Est. Priority Date: 01/23/2017
  • Status: Active Grant
First Claim
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1. A production process of graphene oxide comprises the following steps:

  • a) adding 5-44% hydrogen peroxide into the surfactant according to the mass volume ratio of 1g to 45-55ml, stirring for dissolving, and then adding the carbon material and stirring uniformly;

    b) placing the mixed solution in the step a) under the ultraviolet irradiation condition, introducing ozone and carrying out ultrasonic oscillation treatment for 0.5-10 h;

    the ozone is introduced into the reactor in the step b) with the concentration of 50-500ppm, ultrasonic oscillation treatment with the frequency of 40-150KHz is adopted for 2-3h, and the ultraviolet wavelength is 180-300 nm;

    c) adding sulfuric acid into the reaction solution to adjust the pH value to 2-5, slowly adding a ferrous reagent, stirring and dissolving, and then stirring and reacting for 0.5-5h at the temperature of 60-90 ℃

    to obtain a reaction mixed solution;

    d) carrying out suction filtration on the reaction mixed liquid, washing the filtered filter residue to be neutral, adding pure water for ultrasonic stripping, and carrying out vacuum drying to obtain graphene oxide;

    the carbon material is one of natural crystalline flake graphite, intercalated graphite, expandable graphite and expanded graphite;

    the mass ratio of the surfactant to the carbon-based material to the ferrous reagent is 1;

    2-3;

    1-3.

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