A kind of preparation method of water-soluble graphene material
A graphene and water-soluble technology, applied in the field of preparation of water-soluble graphene materials, can solve the problems of poor water dispersibility of products, prone to danger, low safety factor, etc., and achieves superior quality, simple and safe preparation method, and water dispersion. good performance
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Embodiment 1
[0025] A kind of preparation method of water-soluble graphene material, take natural graphite powder as raw material, potassium permanganate and citric acid as exfoliation reagent, comprise the steps:
[0026] (1) Accurately weigh 70 mg of natural graphite powder, 350 mg of potassium permanganate and 700 mg of citric acid, add them to a 5 ml ball mill jar, and mill for 30 minutes to obtain a purple mixture;
[0027] (2) Transfer the purple mixture obtained in step (1) to a crucible, heat-treat at 100° C. for 30 min, and cool to room temperature to obtain a crude water-soluble graphene material;
[0028] (3) Transfer the mixture in the crucible of step (2) to a glass beaker, add 50ml of boiling deionized water, stir magnetically for 5min, and ultrasonically treat for 20min, centrifuge at high speed to obtain a solid, repeat this process until the clear liquid after centrifugation The color is transparent, and the residual potassium permanganate and citric acid are washed away; ...
Embodiment 2
[0035] A kind of preparation method of water-soluble graphene material, take natural graphite powder as raw material, potassium permanganate and citric acid as exfoliation reagent, comprise the steps:
[0036] (1) Accurately weigh 50 mg of natural graphite powder, 250 mg of potassium permanganate and 500 mg of citric acid, add them to a 5 ml ball mill jar, and mill for 30 minutes to obtain a purple mixture;
[0037] (2) Transfer the purple mixture obtained in step (1) to a crucible, heat-treat at 120° C. for 30 minutes, and cool to room temperature to obtain a crude water-soluble graphene material;
[0038] (3) Transfer the mixture in the crucible in step (2) to a glass beaker, add 50ml of boiling deionized water, stir magnetically for 5min, and ultrasonically treat for 40min, centrifuge at high speed to obtain a solid, repeat this process until the clear liquid after centrifugation The color is transparent, and the residual potassium permanganate and citric acid are washed aw...
Embodiment 3
[0045] A kind of preparation method of water-soluble graphene material, take natural graphite powder as raw material, potassium permanganate and citric acid as exfoliation reagent, comprise the steps:
[0046] (1) Accurately weigh 100 mg of natural graphite powder, 500 mg of potassium permanganate and 1000 mg of citric acid, add them to a 10 ml ball mill jar, and mill for 60 minutes to obtain a purple mixture;
[0047] (2) Transfer the purple mixture obtained in step (1) to a crucible, heat-treat at 150° C. for 60 min, and cool to room temperature to obtain a crude water-soluble graphene material;
[0048] (3) Transfer the mixture in the crucible of step (2) to a glass beaker, add 50ml of boiling deionized water, stir magnetically for 10min, ultrasonicate for 20min, centrifuge at high speed to obtain a solid, repeat this process until the clear liquid after centrifugation The color is transparent, and the residual potassium permanganate and citric acid are washed away;
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