Method for preparing graphene
A graphene, graphene solution technology, applied in graphene, chemical instruments and methods, inorganic chemistry and other directions, can solve the problems of long time, difficult removal, complicated equipment, etc., to achieve efficient removal, good dispersion uniformity, and improved reduction. degree of effect
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Embodiment 1
[0091] Dissolve 1 g of graphene oxide and 20 g of ascorbic acid in 1000 mL of pure water, and stir ultrasonically for 2 hours to form a solution with electrolyte ascorbic acid and graphene oxide concentration of 1 mg / mL.
[0092] The above solution was left to react at 15° C. for 24 hours to obtain a chemically reduced graphene solution.
[0093] Put the above solution in an electrolytic cell, insert electrodes, and under the condition of standing at 15°C, adopt a constant potential electrochemical method, apply a constant voltage of 10 V, and perform electrochemical reduction for 6 hours to obtain a graphene solution after electrochemical reduction .
[0094] Add 500 mL of 30% hydrogen peroxide solution to the above solution, stir and react at 15 °C at a speed of 100 r / min for 5 minutes, and then let it stand for 24 hours to obtain a uniformly dispersed graphene solution.
[0095] Use a 350-mesh filter to filter the above solution to obtain a black viscous sample.
[0096] ...
Embodiment 2
[0100] Dissolve 1 g of graphene oxide and 20 g of ascorbic acid in 1000 mL of pure water, and stir ultrasonically for 2 hours to form a solution with electrolyte ascorbic acid and graphene oxide concentration of 1 mg / mL.
[0101] The above solution was left to react at 5° C. for 48 hours to obtain a chemically reduced graphene solution.
[0102] Put the above solution in an electrolytic cell, insert electrodes, and under the condition of standing at 15°C, adopt a constant potential electrochemical method, apply a constant voltage of 10 V, and perform electrochemical reduction for 3 hours to obtain a graphene solution after electrochemical reduction .
[0103] Add 500 mL of 30% hydrogen peroxide solution to the above solution, stir and react at 20 °C for 5 minutes at a speed of 100 r / min, and then let it stand for 24 hours to obtain a uniformly dispersed graphene solution.
[0104] Use a 400-mesh filter to filter the above solution to obtain a black viscous sample.
[0105] A...
Embodiment 3
[0109] Dissolve 1 g of graphene oxide and 20 g of ascorbic acid in 1000 mL of pure water, and stir ultrasonically for 2 hours to form a solution with electrolyte ascorbic acid and graphene oxide concentration of 1 mg / mL.
[0110] The above solution was left to react at 15° C. for 24 hours to obtain a chemically reduced graphene solution.
[0111] Put the above solution in an electrolytic cell, insert electrodes, and under the condition of standing at 15°C, adopt a constant potential electrochemical method, apply a constant voltage of 15V, and perform electrochemical reduction for 1 hour to obtain a graphene solution after electrochemical reduction.
[0112] Add 500 mL of 30% hydrogen peroxide solution to the above solution, stir and react at 20 °C for 5 minutes at a speed of 100 r / min, and then let it stand for 24 hours to obtain a uniformly dispersed graphene solution.
[0113] Use a 300-mesh filter to filter the above solution to obtain a black viscous sample.
[0114] Add ...
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