Preparation method for graphene
A graphene and graphite technology, applied in the graphene field, can solve the problems of high energy consumption, small size of graphene, and limited application prospects, and achieve the effects of low energy consumption, mild conditions, and simple reaction devices
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Embodiment 1
[0024] 1) Weigh 200 mg of graphite raw material into a round-bottomed flask, add 60 mL of pre-configured choline chloride / urea eutectic ionic liquid, and sonicate for 30 min to obtain a graphite solvent dispersion.
[0025] 2) The dispersion obtained in step 1) was transferred to an oil bath, stirred at 100° C. for 24 hours, and then cooled to room temperature.
[0026] 3) The black emulsion obtained in step 2 is repeatedly washed with water and ethanol for 2-3 times, then washed once with dichloromethane, and then dried in a blast drying oven to obtain black powder.
[0027] 4) Disperse the obtained black powder in ethanol, ultrasonicate for 30 min, and centrifuge at 2000 rpm for 30 min to take the supernatant to obtain the target graphene nanosheet.
[0028] figure 1 The scanning electron microscope photo of graphene obtained in this example is shown in figure 1 , figure 2 The atomic force microscope AFM image of graphene obtained in this example is shown in figure 2 ,...
Embodiment 2
[0030] 1) Weigh 100 mg of graphite raw material into a round-bottomed flask, add 30 mL of pre-configured choline chloride / urea eutectic ionic liquid, and sonicate for 30 min to obtain a graphite solvent dispersion.
[0031] 2) The dispersion obtained in step 1) was transferred to an oil bath, stirred at 80° C. for 8 hours, and then cooled to room temperature.
[0032] 3) The black emulsion obtained in step 2 is repeatedly washed with water and ethanol for 2-3 times, then washed once with dichloromethane, and then dried in a blast drying oven to obtain black powder.
[0033] 4) Disperse the obtained black powder in ethanol, ultrasonicate for 30 min, and centrifuge at 2000 rpm for 30 min to take the supernatant to obtain the target graphene nanosheet.
Embodiment 3
[0035] 1) Weigh 100 mg of graphite raw material into a round-bottomed flask, add 30 mL of pre-configured choline chloride / urea eutectic ionic liquid, and sonicate for 30 min to obtain a graphite solvent dispersion.
[0036] 2) The dispersion obtained in step 1) was transferred to an oil bath, stirred at 80° C. for 24 hours, and then cooled to room temperature.
[0037] 3) The black emulsion obtained in step 2 is repeatedly washed with water and ethanol for 2-3 times, then washed once with dichloromethane, and then dried in a blast drying oven to obtain black powder.
[0038] 4) Disperse the obtained black powder in ethanol, ultrasonicate for 30 min, and centrifuge at 2000 rpm for 30 min to take the supernatant to obtain the target graphene nanosheet.
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