Preparation method of porous folded graphene with high specific surface area
A high specific surface area, graphene technology, applied in the chemical industry, can solve the problems of low specific surface area and loss of wrinkled structure of porous wrinkled graphene, and achieve the effect of facilitating ultrasonic atomization treatment
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[0018] Example 1
[0019] Take 400ml of 1mg / ml graphene oxide solution, first add 30ml of 25% by weight ammonia water, react at 30℃ for 5h, add sodium hydroxide, the mass ratio of sodium hydroxide to graphene oxide is 2:1, and mix well , Ultrasonic atomization treatment, the drying temperature is 500 ℃, the collected samples are heat treated at 800 ℃ under nitrogen protection for 1 hour, and washed to neutrality. Finally, porous wrinkled graphene is obtained with a specific surface area of 1100m 2 / g. Porous wrinkled graphene looks like figure 1 Shown.
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[0020] Example 2
[0021] Take 200ml of 3mg / ml graphene oxide solution, first add 6g of anhydrous ethylenediamine, react at 80℃ for 12h, add potassium hydroxide, the mass ratio of potassium hydroxide to graphene oxide is 4:1, mix well, ultrasonic mist For chemical treatment, the drying temperature is 300°C, and the collected samples are heat treated at 700°C for 2 hours under nitrogen protection, and washed to neutrality. Finally, porous wrinkled graphene is obtained with a specific surface area of 1636m 2 / g. Porous wrinkled graphene looks like figure 2 Shown.
Example Embodiment
[0022] Example 3
[0023] Take 300ml of 2mg / ml graphene oxide solution, first add 30g of tetraethylenepentamine, react at 100°C for 20h, add potassium carbonate, the mass ratio of potassium carbonate to graphene oxide is 3:1, mix well, ultrasonic atomization treatment, The drying temperature is 600°C, and the collected samples are heat treated at 1000°C for 2 hours under nitrogen protection, and washed to neutrality. Finally, porous wrinkled graphene is obtained with a specific surface area of 1218m 2 / g. Porous wrinkled graphene looks like image 3 Shown.
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