Freeze-drying mechanism for cavernous graphene with freeze-drying technology!
Includes: 1, in 15
Adding natural graphite within 60 min in ice bath ultrasonic thick - H2SO4, after adding NaNO3, then in 15
Adding potassium permanganate KMnO4 within 60 minutes, after waiting for potassium permanganate to join all start timing, 0.
1 h, get mixture;
2, at 30 - the mixture
35 ℃ water bath stirring reaction in 0.
5 h, adding deionized water mixture, the heat to 95 -
20-100 ℃, stirring reaction
30 min, then add in deionized water, hydrogen peroxide, and then separation, washing, vacuum freeze drying, the lyophilizer low-pressure hot strip, a quick sponge graphene.
the method to optimize the preparation of graphene, preparation period is short, high efficiency, simple process, easy operation, no pollution and energy saving to the environment, can be applied.