Preparation method of size controllable grapheme
A graphene and dimension technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problem that the electrical conductivity cannot be greatly improved, and achieve the effects of easy operation, low cost, and high yield
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[0056] Example 1
[0057] A preparation method of size-controllable graphene, the steps are as follows:
[0058] (1) Add 50ml of concentrated nitric acid to the mixed solution of 5g of flake graphite and 150ml of concentrated sulfuric acid, stir at room temperature for 24h, rinse with deionized water 3 times, and dry at 60°C to obtain graphite interlayer compounds;
[0059] (2), rapidly expand the graphite intercalation compound obtained above at 1050°C for 30s to obtain expanded graphite;
[0060] (3) Slowly add 3g potassium permanganate to the mixture of 0.3g obtained expanded graphite and 60ml concentrated sulfuric acid, stir at 60°C for 24h, add 60ml deionized water and 15ml peroxide under ice bath conditions hydrogen, and the mixture was washed to neutrality to obtain graphene oxide;
[0061] (4), the graphene oxide of above-mentioned gained is dispersed in water, and graphene oxide is separated by centrifugal method;
[0062] 1. Centrifuge with rotating speed and...
Example Embodiment
[0076] Example 2
[0077] A preparation method of size-controllable graphene, the steps are as follows:
[0078] (1) Add 50ml of concentrated nitric acid to the mixed solution of 5g of flake graphite and 150ml of concentrated sulfuric acid, stir at room temperature for 24h, rinse with deionized water 3 times, and dry at 60°C to obtain graphite interlayer compounds;
[0079] (2) The graphite interlayer compound is rapidly expanded at 1050°C for 30s to obtain expanded graphite;
[0080] (3) Slowly add 3g potassium permanganate to the mixture of 0.3g expanded graphite and 60ml concentrated sulfuric acid, stir at 60°C for 24h, add 60ml deionized water and 15ml hydrogen peroxide under ice bath conditions, and mix The mixture is washed to neutrality to obtain graphene oxide;
[0081] (4), disperse graphene oxide in water, and separate graphene oxide by centrifugal method;
[0082] 1. Centrifuge with rotating speed and time of 8000 rmp and 40 min respectively to obtain super...
Example Embodiment
[0087] Example 3
[0088] A preparation method of size-controllable graphene, the steps are as follows:
[0089] (1) Add 50ml of concentrated nitric acid to the mixed solution of 5g of flake graphite and 150ml of concentrated sulfuric acid, stir at room temperature for 24h, rinse with deionized water 3 times, and dry at 60°C to obtain graphite interlayer compounds;
[0090] (2) The graphite interlayer compound is rapidly expanded at 1050°C for 30s to obtain expanded graphite;
[0091] (3) Slowly add 3g potassium permanganate to the mixture of 0.3g expanded graphite and 60ml concentrated sulfuric acid, stir at 60°C for 24h, add 60ml deionized water and 15ml hydrogen peroxide under ice bath conditions, and mix The mixture is washed to neutrality to obtain graphene oxide;
[0092] (4), disperse graphene oxide in water, and separate graphene oxide by centrifugal method;
[0093] 1. Centrifuge with rotating speed and time of 8000 rmp and 40 min respectively to obtain super...
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