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Preparation method of graphene solution

A technology of graphene and solution, which is applied in the field of graphite, can solve problems such as uneven graphene solution, and achieve the effect of easy operation, simple method and reasonable process parameters

Inactive Publication Date: 2015-05-06
QINGDAO TAIHAODA CARBON MATERIAL
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Problems solved by technology

[0004] Graphene is often used as a filler for conductive nanomaterials due to its unique physical and chemical structure, which makes it have good thermal stability, light transmission, electrical conductivity and mechanical strength. Widely concerned, although many preparation methods have been studied, there are still some deficiencies and areas for improvement, such as the unevenness of the prepared graphene solution

Method used

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Embodiment

[0013] The preparation method of the graphene solution of the present embodiment comprises the following steps: (1) Take concentrated sulfuric acid with a concentration of 96% and put it into a round-bottomed flask, add natural flake graphite under stirring conditions in an ice-water bath, wait to stir evenly, divide Slowly add NaNO3 and KMnO4 in batches, continuously stir for 60min, then add dilute sulfuric acid solution with a mass fraction of 5wt%, heat to 98°C, and stir for 2 h, the concentrated sulfuric acid, graphite, NaNO3, KMnO4, dilute sulfuric acid solution The mass ratio is 35:1:0.5:2:70; (2) After the mixture is cooled to 60°C, add 30% hydrogen peroxide and stir for 2 h. Wash with ionic water, dilute to the required concentration, and peel off to obtain a graphene oxide solution; (3) Take the graphene oxide solution in a round bottom flask, add 35 wt% hydrazine hydrate and 28 wt% ammonia solution, magnetically stir, stir The speed is 500r / min, heated to 95°C for re...

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Abstract

The invention discloses a method for preparing graphene solution. The method is as below: pouring sulfuric acid into a round bottom flask, adding natural flake graphite while stirring into an ice-water bath, mixing evenly, slowly adding NaNO3 and KMnO4 by batches, continuously stirring for 60 min, adding dilute sulphuric acid solution with mass fraction of 5 wt%, heating to 98 DEG C, stirring for 2 h, cooling the mixture to 60 DEG C, adding hydrogen peroxide with concentration of 30%, stirring for 2 h, filtering, washing the product with dilute hydrochloric acid and deionized water, diluting to needed concentration and stripping to obtain a graphene oxide solution; pouring the graphene oxide solution into a round bottom flask, adding hydrazine and ammonia solution, conducting magnetic stirring at the speed of 500 r / min, heating to 95 DEG C, reducing for 1 h, and filtering and centrifuging to obtain uniformly dispersed graphene solution. The method has the advantages of simpleness, easy operation and reasonable process parameters, and the prepared graphene solution is uniformly dispersed.

Description

[0001] technical field [0002] The invention belongs to the technical field of graphite, and in particular relates to a preparation method of a graphene solution. [0003] Background technique [0004] Graphene is often used as a filler for conductive nanomaterials due to its unique physical and chemical structure, which makes it have good thermal stability, light transmission, electrical conductivity and mechanical strength. Widely concerned, although many preparation methods have been studied, there are still some deficiencies and areas for improvement, such as the unevenness of the prepared graphene solution. [0005] Contents of the invention [0006] In order to overcome the above-mentioned technical problems existing in the prior art, the object of the present invention is to provide a preparation method of graphene solution, which is simple and uniform in solution. [0007] The preparation method of the graphene solution provided by the present invention compris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04
Inventor 乔帅
Owner QINGDAO TAIHAODA CARBON MATERIAL
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