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Preparation method of graphene

A graphene and graphene dispersion technology, applied in the field of materials, can solve the problems of large-scale preparation limitations, achieve the effects of reducing production costs, mild reaction conditions, and good large-scale industrial applications

Active Publication Date: 2014-02-12
安徽百特新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method belongs to the bottom-up method, and its large-scale preparation is subject to certain restrictions.

Method used

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  • Preparation method of graphene
  • Preparation method of graphene

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Slowly add 1g of potassium permanganate to 100ml of concentrated sulfuric acid to form an acidic solution. Add 1 g of graphite raw material into the acidic solution, stir at 30° C. for 2 h, filter the obtained mixed solution, wash with water, and dry at 50° C. for 10 h to obtain acid-treated raw graphite.

[0030] (2) Add 5g of sodium hydroxide to 100ml of water to form an active substance solution. Then, the raw graphite obtained by the acid treatment is added into the active substance solution to obtain the active substance solution of the raw graphite.

[0031] (3) The active material solution of raw graphite was ultrasonically treated by a 500 W, 20 kHz probe at 20 °C for 2 h to obtain the active material solution of graphene.

[0032] (4) The graphene active substance solution obtained in step (3) is filtered, washed with water, and then dried at 50° C. for 10 hours to obtain graphene powder.

[0033] The graphene prepared by the above method is dispersed in ...

Embodiment 2

[0035] (1) Slowly add 1g of potassium permanganate to 10ml of concentrated sulfuric acid to form an acidic solution. Add 1 g of graphite raw material into the acidic solution, stir at 30° C. for 2 h, filter the obtained mixed solution, wash with water, and dry at 50° C. for 10 h to obtain acid-treated raw graphite.

[0036] (2) Add 5g of sodium hydroxide to 100ml of water to form an active substance solution. Then, the raw graphite obtained by the acid treatment is added into the active substance solution to obtain the active substance solution of the raw graphite.

[0037] (3) The active material solution of raw graphite was ultrasonically treated by a 500 W, 20 kHz probe at 20 °C for 2 h to obtain the active material solution of graphene.

[0038] (4) The graphene active substance solution obtained in step (3) is filtered, washed with water, and then dried at 50° C. for 10 hours to obtain graphene powder.

[0039] The graphene prepared by the above method is dispersed in N...

Embodiment 3

[0041] (1) Slowly add 1g of potassium permanganate to 100ml of concentrated sulfuric acid to form an acidic solution. Add 1 g of graphite raw material into the acidic solution, stir at 30° C. for 2 h, filter the obtained mixed solution, wash with water, and dry at 50° C. for 10 h to obtain acid-treated raw graphite.

[0042] (2) Add 1g of sodium hydroxide to 20ml of water to form an active substance solution. Then, the raw graphite obtained by the acid treatment is added into the active substance solution to obtain the active substance solution of the raw graphite.

[0043] (3) The active material solution of raw graphite was ultrasonically treated by a 500 W, 20 kHz probe at 20 °C for 2 h to obtain the active material solution of graphene.

[0044] (4) The graphene active substance solution obtained in step (3) is filtered, washed with water, and then dried at 50° C. for 10 hours to obtain graphene powder.

[0045] The graphene prepared by the above method is dispersed in N...

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Abstract

The invention belongs to the technical field of materials, in particular relates to a preparation method of graphene and particularly relates to a method of preparing graphene by virtue of assistance of ultrasonic waves. The preparation method is mainly used for preparing graphite with high quality, large yield and low cost and is characterized by comprising the following steps: treating a graphite raw material by virtue of an acid solution firstly, then adding the graphite raw material after acid treatment into an active matter solution, carrying out ultrasonic treatment on a mixture to obtain a graphene dispersion liquid, and then carrying out drying treatment on the graphene dispersion liquid to obtain a graphene powder. By adopting the preparation method, the graphene prepared by virtue of the method has an integral structure, little defects and larger size and is stable in the performance; in addition, the experimental process is simple and effective and can be used for large-scale industrial production; the self properties such as thermal property, the electric property and mechanical property of the graphene are better preserved; as the reaction condition is mild, high-temperature and high-pressure reaction is not related, the procedure is simple, and the production cost is low; the method has better potential in large-scale industrial application.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a method for preparing graphene, especially a method for preparing graphene assisted by ultrasound, which is mainly used for the preparation of high-quality, large-yield, and low-cost graphite. Background technique [0002] Graphene, as a carbon material that has been widely concerned at present, is the thinnest two-dimensional material discovered by human beings. Its microstructure is composed of carbon atoms connected by sp2 hybridization. Because graphene itself has a stable conjugated electron system, it can exhibit many excellent physical properties. For example: the strength of graphene is more than 100 times that of steel, reaching 130 GPa, which is the strongest material obtained so far; the thermal conductivity of graphene is 5×103 Wm-1K-1, which is 3 times that of diamond; graphene Has the highest known carrier mobility, 1.5 × 104 cm2V-1S-1;. In addition...

Claims

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Application Information

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IPC IPC(8): C01B31/04C01B32/19
Inventor 卢红斌董雷
Owner 安徽百特新材料科技有限公司
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