Method for preparing graphene efficiently

A graphene and high-efficiency technology, applied in the field of graphene, can solve the problems of low efficiency, pollute the environment, and high cost, and achieve the effects of wide sources, low environmental pollution, and high production efficiency

Inactive Publication Date: 2013-04-24
HUAQIAO UNIVERSITY +1
6 Cites 27 Cited by

AI-Extracted Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a method for preparing graphene with high efficiency, a large a...
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Abstract

The invention discloses a method for preparing graphene efficiently. The method comprises the following steps: (1) respectively weighing soluble inorganic salt and/or soluble organic matter and expanded graphite for later use according to the mass ratio of the soluble inorganic salt and/or the soluble organic matter to the expanded graphite of 10:1 to 200:1, wherein the expanded graphite serves as a raw material; (2) adding the soluble inorganic salt and/or the soluble organic matter and the expanded graphite into distilled water, heating, mixing uniformly until the soluble inorganic salt and/or the soluble organic matter are dissolved completely, placing into a drying box until the water is volatilized completely to obtain the mixture of the expanded graphite and the inorganic salt and/or the organic matter, placing the mixture into a ball-milling tank and performing ball milling; and (3) separating ball-milling products, washing with distilled water for 3 to 5 times, performing suction filtration and drying to obtain the graphene. The graphene is prepared according to the physical method. The method is simple and practical, has no specific requirement on equipment, is low in cost, high in efficiency, pollution-free and easy to popularize and use, and solves the problems of high cost, low efficiency, low quality and the like in the conventional preparation technology for the graphene.

Application Domain

Graphene

Technology Topic

Cvd grapheneChemistry +8

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  • Method for preparing graphene efficiently

Examples

  • Experimental program(13)

Example Embodiment

[0033] Example 1:
[0034] A method for efficiently preparing graphene is achieved through the following steps:
[0035] (1) Weigh 4g of expanded graphite and 40g of potassium nitrate. The mass ratio of potassium nitrate to expanded graphite is 10:1;
[0036] (2) Add potassium nitrate and expanded graphite into a beaker filled with 80 mL of distilled water and heat and mix until all potassium nitrate is dissolved, then place the beaker in a drying box until the water is completely volatilized to obtain a mixture of expanded graphite and potassium nitrate, and then Put the mixture of expanded graphite and potassium nitrate into a ball milling tank with a volume of 1000 mL, and add zirconium balls according to a ball-to-material mass ratio of 25:1;
[0037] (3) Then install the ball milling tank on the agitating ball mill, ball milling at 70 rpm for 2 hours, and pour the ball mill product and zirconium balls from the ball milling tank;
[0038] (4) Wash the ball milled product and zirconium balls poured out in step (3) with distilled water, sieving, and separate the ball milled product from the zirconium ball to obtain the ball milled product. Add 1500 mL of distilled water to the ball milled product and stir, vacuum filter, and then Add 500 mL of distilled water at about 70°C for washing, vacuum filtration, and repeat the process twice; finally, the product after suction filtration is dried in an electric heating blast drying box at 100°C for 12 hours to obtain graphene.

Example Embodiment

[0039] Example 2:
[0040] A method for efficiently preparing graphene is achieved through the following steps:
[0041] (1) Weigh 2g of expanded graphite and 40g of potassium chloride. The mass ratio of potassium chloride to expanded graphite is 20:1;
[0042] (2) Add potassium chloride and expanded graphite into a beaker filled with 100 mL of distilled water, heat and mix until all potassium chloride is dissolved, and then place the beaker in a drying box until all the water volatilizes to obtain a mixture of expanded graphite and potassium chloride Then put the mixture of expanded graphite and potassium chloride into a ball mill tank with a volume of 1000 mL, and add zirconium balls according to a ball-to-material mass ratio of 25:1;
[0043] (3) Then install the ball milling tank on the agitating ball mill, ball milling at a speed of 70 rpm for 3 hours, and pour the ball mill products and zirconium balls from the ball milling tank;
[0044] (4) Wash the ball milled product and zirconium balls poured out in step (3) with distilled water, sieving, and separate the ball milled product from the zirconium ball to obtain the ball milled product. Add 1500 mL of distilled water to the ball milled product and stir, vacuum filter, and then Add 500 mL of distilled water at about 90°C for washing, vacuum filtration, and repeat this process twice; finally, the product after the filtration is dried in an electric heated blast drying box at 100°C for 12 hours to obtain graphene.

Example Embodiment

[0045] Example 3:
[0046] A method for efficiently preparing graphene is achieved through the following steps:
[0047] (1) Weigh 1.5g of expanded graphite and 45g of sodium sulfate. The mass ratio of sodium sulfate to expanded graphite is 30:1;
[0048] (2) Add sodium sulfate and expanded graphite into a beaker filled with 120mL of distilled water and heat and mix until the sodium sulfate is completely dissolved, then place the beaker in a drying box until all the water volatilizes to obtain a mixture of expanded graphite and sodium sulfate, and then Put the mixture of expanded graphite and sodium sulfate into a ball milling tank with a volume of 1000 mL, and add zirconium balls according to a ball mass ratio of 50:1;
[0049] (3) Then install the ball milling tank on the agitating ball mill, ball milling at 70 rpm for 8 hours, and pour the ball mill product and zirconium balls from the ball milling tank;
[0050] (4) Wash the ball milled product and zirconium balls poured out in step (3) with distilled water, sieving, and separate the ball milled product from the zirconium ball to obtain the ball milled product. Add 1500 mL of distilled water to the ball milled product and stir, vacuum filter, and then Add 500 mL of distilled water at about 90°C for washing, vacuum filtration, and repeat the process twice; finally, the product after the filtration is dried in an electric heating blast drying box at 100°C for 12 hours to obtain graphene.

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