Graphene material of ordered structure and preparing method thereof

An ordered structure, graphene technology, applied in the field of carbon materials, can solve problems such as inability to mass manufacture, inability to obtain macroscopic materials, and inaccuracy

Active Publication Date: 2017-01-11
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the rapid development of science and technology and the high-level demand for graphene materials in various industries, in order to break through practical application barriers and meet industrial needs, only relying on graphene nano-chips stacked by single-layer carbon atom planar structure graphene and It cannot effectively solve the existing technical problems, so it is required to prepare a graphene macroscopic material with manipulability
[0004] The current research is mainly aimed at how to effectively obtain self-assembled macroscopically operable graphene materials from graphene dispersions. Commonly used methods such as freeze-drying, hydrothermal method, solvent volatilization self-assembly, cross-linking assembly method, etc., these types of methods Graphene macroscopic materials can be obtained quickly and effectively, but the arrangement of graphene microsheets inside the material cannot be effectively controlled, and macroscopic materials with an ordered microstructure cannot be obtained
[0005] In the existing research, the weak magnetism of gr

Method used

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  • Graphene material of ordered structure and preparing method thereof
  • Graphene material of ordered structure and preparing method thereof
  • Graphene material of ordered structure and preparing method thereof

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preparation example Construction

[0029] The invention provides a kind of preparation method of the graphene material of ordered structure, comprises the following steps:

[0030] A) after mixing the graphene oxide solution with the electrolyte, a mixed solution is obtained;

[0031] B) after the mixed solution that above-mentioned steps is obtained is filtered, obtain mixed graphene material;

[0032] C) Freeze-drying the mixed graphene material obtained in the above steps, and then annealing the mixed graphene material obtained in the above steps under vacuum or a protective atmosphere to obtain a graphene material with an ordered structure.

[0033] In the present invention, firstly, the graphene oxide solution and the electrolyte are mixed to obtain a mixed solution.

[0034] The present invention has no special limitation on the graphene oxide solution, and the graphene oxide solution well known to those skilled in the art can be used. Those skilled in the art can select and adjust according to actual pr...

Embodiment 1

[0051] 1. Take 0.1 mg / mL graphene oxide solution, measure ammonium bicarbonate according to the mass ratio of graphene oxide and ammonium bicarbonate 1:400, add it to deionized water, stir to completely dissolve the ammonium bicarbonate, and obtain a mixed solution.

[0052] 2. Mix the solution. Pour it into a sand core suction filter device, and filter under a pressure of 0.5MPa to form a membrane.

[0053] 3. Freeze-dry the above material at -60°C for 12h to obtain a mixed graphene material of graphene oxide / ammonia bicarbonate, and then place it in a tube furnace with an argon protective atmosphere and anneal at 800°C for 10h to obtain ordered porous graphite vinyl material.

[0054] The ordered porous graphene material prepared in Example 1 of the present invention is detected, see figure 1 , figure 1 Scanning electron microscope image of the graphene material prepared for Example 1 of the present invention. Depend on figure 1 It can be seen that the graphene material...

Embodiment 2

[0056] 1. Take 1.0 mg / mL graphene oxide solution, measure potassium hydroxide according to the mass ratio of graphene oxide and potassium hydroxide 1:5, add it to deionized water, stir to completely dissolve potassium hydroxide, and obtain a mixed solution.

[0057] 2. Pour the mixed solution into a sand core suction filter device, and filter under a pressure of 0.05MPa to form a film.

[0058] 3. The above materials were freeze-dried at -10°C for 20h to obtain a graphene oxide / potassium hydroxide mixed graphene material, and then placed in a tube furnace with an argon protective atmosphere and annealed at 900°C for 1.5h to obtain an ordered porous Graphene material.

[0059] The ordered porous graphene material prepared in Example 2 of the present invention is detected, see figure 2 , figure 2 Scanning electron microscope image of the graphene material prepared for Example 2 of the present invention.

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Abstract

The invention provides a preparing method of a graphene material of an ordered structure. The preparing method includes the following steps that an oxidized graphene solution and an electrolyte water solution are mixed to obtain a mixed solution; the mixed solution obtained in the previous step is filtered to obtain the mixed graphene material under the action of an outside pressure field; the mixed graphene material obtained in the previous steps is freeze-dried, and in vacuum or under the protective atmosphere, the mixed graphene material obtained in the previous steps is annealed to obtain the graphene material of the ordered structure. By adopting electrolyte, the graphene structure is ordered and controllable on the basis of preparing the graphene macroscopic material; as the filtering mode is used, the arranging mode of graphene microchips can be adjusted. The arranging mode of graphene microchips in the assembling process can be effectively controlled to prepare the graphene macroscopic material in an adjusting mode, and the graphene macroscopic material of the ordered microstructure is obtained.

Description

technical field [0001] The invention belongs to the technical field of carbon materials, in particular to a graphene material with an ordered structure and a preparation method thereof. Background technique [0002] Graphene is a two-dimensional crystal composed of carbon atoms with only one layer of atomic thickness. It is also the thinnest material and the strongest material currently in the application field. Excellent elasticity, the stretching range can reach 20% of its own size; it also has a huge theoretical specific surface area, stable physical and chemical properties, and excellent electrical conductivity. It is precisely because graphene materials have many excellent physical and chemical properties that they are widely used in energy storage materials, environmental engineering, and high-sensitivity pressure sensing. However, the applications in existing fields are still concentrated on graphene nanochips. . [0003] With the rapid development of science and te...

Claims

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Application Information

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IPC IPC(8): C01B32/184
CPCC01P2004/03
Inventor 邓伟周旭峰刘兆平
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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