Preparation method of three-dimensional-structure graphene/carbon nanotube hybrid carbon material

A technology of carbon nanotubes and three-dimensional structures, applied in the direction of carbon nanotubes, graphene, nanocarbon, etc., can solve problems such as large contact resistance and limited application fields, and achieve reduced junction resistance, no environmental pollution, and low cost Effect

Active Publication Date: 2017-05-10
JIANGHAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above method requires graphene and carbon nanotubes to be synthesized separately, and then assembled to form a three-dimensional structure. Carbon nanotubes are not grown directly from the surface of graphene, and the two are only physically recombined by elec

Method used

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  • Preparation method of three-dimensional-structure graphene/carbon nanotube hybrid carbon material
  • Preparation method of three-dimensional-structure graphene/carbon nanotube hybrid carbon material
  • Preparation method of three-dimensional-structure graphene/carbon nanotube hybrid carbon material

Examples

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Example Embodiment

[0043] Example 1:

[0044] Dissolve 0.005mol of nickel chloride, 0.015mol of hexamethylenetetramine and 0.02mol of resorcinol in 30mL of water to obtain a mixed solution; then transfer the mixed solution to a 50mL polytetrafluororeactor at 150°C Let it stand for 18 hours, cool to room temperature, and obtain a suspension; wash the above suspension by centrifugation, dry it at room temperature for 24 hours, take the dried powdery precursor and melamine according to the mass ratio of 1:5 and mix them In the tube furnace, under the protection of nitrogen (nitrogen flow rate 50mL / min), heat up from room temperature at 2℃ / min to 700℃, and keep it at this temperature for 3h; naturally cool to room temperature to obtain black powder; this black Put the powder in a 100mL beaker, add 50mL of hydrochloric acid with a molar concentration of 8mol / L, and stir for 48h at 60°C; then, filter with suction and wash with distilled water until the pH of the solution is 6.8-7.2. The resulting precipi...

Example Embodiment

[0047] Example 2:

[0048] Dissolve 0.005mol of nickel acetate, 0.015mol of urea, and 0.01mol of glucose in 30mL of distilled water to obtain a mixed solution; then transfer the mixed solution to a 50mL polytetrafluororeactor, react hydrothermally at 180℃ for 12h, and cool to room temperature , Obtain the suspension; centrifuge the above suspension and dry it at room temperature for 24 hours, mix the dried powdery precursor and melamine according to a mass ratio of 1:4, and put it in a tube furnace in an argon atmosphere Under the pressure (argon flow rate 50mL / min), heat up from room temperature at 2℃ / min to 800℃, and keep at this temperature for 2h; after natural cooling to room temperature, black powder is obtained; put this black powder into a 100mL beaker, Add 50 mL of hydrochloric acid with a molar concentration of 6mol / L and stir at 50°C for 48h; then, centrifuge and wash with distilled water several times until the pH of the solution is 6.8-7.2. Dry the centrifuged precip...

Example Embodiment

[0051] Example 3:

[0052] Dissolve 0.005mol of nickel sulfate, 0.015mol of potassium hydroxide, and 0.015mol of sucrose in 35mL of distilled water to obtain a mixed solution; then transfer the mixed solution to a 50mL polytetrafluororeactor, and hydrothermally react at 180°C for 24h; cool to After room temperature, obtain the suspension; centrifuge the above suspension and dry it at room temperature for 24 hours, take the dried powdery precursor and dicyandiamide according to a mass ratio of 1:4, mix them, and put them in a tube furnace. Under nitrogen atmosphere (nitrogen flow rate 50mL / min), heat up from room temperature at 2℃ / min to 900℃, and keep it at this temperature for 1h; after natural cooling to room temperature, black powder will be obtained; put this black powder into a 100mL beaker Add 50 mL of hydrochloric acid with a molar concentration of 6mol / L and stir at 80°C for 36 hours; after that, centrifuge and wash with distilled water several times until the pH of the s...

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Abstract

The invention discloses a preparation method of a three-dimensional-structure graphene/carbon nanotube hybrid carbon material. The preparation method comprises the following steps: sufficiently dissolving a divalent metal salt, a carbon source precursor and a precipitant in water to obtain a mixed solution; carrying out hydrothermal reaction on the mixed solution to obtain a suspension; sequentially carrying out centrifugation, washing and drying, and taking the dried brown powdery precursor; mixing and grinding the precursor and a cyanamide compound, and carrying out carbonization to obtain the black powder; and finally, carrying out pickling treatment on the black powder to obtain the three-dimensional-structure graphene/carbon nanotube hybrid carbon material. According to the preparation method, the self-template in-situ carbonization catalytic technique is adopted to prepare the three-dimensional-structure graphene/carbon nanotube hybrid carbon material. The carbon nanotubes directly grow out of the graphene surface, and the carbon nanotubes and graphene are connected through sp2 covalent carbon bonds instead of simple physical mixing. The method is simple, is low in cost, and is suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a method for preparing a three-dimensional structure graphene / carbon nanotube hybrid carbon material. Background technique [0002] Carbon nanomaterials have always been a hot spot in scientific research. There are many kinds of carbon materials, which can be divided into zero-dimensional, one-dimensional, two-dimensional and three-dimensional carbon materials according to their dimensions. For example, fullerenes with a zero-dimensional structure were discovered in 1985; in 1991, Japanese scientist SumioIijima discovered carbon nanotubes with a one-dimensional structure; in 2004, two Russian physicists, Andrei Geim and Kostya Novoselov obtained two dimensional single-layer graphene. Graphene is a carbon atom SP 2 Hybridization forms a planar film with a hexagonal honeycomb lattice, only one carbon atom thick 2D carbon material, and other dimensional carbon materials such...

Claims

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Application Information

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IPC IPC(8): C01B32/162C01B32/184
CPCC01B2202/34C01B2204/32C01P2004/03
Inventor 梁济元闫继曹元成汤舜
Owner JIANGHAN UNIVERSITY
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