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Preparation method of graphene/carbon nanotube composite array material

A carbon nanotube array and graphene sheet technology, applied in the direction of carbon nanotubes, graphene, nanocarbon, etc., can solve the problem that graphene is difficult to separate carbon nanotubes evenly, achieve excellent ion exchange performance, and increase specific surface area , The effect of simple preparation process

Pending Publication Date: 2022-01-11
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these graphene / carbon nanotube composites are usually prepared by physically mixing carbon nanotubes and graphene, which makes it difficult for graphene to be uniformly separated by carbon nanotubes, therefore, by simply mixing carbon nanotubes and graphene As-prepared composites are not an effective way to overcome agglomeration

Method used

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  • Preparation method of graphene/carbon nanotube composite array material
  • Preparation method of graphene/carbon nanotube composite array material
  • Preparation method of graphene/carbon nanotube composite array material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1, preparing a graphene sheet / carbon nanotube array.

[0022] The first step is to prepare the catalyst.

[0023] Use vermiculite with a particle size of 4-8 mm and mix it with distilled water to form a suspension. Subsequently, ferric nitrate (Fe(NO 3 ) 3 9H 2 O), ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O) make homogeneous solution, after two kinds of solutions are fully mixed, slowly pour into vermiculite suspension and stir simultaneously, the mixture that obtains keeps 12 hours at 90 ℃, carries out ion exchange between vermiculite layer in this process, Ca 2+ , Mg 2+ , K + and Na + exchanged for Fe 3+ . Finally, it was filtered, dried, and calcined at 300 °C for 2 hours to obtain a layered Fe / Mo / vermiculite catalyst.

[0024] The second step is to prepare graphene sheets / carbon nanotubes.

[0025] Using experimental equipment such as figure 1 As shown, the prepared vermiculite was evenly spread on the bottom of the ceramic boat and plac...

Embodiment 2

[0027] The first step is to prepare the catalyst.

[0028] Use vermiculite with a particle size of 4-8 mm and mix it with distilled water to form a suspension. Subsequently, ferric nitrate (Fe(NO 3 ) 3 9H 2 O), ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O) make homogeneous solution, after two kinds of solutions are fully mixed, slowly pour into vermiculite suspension and stir simultaneously, the mixture that obtains keeps 12 hours at 90 ℃, carries out ion exchange between vermiculite layer in this process, Ca 2+ , Mg 2+ , K + and Na + exchanged for Fe 3+ . Finally, it was filtered, dried, and calcined at 300 °C for 2 hours to obtain a layered Fe / Mo / vermiculite catalyst.

[0029] The second step is to prepare graphene sheets / carbon nanotubes.

[0030] Using experimental equipment such as figure 1 As shown, the prepared vermiculite was evenly spread on the bottom of the ceramic boat and placed in the center of the heating area of ​​the quartz tube. Before the ...

Embodiment 3

[0032] The first step is to prepare the catalyst.

[0033] Use vermiculite with a particle size of 4-8 mm and mix it with distilled water to form a suspension. Subsequently, ferric nitrate (Fe(NO 3 ) 3 9H 2 O), ammonium molybdate ((NH 4 ) 6 Mo 7 o 24 4H 2 O) make homogeneous solution, after two kinds of solutions are fully mixed, slowly pour into vermiculite suspension and stir simultaneously, the mixture that obtains keeps 12 hours at 90 ℃, carries out ion exchange between vermiculite layer in this process, Ca 2+ , Mg 2+ , K + and Na + exchanged for Fe 3+ . Finally, it was filtered, dried, and calcined at 300 °C for 2 hours to obtain a layered Fe / Mo / vermiculite catalyst.

[0034] The second step is to prepare graphene sheets / carbon nanotubes.

[0035] Using experimental equipment such as figure 1 As shown, the prepared vermiculite was evenly spread on the bottom of the ceramic boat and placed in the center of the heating area of ​​the quartz tube. Before the re...

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Abstract

The invention provides a preparation method of a graphene / carbon nanotube composite array material. The preparation method comprises the following steps: (1) preparing a catalyst precursor with a layered material as a carrier and iron, cobalt, nickel, molybdenum, copper or a rare earth element as an active component through an ion exchange method, and calcining the catalyst precursor to obtain a catalyst-loaded layered material; and (2) by taking hydrogen as catalyst etching gas and hydrocarbon gas as a carbon source, preparing a graphene sheet / carbon nanotube array vertically growing between substrate layers through a radio frequency plasma enhanced chemical vapor deposition method under the action of a catalyst. The preparation method is simple in process, low in energy consumption, high in product purity and suitable for large-scale production; the prepared graphene sheet / carbon nanotube has the advantages of neat growth and arrangement, high quality, high yield and the like; and the composite array material has excellent ion exchange performance and a layered structure, and can be used as a good catalyst carrier and a composite material growth substrate at the same time.

Description

technical field [0001] The invention belongs to the field of functional materials and relates to the preparation of graphene / carbon nanotube composite array materials. Background technique [0002] Graphene has been widely studied due to its unique physical and chemical properties due to its two-dimensional structure, and it is widely used in energy storage and electronic devices due to its high specific surface area and excellent electrical conductivity. Despite these exceptional properties, graphene has an inherent agglomeration effect in its planar structure due to the van der Waals force, which often greatly reduces its specific surface area. Compared with graphene, the uniform one-dimensional structure of carbon nanotubes makes them less likely to agglomerate, but the specific surface area of ​​carbon nanotubes is smaller than that of graphene. In order to combine the advantages of two-dimensional graphene and one-dimensional carbon nanotubes, researchers have made man...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/162C01B32/186
CPCC01B32/162C01B32/186C01B2202/30C01B2204/30
Inventor 戴贵平周群怡谭龙
Owner NANCHANG UNIV
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