Preparation method of graphene hybrid carbon nanotube

A technology of ene hybrid carbon and carbon nanotubes, which is applied in the field of new materials and its preparation, can solve the problems of reduced synergy between carbon nanotubes and graphene, difficult interface contact, etc., to facilitate engineering scale-up and mass production, and improve The effect of mechanical properties

Inactive Publication Date: 2016-08-03
TIANJIN XITENG SCI & TECH CO LTD
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Problems solved by technology

[0007] At present, the method of preparing composite materials that take into account the characteristics of carbon nanotubes and graphene basically adopts the method of physical mixing (NanoLett.9, 1949-55, 2009), and the basic process is to oxidize Graphite is simply mechanically mixed in the solution, and then graphite oxide is reduced to become a hybrid composite of carbon nanotubes and reduced graphene. However, in such composite materials, the carbon nanotubes and graphene only rely on physical overlap. role, it is difficult to form a good interfacial contact, therefore, the synergistic performance of carbon nanotubes and graphene is greatly reduced

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  • Preparation method of graphene hybrid carbon nanotube
  • Preparation method of graphene hybrid carbon nanotube
  • Preparation method of graphene hybrid carbon nanotube

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preparation example Construction

[0035] The method for preparing the catalyst is an ultrasonic method or a high pressure method.

[0036] The ultrasonic method refers to mixing the homogeneous solution containing the active component with the catalyst carrier, and then ultrasonically mixes it at a frequency of 15KHz to 30HZ for 0.1 to 24 hours; the high pressure method refers to mixing the homogeneous solution containing the active component The solution is mixed with the catalyst carrier, and then kept under the pressure of 0.1-70 MPa for 0.1-24 hours.

[0037] 2) the catalyst is placed in the reactor, through the chemical vapor deposition process, carbon nanotubes or graphene are deposited on the surface of the catalyst. The described chemical vapor deposition process is to use the mixed gas of carbon source and carrier gas, in 600-950°C, carbon nanotubes and graphene are generated. The deposition of carbon nanotubes and graphene is carried out simultaneously or step by step.

[0038] Described carbon sou...

Embodiment 1

[0041] Embodiment 1: Graphene hybrid carbon nanotubes are prepared by fixed bed with flake graphite as catalyst carrier.

[0042] Flake graphite is a natural layered carbon material. Fe(NO 3 )2 solution, and then take 500 mesh flake graphite and impregnate it into the above solution. Ultrasonic at 15KHz for 24 hours, the solution basically penetrated into the graphite flakes. The graphite flakes after ultrasonic impregnation were then dried at 60 °C for 12 hr. Then it was calcined at 400° C. for 30 minutes and then cooled to form a catalyst having a structure in which the metal active component is distributed among the layered carbon material support sheets, and the active component iron accounts for 10% of the mass fraction of the catalyst. Then take 1g of the above-mentioned catalyst and place it in a fixed-bed reactor with a diameter of 20mm and a length of 1100mm, using hydrogen and hydrogen as carrier gas, and the flow rates are 400sccm and 50sccm respectively. Under ...

Embodiment 2

[0043] Embodiment 2: Prepare graphene hybrid carbon nanotubes by fixed bed with expanded graphite as catalyst carrier.

[0044] Configuration mass concentration is 20% Ni (N0 3 ) 2 solution, then take 4g of expanded graphite and impregnate it into the above solution. Ultrasonic at a frequency of 30HZ for 0.1 hour, the solution components penetrate into the expanded graphite. Then the impregnated expanded graphite was dried at 100° C. for 12 hours. After calcination at 200°C for 120min, after cooling, the catalyst has a structure in which the metal active component is distributed between the layered carbon material support sheets, and the active component Ni accounts for 0.1% of the mass fraction of the catalyst. Take 3.0 g of catalyst and place it in a fixed bed with a diameter of 150 mm and a length of 1100 mm, using helium and hydrogen as carrier gases with flow rates of 400 sccm and 20 sccm respectively. Under this atmosphere, the temperature was raised to 950° C., and ...

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Abstract

The invention relates to a method for preparing graphene hybrid carbon nanotubes. The hybrid is composed of carbon nanotubes and layered carbon materials, and the carbon nanotubes are distributed between sheets of the layered carbon materials; The precursor of the layered carbon material is made into a homogeneous solution, and the layered carbon material carrier is impregnated in the homogeneous solution, and the active component is dispersed and intercalated between the sheets of the layered carbon material by high pressure or ultrasonic method, and then heated at 200 to 600 Calcining at ℃ to form a catalyst with such a structure that the metal active components are distributed between the carrier sheets; the catalyst is placed in the reactor, and carbon nanotubes or carbon nanotubes are deposited on the surface of the catalyst through a chemical vapor deposition process Graphene. The invention can obtain graphene hybrid carbon nanomaterials with a special structure in large quantities; the carriers, catalyst precursors and carbon sources involved in various precursors used in the method are cheap and easy to obtain, and are convenient for engineering enlargement and mass production.

Description

technical field [0001] The invention relates to a method for preparing graphene hybrid carbon nanotubes, in particular to a method for preparing graphene hybrid carbon nanotubes based on a layered carbon material carrier. It belongs to the technical field of new materials and their preparation. Background technique [0002] Carbon nanotubes are (such as figure 1 ) was first discovered in 1991. Carbon nanotubes can be regarded as a one-dimensional tubular structure formed by curling graphene sheets. In an ideal carbon nanotube structure, the carbon atoms are all in Sp2 hybrid bonding mode, the tube wall has no dangling bonds, and the aspect ratio is huge. The above characteristics determine its excellent performance in electromagnetism, mechanics, heat and so on. Studies have shown that carbon nanotubes are about 100 times stronger in the c-axis than steel, yet only one-sixth as dense as steel. The resistance of carbon nanotubes is 4.2KΩ·μm -1 ~190KΩ·μm -1 ;Axial therm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01B31/04B82Y30/00B01J23/745B01J23/75B01J23/755B01J23/72B01J23/28B01J21/18
CPCB82Y30/00B01J21/185B01J23/28B01J23/72B01J23/745B01J23/75B01J23/755C01P2004/64
Inventor 孙占威孙领弟朱春野孙曌
Owner TIANJIN XITENG SCI & TECH CO LTD
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