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Fast preparation method for carbon nano tube/ graphene sandwich structure mateirals

A carbon nanotube and ene sandwich technology, which is applied in the field of rapid preparation of carbon nanotube/graphene sandwich structure materials, can solve the problems of large sample area, long time-consuming, low yield, etc., and achieve the effect of simple process

Active Publication Date: 2013-11-20
四川天策聚材科技有限公司
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  • Application Information

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Problems solved by technology

[0003] Chinese patent CN201110261623 discloses a method for preparing a composite thin film based on three-dimensional network morphology graphene-carbon nanotubes, but only using a liquid phase method to simply mix the two and assist post-reduction treatment cannot fully and effectively utilize the two characteristics of the
Chinese patent CN200910078292 discloses a method for forming a carbon composite structure with carbon nanotubes and graphene, which utilizes the mechanical properties of carbon nanotubes to effectively grow in a direction perpendicular to the substrate by means of mechanical scraping and pressure. On the one-dimensional multi-walled carbon nanotube array, combined with the carbon composite structure of two-dimensional graphene, the sample area obtained by this method is large, but the yield is low and time-consuming
L.L.Zhang et al. (L.L.Zhang, Z.G.Xiong, X.S.Zhao.ACS Nano.11(2010):7030-7036) prepared carbon tube pillared graphite by CVD method without using hydrogen and utilizing the reducibility of carbonaceous material itself The three-dimensional structure composite carbon material of ene, but this process needs to pass through the carbon source for 15-30 minutes to prepare the composite material, and the carbon source is toxic acetonitrile

Method used

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  • Fast preparation method for carbon nano tube/ graphene sandwich structure mateirals
  • Fast preparation method for carbon nano tube/ graphene sandwich structure mateirals
  • Fast preparation method for carbon nano tube/ graphene sandwich structure mateirals

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preparation example Construction

[0027] The specific steps of the preparation method of the three-dimensional carbon nanotube / graphene sandwich structure composite material of the present invention are:

[0028] 1) Place the catalyst in the middle of the heating zone of the horizontal reaction furnace to ensure sufficient heating. Under the protection of nitrogen atmosphere, heat it to the reaction temperature of 800-950°C at a heating rate of 8-12°C / min. This process is equivalent to roasting the catalyst. Production of active component oxides and partial reduction of catalysts to active metals using carbon supports;

[0029] Wherein, the nitrogen volume flow rate is 50-120mL / min, preferably 100mL / min; the catalyst is one of transition metal hydroxide / graphene oxide, preferably nickel hydroxide / graphene oxide;

[0030] 2) After rising to the reaction temperature, switch to methane, and perform chemical vapor deposition to grow carbon nanotubes. The reaction time is 5 minutes; wherein, the volume flow rate of...

Embodiment 1

[0035] Spread 50 mg of catalyst evenly in a ceramic boat, place it in the middle of the heating zone of the horizontal reaction furnace, and feed nitrogen gas with a volume flow rate of 100 mL / min, and raise the temperature to the reaction temperature of 850 °C at a rate of 8 °C / min under nitrogen atmosphere, switch Form methane, the methane volume flow rate is 80mL / min, react for 5min, close the methane, cool to room temperature in a nitrogen atmosphere, and prepare a carbon nanotube / graphene sandwich structure composite material sample.

Embodiment 2-13

[0037] Compared with Example 1, only the heating rate, or reaction temperature, or gas space velocity is different, and other processes are the same as Example 1, and each sample is prepared. The heating rate, reaction temperature and gas space velocity used in Examples 2 to 13 are shown in Table 1.

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Abstract

The invention belongs to the field of nano new materials, in particular to a fast preparation method for carbon nano tube / graphene sandwich structure materials. The fast preparation method includes: heating a catalyst under protection of nitrogen atmosphere to the reaction temperature of 800-950 DEG C with the temperature rising speed of 8-12 DEG C / min, and roasting and reducing the catalyst, wherein the catalyst is transition metal hydroxide loaded on a graphene oxide carrier; and changing the atmosphere air into methane to perform carbon nano tube production, and cooling the temperature to room temperature after reaction for 5 minutes under the atmosphere of nitrogen to obtain the carbon nano tube / graphene sandwich structure materials. By means of the fast preparation method, a hydrogen reduction catalyst is not needed, cheap and available methane serves as the carbon source, regular three-dimensional carbon nano tube / graphene sandwich structure materials can be prepared within 5 minutes, the process is simple, and the cost is low.

Description

technical field [0001] The invention belongs to the field of new nanometer materials, in particular to a rapid preparation method of a carbon nanotube / graphene sandwich structure material. Background technique [0002] Carbon nanotubes are seamless, hollow, one-dimensional nanoscale tubular structures rolled from single-layer or multi-layer graphite. Carbon nanotubes have very high mechanical strength and excellent electrical conductivity, and are regarded as good candidates for high-power electrode materials. However, the obtained carbon nanotubes are often randomly entangled with each other, cannot be uniformly dispersed, and the specific surface area is relatively small, which limits its research and application. Graphene is composed of single layer sp 2 A honeycomb two-dimensional planar crystal structure composed of hybridized carbon atoms. Although graphene has high electrical conductivity and extremely high theoretical specific surface area (~2630m 2 g -1 ), but ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02C01B31/04B82Y30/00B82Y40/00C01B32/162C01B32/184
Inventor 李云涛文婕
Owner 四川天策聚材科技有限公司