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Method for preparing carbon nano tube by taking coke as raw material and prepared carbon nano tube

A carbon nanotube, coke technology, applied in the direction of carbon nanotube, nanocarbon, nanotechnology, etc., to achieve the effect of economy and quality assurance, easy operation, and ensure uniform gasification

Inactive Publication Date: 2015-01-28
CHINA UNIV OF PETROLEUM (BEIJING) +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there is no report showing that whether the single-walled carbon nanotubes or multi-walled carbon nanotubes are prepared can be controlled by the same method and different reaction conditions.

Method used

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  • Method for preparing carbon nano tube by taking coke as raw material and prepared carbon nano tube
  • Method for preparing carbon nano tube by taking coke as raw material and prepared carbon nano tube
  • Method for preparing carbon nano tube by taking coke as raw material and prepared carbon nano tube

Examples

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preparation example Construction

[0070] The preparation method of carbon nanotubes of the present invention may comprise the following steps:

[0071] (1) Pulverize the coke, sieve it to a particle size of less than 150 μm, and then dry it to obtain pretreated coke; mix the pretreated coke with coker wax oil at a mass ratio of 2:1-3:1 Stir and mix evenly to obtain a mixture of coke and coked wax oil; the mixture of coke and coked wax oil is molded using a mold and a hydraulic press, wherein the molding pressure of the hydraulic press is 10 atmospheres, and the molding speed is 0.5cm / s. Obtaining a hollow coke rod with an outer diameter of 11-13mm and an inner diameter of 7-9mm;

[0072] (2) cutting the hollow coke rod with an outer diameter of 11-13 mm and an inner diameter of 7-9 mm into a uniform length of 10 cm;

[0073] (3) at 0.15-0.25m 3 Under the protection of nitrogen at a flow rate of / h, the above-mentioned hollow coke rod with an outer diameter of 11-13mm, an inner diameter of 7-9mm, and a length...

Embodiment 1

[0080] The present embodiment provides a kind of single-walled carbon nanotube, and its preparation method comprises the following steps:

[0081] (1) 500g of coke (the composition analysis results of the coke are shown in Table 1) was pulverized in a pulverizer, and sieved to a particle size of less than 150μm, and then dried to obtain pretreated coke; 200g of the pretreated The treated coke and 100g of coking wax oil are stirred and mixed evenly in a stirrer to obtain a mixture of coke and coking wax oil; the mixture of coke and coking wax oil is put into a mold, and a hydraulic press is used for compression molding, wherein, The molding pressure of the hydraulic press is 10 atmospheres, and the molding speed is 0.5cm / s to obtain a hollow coke rod with an outer diameter of 12mm and an inner diameter of 8mm;

[0082] (2) Cut the hollow coke rod with an outer diameter of 12 mm and an inner diameter of 8 mm into a uniform length of 10 cm;

[0083] (3) Put the above-mentioned h...

Embodiment 2

[0092] This embodiment provides a double-walled carbon nanotube, the preparation method of which is basically the same as that of Example 1, the difference being that in the step of performing the arc discharge gasification reaction, nitrogen is used instead of helium as the reaction gas, The single-walled carbon nanotubes formed on the collecting frame and the double-walled carbon nanotubes formed on the surface of the anode are obtained.

[0093] Collect the prepared single-walled carbon nanotubes and double-walled carbon nanotubes, weigh and calculate the yield respectively, and obtain the yield of the single-walled carbon nanotubes of this embodiment as 0.64g / h, and the yield of the double-walled carbon nanotubes is 0.64g / h. The productivity was 0.3 g / h.

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Abstract

The invention provides a method for preparing a carbon nano tube by taking coke as a raw material and the prepared carbon nano tube. The method comprises the following steps: preparing a hollow coke rod; carbonizing the hollow coke rod; crushing a part of carbonized hollow coke rod to obtain the carbonized coke powder; mixing a catalyst with the carbonized coke powder to obtain a catalyst mixture; filling the catalyst mixture into the other part of the carbonized hollow coke rod to obtain the carbonized coke rod with the catalyst; and carrying out an arc discharge gasification reaction based on the carbonized coke rod with the catalyst as an anode, thereby obtaining the carbon nano tube. The invention also provides a single-wall carbon nano tube, a double-wall carbon nano tube and a three-wall carbon nano tube prepared by the method. According to the preparation method, the coke serves as the raw material, the positions of the reaction gas and the collected carbon nano tube are controlled, and different types of carbon nano tubes are prepared, so that the prepared carbon nano tube has the advantages of high purity, high yield, high mechanical and electronic performances and the like.

Description

technical field [0001] The invention relates to a method for preparing carbon nanotubes by using coke as a raw material, and the carbon nanotubes prepared by the method, belonging to the technical field of carbon nanotubes. Background technique [0002] Carbon nanotube (Carbon nanotube) is a novel carbon structure discovered in 1991. The ideal carbon nanotube is a seamless, hollow tube formed by rolling graphene sheets formed by carbon atoms. According to the number of layers of graphene sheets, carbon nanotubes can be divided into: single-walled carbon nanotubes (or single-walled carbon nanotubes, Single-walled Carbon nanotubes, SWCNTs) and multi-walled carbon nanotubes (or multilayer carbon nanotubes , Multi-walled Carbon nanotubes, MWNTs). [0003] Single-walled carbon nanotubes are composed of a single-layer cylindrical graphite layer, with a small diameter distribution range, few defects, and high uniformity. The diameter of SWCNTs can be 1-6 nm. The smallest diamet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/02B82Y40/00C01B32/16
Inventor 李永峰徐凯徐春明高金森徐新生高岩
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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