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Preparation method of carbon nano tubes

A technology for carbon nanotubes and preparation steps is applied in the field of preparation of carbon nanotubes, which can solve the problems of complicated steps and the like, and achieve the effects of simple steps, good catalytic performance, and realization of a large amount of filling.

Inactive Publication Date: 2013-09-25
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcomings of the traditional process in the preparation of carbon nanotubes, such as cumbersome steps and the introduction of gaseous hydrocarbons as carbon sources, and propose a carbon nanotube with simple operation, solid carbon source, and mild reaction conditions. Pipe preparation method The purpose of the present invention is achieved by the following technical solutions:

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0031] A kind of preparation method of carbon nanotube of the present invention, concrete preparation steps are as follows:

[0032] 1) Mix 0.6g cobalt nitrate hexahydrate, 4.0g citric acid, and 1.0g urea, and put them into a small 80mL beaker;

[0033] 2) Heat the mixture obtained in step 1) at 170°C for 20 minutes;

[0034] 3) Dissolve the heated mixture in step 2) in 20 mL of deionized water, stir with a magnetic stirrer at room temperature for 20 min, put the solution in a 50°C oven for 10 h, and evaporate to dryness to obtain a jelly;

[0035] 4) Heat the gelatinous substance evaporated to dryness in step 3) to 900°C in a tube furnace under nitrogen protection, keep at a constant temperature of 900°C for 1 hour, and obtain the final product after natural cooling;

[0036] Such as figure 1 , 2 As shown, the carbon nanotubes prepared in Example 1 have a uniform diameter in the scanning electron microscope image.

[0037] Such as image 3 As shown, it proves that the ca...

Embodiment 2

[0044] A kind of preparation method of carbon nanotube of the present invention, concrete preparation steps are as follows:

[0045] 1) Mix 0.3g of nickel acetate tetrahydrate, 2.0g of citric acid, and 0.5g of urea into a small 80mL beaker;

[0046] 2) Heat the mixture obtained in step 1) at 170°C for 20 minutes;

[0047] 3) Dissolve the heated mixture in step 2) in 20 mL of deionized water, stir with a magnetic stirrer at room temperature for 20 min, put the solution in a 50°C oven for 10 h, and evaporate to dryness to obtain a jelly;

[0048] 4) Heat the jelly-like substance evaporated to dryness in step 3) to 800°C in a tube furnace under the protection of argon, keep at a constant temperature of 800°C for 1 hour, and obtain the final product after natural cooling;

[0049] Such as Figure 9 As shown in the XRD spectrum of the carbon nanotubes prepared in Example 2, the metal particles filled are metallic nickel (Ni).

Embodiment 3

[0051] A kind of preparation method of carbon nanotube of the present invention, concrete preparation steps are as follows:

[0052] 1) Mix 0.6g ferric nitrate, 2.0g citric acid, and 1.0g urea, and put them into a small 80mL beaker;

[0053] 2) Heat the mixture obtained in step 1) at 170°C for 20 minutes;

[0054]3) Dissolve the heated mixture in step 2) in 20 mL of deionized water, stir with a magnetic stirrer at room temperature for 20 min, put the solution in a 50°C oven for 10 h, and evaporate to dryness to obtain a jelly;

[0055] 4) Heat the jelly-like substance evaporated to dryness in step 3) to 800°C in a tube furnace under the protection of argon, keep at a constant temperature of 800°C for 1 hour, and obtain the final product after natural cooling;

[0056] Such as Figure 10 As shown in the hysteresis loop diagram of the carbon nanotubes prepared in Example 3, it can be seen that the carbon nanotubes have a certain magnetic effect through the filling of a large n...

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Abstract

The invention relates to a preparation method of carbon nano tubes, belonging to the field of preparation of carbon nano tubes. The preparation method provided by the invention comprises the following steps: firstly, mixing a catalyst with a complexing agent and a carbon source according to a proportion, and heating the mixture at 100-200 DEG C for 5-30 minutes; and then, dissolving the mixture in water, drying the mixture in an oven of 50-80 DEG C to obtain jelly; and finally, heating the jelly under a protective gas condition to 400-1000 DEG C, and calcining the jelly for 30-120 minutes to obtain a final product. The method provided by the invention is simple in steps, convenient to operate, low in demand on preparation equipment and capable of improving the safety in the experimental process. The carbon nano tubes prepared by the preparation method disclosed by the invention are uniform in diameters, good in conductivity and good in catalytic properties and magnetic action.

Description

technical field [0001] The invention relates to a preparation method of carbon nanotubes, which belongs to the field of preparation of carbon nanotubes. Background technique [0002] Traditionally, chemical vapor deposition (CVD) is mainly used in the preparation of carbon nanotubes. The specific process is: first, metal oxides such as Co, Fe, Ni or metal salts are complexed with a complexing agent to form a catalyst precursor, and then the catalyst precursor is put into a muffle furnace, hydrogen is passed through for reduction for a period of time, and then passed through The mixed gas of hydrocarbon gas (carbon source) and hydrogen is fed in according to a certain ratio to prepare carbon nanotubes. In the process of preparing carbon nanotubes in this method, the steps are cumbersome, and different gases (using gaseous carbon sources) are introduced twice. During the process of introducing gases, the ratio of reducing gas and gaseous carbon sources is often controlled, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y30/00C01B32/16
Inventor 严乙铭张小雪杨志宇孙克宁
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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