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Method for one-step growth of carbon nanotube by taking carbon composite as catalyst

A technology of carbon nanotubes and composites, which is applied in the field of one-step growth of carbon nanotubes using carbon-containing composites as catalysts, can solve the problems of many preparation steps, large energy consumption, and complicated process, and achieve simplified preparation steps, tube The effect of uniform diameter and lower production cost

Inactive Publication Date: 2009-09-16
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Patent: 03105056.5 uses layered composite metal hydroxide as a precursor to prepare a supported metal catalyst for growing carbon nanotubes. However, there are many preparation steps for growing carbon nanotubes from layered composite metal hydroxides. There are disadvantages such as complex process and large energy consumption

Method used

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  • Method for one-step growth of carbon nanotube by taking carbon composite as catalyst
  • Method for one-step growth of carbon nanotube by taking carbon composite as catalyst
  • Method for one-step growth of carbon nanotube by taking carbon composite as catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0024] 2.6172g Ni(NO 3 ) 2 ·6H 2 O and 1.1254g Al(NO 3 ) 3 9H 2O was added to 30ml deionized water to prepare a mixed salt solution, in which Ni 2+ The concentration is 0.3mol L -1 , Al 3+ The concentration is 0.1mol L -1 30ml of mixed alkali solution is prepared with 0.768g sodium hydroxide and 0.636g anhydrous sodium carbonate, wherein the concentration of sodium hydroxide is 0.64mol L -1 , the concentration of anhydrous sodium carbonate is 0.2molL -1 .

[0025] Quickly pour the prepared mixed salt solution and mixed alkali solution into the fully back-mixed liquid membrane reactor at room temperature and mix them, vigorously rotate and stir for 2 minutes, centrifuge the obtained suspension, and run it at 4000 rpm for 5 minutes , and washed 5 times with water to obtain a precipitate.

[0026] Dissolve 5.400g of glucose in 30ml of deionized water to prepare a solution, mix the prepared precipitate with the glucose solution, pour it into the reaction kettle, add wat...

Embodiment 2

[0028] 2.6193g Co(NO 3 ) 2 ·6H 2 O and 1.1254g Al(NO 3 ) 3 9H 2 O was added to 30ml deionized water to prepare a mixed salt solution, in which Co 2+ The concentration is 0.3mol L -1 , Al 3+ The concentration is 0.1mol L -1 30 milliliters of mixed alkaline solutions are prepared with 0.768g sodium hydroxide and 0.636g anhydrous sodium carbonate, wherein the concentration of sodium hydroxide is 0.64mol L -1 , the concentration of anhydrous sodium carbonate is 0.2mol L -1 .

[0029] Quickly pour the prepared mixed salt solution and mixed alkali solution into the fully back-mixed liquid membrane reactor at room temperature and mix them, vigorously rotate and stir for 5 minutes, centrifuge the obtained suspension, and run it at 4000 rpm for 5 minutes , and washed 5 times with water to obtain a precipitate.

[0030] Dissolve 4.05g of glucose into 30ml of deionized water to prepare a solution, mix the obtained precipitate with the glucose solution, pour it into the reactio...

Embodiment 3

[0032] 5.814g Ni(NO 3 ) 2 ·6H 2 O and 3.75g Al(NO 3 ) 3 9H 2 O was added to 50ml deionized water to prepare a mixed salt solution, in which Ni 2+ The concentration is 0.4mol L -1 , Al 3+ The concentration is 0.2mol L -1 ; Prepare 50 milliliters of mixed alkaline solutions with 1.92g sodium hydroxide and 2.12g anhydrous sodium carbonate, wherein the concentration of sodium hydroxide is 0.96mol L -1 , the concentration of anhydrous sodium carbonate is 0.4mol L -1 .

[0033] Quickly pour the prepared mixed salt solution and mixed alkali solution into the fully back-mixed liquid membrane reactor at room temperature and mix, vigorously rotate and stir for 3 minutes, centrifuge the obtained suspension, and run it at 4000 rpm for 5 minutes , and washed 4 times with water to obtain a precipitate.

[0034] Dissolve 20.54g of sucrose in 50ml of deionized water to prepare a solution, mix the prepared precipitate with the sucrose solution, pour it into the reaction kettle, add ...

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Abstract

The invention discloses a method for one-step growth preparation of a carbon nanotube by taking a layered composite metal hydroxide / carbon composite (LDHs / C) as a catalyst. The method firstly prepares the layered composite metal hydroxide / carbon composite (LDHs / C) and then uses the composite as the catalyst for the one-step growth of the carbon nanotube by utilizing CVD method. Carbon in the composite can reduce a metal oxide formed by calcination to metal nanoparticles with the same size, thereby catalyzing the growth of the carbon nanotube and completing the formation of the catalytic active metal particles and the growth of the carbon nanotube in one step. The tube diameter of the carbon nanotube prepared by the method is 10-30nm, the distribution of the tube diameter is even and the method has high yield and small content of impurities. The method simplifies the preparation steps of the carbon nanotube, shortens the production cycle, saves the production energy consumption and is applicable to the large-scale production.

Description

technical field [0001] The invention belongs to the field of preparing carbon nanotubes by using catalysts, and in particular relates to composite metal hydroxide / carbon composites, carbon nanotubes and a preparation method thereof. The carbon nanotubes prepared by the method are thinner, uniform in diameter, narrow in distribution, high in yield, simple in production process, and energy-saving. Background technique [0002] As a new type of functional material with a one-dimensional tubular molecular structure, carbon nanotubes show extremely high mechanical strength, special electrical conductivity, high specific surface area and strong adsorption due to their special structure. , Composite materials, energy storage materials and microelectronic devices and many other fields have shown great application prospects. [0003] At present, the methods for preparing carbon nanotubes reported in the literature mainly include graphite arc method, chemical vapor deposition (gas ph...

Claims

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Application Information

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IPC IPC(8): C01B31/02B01J23/755B01J23/75B01J21/18
Inventor 项顼白璐李峰
Owner BEIJING UNIV OF CHEM TECH
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