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Carbon nanotube taking alcohol solvent as carbon source and preparation method of carbon nanotube

An alcohol solvent, carbon nanotube technology, applied in the directions of carbon nanotubes, nanocarbons, chemical instruments and methods, etc., can solve the problems of low degree of graphitization, uneven tube diameter, low proportion of tubular structure, etc. The effect of strong performance, simple calcination process and easy operation

Inactive Publication Date: 2021-06-18
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still the following disadvantages: first, the metal catalysts used need to undergo multi-step pretreatment before they have catalytic activity; There are certain limitations; third, in the obtained carbon nanotube products, there are still situations such as low proportion of tubular structure, uneven tube diameter, and many crystal defects, resulting in low degree of graphitization and easy bending of carbon nanotubes. and deformation
The above reasons cause the chemical vapor deposition method to be subject to certain restrictions in terms of industrial application.

Method used

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  • Carbon nanotube taking alcohol solvent as carbon source and preparation method of carbon nanotube
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  • Carbon nanotube taking alcohol solvent as carbon source and preparation method of carbon nanotube

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Experimental program
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Effect test

Embodiment 1

[0034] In order to prove that ethanol has an optimal effect on the growth of carbon nanotubes, the following experiments are carried out to verify:

[0035] (1) Co(OAc) 2 4H 2 O (1.0mmol) and urea (5.0mmol) were dissolved in 50mL ethanol, and reacted at reflux at 50°C for 8h. After cooling, the product was collected by centrifugation and vacuum-dried at 70°C for 12 hours to obtain the MOF material Co-U-1.

[0036] (2) Take two copies of Co-U-1 (50 mg), put them in centrifuge tubes, add 3 mL of n-hexane and 3 mL of ethanol, and calcine under the same conditions after ultrasonication for 30 min. Calcination conditions: under nitrogen atmosphere, the heating rate of the first stage of calcination is 2°C min -1 , the holding temperature is 150°C, and the holding time is 1.5h; followed by the second stage of calcination, the heating rate is 2°C min -1 , the holding temperature is 700°C, and the holding time is 4h.

[0037] Such as figure 1Shown, find by the comparative figure...

Embodiment 2

[0039] In order to verify whether ethanol can have a certain influence on the growth of carbon nanotubes, the following experiments are carried out to verify:

[0040] (1) Co(OAc) 2 4H 2 O (1.0mmol) and urea (7.0mmol) were dissolved in 60mL of ethanol, and reacted under reflux at 60°C for 7h. After cooling, the product was collected by centrifugation and vacuum-dried at 70°C for 12 hours to obtain the MOF material Co-U-2.

[0041] (2) Take two copies of Co-U-2 (100 mg) and place them in centrifuge tubes. Add 5 mL of ethanol to one part and sonicate for 30 minutes, and the other part without adding ethanol. Two samples were calcined under the same conditions. Calcination conditions: under nitrogen atmosphere, the heating rate of the first stage of calcination is 2°C min -1 , the holding temperature is 160°C, and the holding time is 1h; then the second stage of calcination, the heating rate is 2°C min -1 , the holding temperature is 800°C, and the holding time is 3h.

[00...

Embodiment 3

[0044] In order to obtain functionalized carbon nanotubes, and to further prove that the solvent is involved in the growth of carbon nanotubes as a carbon source, we replaced the solvent added by calcination with octafluoropentanol. The experimental steps are as follows:

[0045] (1) Co(OAc) 2 4H 2 O (1.0mmol) and urea (8.0mmol) were dissolved in 60mL ethanol, and reacted at reflux at 70°C for 5h. After cooling, the product was collected by centrifugation and vacuum-dried at 70°C for 12 hours to obtain the MOF material Co-U-3.

[0046] (2) Put Co-U-3 (150mg) in a centrifuge tube, add 4mL octafluoropentanol and 4mL ethanol, sonicate for 30min, and then calcined. Calcination conditions: under nitrogen atmosphere, the heating rate of the first stage of calcination is 2°C min -1 , the holding temperature is 180°C, and the holding time is 0.5h; followed by the second stage of calcination, the heating rate is 2°C min -1 , the holding temperature is 900°C, and the holding time i...

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Abstract

The invention relates to a carbon nanotube taking an alcohol solvent as a carbon source and a preparation method of the carbon nanotube. The preparation method comprises the following steps of dissolving metal salt and urea in an alcohol solvent, and carrying out reflux reaction to obtain a metal organic framework (MOF) material after complete reaction, and calcining at 700-900 DEG C in an inert gas atmosphere by taking an alcohol solvent as a carbon source to obtain the carbon nanotube. Therefore, a functional solvent is utilized, alcohol containing heteroatoms such as fluorine is used as a carbon source, and the functionalized carbon nanotube is obtained through a one-step method.

Description

technical field [0001] The invention relates to the technical field of carbon nanotubes, in particular to carbon nanotubes using alcohol solvents as carbon sources and a preparation method thereof. Background technique [0002] Carbon nanotubes have a high aspect ratio, Young's modulus and high conductivity, so they play a pivotal role in the fields of composite material preparation, supercapacitors, photocatalysis, microelectronics and nanoelectronic devices. As early as 1953, someone conducted the CO and Fe reaction at 450°C 3 o 4 Wire-like carbon structural materials similar to carbon nanotubes were found in the reaction. Decades later, Iijima, an electron microscope scientist at the basic research laboratory of NEC Corporation in Japan, in 1991, in the research of preparing fullerene (C60) by graphite arc discharge method, accidentally discovered the multi- Coaxial tubular new fullerene carbons with a complete molecular structure composed of layered graphite shells, t...

Claims

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Application Information

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IPC IPC(8): C01B32/162
CPCC01B32/162C01B2202/30Y02E60/13
Inventor 顾宏伟曹雪琴周成燕耿洪波
Owner SUZHOU UNIV