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Preparation method of small-tube-diameter carbon nanotubes

A technology of carbon nanotubes and multi-walled carbon nanotubes, which is applied in the directions of carbon nanotubes, single-walled carbon nanotubes, multi-walled carbon nanotubes, etc. It is easy to fuse and agglomerate to avoid uneven size, huge surface area and activity, and avoid fusion and growth.

Active Publication Date: 2019-07-05
JIANGXI COPPER TECHNOLOGY RESEARCH INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this high-temperature growth process can artificially control the structure of the catalyst, it is only suitable for substrate growth, and the catalyst is also easy to fuse and agglomerate at high temperature. high difficulty

Method used

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  • Preparation method of small-tube-diameter carbon nanotubes
  • Preparation method of small-tube-diameter carbon nanotubes

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preparation example Construction

[0030] Such as figure 1 Shown, the preparation method of a kind of thin tube diameter carbon nanotube of the present invention, this method specifically comprises:

[0031] S1. Preparation of iron-containing metal-organic framework compounds;

[0032] S2. After the iron-containing metal organic framework compound prepared in S1 is separated, washed and dried, soaked in a solution containing rare earth ions, and then carbonized in an inert gas to obtain a porous carbon material loaded with iron and rare earth elements;

[0033] S3. The porous carbon material loaded with iron and rare earth elements is treated with a high-temperature plasma torch, and carbon nanotubes with a diameter of ≤5 nanometers are obtained during the downward process.

[0034] According to an embodiment of the present disclosure, the carbon nanotubes are multi-walled carbon nanotubes, double-walled carbon nanotubes or single-walled carbon nanotubes.

[0035] According to an embodiment of the present dis...

Embodiment 1

[0048] 0.01 mol / L ferric chloride and 0.02 mol / L terephthalic acid were solvothermally reacted in NN-dimethylformamide at 150°C for 24 hours, separated and washed, and vacuum-dried at 60°C to obtain iron ion-containing metal organic framework compounds. Then soak in 0.01 mol / L yttrium nitrate solution, separate and dry, and carbonize at 500° C. for 2 hours under a nitrogen atmosphere to obtain a porous carbon material loaded with iron and rare earth. Using 50Kw radio frequency plasma spraying equipment as a high-temperature heat source, firstly evacuate the plasma chamber to 500Torr, then pass in argon: helium = 1:5 mixed arc starting gas from the plasma spray gun, turn on the power of the equipment to obtain a stable plasma torch, Then, the porous carbon material loaded with iron and rare earth is injected through the mixed carrier gas of argon:hydrogen=95:5, the injection flow rate is 0.5 g / s, and enters the ion reaction chamber through the center of the plasma torch, and re...

Embodiment 2

[0050] 1 mol / L ferric sulfate and 4 mol / L phthalic acid were solvothermally reacted in NN-dimethylformamide at 200°C for 72 hours, separated, washed, and vacuum-dried at 60°C to obtain a metal containing iron ions Organic framework compounds. Then soak in a 0.1 mol / L lanthanum nitrate solution, separate and dry, and carbonize at 500° C. for 2 hours under a nitrogen atmosphere to obtain a porous carbon material loaded with iron and rare earth. Using 50Kw radio frequency plasma spraying equipment as a high-temperature heat source, first vacuumize the plasma chamber to 500Torr, then pass in argon: helium = 1:2 mixed arc starting gas from the plasma spray gun, turn on the power of the equipment to obtain a stable plasma torch, Then, the porous carbon material loaded with iron and rare earth is injected through argon:hydrogen=95:5 mixed carrier gas, the injection flow rate is 5 g / s, and enters the ion reaction chamber through the center of the plasma torch, and at the same time, et...

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Abstract

The invention belongs to the technical field of novel material and relates to a preparation method of small-tube-diameter carbon nanotubes. The method includes generating an iron-containing metal-organic framework compound from iron ions and an organic ligand through a solvothermal process; after separation, washing and drying, soaking the compound in a solution containing rare earth ions and thenperforming carbonization in an inert gas to obtain a porous carbon material loaded with iron; and ejecting the porous carbon material, as a solid carbon source and a catalyst, from a plasma torch byadopting a high-temperature plasma process to gasify the carbon source and catalyst through high temperature so that carbon nanotubes grow during following downstream cooling. The porous carbon material derived from the metal-organic framework compound can enable ultrafine particle uniform distribution of original iron element and the porous carbon facilitates high-temperature gasification, thus providing an ultrafine nanometer catalyst and highly active carbon source for growth of ultrafine carbon nanotubes, and greatly increasing the growth efficiency of the small-tube-diameter carbon nanotubes. The method is an effective means for preparing the small-tube-diameter carbon nanotubes and single-walled carbon nanotubes, and has important practical application value.

Description

technical field [0001] The invention belongs to the technical field of new materials, and relates to a nano-carbon material, in particular to a preparation method of a thin-diameter carbon nanotube. Background technique [0002] Carbon nanotube is a one-dimensional tubular nanostructure composed of carbon-carbon covalent bonds. It has a complete crystalline carbon structure, which makes it show attractive application prospects in the fields of mechanics, electricity and thermals. Composite materials, conductive fillers, energy, thermal management and functional devices all have broad application prospects. Especially in the field of mechanical reinforcement and conductive filling, the combination of its one-dimensional nanostructure and its own characteristics makes it surpass traditional filling modified materials, and is expected to become a class of bulk basic materials with a huge potential market size. [0003] Carbon nanotubes can be divided into single-walled carbon ...

Claims

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Application Information

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IPC IPC(8): C01B32/162C01B32/159B82Y30/00B82Y40/00
CPCC01B32/162C01B32/159B82Y30/00B82Y40/00C01B2202/02C01B2202/06C01B2202/04C01B2202/36
Inventor 陈名海阮超袁鑫鑫
Owner JIANGXI COPPER TECHNOLOGY RESEARCH INSTITUTE CO LTD
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