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A kind of preparation method of fine-diameter carbon nanotube

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. Easy fusion and agglomeration, to avoid uncontrollable diameter structure, huge surface area and activity, and avoid fusion and growth.

Active Publication Date: 2022-03-25
JIANGXI COPPER TECHNOLOGY RESEARCH INSTITUTE CO LTD
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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

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  • A kind of preparation method of fine-diameter carbon nanotube

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preparation example Construction

[0030] like figure 1 As shown, the present invention is a kind of preparation method of small diameter carbon nanotubes, and the method specifically includes:

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

[0032] S2. After separating, washing and drying the iron-containing metal-organic framework compound prepared in S1, soak in a solution containing rare earth ions, and then carbonize 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 processed by 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 the embodiment of the present disclosure...

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, after separation, washing, and vacuum drying at 60 °C to obtain iron ions containing metal organic framework compounds. Subsequently, 0.01 mol / L yttrium nitrate solution was infiltrated, separated and dried, and carbonized at 500° C. for 2 hours in a nitrogen atmosphere to obtain a porous carbon material loaded with iron and rare earth. Using a 50Kw radio frequency plasma spraying equipment as a high temperature heat source, the plasma chamber was first evacuated to 500 Torr, and then a mixture of argon:helium=1:5 arcing gas was introduced into the plasma spray gun, and the equipment power was turned on to obtain a stable plasma torch. Then, the porous carbon material loaded with iron and rare earth was injected through a mixed carrier gas of argon: hydrogen = 95:5, and the injection flow was 0.5 g / s, and entered the ion reaction chambe...

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, after separation, washing, and vacuum drying at 60 °C to obtain metal containing iron ions organic framework compounds. Subsequently, 0.1 mol / L lanthanum nitrate solution was infiltrated, separated and dried, and carbonized at 500 °C for 2 hours in a nitrogen atmosphere to obtain a porous carbon material loaded with iron and rare earth. Using a 50Kw radio frequency plasma spraying equipment as a high temperature heat source, the plasma chamber was first evacuated to 500 Torr, then a mixture of argon:helium=1:2 arcing gas was introduced into the plasma spray gun, and the equipment power was turned on to obtain a stable plasma torch. Then, the porous carbon material loaded with iron and rare earth was injected through the mixed carrier gas of argon: hydrogen = 95:5, the injection flow rate was 5 g / s, and entered the ion reaction chamber through the ...

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Abstract

The invention belongs to the technical field of new materials, and relates to a method for preparing carbon nanotubes with fine-diameter diameters: iron ions and organic ligands are used to generate iron-containing metal-organic framework compounds through a solvothermal method, and after separation, washing and drying, Wetting a solution containing rare earth ions, followed by carbonization in an inert gas to obtain a porous carbon material loaded with iron; then, it is directly used as a solid carbon source and catalyst, and is ejected from a plasma torch by a high-temperature plasma method. The source and catalyst are vaporized, and carbon nanotubes are grown during subsequent down-cooling. Because the porous carbon material derived from metal-organic framework compounds can make the original iron element obtain a uniform distribution of ultrafine particles, and the porous carbon is conducive to high-temperature gasification, providing an ultrafine nanocatalyst and high activity for the growth of ultrafine carbon nanotubes. The carbon source greatly improves the growth efficiency of thin-diameter carbon nanotubes, is an effective means for preparing thin-diameter carbon nanotubes and single-wall carbon nanotubes, and has important practical application value.

Description

technical field [0001] The invention belongs to the technical field of new materials, relates to a nano carbon material, and in particular relates to a preparation method of a small diameter carbon nano tube. Background technique [0002] Carbon nanotubes are one-dimensional tubular nanostructures composed of carbon-carbon covalent bonds. They have an intact crystalline carbon structure, making them attractive for applications in the fields of mechanics, electricity, and heat. Composite materials, conductive fillers, energy, thermal management and functional devices all have broad application prospects. Especially in the field of mechanical enhancement and conductive filling, the combination of its one-dimensional nanostructure and its own characteristics makes it surpass traditional filling and 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 n...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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