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Catalyst for carbon nanotube and preparation method and application thereof

A technology of carbon nanotubes and catalysts, which is applied in the field of catalysts for carbon nanotubes and their preparation, and can solve the problems of high volume density, poor dispersion, and complex interlacing and interlacing.

Active Publication Date: 2021-07-02
ENN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the wound carbon tubes have no directional guidance and are twisted, they have a spherical or cocoon shape and a high volume density. The production output of the carbon tubes is large, but because the carbon tubes are severely twisted and interspersed with each other, the dispersion is not good.

Method used

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  • Catalyst for carbon nanotube and preparation method and application thereof
  • Catalyst for carbon nanotube and preparation method and application thereof
  • Catalyst for carbon nanotube and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0080] Preparation of catalysts for carbon nanotubes:

[0081]Step 1: Mix nickel nitrate, aluminum nitrate, and ferric nitrate in 200mL of water and stir evenly, and control the concentrations of nickel nitrate, aluminum nitrate, and ferric nitrate to 0.1mol / L, 0.3mol / L, and 1mol / L respectively to obtain active components Salt solution; use ammonium molybdate tetrahydrate to prepare 50ml of a solution with a molybdenum content of 0.1mol / L, and use polyvinylpyrrolidone to prepare 5mL of a solution with a concentration of 0.05mol / L; add the molybdenum salt solution and polyvinylpyrrolidone solution to the stirred nitric acid In the salt solution, continue to stir for 30 minutes after the dropwise addition is completed, and then mix with 20mL ethanol to obtain a mixed solution;

[0082] Step 2: Pour 100mL of ammonia water with a concentration of 1mol / L into the above mixed solution, mix it evenly by ultrasonication for 30min, then place it in a hydrothermal reaction kettle, react...

Embodiment 2

[0087] Preparation of catalysts for carbon nanotubes:

[0088] Step 1: Mix nickel nitrate, magnesium nitrate, and ferric nitrate in 300mL of water and stir evenly, and control the concentrations of nickel nitrate, magnesium nitrate, and ferric nitrate to 0.1mol / L, 0.5mol / L, and 0.5mol / L respectively to obtain the active group 300ml of salt solution; use copper nitrate to prepare 50ml of a solution with a copper content of 0.1mol / L, and use polyvinylpyrrolidone to prepare 5mL of a solution with a concentration of 0.05mol / L; add the copper salt solution and polyvinylpyrrolidone solution to the stirred nitrate solution, continue to stir for 30 minutes after the dropwise addition, and then mix with 20mL ethanol to obtain a mixed solution;

[0089] Step 2: Pour the above-mentioned mixed solution into the mixed solution of 300ml sodium hydroxide (concentration: 2mol / L) + ammonium carbonate solution (concentration: 2mol / L), and ultrasonically mix for 30min; place it in a hydrothermal...

Embodiment 3

[0094] Preparation of catalysts for carbon nanotubes:

[0095] Step 1: mix cobalt nitrate, magnesium nitrate, ferric nitrate in 200mL water and mix evenly, control the concentration of cobalt nitrate, magnesium nitrate, ferric nitrate to be 0.2mol / L, 0.5mol / L, 0.3mol / L respectively, obtain active group Salt separation solution; 10ml of a solution with a molybdenum content of 0.1mol / L was prepared with ammonium molybdate tetrahydrate, and 5mL of a solution with a concentration of 0.05mol / L was prepared with polyvinylpyrrolidone; the molybdenum salt solution and polyvinylpyrrolidone solution were slowly added dropwise to In the rapidly stirred nitrate solution, continue to stir for 30 minutes after the dropwise addition is completed, and then mix with 200mL ethylene glycol to obtain a mixed solution;

[0096] Step 2: Pour the above mixed solution into 300mL ammonium carbonate (concentration: 0.3mol / L) and ammonia water (concentration: 0.5mol / L) mixture, stir evenly; place it in ...

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Abstract

The invention discloses a catalyst for carbon nanotube as well as a preparation method and application thereof, and the method for preparing the catalyst for the carbon nanotube comprises the following steps: mixing an active component with an auxiliary component to obtain a mixed solution; mixing and coprecipitating the mixed solution and a precipitant, and then carrying out solid-liquid separation and drying to obtain a catalyst precursor; roasting the catalyst precursor, wherein mixing the active component with the auxiliary agent component and an alcohol or / and mixing the catalyst precursor with the alcohol in advance before roasting the catalyst precursor for size mixing, and roasting to obtain the catalyst for the carbon nanotube. The catalyst for the carbon nanotube prepared by adopting the method is relatively high in particle crystallinity, relatively uniform in particle size, relatively large in size and relatively small in specific surface area, the black fluffy carbon nanotube with good dispersity can be obtained when the catalyst is used for preparing the carbon nanotube, the carbon nanotube is used for preparing conductive paste, the two requirements of relatively low viscosity and high conductive effect can be met at the same time, and the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of carbon nanomaterials, and in particular relates to a catalyst for carbon nanotubes and a preparation method and application thereof. Background technique [0002] As a one-dimensional nanomaterial, carbon nanotubes (CNTs) are light in weight, perfectly connected in a hexagonal structure, have excellent electrical conductivity, ultra-high mechanical strength, high chemical stability and thermal stability, and can be widely used It is used in high-performance composite materials, capacitors, hydrogen storage, electromagnetic absorbing materials and other fields. In recent years, with the in-depth research of carbon nanotubes and nanomaterials, their broad application prospects are constantly showing. [0003] At present, the preparation methods of carbon nanotubes mainly include arc discharge method, laser evaporation method and chemical vapor deposition method (Chemical Vapor Deposition, CVD). The genera...

Claims

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Application Information

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IPC IPC(8): B01J23/78B01J23/882B01J23/883B01J23/889C01B32/162H01B1/04
CPCB01J23/883B01J23/78B01J23/8892B01J23/882C01B32/162H01B1/04C01P2004/03
Inventor 曹雅琴王建民张建祥李阳陈曦
Owner ENN GRP CO LTD
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