Preparation method of cobalt nanoparticle/carbon nanotube composite material

A carbon nanotube and composite material technology, applied in chemical instruments and methods, chemical/physical processes, physical/chemical process catalysts, etc., can solve the problem of low cobalt loading, damage to the surface structure of carbon nanotubes, and complex cobalt nanoparticle processes. and other problems to achieve the effect of maintaining the surface structure and performance and simplifying the reaction steps

Inactive Publication Date: 2012-01-25
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0003] The present invention aims to solve the technical problems of the existing method for preparing cobalt nanoparticles loaded on the surface of carbon nanotubes with complex process, the surface structure of carbon nanotubes is destroyed, and the amount of cobalt loaded is small, and provides a cobalt nanoparticle / carbon nanotube Preparation method of composite material

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  • Preparation method of cobalt nanoparticle/carbon nanotube composite material
  • Preparation method of cobalt nanoparticle/carbon nanotube composite material
  • Preparation method of cobalt nanoparticle/carbon nanotube composite material

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specific Embodiment approach 1

[0009] Specific embodiment one: the preparation method of a kind of cobalt nanoparticle / carbon nanotube composite material of the present embodiment is carried out according to the following steps: one, weigh carbon nanotube, cobalt acetylacetonate and triethylene glycol and add in the container and mix uniformly , and then placed in an ultrasonic cleaning machine for 10min to 30min to obtain a mixed solution; wherein the mass ratio of carbon nanotubes to cobalt acetylacetonate is 1:1 to 4, the volume y of triethylene glycol and the quality x of carbon nanotubes satisfy function:

[0010] y=25(m+1), x∈(50m, 50(m+1)], m=0,1,2,...; the unit of y is mL, and the unit of x is g; two, the step Add the obtained mixed solution into the reactor with cooling reflux device, pass through the argon gas protection, then raise the temperature to boiling at the speed of 2°C / min~4°C / min, and keep the reflux for 30min~60min, and then lower to normal temperature , to obtain a mixed solution con...

specific Embodiment approach 2

[0012] Embodiment 2: This embodiment differs from Embodiment 1 in that: the ultrasonic treatment time in Step 1 is 12 min to 25 min. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0013] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the ultrasonic treatment time in Step 1 is 20 minutes. Others are the same as in the first embodiment.

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Abstract

The invention discloses a preparation method of a cobalt nanoparticle/carbon nanotube composite material, which relates to a preparation method of a carbon nanotube composite material and solves the technical problems that a traditional preparation method of a carbon nanotube surface-loaded cobalt nanoparticle has a complex process, a damaged carbon nanotube surface structure and low cobalt loading amount. The method comprises the following steps of: firstly, weighing the carbon nanotube, acetyl acetone cobalt and triethylene glycol and adding into a container, uniformly mixing and carrying out ultrasonic dispersion treatment; secondly, raising the temperature to be boiled at the speed of 2-4DEG C/min under the protection of argon gas, reflowing for 30-60min, magnetically separating the obtained mixed solution containing cobalt nanoparticle/carbon nanotube particles and drying to obtain the cobalt nanoparticle/carbon nanotube composite material. According to the preparation method disclosed by the invention, reaction steps are simplified and the original surface structure and performances of the carbon nanotube are retained. The loaded amount of cobalt reaches over 85 percent. Thecobalt nanoparticle/carbon nanotube composite material can be used as a catalyst carrier and a wave-absorbing material.

Description

technical field [0001] The invention relates to a preparation method of a carbon nanotube composite material. Background technique [0002] Cobalt nanoparticles have the characteristics of small size, large specific surface area, severely insufficient coordination number of surface atoms and a large number of defects, many surface active centers and high surface activity and magnetic loss. Therefore, cobalt can be used as catalyst and absorbing material. Carbon nanotubes are considered to be a good catalyst carrier and wave-absorbing material due to their graphite-like tube walls, nanoscale pores, quantum size effect, large specific surface area, and good thermal and electrical properties. The existing method for preparing cobalt nanoparticles loaded on the surface of carbon nanotubes needs to first acidify the carbon nanotubes, that is, to immerse the carbon nanotubes in the mixed acid of concentrated sulfuric acid and concentrated nitric acid with a volume ratio of 3:1, at...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J32/00B01J23/75C09K3/00
Inventor 隋解和于志亮李静
Owner HARBIN INST OF TECH
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