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Carbon nanotube surface loaded nano cobalt trioxide composite material and preparation method thereof

A technology of cobalt tetroxide and carbon nanotubes, which is applied in the fields of nanotechnology, nanotechnology, hybrid/electric double layer capacitor manufacturing, etc., can solve the problems of low distribution density of nanoparticles, uneven distribution of carbon nanotubes, and excessive size of nanoparticles. , to achieve the effects of good controllability and repeatability, favorable for rapid transmission and simple preparation process

Active Publication Date: 2017-02-15
杭州中盟智控科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Existing Co prepared on carbon nanotubes 3 o 4 Nanoparticles have problems of low distribution density, too large nanoparticle size, uneven size distribution, uneven distribution on carbon nanotubes, or agglomeration, which affects the carbon nanotube / Co 3 o 4 Properties of Composite Materials

Method used

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  • Carbon nanotube surface loaded nano cobalt trioxide composite material and preparation method thereof
  • Carbon nanotube surface loaded nano cobalt trioxide composite material and preparation method thereof
  • Carbon nanotube surface loaded nano cobalt trioxide composite material and preparation method thereof

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preparation example Construction

[0028] see figure 1 , which is a flow chart showing the steps of a method for preparing a carbon nanotube surface-supported nano-cobalt tetroxide composite material according to an embodiment of the present invention, which includes the following steps:

[0029] S10, weighing deionized water and dimethylformamide DMF in a ratio of 1:1-1:9, mixing and stirring evenly to obtain a mixed solvent;

[0030] S20, weighing the purified carbon nanotubes and mixed solvent according to the ratio concentration of 0.1-1g / L, putting the carbon nanotubes into the mixed solvent and performing ultrasonication for 10-60 minutes to obtain a carbon nanotube dispersion;

[0031] Among them, in the specific application example, the specific purification treatment steps of carbon nanotubes can be as follows: add 0.5g of carbon nanotubes prepared by chemical vapor deposition CVD method into 100ml of concentrated nitric acid, first ultrasonically disperse for 30min, and then heat and reflux for 4h to ...

Embodiment 1

[0041] Weigh 8ml of DMF and 2ml of deionized water, and stir evenly to obtain a mixed solvent. Weighing 4 mg of the purified carbon nanotubes, putting the carbon nanotubes into a mixed solvent and ultrasonicating for 60 minutes to obtain a carbon nanotube dispersion. Weigh 400 mg of cobalt (II) acetate tetrahydrate, dissolve the cobalt (II) acetate tetrahydrate to obtain a carbon nanotube dispersion, and stir until completely dissolved. Put the above solution into a hydrothermal tank with a tetrafluoroethylene liner and a volume of 20ml. The reaction solution accounts for about 50% of the total volume of the hydrothermal tank, which meets the requirements of the filling volume ratio of the hydrothermal tank. The heating rate is raised to 120°C, the holding time is 1.5h, and then cooled with the furnace. The microparticles are cleaned with a centrifuge, using alcohol solution, and the number of times of cleaning is 5 times. Baking at 40° C. until the sample is dry, the carbon...

Embodiment 2

[0043] Weigh 10ml of DMF and 10ml of deionized water and stir evenly to obtain a solvent. Weigh 2 mg of the purified carbon nanotubes, put the carbon nanotubes into a solvent and perform ultrasonication for 10 minutes to obtain a carbon nanotube dispersion. Weigh 200 mg of cobalt (II) acetate tetrahydrate, dissolve the cobalt (II) acetate tetrahydrate in a mixed solvent, and stir until completely dissolved. Put the above solution into a 50ml hydrothermal tank with a tetrafluoroethylene liner. The reaction solution accounts for about 40% of the total volume of the hydrothermal tank, which meets the requirements of the filling volume ratio of the hydrothermal tank. The heating rate is raised to 150°C, the holding time is 5h, and then cooled with the furnace. The microparticles are cleaned with a centrifuge, using alcohol solution, and the number of times of cleaning is 3 times. Bake at 80°C until the sample is dry to obtain a nano-cobalt tetraoxide composite material supported...

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Abstract

The embodiment of the invention discloses a carbon nano tube surface loaded nano cobaltosic oxide composite material and a preparation method thereof. The preparation method comprises the following steps: deionized water and DMF are weighed according to a ratio of 1:1 to 1:9 to obtain a mixed solvent; purified carbon nano tube and the mixed solvent are weighed according to the compounding concentration of 0.1-1g / L, and ultrasonic processing is performed for 10-60min; cobalt(II) acetate tetrahydrate of which the concentration is 10-60g / L relative to carbon nano tube dispersion liquid is weighed, and cobalt(II) acetate tetrahydrate is dispersed in the carbon nano tube dispersion liquid and stirred evenly; the obtained mixed solution is put in a hydrothermal tank with a tetrafluoroethylene liner and then cooled along with a furnace; after the solution is cooled to room temperature, black deposits are cleaned by a centrifuge; and baking is performed until a sample is dried. Co3O4 particles of the carbon nano tube surface loaded nano cobaltosic oxide composite material prepared by the method are cubic and uniform in size, have a side length smaller than 7nm, and are uniformly distributed on the surface of the carbon nano tube.

Description

technical field [0001] The invention belongs to the field of nanocomposite materials, and relates to a carbon nanotube surface-loaded nano cobalt tetroxide (Co 3 o 4 ) composite material and preparation method thereof, the composite material can be used for catalysis, supercapacitor or lithium ion battery electrode. Background technique [0002] Cobalt tetroxide Co 3 o 4 It is an important inorganic material and has great application prospects in the fields of electrochemistry, catalysts, magnetic fluids, and biomedicine. By preparing nano-Co 3 o 4 can significantly increase the Co 3 o 4 activity, thereby increasing the Co 3 o 4 performance in various fields. But Nano Co 3 o 4 Agglomeration is easy to occur, and it is usually necessary to coat nanomaterials on specific carrier materials, so as to achieve the purpose of improving the activity and stability of nanomaterials. Carbon nanotubes (CNT) have stable chemical properties and have excellent electrical, ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/24H01G11/26H01G11/36H01G11/86H01M4/1393H01M4/1391H01M4/131B82Y30/00B82Y40/00
CPCY02E60/10
Inventor 徐军明胡晓萍崔佳冬郑梁宋开新武军秦会斌
Owner 杭州中盟智控科技集团有限公司
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