Cobalt-nitrogen-carbon core-shell hybridization hollow porous carbon sphere preparation method

A hollow porous, carbon core-shell technology, applied in metal processing equipment, coating, transportation and packaging, etc., can solve the problems of complex preparation process and achieve excellent electrocatalytic performance, high conductivity and good shape

Active Publication Date: 2017-06-13
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the template method (including soft template method and hard template method) is widely used in the preparation of hollow materials. Different templates can be selected to synthesize compounds with different structures, and the size of the template is easier to control so that the obtained carbon sphere structure and The size is easy to control, but with this method, in order to obtain hollow nanomaterials, the template must be removed eventually, which makes the preparation process relatively complicated, and a large amount of acid or alkali is required in the removal of the template, so how to simplify the process is very important. significance

Method used

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  • Cobalt-nitrogen-carbon core-shell hybridization hollow porous carbon sphere preparation method
  • Cobalt-nitrogen-carbon core-shell hybridization hollow porous carbon sphere preparation method
  • Cobalt-nitrogen-carbon core-shell hybridization hollow porous carbon sphere preparation method

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Effect test

Embodiment 1

[0027] The preparation method of cobalt-nitrogen-carbon core-shell hybrid hollow porous carbon spheres in this example is as follows:

[0028] 1. Add 0.36g of cobalt nitrate into a mixed solution of 23mL of glycerin and 67mL of isopropanol, stir for 0.5h and pour it into a 100mL reaction kettle, then raise the temperature of the reaction kettle from room temperature to 180°C and keep it warm for 6h, centrifuge and wash with ethanol , obtaining cobalt precursor spheres, the diameter of the cobalt precursor spheres being 200-500nm;

[0029] 2. Evenly disperse the cobalt precursor spheres obtained in step 1 in 50mL of deionized water, add 50mg of dopamine and 0.05g of cobalt chloride, stir at room temperature for 12h, centrifuge (8000rpm, 5min), and use deionized water to collect the solid After washing with water for 3 times and drying, the Co@PDA composite microspheres can be obtained;

[0030] 3. Put the Co@PDA composite microspheres prepared in step 2 in a tube furnace, rais...

Embodiment 2

[0033] The preparation method of cobalt-nitrogen-carbon core-shell hybrid hollow porous carbon spheres in this example is as follows:

[0034] 1. Add 0.36g of cobalt nitrate into a mixed solution of 23mL of glycerin and 67mL of isopropanol, stir for 0.5h and pour it into a 100mL reaction kettle, then raise the temperature of the reaction kettle from room temperature to 180°C and keep it warm for 6h, centrifuge and wash with ethanol , obtaining cobalt precursor spheres, the diameter of the cobalt precursor spheres being 200-500nm;

[0035] 2. Evenly disperse the cobalt precursor spheres obtained in step 1 in 50 mL of deionized water, add 100 mg of dopamine and 0.1 g of cobalt chloride, stir at room temperature for 12 h, centrifuge (8000 rpm, 5 min), and use deionized water to collect the solid After washing with water for 3 times and drying, the Co@PDA composite microspheres can be obtained;

[0036] 3. Put the Co@PDA composite microspheres prepared in step 2 in a tube furnace...

Embodiment 3

[0039] The preparation method of cobalt-nitrogen-carbon core-shell hybrid hollow porous carbon spheres in this example is as follows:

[0040] 1. Add 0.36g of cobalt nitrate into a mixed solution of 23mL of glycerin and 67mL of isopropanol, stir for 0.5h and pour it into a 100mL reaction kettle, then raise the temperature of the reaction kettle from room temperature to 180°C and keep it warm for 6h, centrifuge and wash with ethanol , obtaining cobalt precursor spheres, the diameter of the cobalt precursor spheres being 200-500nm;

[0041] 2. Evenly disperse the cobalt precursor spheres obtained in step 1 in 50 mL of deionized water, add 200 mg of dopamine and 0.16 g of cobalt chloride, stir at room temperature for 12 h, centrifuge (8000 rpm, 5 min), and use deionized water to collect the solid After washing with water for 3 times and drying, the Co@PDA composite microspheres can be obtained;

[0042] 3. Put the Co@PDA composite microspheres prepared in step 2 in a tube furnac...

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Abstract

The invention discloses a cobalt-nitrogen-carbon core-shell hybridization hollow porous carbon sphere preparation method which includes the steps: firstly, taking a cobalt precursor sphere and nitrogenous polymer monomer as raw materials, wrapping the surface of the cobalt precursor sphere with nitrogenous polymer by in-situ polymerization to obtain a Co@ nitrogenous polymer composite microsphere; secondly, annealing the prepared Co@ nitrogenous polymer composite microsphere in argon atmosphere to obtain a cobalt-nitrogen-carbon core-shell hybridization hollow porous carbon sphere. The cobalt-nitrogen-carbon core-shell hybridization hollow porous carbon sphere is provided with a porous structure and has a nano-scale particle size, high conductivity and excellent catalytic property. The method is simple and can be widely used for the electrochemical fields of super-capacitors, lithium ion batteries, electro-catalysis and the like, and the process is easily controlled.

Description

technical field [0001] The invention belongs to the technical field of carbon material manufacturing technology, and relates to a preparation method of cobalt-nitrogen-carbon core-shell hybrid hollow porous carbon spheres. Background technique [0002] Nanomaterials are excellent structural materials and can also be used as functional materials. They have unparalleled application prospects in military, commercial and civil applications. Nano-hollow carbon spheres have low density, large specific surface area, good intrinsic damping performance and biological Good compatibility and other advantages have potential application value in the fields of electricity, electrochemistry, biomedicine, etc. Therefore, the low-temperature, high-efficiency preparation and performance research of these materials have important theoretical significance and practical value. [0003] At present, the template method (including soft template method and hard template method) is widely used in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/02B22F9/24
CPCB22F9/24B22F1/17
Inventor 从怀萍辛欣
Owner HEFEI UNIV OF TECH
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