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Preparation method of hollow carbon spheres and preparation method of cobalt-carbon spheres

A carbon sphere and hollow technology, applied in the field of materials, can solve the problems of expensive raw materials, long preparation time, difficult to control the size of cobalt-carbon spheres, etc., and achieve the effect of increasing yield

Inactive Publication Date: 2014-05-21
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method takes a long time to prepare, the yield is low, the raw material is expensive, and the most important thing is that the size of the cobalt-carbon spheres is not easy to control

Method used

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  • Preparation method of hollow carbon spheres and preparation method of cobalt-carbon spheres
  • Preparation method of hollow carbon spheres and preparation method of cobalt-carbon spheres
  • Preparation method of hollow carbon spheres and preparation method of cobalt-carbon spheres

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preparation example Construction

[0029] According to the present invention, the embodiment of the present invention first discloses a method for preparing hollow carbon spheres, including the following steps:

[0030] a) Melting and mixing plastics with one or two of recycled plastics, modified montmorillonite and cobalt compounds to obtain plastic mixtures or recycled plastic mixtures;

[0031] b) heating the plastic mixture or recycled plastic mixture, cooling after reaction to obtain a compound;

[0032] c) mixing the compound obtained in step b) with hydrofluoric acid, centrifuging after reaction, mixing the separated solid material with oxidizing acid, and obtaining hollow carbon spheres after reaction.

[0033] In the process of preparing hollow carbon spheres, the present application firstly melts and mixes one or two of plastics and recycled plastics, modified montmorillonite and cobalt compound to obtain a plastic mixture or a recycled plastic mixture. The present invention uses commercialized plast...

Embodiment 1

[0057] According to the weight ratio, 85%% polystyrene, 5% modified montmorillonite with a particle size of 0.5 microns, and 10% cobalt trioxide with a particle size of 0.5 microns were added to the internal mixer at the same time, and the mixture was mixed at 190 ° C and 70 rpm Melt mixing was carried out at 1 / min for 5 minutes to obtain a polystyrene mixture.

[0058] Take 10 grams of the above mixture and put it in a 30 ml crucible, and put a cover on the crucible. Heat the bottom of the crucible with the outer flame of a gas lamp. After a few seconds, the polymer starts to burn. At this time, the temperature inside the crucible was 500°C. After the polymer no longer burns, remove the crucible and cool it to room temperature in a cool place. At this time, 2.5 grams of cobalt-carbon sphere / montmorillonite composite with a core-shell structure was obtained, with a yield of 25%.

[0059] Add hydrofluoric acid with a mass concentration of 10% to the above black compound and...

Embodiment 2

[0061] 80% recycled polystyrene, 5% modified montmorillonite with a particle size of 40 microns, and 15% cobalt tetroxide with a particle size of 2 microns were added to the internal mixer at the same time by weight, at 180 ° C and 100 rpm Melt mixing was carried out for 10 minutes to obtain a polystyrene mixture.

[0062] Take 10 grams of the above mixture and put it in a 50 ml crucible, and put a cover on the crucible. Heat the bottom of the crucible with the outer flame of a gas lamp. After a few seconds, the polymer starts to burn. At this time, the temperature inside the crucible was 600°C. After the polymer no longer burns, remove the crucible and cool it to room temperature in a cool place. At this time, 3.8 grams of cobalt-carbon sphere / montmorillonite composite with core-shell structure were obtained, with a yield of 38%.

[0063]Add hydrofluoric acid with a mass concentration of 20% to the above black compound and let it stand for 36 hours. Black toner was obtai...

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Abstract

The invention provides a preparation method of hollow carbon spheres. The preparation method comprises the steps of a) fusing and mixing one or two of plastics and recycled plastics, modified montmorillonite and a cobalt compound to obtain a plastic mixture or a recycled plastic mixture, b) heating the plastic mixture or the recycled plastic mixture, reacting and cooling to obtain a compound, c) mixing the compound obtained in the step b) with hydrofluoric acid, reacting and centrifugally separating; mixing the separated solid material with an oxidizing acid, and reacting to obtain the hollow carbon spheres. The invention also provides a preparation method of cobalt-carbon spheres; the preparation process of the cobalt-carbon spheres is similar to the preparation process of the hollow carbon spheres, except that the step c) comprises mixing the compound with the aqueous solution of a strong base and reacting to obtain the cobalt-carbon spheres. The modified montmorillonite, the cobalt compound and the plastics are taken as the raw materials of reactions in the process of preparing the hollow carbon spheres or the cobalt-carbon spheres, and therefore, the yield of the prepared hollow carbon spheres or cobalt-carbon spheres is increased.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a method for preparing hollow carbon spheres and a method for preparing cobalt-carbon spheres. Background technique [0002] Hollow carbon spheres and cobalt-carbon spheres with a core-shell structure are a new type of carbon material. Hollow carbon spheres and cobalt-carbon spheres with a core-shell structure are characterized by diameters usually ranging from tens to hundreds of nanometers. [0003] Nano and micron hollow carbon spheres have good chemical stability, thermal stability, electrical conductivity, thermal conductivity, large specific surface area and low density, and are a kind of carbon material with broad application prospects. Due to the above-mentioned advantages of nanometer and micrometer hollow carbon spheres, they are widely used in industries such as loading catalysts, adsorbing pollutants, preparing supercapacitors and lithium-ion batteries. Synthesis ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02C01B32/05
Inventor 唐涛龚江陈青
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI