Method for preparing highly-graphitized hollow carbon nanocapsules by using low-temperature reaction

A hollow nano, low-temperature reaction technology, applied in the direction of nanotechnology, can solve the problems of low graphitization degree of hollow nano carbon spheres, low yield of hollow nano carbon spheres, complicated operation process, etc., to achieve low price, high yield, The effect of low reaction temperature

Inactive Publication Date: 2012-03-28
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] There have been many reports on the preparation methods of hollow nanocarbon spheres. The main technologies include: high-pressure shock compression fullerene method, laser thermal evaporation method, template method, solvothermal method, and direct reaction method. Some of these preparation methods require complex equipment, Some operations are complicated and some consume a lot of energy, but the degree of graphitization of the prepared hollow nano-carbon spheres is low, the size is not uniform, and the yield of the hollow nano-carbon spheres is low or only as a by-product, so it is difficult to generate simultaneously separated from other carbon materials

Method used

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  • Method for preparing highly-graphitized hollow carbon nanocapsules by using low-temperature reaction
  • Method for preparing highly-graphitized hollow carbon nanocapsules by using low-temperature reaction
  • Method for preparing highly-graphitized hollow carbon nanocapsules by using low-temperature reaction

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Effect test

Embodiment 1

[0029] Hollow carbon nanospheres were prepared by reacting calcium carbide and aluminum chloride hexahydrate. Weigh 11.0g of calcium carbide and 8.9g of aluminum chloride hexahydrate with a balance, and put them into a stainless steel reaction kettle. After the reaction kettle is tightly sealed, heat it in a heating furnace to about 500°C. After keeping the temperature for 5 hours, close the heating furnace to make the reaction The kettle was naturally cooled to room temperature in the furnace. The reaction product is divided into two layers, the upper layer is a spongy black substance, and the lower layer is a gray mixture. The product is washed with concentrated hydrochloric acid and deionized water. During the cleaning process, the black product floats on the liquid surface. The black powder obtained after drying for 8 hours was 2.11 g.

Embodiment 2

[0031] Nano-carbon hollow spheres were prepared by reacting calcium carbide and aluminum chloride hexahydrate. Weigh 11.0g of calcium carbide and 8.9g of aluminum chloride hexahydrate with a balance, and put them into a stainless steel reactor. After the reactor is sealed tightly, heat it in a heating furnace to about 250°C. After keeping the temperature for 5 hours, close the heating furnace to make the reaction The kettle was naturally cooled to room temperature in the furnace. The reaction product is divided into two layers, the upper layer is a spongy black substance, and the lower layer is a gray mixture. The product is washed with concentrated hydrochloric acid and deionized water. During the cleaning process, the black product floats on the liquid surface. The black powder obtained after drying for 6 hours was 0.41 g.

Embodiment 3

[0033] Nano-carbon hollow spheres were prepared by reacting calcium carbide and aluminum chloride hexahydrate. Weigh 11.0g of calcium carbide and 8.9g of aluminum chloride hexahydrate with a balance, and put them into a stainless steel reaction kettle. After the reaction kettle is tightly sealed, heat it in a heating furnace to about 250°C. After keeping the temperature for 1 hour, close the heating furnace to make the reaction The kettle was naturally cooled to room temperature in the furnace. The reaction product is divided into two layers, the upper layer is a spongy black substance, and the lower layer is a gray mixture. The product is washed with concentrated hydrochloric acid and deionized water. During the cleaning process, the black product floats on the liquid surface. The black powder obtained after drying for 8 hours was 0.32 g.

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Abstract

The invention relates to a method for preparing highly-graphitized hollow carbon nanocapsules by using a low-temperature reaction. The method comprises the following steps of: reacting carbon carbide with aluminum chloride hexahydrate for 2-5h at 250-500 DEG C; or reacting the carbon carbide with cobalt chloride hexahydrate for 2-5h at 250-500 DEG C to obtain solid nanocapsules; then mixing the solid nanocapsules with anhydrous aluminum chloride; and heating to 250-500 DEG C, preserving temperature and reacting for 4-5h. The method disclosed by the invention has the advantages of low reactiontemperature, short reaction time and low cost; and the prepared hollow nanocapsules have the advantages of uniform size, high graphitization degree, high purity and high yield.

Description

technical field [0001] The invention relates to a method for preparing hollow carbon spheres, in particular to a method for preparing large quantities of uniform-sized and highly graphitized hollow nano-carbon spheres by low-temperature reaction, and belongs to the technical field of inorganic non-metallic materials. Background technique [0002] Hollow nanocarbon spheres have special physical and chemical properties, such as unique hollow structure, low density, large specific surface area, and good heat insulation performance, so they have a wide range of application values, such as fuel cell electrodes and lithium-ion battery negative electrodes. , Supercapacitors, gas storage media, lubricants, catalyst carriers, electrochemical sensors, drug delivery devices, templates for preparing other hollow structures, etc. [0003] There have been many reports on the preparation methods of hollow nanocarbon spheres. The main technologies include: high-pressure shock compression fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y40/00
Inventor 白玉俊刘瑞伦宁亓永新
Owner SHANDONG UNIV
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