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Method for synthesizing high purity carbon nano-ball and carbon microsphere

A carbon nanosphere and carbon microsphere technology, applied in nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve the problems of low carbon content, low purity, and high equipment requirements, and achieve high carbon content and high purity. , the effect of reducing production costs

Inactive Publication Date: 2008-08-20
CENT SOUTH UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0007] The disadvantages of these methods are higher requirements for equipment, and the purity is not high, and the carbon content is lower than 95%.

Method used

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  • Method for synthesizing high purity carbon nano-ball and carbon microsphere
  • Method for synthesizing high purity carbon nano-ball and carbon microsphere
  • Method for synthesizing high purity carbon nano-ball and carbon microsphere

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Embodiment 1: take by weighing 25 grams of CaC 2 (0.39mol) was placed in a 120 milliliter stainless steel pressure-resistant reactor, and crushed to particles with a diameter of 1-2 mm, while adding 25 grams (0.195mol) of oxalic acid dihydrate, and sealed the reactor. The reaction kettle is heated by a heating device, and the heating temperature is controlled by a temperature control device at the same time. When the temperature in the kettle rises to 65-80°C, the temperature in the kettle begins to rise sharply, and the temperature in the kettle can rise to about 250°C in a short time. Turn off the power supply of the heating device at this time, and the reactor is cooled to room temperature. After opening the lid of the reaction kettle, the reaction product is clearly divided into two layers; the upper layer is a bright black flocculent soft product with a product volume of about 2 grams; the lower layer is a yellow-white solid powder. The upper product is identifie...

Embodiment 2

[0018] Embodiment 2: take by weighing 30 grams of CaC 2 (0.468mol) was placed in a 120 milliliter stainless steel pressure-resistant reactor, crushed to particles with a diameter of 1-2 mm, and 20 grams (0.158mol) of oxalic acid dihydrate was added at the same time, and the reactor was sealed. The reaction kettle is heated by a heating device, and the heating temperature is controlled by a temperature control device at the same time. When the temperature in the kettle rises to 65-80°C, the temperature in the kettle begins to rise sharply, and the temperature in the kettle can rise to about 250°C in a short time. Turn off the power supply of the heating device at this time, and the reactor is cooled to room temperature. After opening the lid of the reaction kettle, the reaction product is clearly divided into two layers; the upper layer is a bright black flocculent soft product with a product volume of about 2 grams; the lower layer is a yellow-white solid powder. The upper p...

Embodiment 3

[0019] Embodiment 3: take by weighing 36 grams of CaC 2 (0.56mol) was placed in a 120 milliliter stainless steel pressure-resistant reactor, crushed to particles with a diameter of 1-2 mm, and 18 grams (0.143mol) of oxalic acid dihydrate was added at the same time, and the reactor was sealed. The reaction kettle is heated by a heating device, and the heating temperature is controlled by a temperature control device at the same time. When the temperature in the kettle rises to 65-80°C, the temperature in the kettle begins to rise sharply, and the temperature in the kettle can rise to about 250°C in a short time. Turn off the power supply of the heating device at this time, and the reactor is cooled to room temperature. After opening the lid of the reaction kettle, the reaction product is clearly divided into two layers; the upper layer is a bright black flocculent soft product with a product volume of about 1.25 grams; the lower layer is a yellow-white solid powder. The upper...

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Abstract

The invention provides a method for synthesizing high-purity carbon nanospheres or carbon microspheres at low temperatures, which takes calcium carbide and oxalic acid dihydrate as raw materials, and the molar ratio of calcium carbide and oxalic acid dihydrate is 2: 1 to 6: 1. The raw materials are heated up to 65 to 250 DEG C in a closed pressure-withstanding reactor for 30 to 120 minutes, and then are cooled down to ambient temperature after the reaction is completed, so as to obtain carbon nanospheres and carbon microsphere, the diameter of which is from scores of nanometer to hundreds of nanometer. The carbon nanospheres and carbon microspheres obtained by the method of the invention have the advantages of high purity, high carbon content and uniform size.

Description

technical field [0001] The invention relates to a method for preparing carbon nanomaterials, especially high-purity carbon nanospheres and carbon microspheres. Background technique [0002] The 21st century is the century of nanomaterials. Carbon nanomaterials have attracted much attention due to their rich sources and variety of raw materials. Since the 1980s C 60 Since the discovery of carbon nanotubes and carbon nanotubes, research on carbon nanomaterials has been in full swing, while carbon nanospheres and carbon microspheres have been relatively less researched as a kind of carbon nanomaterials. Because of its unique physical, chemical, mechanical and electrical properties, carbon nanomaterials have broad and attractive potential application prospects. At present, due to the harsh synthesis conditions and high cost of carbon nanomaterials, their application fields are limited to a certain extent, and finding a low-cost method for synthesizing high-quality carbon nanom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82B3/00
Inventor 谢永贵黄启忠黄伯云
Owner CENT SOUTH UNIV
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