Method for preparing carbon nanosphere with hierarchical pore high graphitization degree

A technology of carbon nanospheres and high graphite, applied in the field of preparation of carbon nanospheres, can solve the problems of poor electrical conductivity, waste of carbon spheres, and low degree of graphitization of carbon nanospheres, and achieve simple preparation methods, low processing temperatures, and simple procedures Effect

Inactive Publication Date: 2017-10-24
中国科学院苏州纳米技术与纳米仿生研究所南昌研究院
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when carbon spheres are used as electrode materials, the pores that can be used are only on the outer surface of carbon spheres, and the spatial structure of the inner surface of carbon spheres cannot be fully utilized; even in catalytic reactions, carbon spheres are used as nano-metal oxide carriers. At that time, only the surface of carbon spheres can be used in the structure of carbon spheres, which inevitably leads to the waste of carbon spheres. For example, Haoyong Yin et al. published in the paper on pages 1018-1023 of Sensors and Actuators B 222 in 2016 , using carbon spheres as Cu/Cu 2 O carrier, but the internal structure of carbon spheres has not been fully u

Method used

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  • Method for preparing carbon nanosphere with hierarchical pore high graphitization degree
  • Method for preparing carbon nanosphere with hierarchical pore high graphitization degree
  • Method for preparing carbon nanosphere with hierarchical pore high graphitization degree

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Effect test

Embodiment 1

[0019] A method for preparing carbon nanospheres with hierarchical pores and high degree of graphitization, characterized in that the method steps are as follows:

[0020] (1) Using glucose and other biomass materials as raw materials, using nickel salt or cobalt salt as pore-forming agent and graphitization catalyst;

[0021] (2) Take 2g of glucose or starch, 4g of nickel nitrate or cobalt nitrate, 0.1g of anionic surfactant sodium dodecylbenzenesulfonate or sodium dodecyl sulfate, put in 30g of water, and stir ultrasonically until uniformly dispersed;

[0022] (3) Then put the above dispersion into a hydrothermal reaction kettle and react at 220°C for 8 hours;

[0023] (4) Repeatedly washing the amorphous carbon spheres after the hydrothermal reaction with alcohol and distilled water, and drying;

[0024] (5) Put the dried amorphous carbon material into a heating furnace, and heat-treat at 900°C for 3 hours in a nitrogen protective atmosphere;

[0025] (6) Wash the above s...

Embodiment 2

[0028] A method for preparing carbon nanospheres with hierarchical pores and high degree of graphitization, characterized in that the method steps are as follows:

[0029] (1) Using glucose and other biomass materials as raw materials, using nickel salt or cobalt salt as pore-forming agent and graphitization catalyst;

[0030] (2) Take 2g of glucose or starch, 6g of nickel nitrate or cobalt nitrate, 0.1g of anionic surfactant sodium dodecylbenzenesulfonate or sodium dodecylsulfate, put in 30g of water, and ultrasonically stir until uniformly dispersed;

[0031] (3) Then put the above dispersion into a hydrothermal reaction kettle and react at 220°C for 8 hours;

[0032] (4) Repeatedly washing the amorphous carbon spheres after the hydrothermal reaction with alcohol and distilled water, and drying;

[0033] (5) Put the dried amorphous carbon material into a heating furnace, and heat-treat at 900°C for 3 hours in a nitrogen protective atmosphere;

[0034] (6) Wash the above sa...

Embodiment 3

[0037] A method for preparing carbon nanospheres with hierarchical pores and high degree of graphitization, characterized in that the method steps are as follows:

[0038] (1) Using glucose and other biomass materials as raw materials, using nickel salt or cobalt salt as pore-forming agent and graphitization catalyst;

[0039] (2) Take 2g of glucose or starch, 8g of nickel nitrate or cobalt nitrate, 0.1g of anionic surfactant sodium dodecylbenzenesulfonate or sodium dodecylsulfate, put in 30g of water, and stir ultrasonically until uniformly dispersed;

[0040] (3) Then put the above dispersion into a hydrothermal reaction kettle and react at 220°C for 8 hours;

[0041] (4) Repeatedly washing the amorphous carbon spheres after the hydrothermal reaction with alcohol and distilled water, and drying;

[0042] (5) Put the dried amorphous carbon material into a heating furnace, and heat-treat at 900°C for 3 hours in a nitrogen protective atmosphere;

[0043] (6) Wash the above sa...

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Abstract

The invention discloses a method for preparing a carbon nanosphere with a hierarchical pore high graphitization degree. The method comprises the following steps: (1) uniformly stirring and mixing glucose and other biologic materials, a nickel salt or a cobalt salt and an anionic surfactant in distilled water, adding the mixture into a hydrothermal reactor, and heating and maintaining the temperature for a certain time; (2) adding the obtained amorphous carbon material into a heating furnace in nitrogen protection, and heating and maintaining the temperature for a certain time; and (3) cleaning the obtained carbon material with dilute acid, and finally cleaning with distilled water and drying, thereby obtaining the finished product. The carbon sphere prepared by the method disclosed by the invention is low in cost, readily available, adjustable in diameter, high in porosity, adjustable in quantity and size of pores, high in graphitization degree and high in conductivity.

Description

technical field [0001] The invention relates to a preparation method of carbon nanospheres, in particular to a preparation method of carbon nanospheres with hierarchical holes and high graphitization degree. Background technique [0002] Most of the current carbon electrode materials are graphite and activated carbon. Although graphite has good conductivity, it has low porosity and low adsorption efficiency; although activated carbon has high porosity, it has poor conductivity because it is an amorphous carbon material, and activated carbon Most of the pores in the activated carbon are micropores. In the organic electrolyte, the electrolyte molecules are relatively large, and the pores of activated carbon cannot be fully utilized. [0003] Carbon spheres have the advantages of adjustable diameter and simple preparation. However, when carbon spheres are used as electrode materials, the pores that can be used are only on the outer surface of carbon spheres, and the spatial st...

Claims

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Application Information

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IPC IPC(8): C01B32/15C01B32/205B82Y30/00
CPCB82Y30/00C01P2002/72C01P2004/32
Inventor 张永毅冯智富
Owner 中国科学院苏州纳米技术与纳米仿生研究所南昌研究院
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