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Hollow carbon sphere with hierarchical pore structure and preparation method thereof

A pore structure and hollow technology, which is applied in the field of porous carbon materials, can solve the problems that there are no public reports on the preparation method of hollow carbon spheres with a multi-level pore structure, and achieve the effects of being beneficial to adsorption and transportation, wide application fields, and improving performance

Pending Publication Date: 2020-07-28
JINHUA CHENYANG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, there is no public report about the preparation method of hollow carbon spheres with hierarchical pore structure

Method used

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  • Hollow carbon sphere with hierarchical pore structure and preparation method thereof
  • Hollow carbon sphere with hierarchical pore structure and preparation method thereof
  • Hollow carbon sphere with hierarchical pore structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Take 0.5g graphene oxide and dissolve in 100ml ethanol to prepare a carbon source precursor solution with a concentration of 5g / L. Add 0.55 g of sodium nitrate to the carbon source precursor solution obtained above, mix and stir evenly to obtain a carbon source solution. The above carbon source solution was spray-dried at a temperature of 150° C., an air pressure of 0.07 bar, and a squeeze pump speed of 5 R / min to obtain a dried product. This was followed by pre-oxidation at 100°C for 10 hours. Finally, in an argon atmosphere, after calcining at 700° C. for 3 hours, a hollow carbon sphere with a multi-level pore structure is obtained.

[0046] figure 1 It is a SEM electron microscope characterization diagram of the hollow carbon sphere with a hierarchical pore structure prepared in Example 1 of the present invention. It can be seen that the morphology of the prepared particles is spherical, and its size is about 3.5 microns.

[0047] figure 2 It is the EDX element...

Embodiment 2

[0051] By the same operation as in Example 1, just adjust the carbon source concentration, specifically as follows:

[0052] Get 3g of graphene oxide and dissolve in 100ml of ethanol to prepare a carbon source precursor solution with a concentration of 30g / L. Add 11.4 g of sodium nitrate to the carbon source precursor solution obtained above, mix and stir evenly to obtain a carbon source solution. The above carbon source solution was spray-dried at a temperature of 150° C., an air pressure of 0.07 bar, and a squeeze pump speed of 5 R / min to obtain a dried product. This was followed by pre-oxidation at 100°C for 10 hours. Finally, in an argon atmosphere, after calcining at 700° C. for 3 hours, a hollow carbon sphere with a multi-level pore structure is obtained.

[0053] Figure 5 It is a SEM electron microscope characterization diagram of hollow carbon spheres with a hierarchical pore structure prepared in Example 2 of the present invention. It can be seen from the figure ...

Embodiment 3

[0055] By the same operation as in Example 1, just adjust the carbon source type, specifically as follows:

[0056] Dissolve 0.5 g of glucose in 100 ml of ethanol to prepare a carbon source precursor solution with a concentration of 5 g / L. Add 0.55 g of sodium nitrate to the carbon source precursor solution obtained above, mix and stir evenly to obtain a carbon source solution. The above carbon source solution was spray-dried at a temperature of 150° C., an air pressure of 0.07 bar, and a squeeze pump speed of 5 R / min to obtain a dried product. This was followed by pre-oxidation at 100°C for 10 hours. Finally, in an argon atmosphere, after calcining at 700° C. for 3 hours, a hollow carbon sphere with a multi-level pore structure is obtained.

[0057] Figure 6 It is a SEM electron microscope characterization diagram of hollow carbon spheres with a hierarchical pore structure prepared in Example 3 of the present invention. It can be seen that the morphology of the prepared ...

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Abstract

The invention relates to a hollow carbon sphere with a hierarchical pore structure, which is of a hierarchical pore structure and is provided with micropores, mesopores and macropores at the same time, wherein the pore diameter of the micropores is not greater than 2 nm, the pore diameter of the mesopores is 2-50 nm, and the pore diameter of the macropores is greater than 50 nm; the pore volume contributed by the micropores is 0.047-0.30 cm <3> / g, the pore volume contributed by the mesopores is 0.15-0.49 cm <3> / g, and the pore volume contributed by the macropores is 0.07-0.80 cm <3> / g. The particle size of the hollow carbon spheres is 2.5-6.5 [mu] m, the wall thickness is 5-8 nm, and the specific surface area is 443.23 m <2> / g. The invention also provides a preparation method of the material. The carbon spheres provided by the invention have the characteristics of thin wall, porosity, high specific surface area and the like, and the application performance can be enhanced. Meanwhile, the method is simple and controllable in steps, low in cost, suitable for industrial production and wide in application field.

Description

technical field [0001] The invention relates to the field of porous carbon materials, in particular to a hollow carbon sphere with a multi-level pore structure and a preparation method thereof. Background technique [0002] The use of carbon materials can be traced back to ancient times of mankind. Due to its high electrical conductivity, good thermal conductivity, good thermal stability, corrosion resistance, light weight, and diverse molecular structures, hollow carbon spheres are widely used in the fields of batteries, chemicals, machinery, electronics, aerospace, metallurgy, and nuclear energy. has a particularly wide range of applications. In recent years, with the discovery and development of carbon materials such as C60, carbon nanotubes and graphene, it has been found that their microstructure, such as pore size, has a decisive effect on the properties and uses of the material. It is generally stipulated that those whose channel size is less than 2 nanometers are m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C01B32/15B82Y30/00B82Y40/00
CPCC01B32/05C01B32/15B82Y30/00B82Y40/00
Inventor 陈忠伟
Owner JINHUA CHENYANG TECH CO LTD