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Method for preparing porous carbon material by using non-nano zinc oxide or zinc hydroxide and porous carbon material

A porous carbon material, nano-zinc oxide technology, applied in the direction of nano-carbon, etc., can solve problems such as strong corrosion

Inactive Publication Date: 2021-08-03
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the pore structure of the porous carbon synthesized by this method is mostly micropores, and KOH is highly corrosive to equipment at high temperatures, so certain requirements have been put forward for the corrosion resistance of production equipment and protective measures for production personnel.

Method used

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  • Method for preparing porous carbon material by using non-nano zinc oxide or zinc hydroxide and porous carbon material
  • Method for preparing porous carbon material by using non-nano zinc oxide or zinc hydroxide and porous carbon material
  • Method for preparing porous carbon material by using non-nano zinc oxide or zinc hydroxide and porous carbon material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] a. Weigh 2g of glucose and 2.7g of common commercial non-nanometer zinc oxide, and ball mill for 10 minutes at a speed of 100 rpm to obtain a uniform solid powder;

[0064] b. Transfer A in step a to a quartz crucible, put it in a tube furnace, and then pass nitrogen as a protective gas to raise the temperature of the tube furnace to 500 °C at a rate of 5 °C / min, then cool naturally to room temperature and grind Get B evenly;

[0065] c. B in step b is washed and dried with an aqueous acid solution to obtain a porous carbon-carbon material;

[0066] figure 1 It is a scanning electron micrograph of common commercial non-nanometer zinc oxide used in the embodiment of the present invention 1;

[0067] figure 2 The scanning electron micrograph of the porous carbon nanomaterial prepared for Example 1 of the present invention;

[0068] image 3 Nitrogen adsorption and desorption curves and pore size distribution diagrams of porous carbon nanomaterials prepared in Exampl...

Embodiment 2

[0079] a. Weigh 2g of glucose and 3.6g of common commercial non-nanometer zinc oxide into a mortar, and grind for 10min with a grinding pestle to obtain a uniform solid powder;

[0080] b. Transfer the solid powder in step a to a quartz crucible, put it in a tube furnace, and then pass nitrogen as a protective gas to raise the temperature to 1000°C at a rate of 5°C / min and keep it for 2h, and then naturally cool to room temperature to obtain Porous carbon materials;

[0081] Figure 7 It is a scanning electron micrograph of the porous carbon material obtained by grinding and mixing glucose and common commercial non-nanometer zinc oxide in Example 2 of the present invention;

[0082] Figure 8 It is the nitrogen adsorption-desorption curve and pore size distribution diagram of the porous carbon material obtained by grinding and mixing glucose and common commercial non-nanometer zinc oxide in Example 2 of the present invention.

[0083] Depend on Figure 7 and Figure 8 It ...

Embodiment 3

[0085] a. Disperse 2g of glucose and 2.7g of common commercial non-nanometer zinc oxide in 50mL of water, stir for 5h and then perform rotary evaporation to remove the solvent to obtain mixture A;

[0086] b. Transfer A in step a to a quartz crucible, put it in a tube furnace, and then pass nitrogen as a protective gas to raise the temperature of the tube furnace to 500 °C at a rate of 5 °C / min and keep it for 2 hours, then naturally cool to room temperature Grind evenly to obtain B;

[0087] c. B in step b is washed with an aqueous acid solution and then dried to obtain a porous carbon-carbon material;

[0088] Figure 9 It is a scanning electron micrograph of the porous carbon material obtained by mixing glucose and common commercial non-nanometer zinc oxide in the liquid phase in Example 3 of the present invention;

[0089] Figure 10 It is the nitrogen adsorption-desorption curve and pore size distribution diagram of the porous carbon material obtained from glucose and ...

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Abstract

The invention provides a method for preparing a porous carbon material by using non-nano zinc oxide or zinc hydroxide and the porous carbon material. The method comprises the following steps: a carbon precursor and a non-nano pore forming agent are fully mixed, and a mixture is obtained; the non-nano pore forming agent is selected from non-nano zinc oxide or non-nano zinc hydroxide; in an inert atmosphere, the mixture is carbonized at a temperature higher than 800 DEG C to obtain the porous carbon material; or the mixture is carbonized at the temperature lower than 800 DEG C, pickled and dried to obtain the porous carbon material. According to the method provided by the invention, a prefabricated nano-sized template agent is not needed, common non-nano zinc oxide or zinc hydroxide is directly adopted, in the heating process, nano-particles generated in situ by the non-nano pore-forming agent are used as the template agent for pore-forming, the nano-particles and the carbon base are subjected to carbon thermal reduction reaction at high temperature to generate metal simple substance evaporation for further pore forming, subsequent etching is avoided, and the obtained porous carbon is large in specific area, high in porosity and wide in pore size distribution.

Description

technical field [0001] The invention belongs to the technical field of porous carbon materials, and in particular relates to a method for preparing porous carbon materials by using non-nanometer zinc oxide or zinc hydroxide and the porous carbon materials. Background technique [0002] Porous carbon materials are widely used in many fields such as energy storage and conversion, gas storage, heterogeneous catalysis, and water treatment due to their good thermodynamic stability, high chemical stability, strong electrical conductivity, well-developed pore structure and high surface area. The commonly used methods for preparing porous carbon materials mainly include template method, activation method and sol-gel method. [0003] The template method is divided into a hard template method and a soft template method. The hard template method is to use a prefabricated nano-sized template (silica, zeolite, alumina, magnesia, etc.) Alkali etching treatment finally obtains a porous ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15
CPCC01B32/15
Inventor 梁海伟张乐乐童磊
Owner UNIV OF SCI & TECH OF CHINA
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