Method for preparing three-dimensional hierarchical porous carbon

A technology of hierarchical porous carbon and carbon source, applied in the direction of carbon preparation/purification, nanotechnology, etc., to achieve the effect of simple preparation process, low cost and simple equipment

Inactive Publication Date: 2012-10-10
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

(Angewandte Chemie International Edition, Volume 47, Issue 2, Pages 373 – 376) However, the industrialization of the preparation method of hierarchical porous carbon still faces many challenges

Method used

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  • Method for preparing three-dimensional hierarchical porous carbon
  • Method for preparing three-dimensional hierarchical porous carbon
  • Method for preparing three-dimensional hierarchical porous carbon

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Preparation of 3D hierarchical porous carbon. Weigh 3.88g resorcinol and 5.2ml formaldehyde, mix and stir for 1 hour, add 15ml deionized water, mix and stir for 2 hours to form a uniform mixed solution as the carbon source precursor solution. Weigh 10g of tetraethyl orthosilicate, 5g of ethanol, 5g of deionized water, 1g of hydrochloric acid (1mol / L) and mix well, then stir and mix with the carbon source precursor solution. Take 10 g of dried hollow polystyrene microsphere colloidal crystals and place them in a beaker, slowly add the above-mentioned carbon source-silicon source mixed solution to the beaker until the solution is close to the top of the colloidal crystals, then seal it, and place it at room temperature for 48 hours. until the gel is complete. Remove the part without colloidal crystals in the gel, dry at 75°C, then put the product into a high-temperature atmosphere furnace, pass in argon gas at a rate of 0.1L / min, raise the temperature to 105°C at a rate ...

Embodiment 2

[0024] Preparation of 3D hierarchical porous carbon. Weigh 7.76g resorcinol and 11ml formaldehyde, mix and stir for 1 hour, add 15ml deionized water, mix and stir for 2 hours to form a uniform mixed solution as the carbon source precursor solution. Weigh 10g of tetraethyl orthosilicate, 5g of ethanol, 5g of deionized water, 1g of hydrochloric acid (1mol / L) and mix well, then stir and mix with the carbon source precursor solution. Take 10 g of dry hollow polystyrene microsphere colloidal crystals and place them in a beaker, slowly add the above-mentioned carbon source-silicon source mixed solution to the beaker until the solution is close to the top of the colloidal crystals, then seal it, and place it at room temperature for 60 hours. until the gel is complete. Remove the part without colloidal crystals in the gel, dry at 60°C, then put the product into a high-temperature atmosphere furnace, pass in argon gas at a rate of 0.1L / min, raise the temperature to 100°C at a rate of ...

Embodiment 3

[0026] Preparation of 3D hierarchical porous carbon. Weigh 7.76g resorcinol and 11ml formaldehyde, mix and stir for 1 hour, add 30ml deionized water, mix and stir for 1 hour, add 15ml deionized water, mix and stir for 2 hours to form a uniform mixed solution as the carbon source precursor solution. Weigh 10g of tetraethyl orthosilicate, 5g of ethanol, 5g of deionized water, 1g of hydrochloric acid (1mol / L) and mix well, then stir and mix with the carbon source precursor solution. Take 10 g of dried hollow polystyrene microsphere colloidal crystals and place them in a beaker, slowly add the above-mentioned carbon source-silicon source mixed solution to the beaker until the solution is close to the top of the colloidal crystals, then seal it, and place it at room temperature for 48 hours. until the gel is complete. Remove the part without colloidal crystals in the gel, dry at 65°C, then put the product into a high-temperature atmosphere furnace, pass in argon gas at a rate of 0...

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Abstract

The invention belongs to the field of synthesis of inorganic nano materials, and in particular relates to a method for preparing hierarchical porous carbon. The three-dimensional hierarchical porous carbon is prepared by using resorcinol, formaldehyde, ethyl orthosilicate, ethanol, deionized water, hydrochloric acid and hollow polystyrene microspheres as raw materials. The preparation method is characterized in that a carbon material with a reverse opal structure is efficiently obtained by using the polystyrene microspheres with hollow structures, carbon nano particles with mesopores are formed in ordered macropores, micropores are obtained by activation of carbon dioxide, and the three-dimensional hierarchical porous material is finally obtained. The porous carbon is provided with regularly arranged macropores with the diameters of 100 nanometers, mesopores with the diameters of about 8 nanometers and micropores with the diameters of less than 2 nanometers. The structure of the pores can be controlled by controlling the particle size of template microspheres and the concentration of a carbon source precursor solution. Equipment for the method is simple; the raw materials are common chemical raw materials, so the cost is low; and the preparation method is simple and beneficial to large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of synthesis of inorganic nanometer materials, and in particular relates to a preparation method of hierarchical porous carbon. technical background [0002] Carbon materials, due to their large specific surface area, large pore volume, and good chemical inertness, have been widely used in many fields, especially in energy storage materials. The development of porous carbon materials with high energy and high power density under high rate conditions is one of the leading research directions in the field of energy carbon materials. The most critical of these is a supercapacitor with a porous carbon material as the electrode body. However, the energy density and power density of the currently reported porous carbon materials usually decay rapidly under high-rate conditions, and it is difficult to meet the urgent needs of high energy / high power density for supercapacitors such as electric vehicles. Porous carbon mater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B82Y40/00C01B32/05
Inventor 巨新黄妙逢姜晓萍
Owner UNIV OF SCI & TECH BEIJING
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