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Preparation method of hierarchical porous carbon particles based on phase inversion

A technology of multi-level pores and particles, applied in the preparation/purification of carbon, etc., can solve the problems of difficult industrial mass production, unfavorable practical application, harsh operating conditions, etc., and achieve adjustable size and shape, low equipment requirements, and easy particle formation Effect

Pending Publication Date: 2021-08-03
CHINA JILIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this type of preparation method, the organic compound as the carbon source is first mixed with the template agent by impregnation, and then the porous carbon is obtained through steps such as polymerization, carbonization, removal of the hard template, and activation. The steps are cumbersome, the preparation takes a long time, and the template Removal of solvents usually requires acidic or alkaline conditions, the operating conditions are harsh, and it is difficult to promote industrial batch production
In addition, the hierarchical porous carbon materials prepared by such methods are usually in the form of powder, which is not conducive to practical application

Method used

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  • Preparation method of hierarchical porous carbon particles based on phase inversion
  • Preparation method of hierarchical porous carbon particles based on phase inversion
  • Preparation method of hierarchical porous carbon particles based on phase inversion

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specific Embodiment 1

[0020] Specific embodiment 1: a kind of preparation method of hierarchical porous carbon particles, as attached figure 1 shown. The phenolic resin-ethanol solution is dropped into the water-ethanol mixed solvent, the phenolic resin solidifies with water to form granules, and is cultivated until the granules are completely solidified, then dried and carbonized to obtain the product. Concrete steps are as follows: (1) 4g phenolic resin and 1g dehydrated alcohol are added in the beaker and stirred 30min, form uniform phenolic resin-ethanol solution; 4g of pure water and 2g of absolute ethanol) in a petri dish. Since phenolic resin is insoluble in water, it solidifies in water to form spherical particles, and it is incubated at 40°C for 12 hours to obtain pale pink porous phenolic resin particles, such as figure 2 (3) Take out the phenolic resin particles and dry them in a constant temperature oven at 100°C for 2 hours; (4) Move the phenolic resin particles into a crucible and ...

specific Embodiment 2

[0021] Specific embodiment 2: a kind of preparation method of hierarchical porous carbon particles, as attached figure 1 shown. The phenolic resin-ethanol solution is dropped into the water-ethanol mixed solvent, the phenolic resin solidifies with water to form granules, and is cultivated until the granules are completely solidified, then dried and carbonized to obtain the product. The specific steps are as follows: (1) 16g phenolic resin and 4g absolute ethanol are added in the beaker and stirred for 30min to form a uniform phenolic resin-ethanol solution; mixed with pure water and 5g of absolute ethanol) in a petri dish. Since phenolic resin is insoluble in water, it solidifies in water to form spherical particles, and cultures at 40°C for 12 hours to obtain pale pink porous phenolic resin particles; (3) Take out the phenolic resin particles and dry them in a constant temperature oven at 100°C for 3 hours (4) Move the phenolic resin granules into the crucible, place them i...

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Abstract

The invention discloses a preparation method of a hierarchical porous carbon block material based on phase inversion, and belongs to the technical field of carbon material preparation. Phenolic resin is used as a carbon source and dissolved in an ethanol solvent to prepare a uniform solution, and then the solution is dropwise added into a water-ethanol mixed solvent for standing culture. Because the phenolic resin is insoluble in water, the phenolic resin is gradually cured in a water-ethanol mixed solvent to form porous particles. The obtained phenolic resin particles are dried, and high-temperature carbonization is performed in a nitrogen atmosphere to directly obtain the granular hierarchical porous carbon. In the process of preparing the hierarchical porous carbon by the method, the use of reagents such as acid and alkali is avoided, the block hierarchical porous carbon material with adjustable particle shape and size can be directly prepared, the preparation condition is mild, the time consumption is short, the operation is simple, and the potential of large-scale production is realized.

Description

technical field [0001] The invention relates to a mild preparation method of hierarchical porous carbon particles based on a phase inversion method, belonging to the technical field of carbon material preparation. [0002] technical background [0003] Hierarchical carbon is one of the porous carbon materials, and its pore structure is composed of two or more pores with different pore sizes, such as microporous-mesoporous carbon, mesoporous-macroporous carbon, etc. This type of material has the characteristics of different pore structures, usually has a large specific surface area, small mass transfer resistance, and good stability. It has significant advantages in the fields of adsorption, catalysis, and electrode materials, and has a broad application prospect. [0004] The existing preparation method of hierarchical porous carbon is mainly based on the template method, which usually requires the use of two different templates to form pore structures of different sizes, inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05
CPCC01B32/05
Inventor 徐立恒蔡杭安王昱皓
Owner CHINA JILIANG UNIV
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