Preparation method of porous carbon and prepared porous carbon

A porous carbon and carbon source technology, applied in the field of porous carbon, can solve the problems of increasing the crushing process and destroying the macroporous structure of the material, so as to achieve the effect of eliminating the spheroidization and crushing process

Pending Publication Date: 2022-04-22
HUNAN SHINZOOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Carbon materials synthesized by polymerization and chemical vapor deposition (CVD) need to be pulverized to obtain micron-sized particles, which not only needs to increase the pulverization process, but also seriously damages the unique macroporous structure of the material itself.

Method used

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  • Preparation method of porous carbon and prepared porous carbon

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Embodiment 1

[0050] This embodiment provides a preparation method of porous carbon, the preparation method comprising:

[0051] (1) Add polymer monomer MMA to deionized water, the molar ratio of deionized water to MMA is 13.7:1, mix and stir at 300r / min, heat up to 60°C and pass nitrogen gas for 20min, add after the temperature is stable The initiator potassium persulfate of 0.05g / L, reacts 3h to obtain described PMMA emulsion;

[0052] (2) PMMA emulsion is mixed with phenolic resin to obtain mixed precursor solution, the concentration of PMMA emulsion in the mixed precursor solution is 1wt%, mixed precursor solution is fed through the atomizing disk of 10000r / min rotating speed with the flow rate of 1kg / h , spray drying at 150°C to obtain a porous carbon precursor;

[0053] (3) The porous carbon precursor is heated up to 600° C. at a heating rate of 1° C. / min, and carbonized for 5 hours to obtain the porous carbon.

Embodiment 2

[0055] This embodiment provides a preparation method of porous carbon, the preparation method comprising:

[0056] (1) Add polymer monomer MMA to deionized water, the molar ratio of deionized water to MMA is 18.7:1, mix and stir at 300r / min, raise the temperature to 65°C and pass nitrogen gas for 23min, add after the temperature is stable The initiator potassium persulfate of 0.1g / L, reacts 2.5h to obtain described PMMA emulsion;

[0057] (2) PMMA emulsion is mixed with phenolic resin to obtain mixed precursor solution, the concentration of PMMA emulsion in the mixed precursor solution is 5wt%, mixed precursor solution is fed through the atomizing disk of 15000r / min rotating speed with the flow rate of 5kg / h , spray-dried at 180°C to obtain a porous carbon precursor;

[0058] (3) The porous carbon precursor is heated up to 700° C. at a heating rate of 3° C. / min, and carbonized for 4 hours to obtain the porous carbon.

Embodiment 3

[0060] This embodiment provides a preparation method of porous carbon, the preparation method comprising:

[0061] (1) Add polymer monomer MMA to deionized water, the molar ratio of deionized water to MMA is 25:1, mix and stir at 350r / min, heat up to 70°C and pass nitrogen gas for 25min, add after the temperature is stable The initiator potassium persulfate of 0.2g / L, reacts 2h to obtain described PMMA emulsion;

[0062] (2) PMMA emulsion and phenolic resin are mixed to obtain mixed precursor solution, the concentration of PMMA emulsion in the mixed precursor solution is 10wt%, mixed precursor solution is fed through the atomizing disc of 20000r / min rotating speed with the flow rate of 10kg / h , spray-dried at 200°C to obtain a porous carbon precursor;

[0063] (3) The porous carbon precursor is heated up to 800° C. at a heating rate of 5° C. / min, and carbonized for 3 hours to obtain the porous carbon.

[0064] The electron micrograph of the porous carbon prepared in this emb...

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Abstract

The invention provides a porous carbon preparation method, which comprises: mixing a template emulsion and a carbon source, carrying out spray drying to obtain a porous carbon precursor, and carbonizing the porous carbon precursor to obtain the porous carbon. According to the invention, a soft template and a spray drying process are combined, and the spherical porous carbon with a uniform macroporous structure is synthesized. A soft template is directly removed through a carbonization process, and micron-sized spherical particles can be directly obtained through spray drying, so that spheroidizing and crushing processes are omitted, and meanwhile, the original pore diameter structure of porous carbon is reserved.

Description

technical field [0001] The invention belongs to the technical field of porous carbon preparation, and relates to a method for preparing porous carbon and the prepared porous carbon. Background technique [0002] Owing to their unique properties, porous carbon materials have broad applications as Li-ion electrode materials, catalysis, drug loading, adsorption, and other applications. According to IUPAC regulations, porous carbon materials can be divided into the following three types based on their pore sizes: micropores < 2 nm, 2 nm < mesopores < 50 nm, and macropores > 50 nm. [0003] Among them, the preparation method of porous carbon with macroporous structure is mainly the template method, and the conventional steps for the synthesis of porous carbon by template method include: (1) preparation of carbon precursor / template composite, (2) carbonization and removal of template. According to different types of templates, templates can be divided into hard templa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05B01J2/04
CPCC01B32/05B01J2/04
Inventor 宋豫龙李能王志勇王玉华
Owner HUNAN SHINZOOM TECH
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