A porous bio-carbon material, a preparation method and application thereof

Porous biocarbon materials were prepared by cross-linking sodium pyrophosphate with starch and doping with phytic acid, combined with sodium chloride template and a two-stage calcination process. This solved the problems of adsorption capacity and cycle stability of porous carbon materials in carbon dioxide capture, and achieved efficient carbon dioxide capture and long service life.

CN122444178APending Publication Date: 2026-07-24FANGXING HEBEI NEW MATERIAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FANGXING HEBEI NEW MATERIAL TECH CO LTD
Filing Date
2026-06-02
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Existing porous carbon materials suffer from insufficient adsorption capacity, poor cycle stability, and easy structural collapse during carbon dioxide capture, making it difficult to scale up their industrial applications.

Method used

A robust framework was constructed by cross-linking sodium pyrophosphate with starch, and a macroporous structure was built by combining phytic acid doping and sodium chloride template. Micropores and chemically active sites were formed through a two-stage calcination process, which improved the adsorption capacity and cycle stability of the material.

Benefits of technology

It achieves high specific surface area and excellent cycling stability, ensuring that the material maintains high adsorption capacity and structural integrity during long-term use, thus solving the performance bottleneck in the existing technology.

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Abstract

The present application relates to the technical field of material preparation, and discloses a porous biological carbon material, a preparation method thereof and an application thereof. The preparation method of the porous biological carbon material comprises the following steps: adding starch, sodium pyrophosphate and phytic acid into water to obtain a paste solution; adding sodium chloride into the paste solution, freezing, and then drying under the conditions of a vacuum degree of 0.005-0.01 MPa and a temperature of-50 to-45 DEG C to obtain a porous biological carbon material precursor; performing first roasting on the porous biological carbon material precursor at a temperature of 280-320 DEG C, washing with water, and drying; and then performing second roasting at a temperature of 650-700 DEG C to obtain the porous biological carbon material. The preparation method of the porous biological carbon material is optimized, starch is used as a carbon source, sodium pyrophosphate and phytic acid are used for synergistic crosslinking, sodium chloride is used for freezing and pore induction, and two-step gradient roasting is performed, so that the adsorption capacity of the porous biological carbon material for carbon dioxide and the cyclic stability of the porous biological carbon material are significantly improved.
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