A macroscopic preparation method of a porous graphene-based two-dimensional sheet material

By employing interfacial polymerization and dialysis processes, the challenge of large-scale preparation of porous graphene-based two-dimensional sheet materials has been solved, enabling the efficient and low-cost preparation of such materials and enhancing their application potential in energy storage, membrane separation, and electrocatalysis.

CN118145629BActive Publication Date: 2026-06-02TIANJIN POLYTECHNIC UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TIANJIN POLYTECHNIC UNIV
Filing Date
2024-02-22
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing technologies make it difficult to achieve large-scale preparation of porous graphene-based two-dimensional sheet materials. Furthermore, the preparation process is complex, costly, and has poor pore size uniformity, which affects their application in energy storage, membrane separation, and electrocatalysis.

Method used

A large-scale preparation of porous graphene-based two-dimensional sheet materials was achieved by using graphene quantum dots as aqueous monomers and polyacrylamide chlorides as organic monomers for interfacial polymerization. By controlling the pH value and extending the polymerization time, combined with dialysis and freeze-drying processes, the materials were prepared.

Benefits of technology

This study achieved efficient separation and purification of porous graphene-based two-dimensional sheet materials, improving yield and purity, simplifying the preparation process, reducing costs, and expanding their application potential in energy storage, membrane separation, and electrocatalysis.

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Abstract

This invention discloses a method for the large-scale preparation of porous graphene-based two-dimensional sheet materials. The method includes: S1, preparation of porous graphene-based two-dimensional sheet materials: graphene quantum dot aqueous solution and a polyacrylamide chloride organic solution are added sequentially to a reaction flask for interfacial polymerization, resulting in porous graphene-based two-dimensional sheet materials at the interface; S2, large-scale preparation: immediately following S1, the interfacial polymerization time is extended to 1-24 hours. By increasing the number of reaction flasks, the yield of porous graphene-based two-dimensional sheet materials is multiplied, achieving large-scale preparation. This invention utilizes graphene quantum dots as the main component and restricts the growth of porous graphene to a two-dimensional interface from bottom to top through free interfacial polymerization. Large-scale preparation is achieved by extending the interfacial polymerization time. From the initial synthesis stage to the reaction termination, the morphology and structure of the porous graphene-based two-dimensional sheet materials remain stable throughout, providing a new approach for the low-cost large-scale preparation of porous graphene-based two-dimensional sheet materials.
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