Amine-modified MOFs derived porous carbon as well as preparation method and application thereof

By preparing amine-modified MOFs-derived porous carbon materials, the problem of treating low-concentration hydrogen fluoride gas was solved, achieving efficient and stable adsorption effects, which are suitable for industrial purification in the lithium battery industry.

CN121317698APending Publication Date: 2026-01-13SHENZHEN TIANDEYI ENVIRONMENT TECH
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202511556739.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-29
Publication Date
2026-01-13

AI Technical Summary

Technical Problem

Existing technologies are insufficient for efficiently treating low-concentration hydrogen fluoride gas. Traditional adsorption materials have low adsorption capacity and poor selectivity, and MOFs materials are structurally unstable in high-humidity environments, making it difficult to meet the industrial purification needs of the lithium battery industry.

Method used

A hierarchical porous carbon material was formed by preparing Mg-MOFs precursors, sulfur doping modification, and amine modification, and then subjected to gradient heating. Combined with polyetherimide modification, amine-modified MOFs-derived porous carbon was formed, which enhanced the adsorption performance of fluorides.

Benefits of technology

It achieves highly efficient adsorption of low-concentration HF with an adsorption efficiency greater than 98%, large adsorption capacity, and high stability. It is suitable for industrial waste gas treatment in the lithium battery industry, and the material is safe, inexpensive, and suitable for high-temperature and acidic environments.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN121317698A_ABST
    Figure CN121317698A_ABST
Patent Text Reader

Abstract

The invention relates to the technical field of hydrogen fluoride adsorbents, in particular to a preparation method of amine-modified MOFs derived porous carbon, which comprises the following steps: (1) preparation of an Mg-MOFs precursor: mixing isophthalic acid and a solvent to obtain a mixed solution, dissolving a magnesium source in the mixed solution, heating, stirring, cleaning and drying to obtain an Mg-MOFs solid; (2) sulfur doping modification: soaking the Mg-MOFs solid obtained in the step (1) in a thiourea solution, and reacting to obtain thiourea modified Mg-MOFs; (3) preparing a porous carbon base material through pyrolysis: placing the thiourea modified Mg-MOFs in the step (2) in a thermal environment of a nitrogen atmosphere or an inert atmosphere for gradient heating to obtain Mg-MOF derived graded porous carbon; and (4) amine modification functionalization: pouring polyetherimide into a solvent, then pouring into the Mg-MOF derivative graded porous carbon obtained in the step (3), and drying to obtain the amine modified MOFs derivative porous carbon. The amine-modified MOFs derived porous carbon provided by the invention can be used for adsorbing low-concentration fluorine-containing gas.
Need to check novelty before this filing date? Find Prior Art