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Updated: Sep 13, 2025

Microfluidic-based Synthesis of Covalent Organic Frameworks COFs: A Tool for Continuous Production of COF Fibers and Direct Printing on a Surface
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Amine-functionalized covalent organic frameworks for high-performance carbon dioxide capture.

Feifan Zhao1, Feiyan Xu2, Hermenegildo García3

  • 1Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, 68 Jincheng Street, Wuhan 430078, PR China.

Journal of Colloid and Interface Science
|July 31, 2025
PubMed
Summary

A new amine-functionalized covalent organic framework (COF), TaTp-COF, shows high efficiency for carbon dioxide (CO2) capture from industrial flue gas. This material demonstrates excellent CO2 uptake and selectivity, offering a promising solution for sustainable gas separation technologies.

Keywords:
Amine functionalizationCO(2) capture and sequestrationCOFsFlue gas purification

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Synthesis and Characterization of Functionalized Metal-organic Frameworks
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Area of Science:

  • Materials Science
  • Chemical Engineering
  • Environmental Science

Background:

  • Covalent organic frameworks (COFs) are promising for carbon capture due to their properties.
  • Challenges exist in deploying COFs for low-concentration CO2 capture, such as in industrial flue gas.
  • Developing efficient and selective adsorbents is crucial for carbon capture technologies.

Purpose of the Study:

  • To synthesize and evaluate an amine-functionalized COF (TaTp-COF) for efficient CO2 capture.
  • To assess the performance of TaTp-COF under conditions relevant to industrial flue gas.
  • To understand the CO2 adsorption mechanism and structure-property relationships in functionalized COFs.

Main Methods:

  • Synthesis of TaTp-COF via spontaneous enol-to-ketoamine tautomerization.
  • Characterization of COF properties, including porosity, surface area, and chemical stability.
  • CO2 adsorption/desorption experiments at various temperatures and pressures.
  • Spectroscopic analyses (e.g., FTIR, NMR) and theoretical calculations to elucidate adsorption mechanisms.

Main Results:

  • TaTp-COF exhibits high CO2 uptake (5.0 mmol g⁻¹ at 0 °C and 1 bar) and excellent CO2/N2 selectivity (233).
  • The material demonstrates high adsorption efficiency at low CO2 partial pressures, suitable for flue gas treatment.
  • Spectroscopic and theoretical studies confirm carbamic acid formation, indicating strong host-guest interactions and efficient amine site utilization.

Conclusions:

  • TaTp-COF is a highly effective adsorbent for scalable and energy-efficient CO2 capture from flue gas.
  • The uniform dispersion of amine groups enhances CO2 binding, stability, and reduces secondary emissions.
  • This work provides design principles for developing advanced functionalized COFs for sustainable gas separation.