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Related Experiment Video

Updated: Jan 17, 2026

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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Mechanochemically Synthesized Covalent Organic Framework Effectively Captures PFAS Contaminants.

Maroof Arshadul Hoque1, Thomas Sommerfeld1, Jan Lisec1

  • 1BAM Federal Institute for Materials Research and Testing, Richard-Willstätter-Str. 11, 12489, Berlin, Germany.

Small (Weinheim an Der Bergstrasse, Germany)
|September 18, 2025
PubMed
Summary

A new covalent organic framework (COF) efficiently removes harmful per- and polyfluoroalkyl substances (PFAS) from water. This metal-free material shows rapid adsorption of PFOA and PFOS, offering a promising solution for water purification.

Keywords:
COFPFASadsorptionin situmechanochemistry

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Area of Science:

  • Environmental Chemistry
  • Materials Science
  • Nanotechnology

Background:

  • Per- and polyfluoroalkyl substances (PFAS) are persistent environmental contaminants linked to significant health risks.
  • Developing effective removal methods and adsorbers for PFAS is a critical environmental challenge.
  • Covalent organic frameworks (COFs) offer potential as stable, tunable, and metal-free adsorbers.

Purpose of the Study:

  • To synthesize a highly crystalline covalent organic framework (COF) for PFAS removal.
  • To investigate the adsorption efficiency and kinetics of the synthesized COF for common PFAS.
  • To elucidate the interaction mechanisms between PFAS molecules and the COF structure.

Main Methods:

  • Mechanochemical synthesis of a TAPB-TFB COF.
  • Real-time monitoring of COF formation using in situ synchrotron X-ray diffraction.
  • Adsorption experiments for PFAS removal from water, including PFOA and PFOS.
  • Characterization using X-ray photoelectron spectroscopy, FTIR, and DFT calculations.

Main Results:

  • A highly crystalline TAPB-TFB COF was successfully synthesized.
  • The COF demonstrated efficient removal of PFAS, including PFOA and PFOS, from water.
  • Rapid adsorption kinetics were observed, with most PFAS removed within 10 minutes.
  • Molecular interactions between PFAS and the COF were elucidated.

Conclusions:

  • The TAPB-TFB COF is a highly effective and rapid adsorbent for PFAS removal.
  • This metal-free COF presents a promising material for advanced water treatment applications.
  • The study provides insights into the mechanism of PFAS adsorption by COFs.