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203,234 studies31 sourcesUpdated 41 min ago
Peer-reviewedCC BY 3.0RSC Advances

Fluorinated pore walls boost PFAS capture in mechanochemically synthesized covalent organic frameworks

  • Maroof Arshadul Hoque1,2
  • Tanja Westphalen1
  • Stephanie Kluge1
  • Christian Piechotta1
  • Jana Falkenhagen1
  • Nader de Sousa Amadeu1
  • Carsten Prinz1
  • Prasenjit Das3
  • Ernesto Scoppola4
  • Tomasz M. Stawski1
  • Biswajit Bhattacharya1
  • Franziska Emmerling1,2
4 affiliations
  1. 1BAM Federal Institute for Materials Research and Testing Richard-Willstätter-Str. 11 12489 Berlin Germany
  2. 2Department of Chemistry, Humboldt University Berlin Brook-Taylor-Straße 2 12489 Berlin Germany
  3. 3Department of Chemistry, Functional Materials, Indian Institute of Technology Ropar SSB Block Rupnagar Punjab 140001 India
  4. 4Department of Biomaterials, Max Planck Institute of Colloids and Interfaces Am Mühlenberg 1 14476 Potsdam Germany
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Abstract

Per- and polyfluoroalkyl substances (PFAS) are persistent water contaminants that require robust, high-affinity sorbents. Covalent organic frameworks (COFs) provide chemically stable, modular platforms for capturing PFAS and mechanochemical synthesis offers an environmentally friendly, scalable method of production. In this study, we use mechanochemistry to quickly produce an isoreticular series of large-pore imine COFs (TAPB-TA, TAPB-DFTA and TAPB-DMTA) with systematically varied pore-wall functionality, which is optimised for PFAS adsorption. The fluorinated TAPB-DFTA COF exhibits the greatest crystallinity, the highest BET surface area (1237 m2 g−1) and the greatest thermal stability. These properties result in superior uptake of PFOA, PFOS and short-chain analogues compared to the methylated and unsubstituted analogues in batch adsorption experiments across a broad concentration range. The three COFs achieve near-quantitative PFOS removal within minutes, while TAPB-DFTA maintains significantly higher PFOA removal even at a feed concentration of 100 mg L−1. These findings indicate that mechanochemical synthesis combined with pore wall modification offers a possible approach for tuning COF adsorption sites for PFAS uptake.

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Cite

BibTeXRIS
BibTeX
@article{hoque2026fluorinated,
  title = {{Fluorinated pore walls boost PFAS capture in mechanochemically synthesized covalent organic frameworks}},
  author = {Maroof Arshadul Hoque and Tanja Westphalen and Stephanie Kluge and Christian Piechotta and Jana Falkenhagen and Nader de Sousa Amadeu and Carsten Prinz and Prasenjit Das and Ernesto Scoppola and Tomasz M. Stawski and Biswajit Bhattacharya and Franziska Emmerling},
  journal = {RSC Advances},
  year = {2026},
  month = oct,
  doi = {10.1039/d6ra06859f},
  url = {https://doi.org/10.1039/d6ra06859f},
  note = {CC BY 3.0},
}
RIS
TY  - JOUR
TI  - Fluorinated pore walls boost PFAS capture in mechanochemically synthesized covalent organic frameworks
AU  - Maroof Arshadul Hoque
AU  - Tanja Westphalen
AU  - Stephanie Kluge
AU  - Christian Piechotta
AU  - Jana Falkenhagen
AU  - Nader de Sousa Amadeu
AU  - Carsten Prinz
AU  - Prasenjit Das
AU  - Ernesto Scoppola
AU  - Tomasz M. Stawski
AU  - Biswajit Bhattacharya
AU  - Franziska Emmerling
PY  - 2026
DA  - 2026/10/09
JO  - RSC Advances
DO  - 10.1039/d6ra06859f
UR  - https://doi.org/10.1039/d6ra06859f
AB  - Per- and polyfluoroalkyl substances (PFAS) are persistent water contaminants that require robust, high-affinity sorbents. Covalent organic frameworks (COFs) provide chemically stable, modular platforms for capturing PFAS and mechanochemical synthesis offers an environmentally friendly, scalable method of production. In this study, we use mechanochemistry to quickly produce an isoreticular series of large-pore imine COFs (TAPB-TA, TAPB-DFTA and TAPB-DMTA) with systematically varied pore-wall functionality, which is optimised for PFAS adsorption. The fluorinated TAPB-DFTA COF exhibits the greatest crystallinity, the highest BET surface area (1237 m2 g−1) and the greatest thermal stability. These properties result in superior uptake of PFOA, PFOS and short-chain analogues compared to the methylated and unsubstituted analogues in batch adsorption experiments across a broad concentration range. The three COFs achieve near-quantitative PFOS removal within minutes, while TAPB-DFTA maintains significantly higher PFOA removal even at a feed concentration of 100 mg L−1. These findings indicate that mechanochemical synthesis combined with pore wall modification offers a possible approach for tuning COF adsorption sites for PFAS uptake.
SN  - 2046-2069
ER  -