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Mechanochemically Synthesized Covalent Organic Framework Effectively Captures PFAS Contaminants

Year: 2025

Type: article

Abstract: Per‐ and polyfluoroalkyl substances (PFAS) are persistent environmental contaminants that pose significant health risks, prompting urgent efforts to develop effective removal methods and adsorbers. Covalent organic frameworks (COFs) are metal‐free adsorbers with high stability and tunable porosity. A highly crystalline COF is synthesised mechanochemically using 1,3,5‐tris(4‐aminophenyl)benzene (TAPB) and 1,3,5‐triformylbenzene (TFB). The formation dynamics are monitored in real time with time‐resolved in situ synchrotron X‐ray diffraction. The TAPB‐TFB COF demonstrates good efficiency in eliminating PFAS from water. Perfluorooctanoic acid (PFOA) and perfluorooctanesulfonic acid (PFOS) are effectively extracted, and most of the adsorption occurred within the first 10 min. Additionally, X‐ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, and DFT calculations are employed to elucidate the molecular interactions between PFAS and the COF framework. The rapid and efficient removal of PFAS makes TAPB‐TFB COF a promising material for water treatment applications.

Source: edoc Publication server (Humboldt University of Berlin)

DOI: 10.18452/36480

Authors: Hoque, Maroof Arshadul, Sommerfeld, Thomas, Lisec, Jan, Das, Prasenjit, Prinz, Carsten, Heinekamp, Christian, Stolar, Tomislav, Etter, Martin, Rosenberger, David, George, Janine, Bhattacharya, Biswajit, Emmerling, Franziska

Language: English

Topic: Covalent Organic Framework Applications

Subfield: Materials Chemistry

Field: Materials Science

Domain: Physical Sciences

SDGs: Clean water and sanitation, Responsible consumption and production

Open Access status: green

OpenAlex ID: W7139110069

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