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\n[www.journal.chemistry-europe.org](www.journal.chemistry-europe.org)  \nBifunctional Reduced Graphene Oxide Derivatives for PFOA Adsorption  \nRobert Schusterbauer, Pia Schünemann, Philip Nickl, Jasmin Er, Victoria Kämmer, Florian Junge, Salim Fazzani, Paul Mrkwitschka, Björn Meermann, Rainer Haag,* and Ievgen Donskyi*  \nInnovative materials are crucial for removing persistent pollutants per-and polyfluorinated alkyl substances (PFAS) from water. Here, a novel bifunctional reduced graphene oxide (TRGO) adsorbent is developed and characterized by advanced surface  \nsensitive methods. Compared to pristine TRGO, the functionalized TRGO shows markedly improved PFAS removal efficiency and demonstrates strong potential for water purification applications.  \n1. Introduction  \nPFAS are among the scientifically and publicly most recognized classes of pollutants in recent years. While thousands of PFAS find industrial use due to their inherent chemical stability and unmatched repellency of water and organics, perfluorosulfonic and perfluorocarboxylic acids are the most commonly detected PFAS in environmental samples and are in the spotlight of current restriction proposals. [1–3] Adsorption onto fixed beds of activated carbon or ion exchange resins has become the most commonly applied method for the technical removal of PFAS from contaminated water sources. [4–6] These traditional adsorbents often combine hydrophobic and electrostatic groups to interact with both perfluorinated tail and anionic head group of ubiquitous longchain perfluorosulfonic and perfluorocarboxylic acids, like perfluorooctanoic acid (PFOA) . [7,8] Additionally, per- and fluorinated segments are sometimes included into innovative materials to  \nR. Schusterbauer, P. Nickl, J. Er, V. Kämmer, F. Junge, S. Fazzani, R. Haag,  \nI. Donskyi  \nDepartment of Biology, Chemistry, and Pharmacy, Institute of Chemistry and Biochemistry  \nFreie Universität Berlin  \nTakustr. 3, 14195 Berlin, Germany  \nE-mail: [haag@chemie.fu-berlin.de](haag@chemie.fu-berlin.de)  \n[ievgen.donskyi@fu-berlin.de](ievgen.donskyi@fu-berlin.de)  \nR. Schusterbauer, P. Nickl, J. Er, P. Mrkwitschka, I. Donskyi Division 6.1 Surface and thin film analysis BAM—Federal Institute for Material Research and Testing Unter den Eichen 44–46, 12205 Berlin, Germany  \nP. Schünemann, B. Meermann  \nDivision 1.1 Inorganic Trace Analysis (ITALab)  \nBAM—Federal Institute for Material Research and Testing  \nRichard-Willstätter-Str. 11, 12489 Berlin, Germany  \n Supporting information for this article is available on the WWW under [https://](https://)[ ](https://)[doi.org/10.1002/ceur.202500240](doi.org/10.1002/ceur.202500240)  \n © 2025 The Author(s). ChemistryEurope published by Chemistry Europe and Wiley-VCH GmbH. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.  \nenable a more efficient removal of PFAS. [9,10] To further enhance PFAS adsorption strategies, recent attention has focused on advanced carbon-based nanomaterials. [2,11,12] Recent research has concentrated on the evaluation of the adsorption efficiency of GOs for PFOA at varying O/C ratios. These studies aim to elucidate the roles of hydrophobic and electrostatic interactions in the adsorption mechanism. [13] Complementary experimental studies on graphene functionalization have demonstrated that a positive surface charge enables nearly complete adsorption of various PFAS compounds. [11]  \nGraphene-based materials offer a promising solution due to their tunable surface chemistry and strong adsorption potential. [14–16] Graphene, as a 2D material, possesses an exceptionally high specific surface area of up to 2630 m2 g􀀁1,[17,18] which translates into a strong adsorption capacity[19] and makes it an excellent platform for developing adva","cbCaisZZjaCHZ2Ca","https://ap.wps.com/l/cbCaisZZjaCHZ2Ca","pdf",2005555,"English","# Introduction\n## Background on PFAS and PFOA adsorption\n## Graphene-based adsorbent rationale\n# Results and Discussion\n## PFOA specific adsorber material","[{\"question\":\"What adsorbent material is developed in the study?\",\"answer\":\"The study develops a bifunctional reduced graphene oxide (TRGO) adsorbent with a covalently conjugated dichlorotriazine moiety for PFOA adsorption.\"},{\"question\":\"How does functionalized TRGO compare with pristine TRGO for PFAS removal?\",\"answer\":\"Functionalized TRGO demonstrates markedly improved PFAS removal efficiency compared to pristine TRGO.\"},{\"question\":\"Which methods are used to characterize the adsorbent and evaluate removal?\",\"answer\":\"The adsorbent is characterized using techniques such as XPS, AFM, ToF-SIMS, elemental analysis, zeta-potential, and SEM, while PFOA removal efficiency is assessed via adsorption tests.\"}]","Bifunctional Reduced Graphene Oxide Derivatives for PFOA Adsorption | PDF",18]