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P. Bika et al., “Detection and Selective Sorption of Copper Ions by a COF-Modified Melamine Sponge,” ACS omega, vol. 10, no. 21, Jun. 2025.
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Εξειδίκευση τύπου : Άρθρο σε επιστημονικό περιοδικό
Τίτλος: Detection and Selective Sorption of Copper Ions by a COF-Modified Melamine Sponge
Δημιουργός/Συγγραφέας: Bika, Panagiota
Ioannidis, Nikolaos
Tsipas, Polychronis
Papagiannis, Stefanos
Gatou, Maria-Anna
Pavlatou, Evangelia A
Karydas, Andreas Germanos
Stergiopoulos, Thomas
[EL] Δάλλας, Παναγιώτης[EN] Dallas, Panagiotissemantics logo
Ημερομηνία: 2025-06-03
Γλώσσα: Αγγλικά
ISSN: 2470-1343
2470-1343
DOI: 10.1021/acsomega.5c01393
Άλλο: 40488043
Περίληψη: Commercial melamine sponges were modified with a functional covalent organic framework (COF), and they were evaluated as adsorbents of divalent copper cations from aqueous solutions. A phosphazene unit successfully covered the surface of the melamine sponge, and the organic framework was subsequently formed through the nucleophilic substitution with 4,4' bipyridine. The covalent organic framework functionalized on the melamine sponge can detect and effectively adsorb copper compounds in aqueous solutions. Its selectivity toward the adsorption of copper was demonstrated through the presence of different metal salts. Four competitive metal cations, i.e., copper, nickel, iron, and calcium, were selected to confirm the preferential binding of copper on the COF-functionalized sponge. The outcome was determined through the studies of X-Ray Fluorescence elemental analysis, X-Ray Photoelectron Spectroscopy (XPS), and Electron Paramagnetic Resonance experiments. XRF reported a copper sorption capacity of 293 μg cm-2, which is nearly nine times higher than the performance of the pristine sponge. Q-band EPR measurements demonstrated the presence of different coordination sites with different substituents for copper on the modified sponges, when the adsorption took place in an aqueous solution containing exclusively copper cations, while only one coordination, the favorable trigonal bipyramidal geometry, was obtained in the presence of additional metals.
Τίτλος πηγής δημοσίευσης: ACS omega
Τόμος/Κεφάλαιο: 10
Τεύχος: 21
Θεματική Κατηγορία: [EL] Αναλυτική χημεία[EN] Analytical chemistrysemantics logo
[EL] Χημεία[EN] Chemistrysemantics logo
Λέξεις-Κλειδιά: adsorption
copper
covalent organic frameworks
melamine
metals
Χρηματοδότης: European ResearchCouncil (ERC)
EU Grant: ATTP4 0359579 COF4SEA
EU Grant identifier: 818615-MIX2FIX
MIS 5217185
Κάτοχος πνευματικών δικαιωμάτων: © 2025 The Authors. Published by American Chemical Society
Όροι και προϋποθέσεις δικαιωμάτων: This article is licensed under CC-BY 4.0.
Ηλεκτρονική διεύθυνση στον εκδότη (link): https://doi.org/10.1021/acsomega.5c01393o
Εμφανίζεται στις συλλογές:Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο

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