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JOURNALS // Mendeleev Communications // Archive
Mendeleev Commun., 2025 Volume 35, Issue 5, Pages 553–554 (Mi mendc7284)
Communications

Photoluminescent hydrogel/carbon quantum dots nanocomposite for Fe3+ ions sensing: selectivity and recovery

A. M. Borodina, S. V. Kostromin, S. V. Bronnikov

Institute of Macromolecular Compounds, Branch of B. P. Konstantinov Petersburg Nuclear Physics Institute of National Research Centre ‘Kurchatov Institute’, 199004 St. Petersburg, Russian Federation

Abstract: Polyacrylamide-based hydrogel filled with carbon quantum dots (PAA@CQDs) exhibiting intensive photoluminescence (PL) under UV irradiation was prepared. The exceptional capability of the Fe3+ ions to quench PAA@CQDs PL in aqueous solution was found. The PL recovery after repeated quenching was detected when hydrochloric acid was used as a regenerant, thus ensuring the PAA@CQDs reusability as a chemosensor for the Fe3+ ions detection in aqueous media.

Keywords: carbon quantum dots, fluorescent hydrogel, photoluminescence quenching, iron (III) sensing, photoluminescence recovery.

Received: 03.03.2025
Accepted: 18.04.2025

Language: English

DOI: 10.71267/mencom.7756


© Steklov Math. Inst. of RAS, 2025