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Electrochemical real-time sensor for the detection of Pb(II) ions based on Ti3C2Tx MXene
Journal article   Peer reviewed

Electrochemical real-time sensor for the detection of Pb(II) ions based on Ti3C2Tx MXene

Sarunas Zukauskas, Alma Rucinskiene, Simonas Ramanavicius, Anton Popov, Gediminas Niaura, Ivan Baginskiy, Veronika Zahorodna, Serhii Dukhnovskiy, Oleksiy Gogotsi and Arunas Ramanavicius
The Science of the total environment, v 950, 175190
10 Nov 2024
DOI: https://doi.org/10.1016/j.scitotenv.2024.175190
PMID: 39094638

Abstract

Environmental Sciences Environmental Sciences & Ecology Life Sciences & Biomedicine Science & Technology
Lead ions are especially harmful to human health, causing significant developmental and behavioral abnormalities even at small concentrations. In real-life samples, lead ions are present in mixtures with other metal ions, creating a challenge to detect it selectively at low quantities. To address these challenges, we prepared an electrochemical sensor based on delaminated Ti3C2Tx MXene, which can selectively detect low concentrations of Pb2+ in a solution containing other common metal ions. Cyclic voltammetry was applied as an electrochemical detection method. The proposed reaction mechanism involves a reversible transition between Pb2+ ions and PbO at the MXene-based layer. The sensitivity of the sensor towards Pb2+ ions and a limit of detection were determined. The sensor, as prepared, had a linear response range within 0.15-1.0 mu M, with a sensitivity of 26.7 mu A/mu M and LOD value of 48.7 nM, which meets the requirements set by the World Health Organization.

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