Copper Micro-Flowers for Electrocatalytic Sensing of Nitrate Ions in Water.

Autor: Farina R; IMM-CNR, Strada VIII Z.I., 5, 95121 Catania, Italy.; Dipartimento di Scienze Chimiche, Università Degli Studi di Catania, Viale A. Doria 6, 95125 Catania, Italy., D'Arrigo G; IMM-CNR, Strada VIII Z.I., 5, 95121 Catania, Italy., Alberti A; IMM-CNR, Strada VIII Z.I., 5, 95121 Catania, Italy., Scalese S; IMM-CNR, Strada VIII Z.I., 5, 95121 Catania, Italy., Capuano GE; IMM-CNR, Strada VIII Z.I., 5, 95121 Catania, Italy., Corso D; IMM-CNR, Strada VIII Z.I., 5, 95121 Catania, Italy., Screpis GA; Dipartimento di Scienze Mediche, Chirurgiche e Tecnologie Avanzate 'G.F. Ingrassia', Università Degli Studi di Catania, Via S. Sofia 87, 95123 Catania, Italy., Coniglio MA; Dipartimento di Scienze Mediche, Chirurgiche e Tecnologie Avanzate 'G.F. Ingrassia', Università Degli Studi di Catania, Via S. Sofia 87, 95123 Catania, Italy.; IMM-CNR, Strada VIII Z.I., 5, 95121 Catania, Italy., Condorelli GG; Dipartimento di Scienze Chimiche, Università Degli Studi di Catania, Viale A. Doria 6, 95125 Catania, Italy., Libertino S; IMM-CNR, Strada VIII Z.I., 5, 95121 Catania, Italy.
Jazyk: angličtina
Zdroj: Sensors (Basel, Switzerland) [Sensors (Basel)] 2024 Jul 11; Vol. 24 (14). Date of Electronic Publication: 2024 Jul 11.
DOI: 10.3390/s24144501
Abstrakt: The progressive increase in nitrate's (NO 3 - ) presence in surface and groundwater enhances environmental and human health risks. The aim of this work is the fabrication and characterization of sensitive, real-time, low-cost, and portable amperometric sensors for low NO 3 - concentration detection in water. Copper (Cu) micro-flowers were electrodeposited on top of carbon screen-printed electrodes (SPCEs) via cyclic voltammetry (with voltage ranging from -1.0 V to 0.0 V at a scan rate of 0.1 V s -1 ). The obtained sensors exhibited a high catalytic activity toward the electro-reduction in NO 3 - , with a sensitivity of 44.71 μA/mM. They had a limit of detection of 0.87 µM and a good dynamic linear concentration range from 0.05 to 3 mM. The results were compared to spectrophotometric analysis. In addition, the devices exhibited good stability and a maximum standard deviation (RSD) of 5% after ten measurements; reproducibility, with a maximum RSD of 4%; and repeatability after 10 measurements with the RSD at only 5.63%.
Databáze: MEDLINE
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