Author, as appears in the article.: Abate, Chiara; Neri, Giulia; Scala, Angela; Mineo, Placido Giuseppe; Fazio, Enza; Mazzaglia, Antonino; Fragoso, Alex; Giuffre, Ottavia; Foti, Claudia; Piperno, Anna
Department: Enginyeria Química
URV's Author/s: Fragoso Sierra, Alex
Keywords: Voltammetry, mercury sensor Modified screen-printed carbon electrodes Ferrocenylcarnosine Cationic cyclodextrin carbon nanotubes
Abstract: The study reports the use of nanoassembly based on cationic cyclodextrin carbon nanotubes (CNT-CDs) and ferrocenylcarnosine (FcCAR) for electrochemical sensing of Hg(II) in aqueous solution. β-cyclodextrins (CDs) were grafted onto CNTs by a click chemistry reaction between heptakis-(6-azido-6-deoxy)-β-cyclodextrin and alkyne-terminated CNTs. The cationic amine groups on the CD units were produced by the subsequent reduction of the residual nitrogen groups. The chemical composition and morphology of CNT-CDs were analyzed by X-ray photoelectron spectroscopy, scanning electron microscopy, and thermogravimetric analysis. A N,N-dimethylformamide dispersion of CNT-CDs was cast on the surface of screen-printed carbon electrodes (SPCEs), and the electrochemical response was evaluated by cyclic voltammetry (CV) using [Fe(CN)6]3- as the redox probe. The ability of SPCE/CNT-CD to significantly enhance the electroactive properties of the redox probe was combined with a suitable recognition element (FcCAR) for Hg(II). The electrochemical response of the CNT-CD/FcCAR nanoassembly was evaluated by CV and electrochemical impedance spectroscopy. The analytical performance of the Hg(II) sensor was evaluated by differential pulsed voltammetry and chronoamperometry. The oxidative peak current showed a linear concentration dependence in the range of 1-100 nM, with a sensitivity of 0.12 μA/nM, a limit of detection of 0.50 nM, and a limit of quantification of 1 nM.
Thematic Areas: Nanoscience & nanotechnology Materials science, multidisciplinary Materials science (miscellaneous) Materials science (all) General materials science
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: alex.fragoso@urv.cat
Author identifier: 0000-0003-4839-6094
Record's date: 2024-10-12
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: https://pubs.acs.org/doi/10.1021/acsanm.3c03480
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Acs Applied Nano Materials. 6 (18): 17187-17195
APA: Abate, Chiara; Neri, Giulia; Scala, Angela; Mineo, Placido Giuseppe; Fazio, Enza; Mazzaglia, Antonino; Fragoso, Alex; Giuffre, Ottavia; Foti, Claudia; (2023). Screen-Printed Carbon Electrodes with Cationic Cyclodextrin Carbon Nanotubes and Ferrocenyl-Carnosine for Electrochemical Sensing of Hg(II). Acs Applied Nano Materials, 6(18), 17187-17195. DOI: 10.1021/acsanm.3c03480
Article's DOI: 10.1021/acsanm.3c03480
Entity: Universitat Rovira i Virgili
Journal publication year: 2023
Publication Type: Journal Publications
Repositori URV