Enhanced voltammetric performance of sensors based on oxidized 2D layered black phosphorus.

Autor: Tapia MA; Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain., Gusmão R; Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 166 28, Prague 6, Czech Republic., Pérez-Ràfols C; Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain; Water Research Institute (IdRA), University of Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain., Subirats X; Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain., Serrano N; Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain; Water Research Institute (IdRA), University of Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain. Electronic address: nuria.serrano@ub.edu., Sofer Z; Department of Inorganic Chemistry, University of Chemistry and Technology Prague, Technicka 5, 166 28, Prague 6, Czech Republic. Electronic address: zdenek.sofer@vscht.cz., Díaz-Cruz JM; Department of Chemical Engineering and Analytical Chemistry, University of Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain; Water Research Institute (IdRA), University of Barcelona, Martí i Franquès 1-11, 08028, Barcelona, Spain.
Jazyk: angličtina
Zdroj: Talanta [Talanta] 2022 Feb 01; Vol. 238 (Pt 2), pp. 123036. Date of Electronic Publication: 2021 Nov 05.
DOI: 10.1016/j.talanta.2021.123036
Abstrakt: The exceptional properties of 2D layered black phosphorus (BP) make it a promising candidate for electrochemical sensing applications and, even though BP is considered unstable and tends to degrade by the presence of oxygen and moisture, its oxidation can be beneficial in some situations. In this work, we present an unequivocal demonstration that the exposition of BP-based working electrodes to normal ambient conditions can indeed be advantageous, leading to an enhancement of voltammetric sensing applications. This point was proved using a BP modified screen-printed carbon electrode (BP-SPCE) for the voltammetric determination of dopamine (DA) as a model target analyte. Oxidized BP-SPCE (up to 35% of P x O y at the surface) presented an enhanced analytical performance with a 5-fold and 2-fold increase in sensitivity, as compared to bare-SPCE and non-oxidized BP-SPCE stored in anhydrous atmosphere, respectively. Good detection limit, repeatability, reproducibility, stability, selectivity, and accuracy were also achieved. Overall, the results presented herein display the prominent possibilities of preparing and working with BP based-sensors in normal ambient settings and showcase their implementation under physiological conditions.
(Copyright © 2021 The Authors. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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