Facile preparation of a Pt-ERGO composite modified screen-printed electrode for the sensitive determination of phenolic compounds.

Autor:	Lema L; Department of Chemistry, Centre of Chemistry, Campus Gualtar, University of Minho, 4710-057, Braga, Portugal.; Higher Institute of Educational Sciences of Uíge, Uíge, Angola., Oliveira R; Department of Chemistry, Centre of Chemistry, Campus Gualtar, University of Minho, 4710-057, Braga, Portugal., Amorim I; Department of Chemistry, Centre of Chemistry, Campus Gualtar, University of Minho, 4710-057, Braga, Portugal.; Clean Energy Cluster, International Iberian Nanotechnology Laboratory (INL), Avenida Mestre Jose Veiga, 4715-330, Braga, Portugal., Bettencourt AP; Department of Chemistry, Centre of Chemistry, Campus Gualtar, University of Minho, 4710-057, Braga, Portugal., Bento F; Department of Chemistry, Centre of Chemistry, Campus Gualtar, University of Minho, 4710-057, Braga, Portugal.
Jazyk:	angličtina
Zdroj:	Heliyon [Heliyon] 2023 Nov 20; Vol. 9 (12), pp. e22521. Date of Electronic Publication: 2023 Nov 20 (Print Publication: 2023).
DOI:	10.1016/j.heliyon.2023.e22521
Abstrakt:	The mass production of screen-printed electrochemical devices with integrated electrodes has facilitated the widespread adoption of electroanalytical methods. The SPEs (screen-printed electrodes) overcome some obstacles associated with the use of conventional electrochemical cells, making them accessible to untrained operators. Despite their advantages, SPEs require activation/modification of the working electrode (WE) to enhance sensitivity. Nanomaterials, with metal nanoparticles (NPs) dispersed in polymers and/or carbon NPs has gaining popularity for this purpose. In this study, we describe a modification of carbon SPEs (SPCEs) using Pt NPs and reduced graphene oxide (ERGO). The Pt-ERGO@SPCE is prepared by galvanostatic reduction of drop-casted precursors directly onto the WE surface, eliminating complex synthetic steps and high temperatures. After optimizing Pt amount and reduction extent, the modified SPCEs were tested for detecting hydroquinone (HQ) and bisphenol A (BPA). DPV results show significantly increased sensitivity for the quantification of both compounds. The modified SPCEs demonstrates promising performance: precision (5 % HQ, 8 % BPA), detection limits (1.4 μM HQ, 4.6 μM BPA), sensitivity (1688 μA mM -1 HQ, 441 μA mM -1 BPA), and recoveries (98-113 % HQ, 98-104 % BPA). This simple electrode modification holds great potential, allowing the preparation of the sensor by personnel who may lack access to well-equipped laboratories, particularly in developing countries. Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (© 2023 The Authors. Published by Elsevier Ltd.)
Databáze:	MEDLINE
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