Design and fabrication of an innovative electrochemical sensor based on Mg-doped ZnO nanoparticles for the detection of toxic catechol

Indrajith Naik, E and Sunil Kumar Naik, TS and Pradeepa, E and Singh, S and Naik, HSB (2022) Design and fabrication of an innovative electrochemical sensor based on Mg-doped ZnO nanoparticles for the detection of toxic catechol. In: Materials Chemistry and Physics, 281 .

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Abstract

In this work, a novel approach has been carried out for the development of a sensor to detect toxic species catechol. Zinc oxide doped with magnesium was designed as a catalyst material and synthesized using the auto-combustion technique. The obtained product was confirmed by various characterization techniques like FTIR, XRD, FE-SEM, and UV�visible spectroscopic studies. Carbon paste electrode chosen as working electrode substrate was modified by the synthesized nanoparticles and employed for the detection of catechol. Well-known electroanalytical techniques like cyclic voltammetry and linear sweep voltammetry were employed for the electrochemical analysis using 0.1 M phosphate buffer saline as a supporting medium. The fabricated Mg-doped ZnO modified carbon paste electrode (Mg�ZnO/MCPE) exhibited excellent sensing properties for the detection of CC in terms of good reproducibility, stability, selectivity, and sensitivity. The diffusion-controlled electrode process was confirmed at the developed sensor and the LLOD was found to be 0.69 μM. Moreover, a real-world sample analysis was carried out considering local tap water at the proposed sensor. Thus, the developed Mg�ZnO/MCPE demonstrated admirable electrocatalytic performance towards catechol sensing can be applied for real-time monitoring. © 2022 Elsevier B.V.

Item Type:	Journal Article
Publication:	Materials Chemistry and Physics
Publisher:	Elsevier Ltd
Additional Information:	The copyright for this article belongs to Elsevier Ltd
Keywords:	Carbon; Combustion; Cyclic voltammetry; Electrochemical electrodes; Electrochemical sensors; Fabrication; II-VI semiconductors; Magnesium compounds; Metal nanoparticles; Phenols; Sol-gels; Spectroscopic analysis; Synthesis (chemical), Auto-combustion methods; Catalyst material; Mg-doped ZnO; Mg-doped ZnO nanoparticle; Modified carbon paste electrode; Sol-gel auto combustion method; Sol-gel auto-combustion; Synthesised; Toxic species; ZnO nanoparticles, ZnO nanoparticles
Department/Centre:	Division of Interdisciplinary Sciences > Interdisciplinary Centre for Water Research Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	16 Mar 2022 06:05
Last Modified:	16 Mar 2022 06:05
URI:	http://eprints.iisc.ac.in/id/eprint/71430

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