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Electrochemical Sensors for Detection and Analysis

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Chemical Sensors".

Deadline for manuscript submissions: closed (31 July 2024) | Viewed by 3237

Special Issue Editors


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Laboratory for Electrocatalysis, Analytical Chemistry Laboratory, National Institute of Chemistry, Hajdrihova 19, 1000 Ljubljana, Slovenia
Interests: synthesis of functional materials; ionic liquids; electrochemical sensors
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Faculty of Chemistry and Chemical Engineering, University of Maribor, Smetanova ulica 17, 2000 Maribor, Slovenia
Interests: surface chemistry; electrochemical sensors; corrosion; EIS
Special Issues, Collections and Topics in MDPI journals

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Institute of Chemistry, Faculty of Natural Sciences and Mathematics, “Ss Cyril and Methodius” University, Arhimedova 5, P.O. Box 162 Skopje, North Macedonia
Interests: electrochemistry; modelling; surface chemistry; electrochemical sensors

Special Issue Information

Dear Colleagues,

Current investigations on sensing materials have increased rapidly due to their ever-improving electrochemical properties, which together with advances in electrochemical methods and sensor electronics make them extremely useful in on-site and on-demand electrochemical detection and analysis. The chemical composition of nanostructured materials and composites offers enhanced interaction with target species present either in solution or in a gas phase contribute to superior sensitivity and selectivity of sensors. Emerging nanomaterials can have a significant effect on electrochemical properties and together with various voltammetric and amperometric methods offer novel opportunities for fast and reliable on-site analysis.

This Special Issue aims to focus on the most recent strategies and developments in the field. Papers should address the preparation and use of state-of-the-art nanomaterials and/or the study and application of their electrochemical properties and/or improved sensitivity/selectivity of such materials as well as novel electrochemical methods in the development of sensors. Metal nanoparticles or alloys, conductive nanoporous platforms and 2D materials are among the innovative nanomaterials expected to be brought forward in this Special Issue.

Both review articles and original research papers are welcome.

Dr. Vasko Jovanovski
Dr. Matjaž Finšgar
Prof. Dr. Valentin Mirčeski
Guest Editors

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Published Papers (3 papers)

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Research

13 pages, 4143 KiB  
Article
Study of Ion-to-Electron Transducing Layers for the Detection of Nitrate Ions Using FPSX(TDDAN)-Based Ion-Sensitive Electrodes
by Camille Bene, Adrian Laborde, Morgan Légnani, Emmanuel Flahaut, Jérôme Launay and Pierre Temple-Boyer
Sensors 2024, 24(18), 5994; https://doi.org/10.3390/s24185994 - 15 Sep 2024
Viewed by 882
Abstract
The development of ISE-based sensors for the analysis of nitrates in liquid phase is described in this work. Focusing on the tetradodecylammonium nitrate (TDDAN) ion exchanger as well as on fluoropolysiloxane (FPSX) polymer-based layers, electrodeposited matrixes containing double-walled carbon nanotubes (DWCNTs), embedded in [...] Read more.
The development of ISE-based sensors for the analysis of nitrates in liquid phase is described in this work. Focusing on the tetradodecylammonium nitrate (TDDAN) ion exchanger as well as on fluoropolysiloxane (FPSX) polymer-based layers, electrodeposited matrixes containing double-walled carbon nanotubes (DWCNTs), embedded in either polyethylenedioxythiophene (PEDOT) or polypyrrole (PPy) polymers, ensured improved ion-to-electron transducing layers for NO3 detection. Thus, FPSX-based pNO3-ElecCell microsensors exhibited good detection properties (sensitivity up to 55 mV/pX for NO3 values ranging from 1 to 5) and acceptable selectivity in the presence of the main interferent anions (Cl, HCO3, and SO42−). Focusing on the temporal drift bottleneck, mixed results were obtained. On the one hand, relatively stable measurements and low temporal drifts (~1.5 mV/day) were evidenced on several days. On the other hand, the pNO3 sensor properties were degraded in the long term, being finally characterized by high response times, low detection sensitivities, and important measurement instabilities. These phenomena were related to the formation of some thin water-based layers at the polymer–metal interface, as well as the physicochemical properties of the TDDAN ion exchanger in the FPSX matrix. However, the improvements obtained thanks to DWCNT-based ion-to-electron transducing layers pave the way for the long-term analysis of NO3 ions in real water-based solutions. Full article
(This article belongs to the Special Issue Electrochemical Sensors for Detection and Analysis)
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13 pages, 4620 KiB  
Article
Electrochemical Determination of Dopamine with a Carbon Paste–Lanthanum (III) Oxide Micro-Composite Electrode: Effect of Cetyl Trimethyl Ammonium Bromide Surfactanton Selectivity
by Edgar Nagles, Fernando Riesco and Luz Roldan-Tello
Sensors 2024, 24(16), 5420; https://doi.org/10.3390/s24165420 - 22 Aug 2024
Viewed by 714
Abstract
This paper presents a new application of a lanthanum oxide (III)-modified carbon paste electrode (LaOX/CPE) for dopamine (DP) detection in the presence of ascorbic acid (AA). The presence of cetyl trimethyl ammonium bromide (CTAB) facilitated the LaOX/CPE electrode’s ability [...] Read more.
This paper presents a new application of a lanthanum oxide (III)-modified carbon paste electrode (LaOX/CPE) for dopamine (DP) detection in the presence of ascorbic acid (AA). The presence of cetyl trimethyl ammonium bromide (CTAB) facilitated the LaOX/CPE electrode’s ability to detect DP amidst AA interference, resulting in a substantial 70.0% increase in the anodic peak current for DP when compared to the unmodified carbon paste electrode (CPE). CTAB enabled clear separation of the anodic peaks for DP and AA by nearly 0.2 V, despite their initially overlapping potential values, through the ion–dipole interaction of AA and CTAB. The electrode was characterized using cyclic voltammetry (CV) and energy-dispersive spectroscopy (EDS). The method demonstrated a detection limit of 0.06 µmol/L with a relative standard deviation (RSD) of 6.0% (n = 15). Accuracy was assessed through the relative error and recovery percent, using urine samples spiked with known quantities of DP. Full article
(This article belongs to the Special Issue Electrochemical Sensors for Detection and Analysis)
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13 pages, 3500 KiB  
Article
Electrochemical Detection of Ammonia in Water Using NiCu Carbonate Hydroxide-Modified Carbon Cloth Electrodes: A Simple Sensing Method
by Guangfeng Zhou, Guanda Wang, Xing Zhao, Dong He, Chun Zhao and Hui Suo
Sensors 2024, 24(15), 4824; https://doi.org/10.3390/s24154824 - 25 Jul 2024
Cited by 1 | Viewed by 1124
Abstract
Excessive ammonia nitrogen can potentially compromise the safety of drinking water. Therefore, developing a rapid and simple detection method for ammonia nitrogen in drinking water is of great importance. Nickel–copper hydroxides exhibit strong catalytic capabilities and are widely applied in ammonia nitrogen oxidation. [...] Read more.
Excessive ammonia nitrogen can potentially compromise the safety of drinking water. Therefore, developing a rapid and simple detection method for ammonia nitrogen in drinking water is of great importance. Nickel–copper hydroxides exhibit strong catalytic capabilities and are widely applied in ammonia nitrogen oxidation. In this study, a self-supported electrode made of nickel–copper carbonate hydroxide was synthesized on a carbon cloth collector via a straightforward one-step hydrothermal method for rapid ammonia nitrogen detection in water. It exhibits sensitivities of 3.9 μA μM−1 cm−2 and 3.13 μA μM−1 cm−2 within linear ranges of 1 μM to 100 μM and 100 μM to 400 μM, respectively, using a simple and rapid i-t method. The detection limit is as low as 0.62 μM, highlighting its excellent anti-interference properties against various anions and cations. The methodology’s simplicity and effectiveness suggest broad applicability in water quality monitoring and environmental protection, particularly due to its significant cost-effectiveness. Full article
(This article belongs to the Special Issue Electrochemical Sensors for Detection and Analysis)
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