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Molecules
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Electrochemical Sensors and Cells for Environmental Applications
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Electrochemical Sensors and Cells for Environmental Applications

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Electrochemistry".

Deadline for manuscript submissions: 16 June 2024 | Viewed by 6652

Special Issue Editors

Dr. Naoufel Haddour

E-Mail Website
Guest Editor
Ampère Lab, Ecole Centrale de Lyon, 69134 Ecully, France
Interests: electrochemical sensors; biosensors; microbial fuel cells; wastewater treatment; electrochemical treatment; Galvano-Fenton process; biochar-based electrodes
Special Issues, Collections and Topics in MDPI journals
Dr. Yamina Mounia Azri

E-Mail Website
Guest Editor Assistant
Centre de Développement des Energies Renouvelables (CDER), Bouzaréah, 16340 Algiers, Algeria
Interests: electrochemistry; plant microbial fuel cell; electroactive biofilms; electrocoagulation; biosensors; wastewater treatment; electro-fenton process

Special Issue Information

Dear Colleagues,

Several electrochemical technologies have emerged as promising approaches to remediate environmental problems. The applications include environmental monitoring, removal of hazardous species from liquid wastes and polluted soils, conversion of CO2 into feedstock chemicals and fuels, as well as recovery energy and resources from wastes. New research topics continue to emerge. Despite extensive research efforts, many of those technologies are far from being introduced as efficient processes in real world applications. Important barriers need to be overcome to achieve full-scale applications in industry. Therefore, this Special Issue was designed to highlight all contributions that report on experimental and/or theoretical studies aiming for greater understanding and improvement of various electrochemical processes for environmental applications. Researchers are invited to submit their original research as well as review/perspective articles for publication in this Special Issue. Potential topics include but are not limited to:

  • Electrochemical sensors for environmental monitoring;
  • Electrochemical technologies used for energy and resource extraction from wastes;
  • Electrochemical technologies for environmental remediation;
  • Electrochemical processes for CO2 conversion;
  • Electrochemical technologies for waste/water treatment;
  • Electrodes or catalysts based on wastes or eco-friendly raw materials.

Dr. Naoufel Haddour
Guest Editor

Dr. Yamina Mounia Azri
Guest Editor Assistant

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • electrochemical sensors
  • biosensors
  • microbial fuel cells
  • electrogenic bacteria
  • electrochemical AOPs
  • electrodialysis
  • electrocoagulation
  • electrocatalysts
  • electrode materials

Published Papers (3 papers)

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Research

14 pages, 3175 KiB  
Article
Effect of Contact Area and Shape of Anode Current Collectors on Bacterial Community Structure in Microbial Fuel Cells
by Agathe Paitier, Naoufel Haddour, Chantal Gondran and Timothy M. Vogel
Molecules 2022, 27(7), 2245; https://doi.org/10.3390/molecules27072245 - 30 Mar 2022
Cited by 8 | Viewed by 2226
Abstract
Low electrical conductivity of carbon materials is a source of potential loss for large carbonaceous electrode surfaces of MFCs due to the long distance traveled by electrons to the collector. In this paper, different configurations of titanium current collectors were used to connect [...] Read more.
Low electrical conductivity of carbon materials is a source of potential loss for large carbonaceous electrode surfaces of MFCs due to the long distance traveled by electrons to the collector. In this paper, different configurations of titanium current collectors were used to connect large surfaces of carbon cloth anodes. The current collectors had different distances and contact areas to the anode. For the same anode surface (490 cm2), increasing the contact area from 28 cm2 to 70 cm2 enhanced power output from 58 mW·m−2 to 107 mW·m−2. For the same contact area (28 cm2), decreasing the maximal distance of current collectors to anodes from 16.5 cm to 7.75 cm slightly increased power output from 50 mW·m−2 to 58 mW·m−2. Molecular biology characterization (qPCR and 16S rRNA gene sequencing) of anodic bacterial communities indicated that the Geobacter number was not correlated with power. Moreover, Geobacter and Desulfuromonas abundance increased with the drop in potential on the anode and with the presence of fermentative microorganisms. Electrochemical impedance spectroscopy (EIS) showed that biofilm resistance decreased with the abundance of electroactive bacteria. All these results showed that the electrical gradient arising from collectors shapes microbial communities. Consequently, current collectors influence the performance of carbon-based anodes for full-scale MFC applications. Full article
(This article belongs to the Special Issue Electrochemical Sensors and Cells for Environmental Applications)
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14 pages, 5388 KiB  
Article
Electrochemical Analysis of Sulfisoxazole Using Glassy Carbon Electrode (GCE) and MWCNTs/Rare Earth Oxide (CeO2 and Yb2O3) Modified-GCE Sensors
by Marwa El-Azazy, Insharah Ahsan and Nasr Bensalah
Molecules 2022, 27(6), 2033; https://doi.org/10.3390/molecules27062033 - 21 Mar 2022
Cited by 4 | Viewed by 2186
Abstract
In this work, new electrochemical sensors based on the modification of glassy carbon electrode (GCE) with multiwalled carbon nanotubes (MWCNTs)—rare metal oxides (REMO) nanocomposites were fabricated by drop-to-drop method of MWCNTs-REMO dispersion in ethanol. REMO nanoparticles were synthesized by precipitation followed by hydrothermal [...] Read more.
In this work, new electrochemical sensors based on the modification of glassy carbon electrode (GCE) with multiwalled carbon nanotubes (MWCNTs)—rare metal oxides (REMO) nanocomposites were fabricated by drop-to-drop method of MWCNTs-REMO dispersion in ethanol. REMO nanoparticles were synthesized by precipitation followed by hydrothermal treatment at 180 °C in absence and presence of TritonTM X-100 surfactant. Cyclic voltammetry (CV) analysis using MWCNTs-CeO2@GCE and MWCNTs-Yb2O3@GCE sensors were used for the analysis of sulfisoxazole (SFX) drug in water samples. The results of CV analysis showed that MWCNTs-REMO@GCE sensors have up to 40-fold higher sensitivity with CeO2 compared to the bare GCE sensor. The estimated values of the limit of detection (LoD) of this electrochemical sensing using MWCNTs-CeO2@GCE and MWCNTs-Yb2O3@GCE electrodes reached 0.4 and 0.7 μM SFX in phosphate buffer pH = 7, respectively. These findings indicate that MWCNTs-REMO@GCE electrodes are potential sensors for analysis of sulfonamide drugs in water and biological samples. Full article
(This article belongs to the Special Issue Electrochemical Sensors and Cells for Environmental Applications)
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17 pages, 3687 KiB  
Article
Mathematical Modelling of Glyphosate Molecularly Imprinted Polymer-Based Microsensor with Multiple Phenomena
by Fares Zouaoui, Saliha Bourouina-Bacha, Mustapha Bourouina, Nadia Zine, Abdelhamid Errachid and Nicole Jaffrezic-Renault
Molecules 2022, 27(2), 493; https://doi.org/10.3390/molecules27020493 - 13 Jan 2022
Cited by 5 | Viewed by 1541
Abstract
The massive and careless use of glyphosate (GLY) in agricultural production raises many questions regarding environmental pollution and health risks, it is then important to develop simple methods to detect it. Electrochemical impedance spectroscopy (EIS) is an effective analytical tool for characterizing properties [...] Read more.
The massive and careless use of glyphosate (GLY) in agricultural production raises many questions regarding environmental pollution and health risks, it is then important to develop simple methods to detect it. Electrochemical impedance spectroscopy (EIS) is an effective analytical tool for characterizing properties at the electrode/electrolyte interface. It is useful as an analytical procedure, but it can also help in the interpretation of the involved fundamental electrochemical and electronic processes. In this study, the impedance data obtained experimentally for a microsensor based on molecularly imprinted chitosan graft on 4-aminophenylacetic acid for the detection of glyphosate was analyzed using an exact mathematical model based on physical theories. The procedure for modeling experimental responses is well explained. The analysis of the observed impedance response leads to estimations of the microscopic parameters linked to the faradic and capacitive current. The interaction of glyphosate molecules with the imprinted sites of the CS-MIPs film is observed in the high frequency range. The relative variation of the charge transfer resistance is proportional to the log of the concentration of glyphosate. The capacitance decreases as the concentration of glyphosate increases, which is explained by the discharging of the charged imprinted sites when the glyphosate molecule interacts with the imprinted sites through electrostatic interactions. The phenomenon of adsorption of the ions in the CMA film is observed in the low frequency range, this phenomenon being balanced by the electrostatic interaction of glyphosate with the imprinted sites in the CS-MIPs film. Full article
(This article belongs to the Special Issue Electrochemical Sensors and Cells for Environmental Applications)
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