Composite Electrodes Based on Carbon Materials Decorated with Hg Nanoparticles for the Simultaneous Detection of Cd(II), Pb(II) and Cu(II)
Monitoring water quality has become a goal to prevent issues related to human health and environmental conditions. In this sense, the concentration of metal ions in water sources is screened, as these are considered persistent contaminants. In this work, we describe the implementation of customized...
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| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Chemosensors |
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| Online Access: | https://www.mdpi.com/2227-9040/10/4/148 |
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| author | Laia L. Fernández Julio Bastos-Arrieta Cristina Palet Mireia Baeza |
| author_facet | Laia L. Fernández Julio Bastos-Arrieta Cristina Palet Mireia Baeza |
| author_sort | Laia L. Fernández |
| collection | DOAJ |
| description | Monitoring water quality has become a goal to prevent issues related to human health and environmental conditions. In this sense, the concentration of metal ions in water sources is screened, as these are considered persistent contaminants. In this work, we describe the implementation of customized graphite electrodes decorated with two types of Hg nanoparticles (Hg-NPs), optimized toward the electrochemical detection of Cd, Pb and Cu. Here, we combine Hg, a well-known property to form alloys with other metals, with the nanoscale features of Hg-NPs, resulting in improved electrochemical sensors towards these analytes with a substantial reduction in the used Hg amount. Hg-NPs were synthesized using poly(diallyldimethylammonium) chloride (PDDA) in a combined role as a reducing and stabilizing agent, and then appropriately characterized by means of Transmission Electron Microscopy (TEM) and Zeta Potential. The surface of composite electrodes with optimized graphite content was modified by the drop-casting of the prepared Hg-NPs. The obtained nanocomposite electrodes were morphologically characterized by Scanning Electron Microscopy (SEM), and electrochemically by Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS). The results show that the Hg-NP-modified electrodes present better responses towards Cd(II), Pb(II) and Cu(II) detection in comparison with the bare graphite electrode. Analytical performance of sensors was evaluated by square-wave anodic stripping voltammetry (SWASV), obtaining a linear range of 0.005–0.5 mg·L<sup>−1</sup> for Cd<sup>2+</sup>, of 0.028–0.37 mg·L<sup>−1</sup> for Pb<sup>2+</sup> and of 0.057–1.1 mg·L<sup>−1</sup> for Cu<sup>2+</sup>. Real samples were analyzed using SWASV, showing good agreement with the recovery values of inductively coupled plasma–mass spectrometry (ICP-MS) measurements. |
| first_indexed | 2024-03-09T11:01:31Z |
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| id | doaj.art-c428e4917d234d3d8e517564b674c868 |
| institution | Directory Open Access Journal |
| issn | 2227-9040 |
| language | English |
| last_indexed | 2024-03-09T11:01:31Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Chemosensors |
| spelling | doaj.art-c428e4917d234d3d8e517564b674c8682023-12-01T01:16:57ZengMDPI AGChemosensors2227-90402022-04-0110414810.3390/chemosensors10040148Composite Electrodes Based on Carbon Materials Decorated with Hg Nanoparticles for the Simultaneous Detection of Cd(II), Pb(II) and Cu(II)Laia L. Fernández0Julio Bastos-Arrieta1Cristina Palet2Mireia Baeza3GTS Research Group, Department of Chemistry, Faculty of Science, Edifici C-Nord, Universitat Autònoma de Barcelona, Carrer dels Til⋅lers, 08193 Bellaterra, SpainGrup d’Electroanàlisi, Department of Chemical Engineering and Analytical Chemistry, Universitat de Barcelona, Carrer Martí i Franqués 1-11, 08028 Barcelona, SpainGTS Research Group, Department of Chemistry, Faculty of Science, Edifici C-Nord, Universitat Autònoma de Barcelona, Carrer dels Til⋅lers, 08193 Bellaterra, SpainGENOCOV Research Group, Department of Chemistry, Faculty of Science, Edifici C-Nord, Universitat Autònoma de Barcelona, Carrer dels Til⋅lers, 08193 Bellaterra, SpainMonitoring water quality has become a goal to prevent issues related to human health and environmental conditions. In this sense, the concentration of metal ions in water sources is screened, as these are considered persistent contaminants. In this work, we describe the implementation of customized graphite electrodes decorated with two types of Hg nanoparticles (Hg-NPs), optimized toward the electrochemical detection of Cd, Pb and Cu. Here, we combine Hg, a well-known property to form alloys with other metals, with the nanoscale features of Hg-NPs, resulting in improved electrochemical sensors towards these analytes with a substantial reduction in the used Hg amount. Hg-NPs were synthesized using poly(diallyldimethylammonium) chloride (PDDA) in a combined role as a reducing and stabilizing agent, and then appropriately characterized by means of Transmission Electron Microscopy (TEM) and Zeta Potential. The surface of composite electrodes with optimized graphite content was modified by the drop-casting of the prepared Hg-NPs. The obtained nanocomposite electrodes were morphologically characterized by Scanning Electron Microscopy (SEM), and electrochemically by Cyclic Voltammetry (CV) and Electrochemical Impedance Spectroscopy (EIS). The results show that the Hg-NP-modified electrodes present better responses towards Cd(II), Pb(II) and Cu(II) detection in comparison with the bare graphite electrode. Analytical performance of sensors was evaluated by square-wave anodic stripping voltammetry (SWASV), obtaining a linear range of 0.005–0.5 mg·L<sup>−1</sup> for Cd<sup>2+</sup>, of 0.028–0.37 mg·L<sup>−1</sup> for Pb<sup>2+</sup> and of 0.057–1.1 mg·L<sup>−1</sup> for Cu<sup>2+</sup>. Real samples were analyzed using SWASV, showing good agreement with the recovery values of inductively coupled plasma–mass spectrometry (ICP-MS) measurements.https://www.mdpi.com/2227-9040/10/4/148Hg nanoparticleselectrode surface modificationnanocomposite graphite electrodesquare-wave anodic stripping voltammetrycyclic voltammetrysimultaneous metal detection |
| spellingShingle | Laia L. Fernández Julio Bastos-Arrieta Cristina Palet Mireia Baeza Composite Electrodes Based on Carbon Materials Decorated with Hg Nanoparticles for the Simultaneous Detection of Cd(II), Pb(II) and Cu(II) Chemosensors Hg nanoparticles electrode surface modification nanocomposite graphite electrode square-wave anodic stripping voltammetry cyclic voltammetry simultaneous metal detection |
| title | Composite Electrodes Based on Carbon Materials Decorated with Hg Nanoparticles for the Simultaneous Detection of Cd(II), Pb(II) and Cu(II) |
| title_full | Composite Electrodes Based on Carbon Materials Decorated with Hg Nanoparticles for the Simultaneous Detection of Cd(II), Pb(II) and Cu(II) |
| title_fullStr | Composite Electrodes Based on Carbon Materials Decorated with Hg Nanoparticles for the Simultaneous Detection of Cd(II), Pb(II) and Cu(II) |
| title_full_unstemmed | Composite Electrodes Based on Carbon Materials Decorated with Hg Nanoparticles for the Simultaneous Detection of Cd(II), Pb(II) and Cu(II) |
| title_short | Composite Electrodes Based on Carbon Materials Decorated with Hg Nanoparticles for the Simultaneous Detection of Cd(II), Pb(II) and Cu(II) |
| title_sort | composite electrodes based on carbon materials decorated with hg nanoparticles for the simultaneous detection of cd ii pb ii and cu ii |
| topic | Hg nanoparticles electrode surface modification nanocomposite graphite electrode square-wave anodic stripping voltammetry cyclic voltammetry simultaneous metal detection |
| url | https://www.mdpi.com/2227-9040/10/4/148 |
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