Flexible Miniaturized Electrochemical Sensors Based on Multiwalled Carbon Nanotube-Chitosan Nanomaterial for Determination of Nitrite in Soil Solutions
Flexible screen-printed electrodes (SPE) were modified in a simple manner with different composite nanomaterials based on carbon allotropes, polymers, and metallic nanoparticles, for amperometric detection of nitrites in soil. Multiwalled carbon nanotubes (MWCNT), chitosan (CS), silver nanoparticles...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-04-01
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| Series: | Chemosensors |
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| Online Access: | https://www.mdpi.com/2227-9040/11/4/224 |
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| author | Ana-Maria Gurban Lucian-Gabriel Zamfir Petru Epure Ioana-Raluca Șuică-Bunghez Raluca Mădălina Senin Maria-Luiza Jecu Maria Lorena Jinga Mihaela Doni |
| author_facet | Ana-Maria Gurban Lucian-Gabriel Zamfir Petru Epure Ioana-Raluca Șuică-Bunghez Raluca Mădălina Senin Maria-Luiza Jecu Maria Lorena Jinga Mihaela Doni |
| author_sort | Ana-Maria Gurban |
| collection | DOAJ |
| description | Flexible screen-printed electrodes (SPE) were modified in a simple manner with different composite nanomaterials based on carbon allotropes, polymers, and metallic nanoparticles, for amperometric detection of nitrites in soil. Multiwalled carbon nanotubes (MWCNT), chitosan (CS), silver nanoparticles (AgNPs), 1,8-diaminonaphthalene (1,8-DAN), and a sol-gel (SG) matrix were used for modification of the carbon paste working electrodes. Sensitive and selective detection of nitrite was achieved by using a MWCNT-CS-modified sensor, in acetate buffer at pH 5, at an applied potential of 0.58 V vs. Ag/AgCl. The MWCNT-CS-based sensor displayed a specific sensitivity of 204.4 mA·M<sup>−1</sup>·cm<sup>−2</sup>, with a detection limit of 2.3 µM (S/N = 3) in a linear range up to 1.7 mM, showing good stability, reproducibility, and selectivity towards other interfering species. A miniaturized portable system using the developed flexible electrochemical MWCNT-CS-based sensors was dedicated for the detection of nitrite in different samples of soil solutions extracted by using suction lysimeters. |
| first_indexed | 2024-03-11T05:08:11Z |
| format | Article |
| id | doaj.art-898e5a564b95469085902967f0cf0806 |
| institution | Directory Open Access Journal |
| issn | 2227-9040 |
| language | English |
| last_indexed | 2024-03-11T05:08:11Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Chemosensors |
| spelling | doaj.art-898e5a564b95469085902967f0cf08062023-11-17T18:44:38ZengMDPI AGChemosensors2227-90402023-04-0111422410.3390/chemosensors11040224Flexible Miniaturized Electrochemical Sensors Based on Multiwalled Carbon Nanotube-Chitosan Nanomaterial for Determination of Nitrite in Soil SolutionsAna-Maria Gurban0Lucian-Gabriel Zamfir1Petru Epure2Ioana-Raluca Șuică-Bunghez3Raluca Mădălina Senin4Maria-Luiza Jecu5Maria Lorena Jinga6Mihaela Doni7National Research & Development Institute for Chemistry & Petrochemistry—ICECHIM, 202 Spl. Independentei, 060021 Bucharest, RomaniaNational Research & Development Institute for Chemistry & Petrochemistry—ICECHIM, 202 Spl. Independentei, 060021 Bucharest, RomaniaEPI-SISTEM SRL, 17A Livezii, Săcele, 505600 Brașov, RomaniaNational Research & Development Institute for Chemistry & Petrochemistry—ICECHIM, 202 Spl. Independentei, 060021 Bucharest, RomaniaNational Research & Development Institute for Chemistry & Petrochemistry—ICECHIM, 202 Spl. Independentei, 060021 Bucharest, RomaniaNational Research & Development Institute for Chemistry & Petrochemistry—ICECHIM, 202 Spl. Independentei, 060021 Bucharest, RomaniaNational Research & Development Institute for Chemistry & Petrochemistry—ICECHIM, 202 Spl. Independentei, 060021 Bucharest, RomaniaNational Research & Development Institute for Chemistry & Petrochemistry—ICECHIM, 202 Spl. Independentei, 060021 Bucharest, RomaniaFlexible screen-printed electrodes (SPE) were modified in a simple manner with different composite nanomaterials based on carbon allotropes, polymers, and metallic nanoparticles, for amperometric detection of nitrites in soil. Multiwalled carbon nanotubes (MWCNT), chitosan (CS), silver nanoparticles (AgNPs), 1,8-diaminonaphthalene (1,8-DAN), and a sol-gel (SG) matrix were used for modification of the carbon paste working electrodes. Sensitive and selective detection of nitrite was achieved by using a MWCNT-CS-modified sensor, in acetate buffer at pH 5, at an applied potential of 0.58 V vs. Ag/AgCl. The MWCNT-CS-based sensor displayed a specific sensitivity of 204.4 mA·M<sup>−1</sup>·cm<sup>−2</sup>, with a detection limit of 2.3 µM (S/N = 3) in a linear range up to 1.7 mM, showing good stability, reproducibility, and selectivity towards other interfering species. A miniaturized portable system using the developed flexible electrochemical MWCNT-CS-based sensors was dedicated for the detection of nitrite in different samples of soil solutions extracted by using suction lysimeters.https://www.mdpi.com/2227-9040/11/4/224flexible sensorsMWCNT-chitosan nanocompositenitritesoil solutionlysimeter |
| spellingShingle | Ana-Maria Gurban Lucian-Gabriel Zamfir Petru Epure Ioana-Raluca Șuică-Bunghez Raluca Mădălina Senin Maria-Luiza Jecu Maria Lorena Jinga Mihaela Doni Flexible Miniaturized Electrochemical Sensors Based on Multiwalled Carbon Nanotube-Chitosan Nanomaterial for Determination of Nitrite in Soil Solutions Chemosensors flexible sensors MWCNT-chitosan nanocomposite nitrite soil solution lysimeter |
| title | Flexible Miniaturized Electrochemical Sensors Based on Multiwalled Carbon Nanotube-Chitosan Nanomaterial for Determination of Nitrite in Soil Solutions |
| title_full | Flexible Miniaturized Electrochemical Sensors Based on Multiwalled Carbon Nanotube-Chitosan Nanomaterial for Determination of Nitrite in Soil Solutions |
| title_fullStr | Flexible Miniaturized Electrochemical Sensors Based on Multiwalled Carbon Nanotube-Chitosan Nanomaterial for Determination of Nitrite in Soil Solutions |
| title_full_unstemmed | Flexible Miniaturized Electrochemical Sensors Based on Multiwalled Carbon Nanotube-Chitosan Nanomaterial for Determination of Nitrite in Soil Solutions |
| title_short | Flexible Miniaturized Electrochemical Sensors Based on Multiwalled Carbon Nanotube-Chitosan Nanomaterial for Determination of Nitrite in Soil Solutions |
| title_sort | flexible miniaturized electrochemical sensors based on multiwalled carbon nanotube chitosan nanomaterial for determination of nitrite in soil solutions |
| topic | flexible sensors MWCNT-chitosan nanocomposite nitrite soil solution lysimeter |
| url | https://www.mdpi.com/2227-9040/11/4/224 |
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