Electrochemical Sensors Based on Single-Wall Carbon Nanotubes in Voltammetric Ascorbic Acid Tests
Modern highly sensitive and selective sensors are able to determine biologically active substances, which makes this direction one of the most popular areas of analytical chemistry. The study featured the electrochemical properties of new fiber materials based on single-wall carbon nanotubes with pr...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Kemerovo State University
2023-12-01
|
| Series: | Техника и технология пищевых производств |
| Subjects: | |
| Online Access: | https://fptt.ru/en/issues/22269/22261/ |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832544287664898048 |
|---|---|
| author | Natalia V. Ivanova Elizaveta A. Martynova Anna I. Vershinina Maksim V. Lomakin Galina O. Eremeeva Olesya R. Gordaya Sergey D. Shandakov |
| author_facet | Natalia V. Ivanova Elizaveta A. Martynova Anna I. Vershinina Maksim V. Lomakin Galina O. Eremeeva Olesya R. Gordaya Sergey D. Shandakov |
| author_sort | Natalia V. Ivanova |
| collection | DOAJ |
| description | Modern highly sensitive and selective sensors are able to determine biologically active substances, which makes this direction one of the most popular areas of analytical chemistry. The study featured the electrochemical properties of new fiber materials based on single-wall carbon nanotubes with prospects of using them in the voltammetry of ascorbic acid. The authors developed a new technology to synthesize films from disordered single-wall carbon nanotubes by chemical vapor deposition. Fibers were produced from a solvent by wet-pulling of single-wall carbon nanotubes networks. Thin films of randomly oriented single-wall carbon nanotube bundles were deposited downstream of a floating aerosol CVD reactor, which included a high temperature furnace with a quartz tube. The synthesis of the single-wall carbon nanotube samples was performed at 825°C. Ethanol served as carbon source while ferrocene was used as catalyst precursor. The single-wall carbon nanotubes were collected on a nitrocellulose filter in the form of films with transmittances of 10% in the middle of the visible wavelength (550 nm). The method was optimized to involve air annealing at 300–320°C and a treatment with strong inorganic acids, i.e., HCl, HNO3 + H2 SO4 . The voltammetric curves recording included background electrolyte, scan rate, and preconditioning. These parameters were selected experimentally to obtain the maximal sensor response to ascorbic acid content. The anodic peak of ascorbic acid in the phosphate buffer electrolyte (pH 6.86) was observed at a potential of +0.2 V. The current and peak area of ascorbic acid oxidation depended neither on the time nor on the conditioning potential of the sensor. The linear dependences of these parameters on the concentration of ascorbic acid stayed within 50–500 μmol/L (8.8–90 mg/L) at а scan rate of 0.1 mV/s. The single-wall carbon nanotube microsensor had a length of 0.5 cm and an average width of 400 μm. Its sensitivity was two times as high as that of a disk glassy carbon electrode with a diameter of 5 mm. The experimental sensors proved effective in determining ascorbic acid in food products, pharmaceuticals, and biological fluids. |
| format | Article |
| id | doaj-art-aeecbd07eb0044a694a0cb12dcb7ef28 |
| institution | Kabale University |
| issn | 2074-9414 2313-1748 |
| language | English |
| publishDate | 2023-12-01 |
| publisher | Kemerovo State University |
| record_format | Article |
| series | Техника и технология пищевых производств |
| spelling | doaj-art-aeecbd07eb0044a694a0cb12dcb7ef282025-02-03T10:40:44ZengKemerovo State UniversityТехника и технология пищевых производств2074-94142313-17482023-12-0153482483110.21603/2074-9414-2023-4-2482Electrochemical Sensors Based on Single-Wall Carbon Nanotubes in Voltammetric Ascorbic Acid TestsNatalia V. Ivanova0https://orcid.org/0000-0002-6206-3504Elizaveta A. Martynova1Anna I. Vershinina2https://orcid.org/0000-0001-6561-0924Maksim V. Lomakin3https://orcid.org/0000-0001-6544-3687Galina O. Eremeeva4https://orcid.org/0000-0003-0188-0065Olesya R. Gordaya5https://orcid.org/0000-0002-9293-9271Sergey D. Shandakov6https://orcid.org/0000-0001-7902-1178Kemerovo State University , Kemerovo, RussiaKemerovo State University , Kemerovo, RussiaKemerovo State University , Kemerovo, RussiaKemerovo State University , Kemerovo, RussiaKemerovo State University , Kemerovo, RussiaKemerovo State University , Kemerovo, RussiaKemerovo State University , Kemerovo, RussiaModern highly sensitive and selective sensors are able to determine biologically active substances, which makes this direction one of the most popular areas of analytical chemistry. The study featured the electrochemical properties of new fiber materials based on single-wall carbon nanotubes with prospects of using them in the voltammetry of ascorbic acid. The authors developed a new technology to synthesize films from disordered single-wall carbon nanotubes by chemical vapor deposition. Fibers were produced from a solvent by wet-pulling of single-wall carbon nanotubes networks. Thin films of randomly oriented single-wall carbon nanotube bundles were deposited downstream of a floating aerosol CVD reactor, which included a high temperature furnace with a quartz tube. The synthesis of the single-wall carbon nanotube samples was performed at 825°C. Ethanol served as carbon source while ferrocene was used as catalyst precursor. The single-wall carbon nanotubes were collected on a nitrocellulose filter in the form of films with transmittances of 10% in the middle of the visible wavelength (550 nm). The method was optimized to involve air annealing at 300–320°C and a treatment with strong inorganic acids, i.e., HCl, HNO3 + H2 SO4 . The voltammetric curves recording included background electrolyte, scan rate, and preconditioning. These parameters were selected experimentally to obtain the maximal sensor response to ascorbic acid content. The anodic peak of ascorbic acid in the phosphate buffer electrolyte (pH 6.86) was observed at a potential of +0.2 V. The current and peak area of ascorbic acid oxidation depended neither on the time nor on the conditioning potential of the sensor. The linear dependences of these parameters on the concentration of ascorbic acid stayed within 50–500 μmol/L (8.8–90 mg/L) at а scan rate of 0.1 mV/s. The single-wall carbon nanotube microsensor had a length of 0.5 cm and an average width of 400 μm. Its sensitivity was two times as high as that of a disk glassy carbon electrode with a diameter of 5 mm. The experimental sensors proved effective in determining ascorbic acid in food products, pharmaceuticals, and biological fluids.https://fptt.ru/en/issues/22269/22261/carbon nanotubessensorsvoltammetryascorbic acid |
| spellingShingle | Natalia V. Ivanova Elizaveta A. Martynova Anna I. Vershinina Maksim V. Lomakin Galina O. Eremeeva Olesya R. Gordaya Sergey D. Shandakov Electrochemical Sensors Based on Single-Wall Carbon Nanotubes in Voltammetric Ascorbic Acid Tests Техника и технология пищевых производств carbon nanotubes sensors voltammetry ascorbic acid |
| title | Electrochemical Sensors Based on Single-Wall Carbon Nanotubes in Voltammetric Ascorbic Acid Tests |
| title_full | Electrochemical Sensors Based on Single-Wall Carbon Nanotubes in Voltammetric Ascorbic Acid Tests |
| title_fullStr | Electrochemical Sensors Based on Single-Wall Carbon Nanotubes in Voltammetric Ascorbic Acid Tests |
| title_full_unstemmed | Electrochemical Sensors Based on Single-Wall Carbon Nanotubes in Voltammetric Ascorbic Acid Tests |
| title_short | Electrochemical Sensors Based on Single-Wall Carbon Nanotubes in Voltammetric Ascorbic Acid Tests |
| title_sort | electrochemical sensors based on single wall carbon nanotubes in voltammetric ascorbic acid tests |
| topic | carbon nanotubes sensors voltammetry ascorbic acid |
| url | https://fptt.ru/en/issues/22269/22261/ |
| work_keys_str_mv | AT nataliavivanova electrochemicalsensorsbasedonsinglewallcarbonnanotubesinvoltammetricascorbicacidtests AT elizavetaamartynova electrochemicalsensorsbasedonsinglewallcarbonnanotubesinvoltammetricascorbicacidtests AT annaivershinina electrochemicalsensorsbasedonsinglewallcarbonnanotubesinvoltammetricascorbicacidtests AT maksimvlomakin electrochemicalsensorsbasedonsinglewallcarbonnanotubesinvoltammetricascorbicacidtests AT galinaoeremeeva electrochemicalsensorsbasedonsinglewallcarbonnanotubesinvoltammetricascorbicacidtests AT olesyargordaya electrochemicalsensorsbasedonsinglewallcarbonnanotubesinvoltammetricascorbicacidtests AT sergeydshandakov electrochemicalsensorsbasedonsinglewallcarbonnanotubesinvoltammetricascorbicacidtests |