The New Reliable pH Sensor Based on Hydrous Iridium Dioxide and Its Composites
The new reliable sensor for pH determination was designed with the use of hydrous iridium dioxide and its composites. Three different hIrO<sub>2</sub>-based materials were prepared and applied as solid-contact layers in pH-selective electrodes with polymeric membrane. The material choice...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/1/192 |
| _version_ | 1797625405306306560 |
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| author | Nikola Lenar Robert Piech Beata Paczosa-Bator |
| author_facet | Nikola Lenar Robert Piech Beata Paczosa-Bator |
| author_sort | Nikola Lenar |
| collection | DOAJ |
| description | The new reliable sensor for pH determination was designed with the use of hydrous iridium dioxide and its composites. Three different hIrO<sub>2</sub>-based materials were prepared and applied as solid-contact layers in pH-selective electrodes with polymeric membrane. The material choice included standalone hydrous iridium oxide; composite material of hydrous iridium oxide, carbon nanotubes, and triple composite material composed of hydrous iridium oxide; carbon nanotubes; and poly(3-octylthiophene-2,5-diyl). The paper depicts that the addition of functional material to standalone metal oxide is beneficial for the performance of solid-state ion-selective electrodes and presents the universal approach to designing this type of sensors. Each component contributed differently to the sensors’ performance—the addition of carbon nanotubes increased the electrical capacitance of sensor (up to 400 µF) while the addition of conducting polymer allowed it to increase the contact angle of material changing its wetting properties and enhancing the stability of potentiometric response. Hydrous iridium oxide contacted electrodes exhibit linear response in wide linear range of pH (2–11) and stable potentiometric response (the lowest potential drift of 0.036 mV/h is attributed to the electrode with triple composite material). |
| first_indexed | 2024-03-11T09:56:06Z |
| format | Article |
| id | doaj.art-87ed90084ebd4504af771204f09b954c |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T09:56:06Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-87ed90084ebd4504af771204f09b954c2023-11-16T15:48:17ZengMDPI AGMaterials1996-19442022-12-0116119210.3390/ma16010192The New Reliable pH Sensor Based on Hydrous Iridium Dioxide and Its CompositesNikola Lenar0Robert Piech1Beata Paczosa-Bator2Faculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza 30, PL-30059 Krakow, PolandFaculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza 30, PL-30059 Krakow, PolandFaculty of Materials Science and Ceramics, AGH University of Science and Technology, Mickiewicza 30, PL-30059 Krakow, PolandThe new reliable sensor for pH determination was designed with the use of hydrous iridium dioxide and its composites. Three different hIrO<sub>2</sub>-based materials were prepared and applied as solid-contact layers in pH-selective electrodes with polymeric membrane. The material choice included standalone hydrous iridium oxide; composite material of hydrous iridium oxide, carbon nanotubes, and triple composite material composed of hydrous iridium oxide; carbon nanotubes; and poly(3-octylthiophene-2,5-diyl). The paper depicts that the addition of functional material to standalone metal oxide is beneficial for the performance of solid-state ion-selective electrodes and presents the universal approach to designing this type of sensors. Each component contributed differently to the sensors’ performance—the addition of carbon nanotubes increased the electrical capacitance of sensor (up to 400 µF) while the addition of conducting polymer allowed it to increase the contact angle of material changing its wetting properties and enhancing the stability of potentiometric response. Hydrous iridium oxide contacted electrodes exhibit linear response in wide linear range of pH (2–11) and stable potentiometric response (the lowest potential drift of 0.036 mV/h is attributed to the electrode with triple composite material).https://www.mdpi.com/1996-1944/16/1/192pH sensingsolid-contact electrodesiridium dioxidecomposite materialscarbon nanotubespoly(3-octylthiophene-2,5-diyl) |
| spellingShingle | Nikola Lenar Robert Piech Beata Paczosa-Bator The New Reliable pH Sensor Based on Hydrous Iridium Dioxide and Its Composites Materials pH sensing solid-contact electrodes iridium dioxide composite materials carbon nanotubes poly(3-octylthiophene-2,5-diyl) |
| title | The New Reliable pH Sensor Based on Hydrous Iridium Dioxide and Its Composites |
| title_full | The New Reliable pH Sensor Based on Hydrous Iridium Dioxide and Its Composites |
| title_fullStr | The New Reliable pH Sensor Based on Hydrous Iridium Dioxide and Its Composites |
| title_full_unstemmed | The New Reliable pH Sensor Based on Hydrous Iridium Dioxide and Its Composites |
| title_short | The New Reliable pH Sensor Based on Hydrous Iridium Dioxide and Its Composites |
| title_sort | new reliable ph sensor based on hydrous iridium dioxide and its composites |
| topic | pH sensing solid-contact electrodes iridium dioxide composite materials carbon nanotubes poly(3-octylthiophene-2,5-diyl) |
| url | https://www.mdpi.com/1996-1944/16/1/192 |
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