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Quaternary phosphonium-based (TPQPCl)-ionomer/graphite nanoplatelets composite chemically modified electrodes: a novel platform for sensing applications
Journal of Materials Chemistry C, Volume: 6, Issue: 48, Pages: 13293 - 13304
Swansea University Authors:
Sandra Hernandez Aldave, Paolo Bertoncello
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DOI (Published version): 10.1039/c8tc04967j
Abstract
Ionomers have attracted considerable interest in electroanalysis due to the possibility of fabricating electrode coatings capable of preconcentrating sub-micromolar concentrations of cations or anions of analytical relevance. In this work, we describe the electroanalytical performances of an ionomer...
| Published in: | Journal of Materials Chemistry C |
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| ISSN: | 2050-7526 2050-7534 |
| Published: |
2018
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa45892 |
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| Abstract: |
Ionomers have attracted considerable interest in electroanalysis due to the possibility of fabricating electrode coatings capable of preconcentrating sub-micromolar concentrations of cations or anions of analytical relevance. In this work, we describe the electroanalytical performances of an ionomer (TPQPCl)/graphite nanoplatelets composite material towards the development of an amperometric sensor for detection of ascorbic acid. Graphite nanoplatelets at different concentrations were dispersed in ethanolic solutions containing TPQPCl. The as-prepared TPQPCl/graphite nanoplatelet-coated electrodes were characterised using Fe(CN)64−/3− as an anionic redox probe. The results evidence the good preconcentration capability of the positively charged TPQPCl towards the incorporation of negatively charged species. By tuning the ionomer/graphite nanoplatelets ratio, it is possible to detect simultaneously ascorbic acid even in the presence of dopamine as an interference species. The TPQPCl/graphite nanoplatelet-coated electrodes were able to detect ascorbic acid in the linear range of 5–10 000 μM with a limit of detection calculated as 4.8 μM using linear sweep voltammetry. Finally, the TPQPCl/graphite nanoplatelet-coated electrodes were tested towards detection of ascorbic acid in vitamin C tablets and orange juice without any sample pretreatment. |
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| Keywords: |
ionomer membranes, sensors |
| College: |
Faculty of Science and Engineering |
| Funders: |
EPSRC: EP/L013797/1, "Nanostructured Conductive Anion Exchange Composite Thin Films for Electrocatalytic Applications" |
| Issue: |
48 |
| Start Page: |
13293 |
| End Page: |
13304 |