Graphene oxide–porphyrin composite nanostructure included electrochemical sensor for catechol detection
| Autor: | Tuğba Ören Varol, Ülkü Anik, Özgül Hakli |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Detection limit
Catechol Scanning electron microscope Graphene Inorganic chemistry Oxide 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Porphyrin Catalysis 0104 chemical sciences law.invention Electrochemical gas sensor chemistry.chemical_compound chemistry law Materials Chemistry Fourier transform infrared spectroscopy 0210 nano-technology |
| Zdroj: | New Journal of Chemistry. 45:1734-1742 |
| ISSN: | 1369-9261 1144-0546 |
| Popis: | In this study, pre-synthesized 5,10,15-tri(4-tert-butylphenyl)-20-(4-phenol)-porphyrin (Por) was incorporated with graphene oxide (GO) via ultrasonication and, as a result, GO–Por was obtained. Morphological and structural characterizations of GO–Por were performed using scanning electron microscopy, Fourier transform infrared spectroscopy and ultraviolet-visible spectroscopy, demonstrating that the porphyrin derivative was attached to GO. The resulting GO–Por composite was utilized as the modifier for the construction of a carbon felt based electrochemical catechol sensor. The GO–Por modified sensor exhibited a nearly 10-fold increment in the oxidation peak current accompanying a 31 mV negative shift in the oxidation potential as compared with the unmodified sensor. A linear response in the range of 5–250 μM catechol with a limit of detection of 0.063 μM (n = 3) was obtained with the proposed method. The GO–Por modified carbon felt sensor was also applied for catechol detection in tap water samples and very satisfactory recovery values were obtained. |
| Databáze: | OpenAIRE |
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