Journal
NEW JOURNAL OF CHEMISTRY
Volume 45, Issue 3, Pages 1734-1742Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0nj05475e
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- Mula Stk Kocman University [19/087/02/1/2]
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In this study, a porphyrin derivative was incorporated with graphene oxide via ultrasonication to form GO-Por composite, which was used as a modifier for the construction of an electrochemical catechol sensor. The modified sensor showed significantly improved sensitivity and stability, and exhibited satisfactory performance in detecting catechol in tap water samples.
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 mu M catechol with a limit of detection of 0.063 mu M (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.
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