1. An Enhanced Photosensitive Sensor Based on ITO/MWCNTs@Polymer Composite@BiVO 4 for Quercetin Detection.
- Author
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Sarikaya, İrem, Kaleoğlu, Esra, Çakar, Soner, Soykan, Cengiz, and Özacar, Mahmut
- Subjects
POLYACRYLONITRILES ,QUERCETIN ,MELANOPSIN ,MULTIWALLED carbon nanotubes ,DETECTORS ,FREE radicals ,FOOD consumption - Abstract
The fact that antioxidants scavenge free radicals in the human body and naturally treat many health problems that will occur in this way has increased the consumption of antioxidant-containing foods. However, consumption of artificially prepared antioxidants could cause cancer. Therefore, antioxidants from natural sources are preferred. Quercetin is an antioxidant present in natural samples. In this article, multi-walled carbon nanotubes (MWCNTs), a polymer composite (PC) consisting of a mixture of 15% (by mass) polystyrene (PST), 15% (by mass) polyacrylonitrile (PAN) and 70% (by mass) polyindole (PIN), and semiconducting BiVO
4 were used to prepare electrodes, and then a photosensitive ITO/MWCNTs@PC@BiVO4 -based sensor was fabricated for quercetin detection. Quercetin was analyzed via the photosensitive ITO/MWCNTs@PC@BiVO4 sensor in 0.1 M phosphate buffered saline (pH 7.4) solutions including various quercetin concentrations. The constructed quercetin sensor displayed a wide linear response between 10 and 200 μM and a limit of detection of 0.133 μM. The developed photosensitive ITO/MWCNTs@PC@BiVO4 demonstrated a high sensitivity (442 µA mM−1 cm−2 ), good reproducibility (relative standard deviation 3.6%), high selectivity and long-term stability (>49 days) towards quercetin sensing. The photoelectrochemical sensor was then applied to detection of quercetin in black tea as a real-life sample. Our study could lead to the development of novel photosensitive PC polyphenol sensors. [ABSTRACT FROM AUTHOR]- Published
- 2023
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