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Decoupling photonic and thermal contributions for photoelectrochemical sensing of melatonin via graphene oxide nanoribbons
- Source :
- Electrochemistry Communications, Vol 159, Iss , Pp 107649- (2024)
- Publication Year :
- 2024
- Publisher :
- Elsevier, 2024.
-
Abstract
- This work elucidates the photoelectrochemical (PEC) sensing of melatonin employing graphene oxide nanoribbons (GONRs) synthesized through a microwave-assisted method. GONRs served as electrocatalysts for screen-printed carbon electrodes (SPCE) to facilitate melatonin detection. We incorporated both a light-emitting diode (LED) and a solar simulator as light sources for PEC evaluations. Cyclic voltammetry revealed that the faradaic currents corresponding to melatonin oxidation on GONRs-modified SPCE were amplified under both LED and simulated solar light irradiation. Notably, the GONR (150 W) registered the most pronounced enhancement in the photo-assisted faradaic current and the highest conversion efficiency. Employing the solar simulator, certain thermal factor ratios concerning conversion efficiencies surpassed 50.0% at light intensities of both 80 mW/cm2 and 100 mW/cm2. Conversely, with the LED source, the thermal contribution remained below 15.0% of the total PEC faradaic current. We posit that obtaining conversion efficiencies devoid of thermal influences is pivotal for deepening our comprehension of PEC biosensing mechanisms.
Details
- Language :
- English
- ISSN :
- 13882481
- Volume :
- 159
- Issue :
- 107649-
- Database :
- Directory of Open Access Journals
- Journal :
- Electrochemistry Communications
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.442b2b1756ff4961835794ba8ec2c1a9
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.elecom.2023.107649