Synthesis of glutamine-based green emitting carbon quantum dots as a fluorescent nanoprobe for the determination of iron (Fe3+) in Solanum tuberrosum (potato)
| dc.creator | Aladesuyi, O., Oluwafemi, Oluwatobi S. | |
| dc.date | 2023-07-29 | |
| dc.date.accessioned | 2025-04-15T12:08:43Z | |
| dc.description | Herein, we reported the use of N-doped green-emitting carbon quantum dots (N-CQDs) as a fluorescent probe for determining of Fe3+ ions in Solanum tuberosum for the first time. The NCQDs were synthesised through an efficient, one-step, and safe hydrothermal technique using citric acid as the carbon source and glutamine as a novel nitrogen source. The temporal evolution of the optical properties was investigated by varying the synthetic conditions with respect to temperature (160 ◦C, 180 ◦C, 200 ◦C, 220 ◦C and 240 ◦C) and citric acid: glutamine precursor ratio (1:1, 1:1.5, l.2,1:3 and 1:4). The N-CQDs was characterised using Fourier-Transform Infrared Spectroscopy (FTIR) High-resolution transmission electron microscope (HRTEM), ultraviolet– visible spectroscopy (UV–vis) and X-Ray diffraction analysis (XRD) while its stability was evaluated in different media; NaCl, Roswell Park Memorial Institute (RPMI) and Phosphate Buffered Saline (PBS), and at different pHs. The N-CQDs displayed green (525 nm) emission and were spherical with an average particle diameter of 3.41 ± 0.76 nm. The FTIR indicated carboxylic, amino, and hydroxyl functional groups. The as-synthesised N-CQDs were stable in NaCl (up to 1 M), RPMI, and PBS without any significant change in its fluorescent intensity. The pH evaluation showed pHs 6 and 7 as the optimum pHs, while the fluorometric analysis showed selectivity towards Fe 3+ in the presence and absence of interfering ions. The detection limit of 1.05 μM was calculated, and the photoluminescence mechanism revealed static quenching. The as-synthesised N-CQDs was used as a fluorescent nanoprobe to determine the amount of Fe3+ in Solanum tuberosum (Potatoes) tubers. The result showed a high level of accuracy (92.13–96.20%) when compared with an established standard analytical procedure with excellent recoveries of 99.23–103.9%. We believe the as-synthesised N-CQDs can be utilised as a reliable and fast fluorescence nanoprobe for the determining of Fe3+ ions | |
| dc.format | application/pdf | |
| dc.identifier | http://eprints.covenantuniversity.edu.ng/18330/ | |
| dc.identifier.uri | https://repository.covenantuniversity.edu.ng/handle/123456789/48918 | |
| dc.language | en | |
| dc.publisher | Science Direct | |
| dc.subject | Q Science (General), QD Chemistry | |
| dc.title | Synthesis of glutamine-based green emitting carbon quantum dots as a fluorescent nanoprobe for the determination of iron (Fe3+) in Solanum tuberrosum (potato) | |
| dc.type | Article |
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