Double-reverse-signal ratiometric fluorescence probe for residual determination of chlorpyrifos pesticide in surface water based on scalable upcycling of rice straw to luminescent CQDs via energy-efficient alkali treatment
A smart, green, practical, and simple method has been developed for the preparation of blue emissive carbon dots (RS-CDs). The developed synthesis protocol is accomplished at room temperature via an instrument-free approach using the alkali treatment of rice straw. The furnished RS-CDs were thorough...
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Elsevier
2025-08-01
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S266683192500030X |
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| author | Rania El-Shaheny Lateefa Al-Khateeb Mahmoud El-Maghrabey Galal Magdy Heba M. Hashem |
| author_facet | Rania El-Shaheny Lateefa Al-Khateeb Mahmoud El-Maghrabey Galal Magdy Heba M. Hashem |
| author_sort | Rania El-Shaheny |
| collection | DOAJ |
| description | A smart, green, practical, and simple method has been developed for the preparation of blue emissive carbon dots (RS-CDs). The developed synthesis protocol is accomplished at room temperature via an instrument-free approach using the alkali treatment of rice straw. The furnished RS-CDs were thoroughly characterized via transmission electron microscopy, energy-dispersive X-ray spectrometry, x-ray photoelectron spectroscopy, UV-Vis, and fluorescence spectroscopy. The RS-CDs exhibited excellent performance as a double-response-reverse type ratiometric fluorescence probe for the widely used insecticide chlorpyrifos. By systematically investigating and optimizing the experimental conditions, a new sensitive and accurate RS-CDs-based ratiometric fluorescence probe was constructed, taking advantage of the simultaneous decrease of emission intensity at 396 nm and increase of a new emission peak at 340 nm upon adding chlorpyrifos. The ratio of fluorescence intensity at 340 and 396 nm (F340/396) showed excellent correlation to chlorpyrifos concentration over the range of 7.1 – 142.4 µM with a detection limit of 2.3 µM. Excellent recovery percentages have been obtained for chlorpyrifos in tap, river, and irrigation water, 102.24 ± 1.52, 104.33 ± 1.79, and 100.43 ± 2.51 %, respectively. The presented approach is the first to convert agricultural waste into nanomaterial by room temperature treatment. Boosting the value of rice straw via upcycling to luminescent CDs is one of the things that helps sustain the practice in limited-income labs. The environmental impact, greenness, practicality, economical, and analytical attributes of the developed method have been positively confirmed by different recent metrics. |
| format | Article |
| id | doaj-art-3d3175f82958481d81b11311e5b51e1f |
| institution | DOAJ |
| issn | 2666-8319 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Talanta Open |
| spelling | doaj-art-3d3175f82958481d81b11311e5b51e1f2025-08-20T02:47:04ZengElsevierTalanta Open2666-83192025-08-011110042710.1016/j.talo.2025.100427Double-reverse-signal ratiometric fluorescence probe for residual determination of chlorpyrifos pesticide in surface water based on scalable upcycling of rice straw to luminescent CQDs via energy-efficient alkali treatmentRania El-Shaheny0Lateefa Al-Khateeb1Mahmoud El-Maghrabey2Galal Magdy3Heba M. Hashem4Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt; Corresponding author at: Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt.Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi ArabiaDepartment of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt; Corresponding author at: Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt.Pharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Kafrelsheikh University, Kafrelsheikh, 33511, Egypt.Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, EgyptA smart, green, practical, and simple method has been developed for the preparation of blue emissive carbon dots (RS-CDs). The developed synthesis protocol is accomplished at room temperature via an instrument-free approach using the alkali treatment of rice straw. The furnished RS-CDs were thoroughly characterized via transmission electron microscopy, energy-dispersive X-ray spectrometry, x-ray photoelectron spectroscopy, UV-Vis, and fluorescence spectroscopy. The RS-CDs exhibited excellent performance as a double-response-reverse type ratiometric fluorescence probe for the widely used insecticide chlorpyrifos. By systematically investigating and optimizing the experimental conditions, a new sensitive and accurate RS-CDs-based ratiometric fluorescence probe was constructed, taking advantage of the simultaneous decrease of emission intensity at 396 nm and increase of a new emission peak at 340 nm upon adding chlorpyrifos. The ratio of fluorescence intensity at 340 and 396 nm (F340/396) showed excellent correlation to chlorpyrifos concentration over the range of 7.1 – 142.4 µM with a detection limit of 2.3 µM. Excellent recovery percentages have been obtained for chlorpyrifos in tap, river, and irrigation water, 102.24 ± 1.52, 104.33 ± 1.79, and 100.43 ± 2.51 %, respectively. The presented approach is the first to convert agricultural waste into nanomaterial by room temperature treatment. Boosting the value of rice straw via upcycling to luminescent CDs is one of the things that helps sustain the practice in limited-income labs. The environmental impact, greenness, practicality, economical, and analytical attributes of the developed method have been positively confirmed by different recent metrics.http://www.sciencedirect.com/science/article/pii/S266683192500030XRice strawCarbon dotsRoom temperature synthesisRatiometric fluorescence probeChlorpyrifos |
| spellingShingle | Rania El-Shaheny Lateefa Al-Khateeb Mahmoud El-Maghrabey Galal Magdy Heba M. Hashem Double-reverse-signal ratiometric fluorescence probe for residual determination of chlorpyrifos pesticide in surface water based on scalable upcycling of rice straw to luminescent CQDs via energy-efficient alkali treatment Talanta Open Rice straw Carbon dots Room temperature synthesis Ratiometric fluorescence probe Chlorpyrifos |
| title | Double-reverse-signal ratiometric fluorescence probe for residual determination of chlorpyrifos pesticide in surface water based on scalable upcycling of rice straw to luminescent CQDs via energy-efficient alkali treatment |
| title_full | Double-reverse-signal ratiometric fluorescence probe for residual determination of chlorpyrifos pesticide in surface water based on scalable upcycling of rice straw to luminescent CQDs via energy-efficient alkali treatment |
| title_fullStr | Double-reverse-signal ratiometric fluorescence probe for residual determination of chlorpyrifos pesticide in surface water based on scalable upcycling of rice straw to luminescent CQDs via energy-efficient alkali treatment |
| title_full_unstemmed | Double-reverse-signal ratiometric fluorescence probe for residual determination of chlorpyrifos pesticide in surface water based on scalable upcycling of rice straw to luminescent CQDs via energy-efficient alkali treatment |
| title_short | Double-reverse-signal ratiometric fluorescence probe for residual determination of chlorpyrifos pesticide in surface water based on scalable upcycling of rice straw to luminescent CQDs via energy-efficient alkali treatment |
| title_sort | double reverse signal ratiometric fluorescence probe for residual determination of chlorpyrifos pesticide in surface water based on scalable upcycling of rice straw to luminescent cqds via energy efficient alkali treatment |
| topic | Rice straw Carbon dots Room temperature synthesis Ratiometric fluorescence probe Chlorpyrifos |
| url | http://www.sciencedirect.com/science/article/pii/S266683192500030X |
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