Nature-derived carbon dots for ratiometric analysis: Bismuth-doped fluorescent probe for oyster shell determination in tablet dosage forms
Wheat bran (WB), a major byproduct of the milling industry, is the most prevalent among various cereal bran residues. The substantial accumulation of WB biomass is driving the research community to seek innovative and economically viable applications for this bioresource. In this context, the potent...
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| Language: | English |
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Elsevier
2025-12-01
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666831925000943 |
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| author | Mahmoud Hamed Noha Ibrahim Alaa Bedair Fotouh R. Mansour Samy Emara Walaa Zarad |
| author_facet | Mahmoud Hamed Noha Ibrahim Alaa Bedair Fotouh R. Mansour Samy Emara Walaa Zarad |
| author_sort | Mahmoud Hamed |
| collection | DOAJ |
| description | Wheat bran (WB), a major byproduct of the milling industry, is the most prevalent among various cereal bran residues. The substantial accumulation of WB biomass is driving the research community to seek innovative and economically viable applications for this bioresource. In this context, the potential for utilizing WB byproducts as nature-derived carbon quantum dots (n-CQDs) precursor has been highlighted. This research introduces an innovative, environmentally friendly, and effective WB-based n-CQDs (WB-n-CQDs) synthesized by microwave-assisted method. The developed WB-n-CQDs-based fluorescence probe, in combination with silver nitrate, demonstrates high sensitivity and selectivity for oyster shell calcium (OSC) quantification. The incorporation of bismuth oxide and folic acid as dopants effectively enhances the intensity of two emission peaks at 354 nm and 445 nm, thereby improving fluorescence ratiometric capabilities for measuring OSC. A variety of experimental techniques has been employed to investigate the structural, morphological, and optical characteristics of WB-n-CQDs, including Fourier-transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, fluorescence spectroscopy, UV–Vis spectroscopy, and high-resolution transmission electron microscopy. The experimental results demonstrated remarkable physical and chemical characteristics, highlighting the potential of WB-n-CQDs for their applications in green analytical chemistry. The fluorescence intensity of Ag-WB-n-CQDs demonstrated an acceptable linear correlation with OSC concentration levels ranging from 0.1 to 1.0 μg/mL, along with high recovery percentages that lie between 98 % and 102 %. The successful application of Ag-WB-n-CQDs for measuring OSC in its dosage forms demonstrates the promising potential of biomass-derived n-CQDs in sustainable and advanced sensing technologies. |
| format | Article |
| id | doaj-art-97d1ff35b2a14a00a1eae3cef90ddd9f |
| institution | OA Journals |
| issn | 2666-8319 |
| language | English |
| publishDate | 2025-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Talanta Open |
| spelling | doaj-art-97d1ff35b2a14a00a1eae3cef90ddd9f2025-08-20T02:02:19ZengElsevierTalanta Open2666-83192025-12-011210049210.1016/j.talo.2025.100492Nature-derived carbon dots for ratiometric analysis: Bismuth-doped fluorescent probe for oyster shell determination in tablet dosage formsMahmoud Hamed0Noha Ibrahim1Alaa Bedair2Fotouh R. Mansour3Samy Emara4Walaa Zarad5Pharmaceutical Chemistry Department, Faculty of Pharmacy, Misr International University, Km 28 Ismailia Road, Cairo 44971, Egypt; MIU Chemistry Society (MIU-CS), Faculty of Pharmacy, Misr International University, Km 28 Ismailia Road, Cairo 44971, EgyptPharmaceutical Chemistry Department, Faculty of Pharmacy, Misr International University, Km 28 Ismailia Road, Cairo 44971, Egypt; MIU Chemistry Society (MIU-CS), Faculty of Pharmacy, Misr International University, Km 28 Ismailia Road, Cairo 44971, EgyptDepartment of Analytical Chemistry, Faculty of Pharmacy, University of Sadat City, Sadat City 32958, EgyptPharmaceutical Analytical Chemistry Department, Faculty of Pharmacy, Tanta University, Tanta 31111, Egypt; Medicinal Chemistry Department, Faculty of Pharmacy, King Salman International University (KSIU), South Sinai, Egypt; Correponding author at: Elgeish Street, the medical campus of Tanta University, Tanta 31111, Egypt.Pharmaceutical Chemistry Department, Faculty of Pharmacy, Misr International University, Km 28 Ismailia Road, Cairo 44971, Egypt; MIU Chemistry Society (MIU-CS), Faculty of Pharmacy, Misr International University, Km 28 Ismailia Road, Cairo 44971, EgyptPharmaceutical Chemistry Department, Faculty of Pharmacy, Misr International University, Km 28 Ismailia Road, Cairo 44971, Egypt; MIU Chemistry Society (MIU-CS), Faculty of Pharmacy, Misr International University, Km 28 Ismailia Road, Cairo 44971, EgyptWheat bran (WB), a major byproduct of the milling industry, is the most prevalent among various cereal bran residues. The substantial accumulation of WB biomass is driving the research community to seek innovative and economically viable applications for this bioresource. In this context, the potential for utilizing WB byproducts as nature-derived carbon quantum dots (n-CQDs) precursor has been highlighted. This research introduces an innovative, environmentally friendly, and effective WB-based n-CQDs (WB-n-CQDs) synthesized by microwave-assisted method. The developed WB-n-CQDs-based fluorescence probe, in combination with silver nitrate, demonstrates high sensitivity and selectivity for oyster shell calcium (OSC) quantification. The incorporation of bismuth oxide and folic acid as dopants effectively enhances the intensity of two emission peaks at 354 nm and 445 nm, thereby improving fluorescence ratiometric capabilities for measuring OSC. A variety of experimental techniques has been employed to investigate the structural, morphological, and optical characteristics of WB-n-CQDs, including Fourier-transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, fluorescence spectroscopy, UV–Vis spectroscopy, and high-resolution transmission electron microscopy. The experimental results demonstrated remarkable physical and chemical characteristics, highlighting the potential of WB-n-CQDs for their applications in green analytical chemistry. The fluorescence intensity of Ag-WB-n-CQDs demonstrated an acceptable linear correlation with OSC concentration levels ranging from 0.1 to 1.0 μg/mL, along with high recovery percentages that lie between 98 % and 102 %. The successful application of Ag-WB-n-CQDs for measuring OSC in its dosage forms demonstrates the promising potential of biomass-derived n-CQDs in sustainable and advanced sensing technologies.http://www.sciencedirect.com/science/article/pii/S2666831925000943Carvon dotsRatiometricOyster shellDosage formGreen analytical chemistry |
| spellingShingle | Mahmoud Hamed Noha Ibrahim Alaa Bedair Fotouh R. Mansour Samy Emara Walaa Zarad Nature-derived carbon dots for ratiometric analysis: Bismuth-doped fluorescent probe for oyster shell determination in tablet dosage forms Talanta Open Carvon dots Ratiometric Oyster shell Dosage form Green analytical chemistry |
| title | Nature-derived carbon dots for ratiometric analysis: Bismuth-doped fluorescent probe for oyster shell determination in tablet dosage forms |
| title_full | Nature-derived carbon dots for ratiometric analysis: Bismuth-doped fluorescent probe for oyster shell determination in tablet dosage forms |
| title_fullStr | Nature-derived carbon dots for ratiometric analysis: Bismuth-doped fluorescent probe for oyster shell determination in tablet dosage forms |
| title_full_unstemmed | Nature-derived carbon dots for ratiometric analysis: Bismuth-doped fluorescent probe for oyster shell determination in tablet dosage forms |
| title_short | Nature-derived carbon dots for ratiometric analysis: Bismuth-doped fluorescent probe for oyster shell determination in tablet dosage forms |
| title_sort | nature derived carbon dots for ratiometric analysis bismuth doped fluorescent probe for oyster shell determination in tablet dosage forms |
| topic | Carvon dots Ratiometric Oyster shell Dosage form Green analytical chemistry |
| url | http://www.sciencedirect.com/science/article/pii/S2666831925000943 |
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