Carbon Quantum Dots from Pomelo Peel as Fluorescence Probes for “Turn-Off–On” High-Sensitivity Detection of Fe3+ and L-Cysteine
Abstract
:1. Introduction
2. Results and Discussion
2.1. Optimization of the Preparation Conditions of CQDs
2.2. Characterization
2.3. Optical Properties of CQDs
2.4. Selectivity and Sensitivity
2.5. Optosensing of Fe3+ and L-Cys
2.6. Possible Mechanism of “Turn-Off–On” Mode
2.7. Visualization Cellulose/CQDs Composite Hydrogels and Test Paper
3. Materials and Methods
3.1. Materials
3.2. Instruments
3.3. Synthesis of CQDs
3.4. QY of CQDs
3.5. Fluorescence Stability of CQDs
3.6. Selectivity and Interference Measurements of CQDs
3.7. Sensitive Detection of Fe3+ and L-Cys
3.8. Fe3+ and L-Cys Detection in Real Samples
3.9. Preparation of Cellulose/CQDs Composite Hydrogels
3.10. Preparation of CQD-based Test Papers
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
Sample Availability
References
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Zhang, D.; Zhang, F.; Liao, Y.; Wang, F.; Liu, H. Carbon Quantum Dots from Pomelo Peel as Fluorescence Probes for “Turn-Off–On” High-Sensitivity Detection of Fe3+ and L-Cysteine. Molecules 2022, 27, 4099. https://doi.org/10.3390/molecules27134099
Zhang D, Zhang F, Liao Y, Wang F, Liu H. Carbon Quantum Dots from Pomelo Peel as Fluorescence Probes for “Turn-Off–On” High-Sensitivity Detection of Fe3+ and L-Cysteine. Molecules. 2022; 27(13):4099. https://doi.org/10.3390/molecules27134099
Chicago/Turabian StyleZhang, Dianwei, Furui Zhang, Yonghong Liao, Fenghuan Wang, and Huilin Liu. 2022. "Carbon Quantum Dots from Pomelo Peel as Fluorescence Probes for “Turn-Off–On” High-Sensitivity Detection of Fe3+ and L-Cysteine" Molecules 27, no. 13: 4099. https://doi.org/10.3390/molecules27134099