Facile Synthesis of Nitrogen-Doped Carbon Quantum Dots with Chitosan for Fluorescent Detection of Fe3+
1
School of Chemistry and Chemical Engineering, Qingdao University, Qingdao 266071, China
2
State Key Laboratory of Bio-fibers and Eco-textiles, Shandong Collaborative Innovation Center of Marine Biobased Fibers and Ecological Textiles, Institute of Marine Biobased Materials, Qingdao University, Qingdao 266071, China
*
Author to whom correspondence should be addressed.
Polymers 2019, 11(11), 1731; https://doi.org/10.3390/polym11111731
Received: 7 September 2019
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Revised: 17 October 2019
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Accepted: 19 October 2019
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Published: 23 October 2019
A facile, economical, and one-step hydrothermal method was used to prepare highly luminescent nitrogen-doped carbon quantum dots (N-CQDs) with chitosan as both carbon and nitrogen sources. The as-prepared N-CQDs have an average size of 2 nm and exhibit excitation wavelength-dependent fluorescence with a maximum excitation and emission at 330 and 410 nm, respectively. Furthermore, due to the effective quenching effect of Fe3+ ions, the prepared N-CQDs can be used as a fluorescent sensor for Fe3+ ion-sensitive detection with a detection limit of 0.15 μM. The selectivity experiments revealed that the fluorescent sensor is specific to Fe3+ even with interference by high concentrations of other metal ions. Most importantly, the N-CQD-based Fe3+ ion sensor can be successfully applied to the determination of Fe3+ in real water samples. With excellent sensitivity and selectivity, such stable and cheap carbon materials are potentially suitable for the monitoring of Fe3+ in environmental application.
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Keywords:
chitosan; N-CQDs; Fe3+ detection; fluorescent sensor
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MDPI and ACS Style
Zhao, L.; Wang, Y.; Zhao, X.; Deng, Y.; Xia, Y. Facile Synthesis of Nitrogen-Doped Carbon Quantum Dots with Chitosan for Fluorescent Detection of Fe3+. Polymers 2019, 11, 1731. https://doi.org/10.3390/polym11111731
AMA Style
Zhao L, Wang Y, Zhao X, Deng Y, Xia Y. Facile Synthesis of Nitrogen-Doped Carbon Quantum Dots with Chitosan for Fluorescent Detection of Fe3+. Polymers. 2019; 11(11):1731. https://doi.org/10.3390/polym11111731
Chicago/Turabian StyleZhao, Li, Yesheng Wang, Xihui Zhao, Yujia Deng, and Yanzhi Xia. 2019. "Facile Synthesis of Nitrogen-Doped Carbon Quantum Dots with Chitosan for Fluorescent Detection of Fe3+" Polymers 11, no. 11: 1731. https://doi.org/10.3390/polym11111731
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