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Article

Electrochemical and Fluorescent Properties of Crown Ether Functionalized Graphene Quantum Dots for Potassium and Sodium Ions Detection

1
Department of Engineering, University of Messina, Contrada Di Dio, I-98166 Messina, Italy
2
Department of Mathematical and Computer Sciences, Physical Sciences and Earth Sciences, University of Messina, I-98166 Messina, Italy
*
Authors to whom correspondence should be addressed.
Academic Editor: Antonios Kelarakis
Nanomaterials 2021, 11(11), 2897; https://0-doi-org.brum.beds.ac.uk/10.3390/nano11112897
Received: 9 October 2021 / Revised: 23 October 2021 / Accepted: 27 October 2021 / Published: 29 October 2021
(This article belongs to the Special Issue Electrochemical Properties and Applications of Nanomaterials)
The concentration of sodium and potassium ions in biological fluids, such as blood, urine and sweat, is indicative of several basic body function conditions. Therefore, the development of simple methods able to detect these alkaline ions is of outmost importance. In this study, we explored the electrochemical and optical properties of graphene quantum dots (GQDs) combined with the selective chelating ability of the crown ethers 15-crown-5 and 18-crown-6, with the final aim to propose novel composites for the effective detection of these ions. The results obtained comparing the performances of the single GQDs and crown ethers with those of the GQDs-15-crown-5 and GQDs-18-crown-6 composites, have demonstrated the superior properties of these latter. Electrochemical investigation showed that the GQDs based composites can be exploited for the potentiometric detection of Na+ and K+ ions, but selectivity still remains a concern. The nanocomposites showed the characteristic fluorescence emissions of GQDs and crown ethers. The GQDs-18-crown-6 composite exhibited ratiometric fluorescence emission behavior with the variation of K+ concentration, demonstrating its promising properties for the development of a selective fluorescent method for potassium determination. View Full-Text
Keywords: graphene quantum dots; K+ detection; Na+ detection; fluorescent sensors; electrochemical sensors graphene quantum dots; K+ detection; Na+ detection; fluorescent sensors; electrochemical sensors
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MDPI and ACS Style

Iannazzo, D.; Espro, C.; Ferlazzo, A.; Celesti, C.; Branca, C.; Neri, G. Electrochemical and Fluorescent Properties of Crown Ether Functionalized Graphene Quantum Dots for Potassium and Sodium Ions Detection. Nanomaterials 2021, 11, 2897. https://0-doi-org.brum.beds.ac.uk/10.3390/nano11112897

AMA Style

Iannazzo D, Espro C, Ferlazzo A, Celesti C, Branca C, Neri G. Electrochemical and Fluorescent Properties of Crown Ether Functionalized Graphene Quantum Dots for Potassium and Sodium Ions Detection. Nanomaterials. 2021; 11(11):2897. https://0-doi-org.brum.beds.ac.uk/10.3390/nano11112897

Chicago/Turabian Style

Iannazzo, Daniela, Claudia Espro, Angelo Ferlazzo, Consuelo Celesti, Caterina Branca, and Giovanni Neri. 2021. "Electrochemical and Fluorescent Properties of Crown Ether Functionalized Graphene Quantum Dots for Potassium and Sodium Ions Detection" Nanomaterials 11, no. 11: 2897. https://0-doi-org.brum.beds.ac.uk/10.3390/nano11112897

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