Detection of Ascorbic Acid Using Green Synthesized Carbon Quantum Dots

In this work, carbon quantum dots (CQDs) were synthesized by microwave irradiation and were electropolymerized on glassy carbon electrode (GCE) to establish an electrochemical sensor for the selective detection of ascorbic acid (AA). Electrochemical behaviors of the prepared sensor were investigated...

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Bibliographic Details
Published in:Journal of sensors 2019, Vol.2019 (2019), p.1-10
Main Authors: Guo, Yi, Xu, Zhifang, Liu, Yangyang, Wang, Hong, Fang, Yuxin, Zhang, Di, Wei, Yuyun, Wang, Shenjun
Format: Article
Language:English
Subjects:
Ascorbic acid
Carbon
Cell division
Chemical sensors
Complex systems
Dopamine
Electrochemical impedance spectroscopy
Electrodes
Glassy carbon
Glucose
Methods
Microscopy
Polyethylene glycol
Quantum dots
Selectivity
Sensors
Synthesis
Uric acid
Voltammetry
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Summary:In this work, carbon quantum dots (CQDs) were synthesized by microwave irradiation and were electropolymerized on glassy carbon electrode (GCE) to establish an electrochemical sensor for the selective detection of ascorbic acid (AA). Electrochemical behaviors of the prepared sensor were investigated by cyclic voltammetry (CV), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS). Herein, two wide linear responses were obtained in ranges of 0.01-3 mM and 4-12 mM with a low detection limit of 10 μM to AA. High sensitivities (44.13 μA-1 μM-1 cm-2, 9.66 μA-1 μM-1 cm-2, respectively) corresponding to the linear ranges were also achieved. In addition, the electrochemical sensor exhibited good selectivity and robust anti-interference ability toward AA in the presence of dopamine (DA) and uric acid (UA). These results showed that this sensor can be used as a promising tool to detect AA in real complex systems.
ISSN:1687-725X
1687-7268
DOI:10.1155/2019/9869682