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外文期刊>International Journal of Electrochemical Science
>Simultaneous Determination of Three Nitroaniline Isomers by β-cyclodextrins (β-CDs) and Graphene Quantum Dots (GQDs) Composite Modified Glassy Carbon Electrodes
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Simultaneous Determination of Three Nitroaniline Isomers by β-cyclodextrins (β-CDs) and Graphene Quantum Dots (GQDs) Composite Modified Glassy Carbon Electrodes
Nitroaniline isomers as toxic and environmental pollutant, their detection and recognition is an importanttask. A novel electrochemical sensor based on β-cyclodextrins (β-CDs) and graphene quantum dots(GQDs) composite modified glassy carbon electrodes (β-CDs-GQDs/GCE) has been fabricated fordetection and discrimination of three nitroaniline isomers simultaneously. The β-CDs-GQDs/GCEelectrode were characterized by different electrochemical techniques. The three isomers exhibitedobvious peak current and potential differences on the modified electrode by cyclic voltammetry (CV)and differential pulse voltammetry (DPV). Because of the selective formation of H-bonds between βCDs-GQDs composites and three nitroaniline isomers, the electrochemical recognitions were achieved.Especially, this recognition method relies on not only the peak currents but also the different oxidationpotentials. Furthermore, the satisfactory results were obtained for the three noxious nitroaniline isomerssimultaneous detection in two pesticides practical samples, when this electrode was applied. Theinvestigates results show that β-CDs and GQDs are suitable material for isomers sensor. Moreover,.
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