期刊
IONICS
卷 22, 期 7, 页码 1241-1252出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-016-1646-9
关键词
Potentiometric electrodes; Graphene nanosheets; Molecular wire; CdO nanowires; Copper
资金
- Researches and Technology Council, Baqiyatallah University of Medical Sciences, Tehran, Iran
- Elite Club at the Islamic Azad University, Iran
In the present study, a novel nano-layer sensing materials for the fabrication of a newly modified potentiometric carbon paste electrode was introduced. Its sensing layer was prepared with the incorporation of 1-(3-imino-4-hydroxophenyl-azo-4 nitrobenzene) isonicotinohydrazide as an efficient ionophore into the matrix consisting of graphite powder, synthesized graphene nanosheets, synthesized CdO nanowires, and diphenylacetylene (a typical molecular wire as the conductive binder). The suggested nanocomposite carbon paste electrode gave a Nernstian behavior in the linear range of 3.50 x 10(-9) to 1.00 x 10(-2) M with the detection limit of 1.44 x 10(-9) M. For investigation of the electrochemical behavior of Cu2+ at the surface of the unmodified and modified electrodes, the differential pulse voltametric method was used. The proposed sensor was successfully applied in the determination of copper ions in some foodstuff real samples with satisfactory results.
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