LIN Xuan-yu, ZHANG Hong, HUANG Shuo, CHANG Jing, GAO Xin, YAO Long-hui, YUE Hong-yan. Electrochemical determination of levodopa using ZnO nanowire arrays/graphene foam[J]. Chinese Journal of Engineering, 2016, 38(9): 1306-1311. DOI: 10.13374/j.issn2095-9389.2016.09.016
Citation: LIN Xuan-yu, ZHANG Hong, HUANG Shuo, CHANG Jing, GAO Xin, YAO Long-hui, YUE Hong-yan. Electrochemical determination of levodopa using ZnO nanowire arrays/graphene foam[J]. Chinese Journal of Engineering, 2016, 38(9): 1306-1311. DOI: 10.13374/j.issn2095-9389.2016.09.016

Electrochemical determination of levodopa using ZnO nanowire arrays/graphene foam

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  • Received Date: November 19, 2015
  • Available Online: July 21, 2021
  • A three-dimensional (3D), macroporous and highly conductive grapheme foam (GF) was synthesized by chemical vapor deposition using a nickel foam as a template. ZnO nanowire arrays were vertically grown on the surface of the prepared GF using hydrothermal synthesis. The morphologies and structure of the ZnO NWAs/GF were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and Raman spectroscopy. The results show that the prepared GF is high-quality and defect free, and the ZnO NWAs with uniform size vertically grows on the surface of 3D GF. The ZnO NWAs/GF was used as an elec-trochemical electrode for determining levodopa (LD). The results of electrochemical tests show that the oxidation current of LD is well linear with its concentration in the range of 0-80μmol·L-1 with a sensitivity of 0.41μA·(μmol·L-1)-1, and the ZnO NWAs/GF electrode also shows good reproducibility and stability. The ZnO NWAs/GF can detect LD with high selectivity in the presence of uric acid.
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