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Electrochemical sensor for sensitive detection of luteolin based on multi-walled carbon nanotubes/poly(3,4-ethylenedioxythiophene)–gold nanocomposites

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Abstract

In this work, an electrochemical sensor was fabricated for the sensitive detection of luteolin. It is based on the use of nanomaterials composed of multi-walled carbon nanotubes, poly-3,4-ethylenedioxythiophene, and gold nanoparticles (MWCNTs/PEDT–Au). A facile and effective one-pot method was employed to synthesize the MWCNTs/PEDT–Au nanocomposites. The microstructure and composition of the as-synthesized nanocomposites were confirmed by SEM, TEM, and ICP-OES characterizations. The electrochemical performance of luteolin at MWCNTs/PEDT–Au/GCE was investigated by EIS, CV, and SWV. The results indicated that MWCNTs/PEDT–Au nanocomposites exhibited excellent catalytic activity towards the electrochemical redox process of luteolin. At the optimal experimental conditions, the MWCNTs/PEDT–Au/GCE presented a high sensitivity of 0.00022 μmol dm−3 (S/N = 3, n = 3) and a linear range of 0.1–15 μmol dm−3 and 0.001–0.1 μmol dm−3 towards luteolin with good selectivity and stability.

Graphical abstract: Electrochemical sensor for sensitive detection of luteolin based on multi-walled carbon nanotubes/poly(3,4-ethylenedioxythiophene)–gold nanocomposites

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Article information


Submitted
18 Oct 2019
Accepted
16 Dec 2019
First published
04 Jan 2020

New J. Chem., 2020, Advance Article
Article type
Paper

Electrochemical sensor for sensitive detection of luteolin based on multi-walled carbon nanotubes/poly(3,4-ethylenedioxythiophene)–gold nanocomposites

W. Cheng, P. Zeng, C. Ma, H. Peng, J. Yang, J. Huang, M. Zhang and F. Cheng, New J. Chem., 2020, Advance Article , DOI: 10.1039/C9NJ05241K

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