Journal of Solid State Electrochemistry

, Volume 18, Issue 9, pp 2487–2496 | Cite as

Electrochemical sensor for determination of aflatoxin B1 based on multiwalled carbon nanotubes-supported Au/Pt bimetallic nanoparticles

  • Zhihua WangEmail author
  • Jinshu Li
  • Lijuan Xu
  • Yanjun Feng
  • Xiaoquan Lu
Original Paper


A sensitive and selective imprinted electrochemical sensor for the determination of aflatoxin B1 (AFB1) was constructed on a glassy carbon electrode by stepwise modification of functional multiwalled carbon nanotubes (MCNTs), Au/Pt bimetallic nanoparticles (Au/PtNPs), and a thin imprinted film. The fabrication of a homogeneous porous poly o-phenylenediamine (POPD)-grafted Au/Pt bimetallic multiwalled carbon nanotubes nanocomposite film was conducted by controllable electrodepositing technology. The sensitivity of the sensor was improved greatly because of the nanocomposite functional layer; the proposed sensor exhibited excellent selectivity toward AFB1 owing to the porous molecular imprinted polymer (MIP) film. The surface morphologies of the modified electrodes were characterized using a scanning electron microscope. The performance of the imprinted sensor was investigated by cyclic voltammetry, differential pulse voltammetry, and electrochemical impedance spectroscopy in detail. A linear relationship between the sensor response signal and the logarithm of AFB1 concentrations ranging from 1 × 10−10 to 1 × 10−5 mol L−1 was obtained with a detection limit of 0.03 nmol L−1. It was applied to detect AFB1 in hogwash oil successfully.


Molecular imprinting Carbon nanotubes Au/Pt bimetallic nanoparticles Aflatoxin B1 



This work is supported by the National Natural Science Foundation of China (No. 20965007). We also thank Key Laboratory of Eco-Environment-Related Polymer Materials (Northwest Normal University), Ministry of Education, for the financial support.


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Copyright information

© Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Zhihua Wang
    • 1
    Email author
  • Jinshu Li
    • 1
  • Lijuan Xu
    • 1
  • Yanjun Feng
    • 1
  • Xiaoquan Lu
    • 1
  1. 1.Key Laboratory of Bioelectrochemistry and Environmental Analysis of Gansu Province, College of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhouPeople’s Republic of China

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