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Journal of Solid State Electrochemistry

, Volume 23, Issue 4, pp 1211–1220 | Cite as

A molecularly imprinted electrochemical sensor based on Au nanocross-chitosan composites for detection of paraquat

  • Xueqing Shan
  • Jean de Dieu Habimana
  • Jian Ji
  • Jiadi Sun
  • Fuwei Pi
  • Yinzhi Zhang
  • Xiulan SunEmail author
Original Paper
  • 70 Downloads

Abstract

A novel electrochemical sensor for paraquat (PQ) detection based on molecularly imprinted polymer (MIP) membranes on a glassy carbon electrode (GCE) modified with Au nanocrosses-chitosan (AuNCs-CS) was constructed. P-Aminothiophenol (p-ATP) and 4,4′-bipyridine template were assembled on the surface of the modified GCE by the formation of Au–S bonds and hydrogen-bonding interactions, followed by polymer membrane formation by the electropolymerization in a polymer solution containing p-ATP, HAuCl4, tetrabutylammonium perchlorate (TBAP), and the template molecule 4,4′-bipyridine. The as-constructed molecularly imprinted sensor (MIP-AuNC-CS) was characterized by differential pulse voltammetry (DPV), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). This is the first time that molecularly imprinted polymer technology has been integrated with a modified AuNCs-CS to electrochemically detect PQ. The linear response of the MIP-AuNC-CS sensor was in the range from 1 × 10−14 to 1 × 10−10 mol L−1, and the limit of detection was 2.3 × 10−15 mol L−1. This sensor showed high-speed real-time detection capability, low sample consumption, high sensitivity, low interference, and good stability characteristics, and was proven to detect PQ.

Keywords

Paraquat Au nanocrosses Chitosan Molecularly imprinted polymer Electrochemical sensor Differential pulse voltammetry 

Notes

Funding information

This work has been supported by the National Research Program of China (CX173007) and the National First-class Discipline Program of Food Science and Technology (No. JUFSTR20180303).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10008_2018_4192_MOESM1_ESM.docx (786 kb)
ESM 1 (DOCX 786 kb)

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Xueqing Shan
    • 1
  • Jean de Dieu Habimana
    • 1
  • Jian Ji
    • 1
  • Jiadi Sun
    • 1
  • Fuwei Pi
    • 1
  • Yinzhi Zhang
    • 1
  • Xiulan Sun
    • 1
    Email author
  1. 1.State Key Laboratory of Food Science and Technology, School of Food Science and Technology, National Engineering Research Center for Functional Food, Synergetic Innovation Center of Food Safety and NutritionJiangnan UniversityWuxiChina

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