Abstract
In this work, a carbon black (VXC-72R)/zirconia (ZrO2) nanocomposite-modified glassy carbon electrode (GCE) was designed, and a VXC-72R/ZrO2/GCE-based electrochemical sensor was successfully fabricated for the high-sensitivity detection of methyl parathion (MP). Electrochemical measurements showed that the VXC-72R/ZrO2/GCE-based electrochemical sensor could make full use of the respective advantages of the VXC-72R and ZrO2 nanoparticles to enhance the MP determination performance. The VXC-72R nanoparticles had high electrical conductivity and a large surface area, and the ZrO2 nanoparticles possessed a strong affinity to phosphorus groups, which could achieve good organophosphorus adsorption. On the basis of the synergistic effect generated from the interaction between the VXC-72R and ZrO2 nanoparticles, the VXC-72R/ZrO2/GCE-based electrochemical sensor could show excellent trace analysis determination performance. The low detection limit could reach up to 0.053 μM, and there was a linear concentration range of 1 μM to 100 μM. Such a high performance indicates that the VXC-72R/ZrO2/GCE-based electrochemical sensor has potential in numerous foreground applications.
Highlights
As a classic pesticide, methyl parathion (MP) has made important contributions to the field of crop protection and pest control [1]
The VXC-72R/ZrO2 /glassy carbon electrode (GCE)-based electrochemical sensor was successfully fabricated through drop-coating technology
VXC-72R/ZrO2 nanocomposite, the XRD pattern showed some well-defined diffraction peaks that were in complete agreement with the standard diffraction peak of VXC-72R and ZrO2
Summary
Methyl parathion (MP) has made important contributions to the field of crop protection and pest control [1]. Research and development for a convenient and efficient detecting method for MP at trace levels have attracted more and more research interests from scientific researchers. MP, their complex working procedures and high compliance costs make it difficult to meet the demand for fast speeds and high, efficient detection [5,6,7]. It is of great significance to design a simple, low-cost, and sensitive analytical technique for the detection of MP. Electrochemical sensors have been shown to enhance detection efficiency and reduce operation costs, which accelerates the development of high-performance pesticide detection technology [8,9,10,11,12,13]. It should be noted that the preparation of high-performance electrochemical sensors is largely dependent on chemically modified electrodes. Among the many modification materials, carbon materials
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