A novel paraoxon imprinted electrochemical sensor based on MoS 2 NPs@MWCNTs and its application to tap water samples

• Published in: Food and chemical toxicology Vol. 163; p. 112994
• Main Authors: Bölükbaşı, Ömer Saltuk, Yola, Bahar Bankoğlu, Boyacıoğlu, Havva, Yola, Mehmet Lütfi
• Format: Journal Article
• Language: English
• Published: England 01.05.2022
• Subjects: Acetylcholinesterase; Electrochemical Techniques - methods; Humans; Molecular Imprinting; Nanotubes, Carbon - chemistry; Organophosphorus Compounds; Paraoxon; Pesticides; Water; Molecularly imprinting; Paraoxon; Voltammetry; Food safety; Nanocomposite

Organophosphorus pesticides are widely utilized in agricultural fertility. However, their long-term accumulations result in serious damage to human health and ecological balance. Paraoxon (PAR) can block acetylcholinesterase in the human body, resulting in death. Thus, in this study, a molecularly imprinted electrochemical PAR sensor based on multiwalled carbon nanotubes (MWCNTs)/molybdenum disulfide nanoparticles (MoS NPs) nanocomposite (MoS NPs@MWCNTs) was proposed for selective tap water determination. A hydrothermal fabrication approach was firstly implemented to prepare MoS NPs@MWCNTs nanocomposite. Afterwards, the formation of PAR imprinted electrochemical electrode was performed on nanocomposite modified glassy carbon electrode (GCE) in presence of PAR as template and pyrrole (Py) as a monomer by cyclic voltammetry (CV) technique. Just after determining the physicochemical features of as-fabricated nanostructures by scanning electron microscopy (SEM), transmission electron microscopy (TEM), x-ray diffraction (XRD), Raman spectroscopy, and atomic force microscopy (AFM), the electrochemical behavior of the fabricated sensors was determined through CV, differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS). The suggested imprinted electrode provided the acceptable limit of quantification (LOQ) and limit of detection (LOD) values of 1.0 × 10  M, and 2.0 × 10  M, respectively. As a consequence, the proposed PAR imprinted electrochemical sensor can be offered for the determining safe tap water and its utility.