One-dimensional rare-earth tungstate nanostructure encapsulated reduced graphene oxide electrocatalyst-based electrochemical sensor for the detection of organophosphorus pesticide

The use of agricultural pesticides in modern agriculture has permitted enormous and reliable production. The organophosphorus pesticide fenitrothion (FT) is widely used in agricultural regions and has been related to detrimental effects on human health. We constructed an electrochemical sensor that detects fenitrothion (FT) using one-dimensional (1D) Pr₂(WO₄)₃ nanorods (PWO) incorporated reduced graphene oxide (RGO) electrocatalyst that was synthesized hydrothermally. The PWO nanorods are finely embedded on the RGO nanosheet, according to powder XRD, FESEM, EDS, HRTEM, XPS, and micro-Raman studies. The PWO/RGO electrochemical behavior towards FT was studied by the different electrochemical characterization approaches [CV, DPV, AMP(i–t)]. Our proposed PWO/RGO sensor exhibited a linear range of 0.01–313 µM and an LOD of 0.0054 µM in AMP(i–t). The estimation of FT in different water samples proves the usefulness of the PWO/RGO sensor. Graphical abstract: (Figure presented.).