In this work, utilizes a simple hydrothermal process for preparing ErVO4 nanoparticles. The prepared ErVO4 nanoparticles were used for the electrochemical detection of hazardous organic contaminants in 4-nitrotoluene. The physicochemical properties of ErVO4 nanoparticles were examined using various characterization techniques, including X-ray diffraction, field emission scanning electron microscopy, and high-resolution transmission electron microscopy. Using differential pulse voltammetry (DPV) and cyclic voltammetry (CV), the electrochemical detection of 4-nitrotoluene was assessed. In the 0.01-375 μM detection ranges, the ErVO4 modified screen-printed carbon electrode (SPCE) sensor showed a linear response and a low detection limit of 9 nM. The constructed ErVO4/SPCE sensor exhibits selective detection in the presence of other chemical species, reproducibility, reusability, and real sample validation with a recovery range of (±95.00–99.00%). Compared to several previously reported sensors, the ErVO4 gave a substantially lower LOD for 4-nitrotoluene detection and was easier and faster to fabricate. The proposed ErVO4-modified electrochemical sensor for 4-nitrotoluene described is affordable and flexible, enabling point-of-care 4-nitrotoluene testing essential for successful environmental monitoring and water quality accreditation.

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