Julia Oliveira Fernandes, Cassiano Augusto Rolim Bernardino, Maria Carolina da Costa Marques, Octavio Pereira Lopes de Souza, Claudio Fernando Mahler, Bernardo Ferreira Braz, Ricardo Erthal Santelli, Thiago da Cruz Canevari and Fernando Henrique Cincotto
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A highly sensitive disposable electrochemical sensor based on copper nanoparticles for pesticide imidacloprid determination in contaminated water sources†
The study aimed to develop a new electrochemical sensor based on a screen-printed carbon electrode modified with copper nanoparticles (SPE/CuNPs) to determine imidacloprid (IMI) pesticide in environmental samples. The sensor's structural characterization and electrochemical performance were assessed through high-resolution transmission electron microscopy and ultraviolet–visible spectroscopy, electrochemical impedance spectroscopy, cyclic voltammetry, and differential pulse voltammetry. The results indicated that the SPE/CuNPs exhibited a porous and rough surface morphology, which enhances the adsorption of chemical species at the electrode/solution interface. Furthermore, the incorporation of copper nanoparticles significantly improved the sensor's sensitivity. The sensor displayed high sensitivity and selectivity for detecting IMI, with a detection limit of 10.8 nmol L−1 and a linear response range of 0.059 to 0.516 μmol L−1, highlighting its robust analytical performance in environmental sample analysis.
期刊介绍：
Environmental Science: Water Research & Technology seeks to showcase high quality research about fundamental science, innovative technologies, and management practices that promote sustainable water.
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