A highly sensitive disposable electrochemical sensor based on copper nanoparticles for pesticide imidacloprid determination in contaminated water sources

Fernandes J.O.; Bernardino C.A.R.; Marques M.C.D.C.; de Souza O.P.L.; Mahler C.F.; Braz B.F.; Santelli R.E.; Canevari T.D.C.; Cincotto F.H.

A highly sensitive disposable electrochemical sensor based on copper nanoparticles for pesticide imidacloprid determination in contaminated water sources

Tipo

Artigo

Data de publicação

2025

Periódico

Environmental Science: Water Research and Technology

Citações (Scopus)

0

Autores

Fernandes J.O.
Bernardino C.A.R.
Marques M.C.D.C.
de Souza O.P.L.
Mahler C.F.
Braz B.F.
Santelli R.E.
Canevari T.D.C.
Cincotto F.H.

Resumo

© 2025 The Royal Society of Chemistry.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.

Assuntos Scopus

Contaminated water , Copper nanoparticles , Disposables , Electrochemical performance , Electrochemicals , Environmental sample , Imidacloprids , Screen-printed carbon electrodes , Structural characterization , Water source