Abstract
This work describes the synthesis, characterization, and electrochemical application of innovative AgNP/carbon dot/MWCNT nanoarchitecture. Silver nanoparticles (AgNPs) have been obtained by directly reducing silver nitrate salt in carbon dot/MWCNT alcoholic solution. UV–vis spectroscopy, HR-TEM, XPS, and electrochemical techniques have characterized this nanoarchitecture. The AgNP/carbon dot/MWCNT nanoarchitecture has been dispersed on a gold-printed electrode surface, showing excellent electrocatalytic activity for fenitrothion determination in acetate buffer, pH 4.5, by impedance electrochemistry spectroscopy with a detection limit of 0.48 nmol L−1. The fenitrothion pesticide detection was also performed in orange juice and did not suffer significant interference from other pesticides.
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Funding
JHA acknowledges CNPq, and TCC acknowledges Mackpesquisa, FINEP (039/2021), and CNPq (process 302575/2023–5) for a research grant.
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Ferreira, J.H.A., Medeiros, A.M.A.B., Peres, R.M. et al. Ultra-Sensitive Determination of Fenitrothion Pesticide in Orange Juice by Gold-Printed Electrode Modified with AgNP/Carbon Dot/MWCNT Nanoarchitecture Employing Electrochemical Impedance Spectroscopy. Food Anal. Methods (2024). https://doi.org/10.1007/s12161-024-02614-9
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DOI: https://doi.org/10.1007/s12161-024-02614-9