Facultad de Ciencias Básicas

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Obtención de ferritas deficientes en cobre mediante combustión asistida con glicerina y su aplicación como material de electrodo
(Universidad Santiago de Cali, 2023-11-01) Alfonso González, José Guillermo; Morales Morales, Jimmy Alexander; Dector Espinoza, Andrés
Copper-deficient cobalt ferrite nanoparticles were synthesized using a simple combustion method. Various polyalcohol trials were conducted, demonstrating the effectiveness of glycerol as a cosolvent in facilitating the preparation of electrode-modifying nanomaterials. An eight-hour resting period before calcination resulted in a reduction in the secondary phase of hematite. This synthesized material was employed as an electrode material for acetaminophen detection under acidic conditions (pH 2.5). The findings revealed a limit of detection (LOD) of 99.4 nM, a limit of quantification (LOQ) of 331 nM, and a relative standard deviation (RSD) of 3.31%. The superior electrocatalytic activity of the electrode modified with copper-deficient cobalt ferrite (Co0.87Cu0.13Fe2O4/GCE) was strongly correlated with its charge transfer resistance (Rct), as determined using electrochemical impedance spectroscopy (EIS), which defined its electron transfer capability. Importantly, the LOD obtained for Co0.87Cu0.13Fe2O4/GCE in this study (99.4 nM) is lower than that of other electrodes examined. These results indicate the potential for acetaminophen determination in human urine samples using this modified electrode