Development of a CuFe2O4 - Reduced Graphene Oxide-Based Electrochemical Sensor for Malathion

A portable non-enzymatic electrochemical sensor for malathion detection based on CuFe2O4 and reduced graphene oxide nanocomposites was developed. CuFe2O4-rGO nanocomposites were synthesized using a facile one-pot co-precipitation method. X-ray diffraction, scanning electron microscopy, Fourier-trans...

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Bibliographic Details
Published in:Key engineering materials 2020-05, Vol.841, p.41-47
Main Authors: Battad, Georgette Anne T., Mopon Jr, Marlon L., Estacio, Jericho G., Indiongco, Junel Lawrence C.
Format: Article
Language:English
Subjects:
Buffer solutions
Chemical sensors
Electrochemical analysis
Fourier transforms
Graphene
Nanocomposites
Raman spectroscopy
Selectivity
Sensors
Spectrum analysis
Square waves
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Summary:A portable non-enzymatic electrochemical sensor for malathion detection based on CuFe2O4 and reduced graphene oxide nanocomposites was developed. CuFe2O4-rGO nanocomposites were synthesized using a facile one-pot co-precipitation method. X-ray diffraction, scanning electron microscopy, Fourier-transform infrared spectroscopy, and Raman spectroscopy confirmed successful synthesis of the nanocomposites. Square wave voltammetry was performed using a portable potentiostat (CheapStat) and a three-electrode setup in order to determine the electrochemical behavior of the nanocomposite and its interaction with malathion. Maximum inhibition was observed at conditions corresponding to 15% rGO loading, pH 4 buffer solution, and five-minute accumulation time. Calibration of the sensor established a linear detection range of 0.5-8 ppm and a detection limit of 0.992 ± 0.007 ppm. Altogether, the performance parameters indicate good selectivity and potential applicability of the system for malathion monitoring particularly in agricultural products.
ISSN:1013-9826
1662-9795
1662-9795
DOI:10.4028/www.scientific.net/KEM.841.41