Affordable electrochemical sensor for cyanide, pyrrole and glucose sensing Olayemi Jola Fakayode, Thabo T.I. NKambule Institute for Nanotechnology and Water Sustainability, University of South Africa, South Africa Monitoring potential, emerging and established chemicals (contaminants/pollutants) in water is an important aspect of obtaining cleaner and safe water for domestic and industrial use. Moreover, most of existing technologies are either very expensive to maintain or unaffordable to purchase, especially for people in the developing world. In addition, it may be that the analytical methods for monitoring such disturbances are yet to be developed. This work presents the synthesis, characterization and application of silver nano-dumbbell particles for the monitoring of cyanide, pyrrole and glucose in water. The nanosensor was prepared using a one-electron reducing alkaline glucose solution at room temperature. No heating, agitation or pressure was necessary. After, its synthesis, water was used as the purifying solvent. The nanomaterial evolved as a hydrophobic solid bar. It was finally obtained as a powder after grinding or milling. Ferrocyanide is an important probe used for the characterization of an electrode's redox activities. Pyrrole is an organic compound precursor for many organic molecule syntheses, while glucose is an established biomarker for diabetes disease. Due to the prevalent use of these chemicals, it is highly unexpected to see their levels rise consistently in the environmental water. Remarkable differences were observed in the voltammograms of the silver nano-dumbbell particles and those of the CuO nanoparticles and conventional gold-plated electrodes during the cyanide and pyrrole sensings, suggesting different routes of interactions. The rationale behind these interactions, charge transfer characteristics, Laviron’s modelling process, various LODs and LOQs, kinetics, associated mechanisms of interactions and movement away from the present studies are well described.
P17
© The Author(s), 2023
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