Abstract
Cubic copper hexacyanoferrate (CuHCF) nanoparticles prepared via electrolytic deposition are presented with their morphology and crystalline structure characterized with SEM and XRD. The advantage of this methodology is that it allows the fabrication of uniform cubic nanoparticles with permeable structures onto the desired underlying electrode substrate. It was observed that the CuHCF film acts as a permeable membrane for cations such as K+, Na+, Li+, and with a selection order of K+Li+Na+. Furthermore, the analytical utility of these cubic-like CuHCF morphologies supported on a glassy carbon electrode was evaluated towards the electrochemical oxidation of hydrazine which was found to exhibit a linear response over the range 66 M to 17 mM with a detection limit corresponding to 16.5 M.
Highlights
There is an increasing demand for simple, inexpensive, and rapid analytical tests to detect biological and environmental compounds
Ever since the pioneering work of Neff [1] and Itaya et al [2] using Prussian blue (PB) modified electrodes, extensive electrochemical studies on PB [3,4,5] and its analogue modified electrodes, such as cobalt hexacyanoferrate (CoHCF), nickel hexacyanoferrate (NiHCF), copper hexacyanoferrate (CuHCF) have been of great interest to electrochemists due to their interesting properties, especially the ability to mediate electrochemical reactions such as electrocatalyzed oxidations; for example, they can be used in biosensing for the detection of glucose [6, 7] and many other important analytes
Hydrazine is widely used in various fields, for example, it is a strong reducing agent used as an oxygen scavenger for corrosion control, and it can be employed as a starting material for different derivatives of hydrazine [8]
Summary
There is an increasing demand for simple, inexpensive, and rapid analytical tests to detect biological and environmental compounds. Adverse health effects on people living near hazardous waste sites caused by hydrazine and its derivatives have been explored in detail [10], and the maximum recommended level of hydrazine is 1 ppm in trade effluents [11]. For these reasons, it is urgently required to provide a sensitive method for the determination of hydrazine in waste water and soil. A feasible way to produce CuHCF films is presented via cyclic voltammetry utilizing a glassy carbon electrode as the underlying electrode substrate. The immobilized CuHCF shows good permeability for various cations using cyclic voltammetry and exhibits electro-catalytic responses towards the sensing of hydrazine suggesting its use as a potential sensor for hydrazine with excellent analytical performances
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