Sorption Mechanisms of Cesium on CuII2FeII(CN)6and CuII3[FeIII(CN)6]2Hexacyanoferrates and Their Relation to the Crystalline Structure

Cubic Copper Hexacyanoferrates Nanoparticles: Facile Template-Free Deposition and Electrocatalytic Sensing Towards Hydrazine

“…The cyclic voltammetric response of the bare electrode and modified electrode in a solution of 66 μM hydrazine in pH 7 PBS is depicted in Figure 2(c), where it can be observed that the modified electrode results in an increase in oxidation peak current towards the electrochemical oxidation of hydrazine indicating an electro-catalytic nature of the CuHCF cubic nanoparticles. As is reported in literature [12], the pair of peaks observed in Figure 2(c) are likely due to the redox processes of Fe(II)/Fe(II) with the potential difference between them due to the K + pairing saturation level of the iron centers.…”

“…Characterization of the CuHCF films via SEM indicates a uniform and compact surface covered with highly ordered cubic nanoparticles with analysis via XRD confirming that the highly ordered nano-particles have a high degree of crystallization. Note that there are many reports of utilizing metals hexacyanoferrates as electrocatalytic substrates, but we find only two reports which have cubic and nanomorphologies [12,13]. 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.…”

“…The good permeability of Li + can be reasonably explained in terms of a partial dehydration of hydrated Li + that reduces the cation to an appropriate size to enter the lattice. [20,21] The radii of naked ions Li + , Na + , K + , NH 4 and those of hydrated ions are 2.1, 1.8, 1.25, and 1.25Å, respectively; after complete dehydration, naked Li + has the smallest radius, which may be a prerequisite for it to be incorporated into the CuHCF lattice [12]. Figure 2(a) shows cyclic voltammetric responses of the CuHCF-modified electrode recorded in KNO 3 electrolytes with K + concentrations varied from 0.01 to 0.15 M. With increasing K + concentration, the voltammetric peak potentials were shifted to more positive potentials, and the result is in good agreement with the involvement of potassium ions in the redox reaction [21].…”

An Inverse Gas Chromatography Study of the Adsorption of Organics on Nickel- and Copper-Hexacyanoferrates at Zero Surface Coverage

“…In Cu II (CN) 6 , two different sites exist, atoms Cu1 are linked to the CN network while atoms Cu2 are not. Previous studies on these types of hexacyanoferrates (15,16) 6 and Na 2 NiFe II (CN) 6 , respectively. The BJH evaluation of the pore distribution indicates a large number of pores with diameters lower than 3 nm for the first compound, while the majority of pores are between 13 and 65 nm for the second one.…”

Determination of vitamin B6 (pyridoxine) in pharmaceutical preparations by cyclic voltammetry at a copper(II) hexacyanoferrate(III) modified carbon paste electrode

“…A method previously reported in the literature 24 for the preparation of CuHCF was adopted. This compound was prepared by precipitation by mixing a 0.125 mol L …”