Voltammetric and spectroscopic studies of water/formamide ratios in the production of the cerium (III) hexacyanoferrate (II) nanoparticles

• Published in: Journal of the Chinese Chemical Society (Taipei) 2023-01, Vol.70 (1), p.87-100
• Main Authors: Carmo, Devaney Ribeiro, Oliveira, Denys Ribeiro
• Format: Article
• Language: English
• Subjects: Cerium; cerium (III) hexacyanoferrate (II); Dopamine; Electrical measurement; electrochemical sense; Fourier transforms; L‐dopamine; metal nanoparticles; Nanoparticles; Size distribution; Voltammetry; Zeta potential
• ISSN: 0009-4536; 2192-6549
• DOI: 10.1002/jccs.202200449

The present study describes the simple and fast preparation of Cerium (III) hexacyanoferrate (II) (CeHCF) solid nanoparticles at three different water/formamide (%) ratios used as solvent (v/v) (100:0, 80:20, 0:100). CeHCF nanoparticles (Nps) were characterized by fourier transform infrared pectroscopy (FTIR), x‐ray diffraction (XRD), scanning electron microscopy (SEM), zeta potential and cyclic voltammetry (CV). Electrodes modified with CeHCF presented a well‐defined redox pair with formal potential (Eo′) of approximately 0.29 V (vs. Ag/AgCl(sat) attributed to the Fe2 +/Fe3+ redox pair in the presence of cerium (III)). The Nps in the three systems investigates, presents a random size distribution to different surface, where most were distributed between 20 and 160 nm. Considering the three investigated systems, only CeHCF‐1 (100:0) was sensitive to L‐dopamine, presenting a linear signal region as a function of L‐dopamine concentrations, with a limit of detection (LD) of 0.125 mmol L−1, limit of quantification (LQ) of 0.419 mmol L−1 and amperometric sensitivity (S) of 148.16 μA mmol L−1. Scanning electron microscopy images for CeHCF‐1 (a), CeHCF‐2 (b), and CeHCF‐3 (c) systems revealed spherical nanoparticles with a random size distribution on different surfaces, most distributed between 20 and 160 nm. The three systems presented a well‐defined redox pair with formal potential (Eo′) of approximately 0.29 V attributed to the Fe2 +/Fe3+ redox pair in the presence of cerium (III).