Potential electrode based on montmorillonite and amino acid hybrid for the retention of MTZ

• Published in: Journal of applied electrochemistry 2023-02, Vol.53 (2), p.331-343
• Main Authors: Touati, Mouna, Maatoug, Manel, Mellah, Besma, Benna, Memia Zayani
• Format: Article
• Language: English
• Subjects: Amino acids; Chemistry; Chemistry and Materials Science; Electrochemistry; Electrodes; Industrial Chemistry/Chemical Engineering; Infrared spectroscopy; Montmorillonite; Optimization; Physical Chemistry; Research Article; Thermal analysis
• ISSN: 0021-891X; 1572-8838
• DOI: 10.1007/s10800-022-01763-1

The preparation of a hybrid containing arginine and Na montmorillonite (Na-Mt) was optimized by studying the effect of several parameters. The obtained samples were characterized by X-ray diffraction (XRD), infrared spectroscopy (IR), and differential scanning calorimetry (DSC). These techniques approved the modification by the increase of the basal distance and the shift of the characteristic peaks of thermal analysis. The hybrid obtained in the optimal conditions was selected, incorporated in a graphite-based electrode, and tested in the analysis of the active molecule metronidazole (MTZ) by cyclic voltammetry (CV). The best electrochemical response was obtained in the conditions (pH = 9, CEC = 2, and stirring time = 12 h) and an optimum amount of hybrid was required in the electrode composition to have a well-defined cathodic peak corresponding to the reduction of MTZ. Results showed that the elaborated electrode reaction exhibits a diffusion-controlled process which is in agreement with several studies using other types of electrodes. Graphical abstract