Experimental methods and characterization of metalated Py-POPs enriched with Fe₃O₄ nanoparticles and the electrochemical detection of 2-phenylphenol in water using cyclic voltammograms.

This work aims to synthesize and characterize FePy-POP, ZnPy-POP, Fe₃O₄@ZnPyPOP, and Fe₃O₄@FePy-POP. The compounds were characterized using various methods. X-ray diffraction (XRD) analysis was conducted using a Bruker D2 PHASER-e diffractometer using Cu-Kα radiation (0.15418 nm). Scanning electron microscopy (SEM) and Energy-dispersive X-ray spectroscopy (EDX) were carried out on a crossbeam 540 FEG SEM microscope from Zeiss. Transmission electron microscopy (TEM) images were observed using a JOEL JEM 2100F. UV-Vis absorption measurements were taken on a CARY 100 BIO UV-Vis spectrophotometer. FTIR spectroscopy was carried out using Brunker Alpha Fourier transform spectroscopy with platinum attenuated total reflectance (ATR) sampling accessory. These compounds were used as catalysts on a modified glassy carbon electrode (GCE) to enhance electrochemical detection of 2- phenylphenol in water and real samples. An Autolab potentiostat was used to carry out the electrochemical experiments. A three-electrode setup was employed to collect cyclic voltammetry data. The working electrode was a glassy carbon electrode and was polished with a slurry of alumina on a Buehler felt pad and rinsed with millipore water. The counter electrode was a platinum wire, while the reference electrode was a Ag/AgCl wire.