Innovative High-Performance Antimicrobial Agent and Dye Adsorbent Based on Magnetic/Copper Nanoparticles

This study focuses on the synthesis and characterization of new magnetic nanoparticles complexed with copper, designated as Fe3O4@gly@cyclohexylidene-spiro[indoline-[1,3]dithiine]@Cu (FMNP). The structural confirmation of these nanoparticles was achieved through several techniques, including SEM imaging, VSM curves, XRD patterns, TGA and DTG curves, ICP-OES spectroscopy, and FT-IR spectrum analysis. Quantum mechanical studies were also conducted to precisely determine the complex’s position. These nanoparticles demonstrated antimicrobial properties against fungal, Gram-negative, and Gram-positive bacterial strains. The minimum fungicidal concentration (MFC) values ranged from 64 to 128 μg/mL, and the minimum bactericidal concentration (MBC) values varied between 8 and 256 μg/mL, indicating superior inhibitory effects on some microbial species compared to existing antibiotics. Furthermore, the FMNP nanoparticles were utilized in fabricating a crosslinked Oxidized Pectin-Fish Collagen Peptides hydrogel (FHGEL) aimed at adsorbing Congo red from aqueous solutions. The study of FHGEL’s adsorption capacity revealed that incorporating 0.03