Advanced Cu0.5-xZnxMg0.5Fe2O4/CeO2/ZnFe2O4 nanocomposites: From structural integrity to energy and biomedical functionality

초록

This study presents the synthesis and thorough characterization of a series of novel nanocomposites, Cu0.5xZnxMg0.5Fe2O4 (x = 0.1-0.3)/CeO2/ZnFe2O4, designated as ZCMF@ZC1, ZCMF@ZC2, and ZCMF@ZC3. X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HR-TEM) analyses confirmed the crystalline structures and the successful incorporation of the different phases. Morphological studies using field emission scanning electron microscopy (FESEM) and TEM revealed uniformly distributed nanoparticles with sizes in the range of 11-15 nm. Elemental analysis through energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) verified the composition and indicated the presence of mixed oxidation states among the constituent elements. Fourier transform infrared (FTIR) spectroscopy identified characteristic metal-oxide bonds. Brunauer-Emmett-Teller (BET) measurements showed mesoporous features, with specific surface areas between 8.7 and 11 m2/g. Magnetic measurements demonstrated superparamagnetic behavior across all samples, with ZCMF@ZC2 exhibiting the highest saturation magnetization (Ms) of 25.91 emu/g. Electrochemical testing, including cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD), revealed prominent pseudocapacitive behavior, with ZCMF@ZC2 achieving a maximum specific capacitance (Cs) of 340 F/g at 1 A/g and excellent rate capability. Biocompatibility assessments, performed using MTT and live/dead cell assays, confirmed that all composites maintained cell viability above 80 %. These findings highlight the promising potential of synthesized nanocomposites for applications in both energy storage devices and biomedical fields.

키워드