Exploring the synergistic correlation of structure, electrochemical, and biocompatibility in Mg0.5CaxZn0.5-xFe2O4 /CeO2/MnFe2O4 nanocomposites

초록

The Mg0.5CaxZn0.5-xFe2O4 (x = 0.1 and 0.2)/CeO2/MnFe2O4 nanocomposites, designated as CZMMC-1 and CZMMC-2, were systematically characterized to explore their structural, morphological, magnetic, electrochemical, and biocompatibility features. A range of analytical techniques, including XRD, FE-SEM, TEM, FTIR, XPS, BET, EPR, VSM, and electrochemical analyses was employed. XRD patterns verified the successful formation of multiphase ferrite composites, with CZMMC-2 exhibiting sharper peaks, reflecting higher crystallinity and larger crystallite dimensions. FE-SEM and TEM micrographs revealed nearly spherical, agglomerated particles, where CZMMC-2 showed improved particle distribution and tighter packing. EDS and elemental mapping confirmed homogeneous composition across the samples. FTIR spectra identified hydroxyl, carboxylate, and metal-oxygen vibrational bands, while XPS results substantiated the oxidation states of the constituent elements. BET surface area analysis indicated a mesoporous structure with values of 18.01 m(2)/g for CZMMC-1 and 15.75 m(2)/g for CZMMC-2. EPR spectra indicated the existence of paramagnetic centers, slightly more prevalent in CZMMC-2, and VSM measurements revealed superparamagnetic behavior for both nanocomposites. Electrochemical investigations using CV, GCD, and EIS demonstrated superior capacitive properties in CZMMC-2. Moreover, MTT and Live/Dead assays confirmed high cell viability (>80 %) for both normal BLO-11 (murine muscle fibroblasts) and cancer CT-26 (murine colorectal carcinoma) cell lines, validating the biocompatible nature of the prepared nanocomposites.

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