Dual-functional MgxZn0.5Cu0.5-xFe2O4/graphitic carbon nitride nanocomposites with supercapacitive and biocompatible performance

초록

The MgxZn0.5Cu0.5-xFe2O4 (x = 0.1-0.3)/graphitic carbon nitride (g-C3N4) nanocomposites were successfully synthesized and labeled as ZCMFG-1, ZCMFG-2, and ZCMFG-3. Structural characterization using XRD and HRTEM confirmed the formation of highly crystalline, multiphase systems composed of g-C3N4 coupled with spinel ferrite phases, including MgFe2O4, ZnFe2O4, and CuFe2O4. FE-SEM and TEM analyses exposed uniformly distributed, polyhedral nanoparticles with granular morphology, with particle size gradually increasing from ZCMFG-1 to ZCMFG-3, indicating enhanced crystallinity and facet development. EPR spectroscopy verified the presence of unpaired electron spins, while VSM confirmed superparamagnetic behavior for ZCMFG-1, ZCMFG-2, and ZCMFG-3, with ZCMFG-2 demonstrating the maximum saturation magnetization (Ms = 39.12 emu g(-1)). Among the composites, ZCMFG-2 showed superior electrochemical performance, achieving a specific capacitance (Cs) of 102.6 F g(-1) at 1 A g(-1) and exhibiting rapid ion transport kinetics, as evidenced by galvanostatic charge - discharge (GCD) measurements. In addition, all nanocomposites displayed excellent biocompatibility toward both normal mouse muscle fibroblast (BLO-11) and murine colorectal carcinoma (CT-26) cancer cell lines, maintaining cell viability above 80% even at a concentration of 1000 mu g/mL. These outcomes highlight the strong potential of prepared nanocomposites for multifunctional applications.

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