Transmission Electron Scattering (TEM) Microscopy, X-Ray Diffractometer, and Raman Spectroscopy

Abstract

Zinc ferrite (ZnFe₂O₄) nanoparticles possess remarkable magnetic and catalytic properties, making them ideal candidates for applications in energy, electronics, and environmental remediation. This study presents a comparative analysis of ZnFe₂O₄ nanoparticles synthesized using two distinct methods: conventional combustion and microwave-assisted combustion. The synthesized samples were thoroughly characterized using XRD, FTIR, HR-SEM, TEM, UV-Vis spectroscopy, PL spectroscopy, BET surface area analysis, and VSM measurements. Both synthesis routes successfully yielded nanostructured ZnFe₂O₄ with a cubic spinel phase. However, the microwave method led to smaller crystallite sizes, increased surface area, and enhanced saturation magnetization compared to the conventional approach. SEM and TEM revealed that microwave combustion promoted the formation of well-defined nanorods and reduced agglomeration. Optical studies showed band gap variations attributable to morphological and structural differences. Catalytic activity was evaluated via the oxidation of alcohols using H₂O₂ as a green oxidant. Microwave-synthesized ZnFe₂O₄ displayed superior catalytic performance due to its higher surface area and active site density. This work underscores the significance of synthesis technique in tuning the physicochemical properties of ferrite nanomaterials and offers insights into designing efficient catalysts through advanced combustion strategies