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Spinel ferrites are widely investigated for their widespread applications in high-frequency and energy storage devices. This work focuses on enhancing the magnetic and dielectric properties of Ni0.25Cu0.25Zn0.50 ferrite series through non-thermal microwave plasma exposure under low-pressure conditions. A series of Ni0.25Cu0.25Zn0.50 ferrites was produced using a facile sol-gel auto-ignition approach. The post-synthesis plasma treatment was given in a low-pressure chamber by sustaining oxygen plasma with a microwave source. The structural formation of control and plasma-modified ferrites was investigated through X-ray diffraction analysis, which confirmed the formation of the fcc cubical structure of all samples. The plasma treatment did not affect crystallize size but significantly altered the surface porosity. The surface porosity increased after plasma treatment and average crystallite size was measured as about similar to 49.13 nm. Morphological studies confirmed changes in surface morphology and reduction in particle size on plasma exposure. The saturation magnetization of plasma-exposed ferrites was roughly 65% higher than the control. The saturation magnetization, remnant magnetization, and coercivity of plasma-exposed ferrites were calculated as 74.46 emu/g, 26.35 emu/g, and 1040 Oe, respectively. Dielectric characteristics revealed a better response of plasma-exposed ferrites to electromagnetic waves than control. These findings suggest that the plasma-exposed ferrites are good candidates for constructing high-frequency devices. Web of Science 15 19 art. no. 6890

The cost-effective modernized technology, the sol–gel method was employed to synthesize SnO2 nanotubes. Different characterization techniques were carried out including X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), energy-dispersive spectroscopy (EDX), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV) measurements; to analyze the prepared nanotubes as a promising electrode material. The tetragonal phase formation in SnO2 was confirmed from the XRD pattern. FESEM provided the nanotube morphology of the as-synthesized sample. EDX analysis profiled the elemental analysis depicting the presence of constitutional elements i.e. Sn, C, and O in the specimen. The valence states of SnO2 nanotubes were perceived by XPS analysis. Additionally, the ongoing electrode reactions were investigated by CV measurements which revealed the anodic/cathodic peaks. High specific capacitance of about 1291.15 F/g was achieved from CV analysis. The superior electrochemical performance was perceived by all the obtained results which make the SnO2 nanotubes a favorable electrode material for futuristic battery applications.