ZnFe2O4 mixed spinel ferrite nanoparticles obtained through a citrate-nitrate combustion method. Ignited products calcined at different temperatures in 600-900ºC range and effect of calcination treatment temperature investigated. Final Products characterized by X-ray Diffraction (XRD), Fourier-Transform Infrared spectroscopy (FTIR), and Field Emission Scanning Electron Microscopy (FESEM). The a...

The selective oxidation of tetrahydrofuran (THF) to gamma-butyrolactone (GBL) on spinel ZnFe2O4 nanoparticles (ZFNPs) was investigated. catalyst prepared with the coprecipitation method and characterized by FTIR, XRD, TEM, SEM, EDS, TGA, XPS, BET surface area. characterization techniques showed that a nonuniform spherical spinal oxide an average particle size 26 nm formed. reaction carried out ...

In this work, a mineralogical study and thermal decomposition analysis of jarosite residue sample from zinc plant were carried out. The showed that the is mainly composed four components, including jarosites, sulfates–hydroxides, sulfides spinel. distribution relevant metallic elements in these components was characterized using sequential extraction process. X-ray diffraction results AFe3(OH)6...

superparamagnetic single phase zinc ferrite nanoparticles have been prepared by coprecipitation method at 20 °c without any subsequent calcination. the composition, crystallite size, microstructure and magnetic properties of the prepared nanoparticles were investigated using x-ray diffraction (xrd), field emission scanning electron microscope (fesem), transmission electron microscope (tem), fou...

The composites of the form 0.5ZFO + 0.4BFO 0.1GFO (S1) and 0.75ZFO 0.2BFO 0.05GFO (S2) synthesized by solid state route are reported in this study. These were subjected to structural, energy bandgap dielectric studies. XRD spectral analysis confirms that all three phases present samples under BiFeO3 phase has acquired orthorhombic (Pnma) crystal structure, ZnFe2O4 crystallized into cubic (Fd-3m...