A Novel Synthesis of Zn2+-Doped CoFe2O4 Spinel Nanoparticles: Structural, Morphological, Opto-magnetic and Catalytic Properties

摘要: Zn2+-doped CoFe2O4 (Zn x Co1−x Fe2O4: where x= 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0) spinel nanoparticles (NPs) were synthesized by microwave combustion method using nitrates of cobalt, zinc, iron as the starting materials urea used fuel. Powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR), energy dispersive (EDX), selected area electron (SAED) pattern analyses showed that all composition was found to have pure cubic structure with well crystalline nature. The average crystallite size samples be in range 25.43 29.46 nm. lattice parameter increased from 8.432 8.441 A increasing Zn2+ content, due smaller ionic radius Co2+ substituted larger Zn2+, which determined Rietveld analysis. High-resolution scanning microscopy (HR-SEM) transmission (HR-TEM) study morphological variation, results a nano-sized spherical-shaped particle-like morphology. band gap (E g) undoped estimated 2.69 eV UV-Vis diffuse reflectance spectroscopy (DRS). With increase dopant, E g value decreased 2.61 2.01 eV, difference particle samples. magnetic hysteresis (M−H) loop confirmed ferromagnetic nature magnetization (M s) 64.85 emu/g, it is content spinel, vibrating sample magnetometer (VSM). All Zn Fe2O4 successfully tested catalyst for conversion benzyl alcohol, has resulted 91.73 95.82 % efficiency Zn0.4Co0.6Fe2O4 nano-catalysts, respectively.