Room-Temperature Superparamagnetism and Enhanced Photocatalytic Activity of Magnetically Reusable Spinel ZnFe2O4 Nanocatalysts

Room-Temperature Superparamagnetism and Enhanced Photocatalytic Activity of Magnetically Reusable... Spinel ZnFe2O4 nanoparticles (NPs) were successfully synthesized by a simple microwave irradiation method (MIM) using glycine as the fuel. For the comparative study purpose, it was also prepared by a conventional heating (CHM) method. Powder X-ray diffraction (XRD), Fourier transform infrared (FT-IR), high-resolution scanning electron microscope (HR-SEM), high-resolution transmission electron microscope (HR-TEM), energy-dispersive X-ray (EDX) spectra, and selected area electron diffraction (SAED) analysis showed that the samples were pure-phase spinel ZnFe2O4 nanoparticle-like morphology without any other secondary-phase impurity. UV-Visible diffuse reflectance spectra (DRS) and room temperature photoluminescence (PL) spectra confirmed the optical band gap (E g) and defect state of the samples. The calculated E g values of the samples are 1.98 and 2.11 eV for ZnFe2O4-CHM and ZnFe2O4-MIM, respectively. Vibrating sample magnetometer (VSM) analysis shows that the M s value is 37.66 emu/g for ZnFe2O4-MIM, which is higher than the ZnFe2O4-CHM (24.23 emu/g) sample, which confirms that both the products showed a superparamagnetic behavior. ZnFe2O4-MIM was found to have a higher surface area than ZnFe2O4-CHM, which in turn leads to the improved performance towards the photocatalytic degradation (PCD) of methylene blue (MB), and it was found that the sample ZnFe2O4-MIM shows a higher PCD efficiency (91.43%) than ZnFe2O4-CHM (84.65%); also, the samples show high activity, good reusability, remarkable stability, and environmentally friendly materials for industrial and technological applications. Journal of Superconductivity and Novel Magnetism Springer Journals

Room-Temperature Superparamagnetism and Enhanced Photocatalytic Activity of Magnetically Reusable Spinel ZnFe2O4 Nanocatalysts

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Springer US
Copyright © 2017 by Springer Science+Business Media New York
Physics; Strongly Correlated Systems, Superconductivity; Magnetism, Magnetic Materials; Condensed Matter Physics; Characterization and Evaluation of Materials
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