Comprehensive study of magnetic and optoelectronic properties of MgFe2O4–TiO2 nanocomposites

Pure MgFe2O4 and TiO2 nanoparticles have been synthesized using co-precipitation and sol-gel method, respectively. A facile ultrasonication method is used to prepare MgFe2O4– TiO2 nanocomposites (NCs) with varying concentration of TiO2. Effect of varying TiO2 concentration in different NCs on micros...

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Bibliographic Details
Published in:Materials chemistry and physics 2021-10, Vol.271, p.124911, Article 124911
Main Authors: Vaish, Garima, Kripal, Ram, Kumar, Lokendra
Format: Article
Language:English
Subjects:
Electron paramagnetic resonance
EPR
Fourier transforms
Hematite
Impurities
Infrared analysis
Magnesium ferrites
Magnetic properties
Magnetometers
MgFe2O4
Nanocomposite
Nanocomposites
Nanoparticles
Optoelectronics
Phases
Photoluminescence
Relaxation time
Sol-gel processes
Spectrum analysis
Spin–spin relaxation time
Synthesis
Titanium dioxide
VSM
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Summary:Pure MgFe2O4 and TiO2 nanoparticles have been synthesized using co-precipitation and sol-gel method, respectively. A facile ultrasonication method is used to prepare MgFe2O4– TiO2 nanocomposites (NCs) with varying concentration of TiO2. Effect of varying TiO2 concentration in different NCs on microstructural and morphological properties have been investigated using X-ray diffraction (XRD), High Resolution-Transmission Electron Microscopy (HR-TEM) and Fourier transform Infrared (FTIR) analysis. These studies confirm the presence of dominant nanocomposite phases of MgFe2O4 and TiO2 along with two impurity phases, Hematite and Armalcolite, in the synthesized NCs. Impact of TiO2 content and the presence of impurity phases on the magnetic and optoelectronics properties have been discussed comprehensively for future applications. UV–Visible (UV/Vis) and Photoluminescence (PL) spectra yield the band gap of composite to be tuned and quite useful for photocatalytic applications. Magnetic properties of the pure and composite samples are studied using Vibrating Sample Magnetometer (VSM). Further, the electronic and magnetic properties of the powdered samples are explored using Electron Paramagnetic Resonance (EPR) Spectroscopy. Variation in g value, peak-to-peak line width (Hpp), resonance field (Hr) and spin–spin relaxation time (T2) for different samples provide useful information about electronic properties of the composite system. [Display omitted]
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2021.124911