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. 2024 Mar 23;14(1):6935.
doi: 10.1038/s41598-024-57134-7.

Enhancement of magnetization and optical properties of CuFe2O4/ZnFe2O4 core/shell nanostructure

A M Faramawy  1 , H M El-Sayed  2
Affiliations

Enhancement of magnetization and optical properties of CuFe2O4/ZnFe2O4 core/shell nanostructure

A M Faramawy et al. Sci Rep. .

Abstract

In this work, core/shell of CuFe2O4/ZnFe2O4 nanostructure composite was prepared by hydrothermal method. X-ray diffraction (XRD) analysis, transmission electron microscope imaging, energy dispersive X-ray (EDX), and Fourier transform infrared techniques were used to prove the phase formation, morphology, elemental analysis, and cation distribution of core/shell structure, respectively. Furthermore, measurement of the optical properties proved the decrease of photoluminescence (PL) efficiency. The magnetic measurements showed an enhancement of the magnetization by about 63% relative to pure Cu ferrite, and the magnetization curve exhibited superparamagnetic behavior. These results were explained in terms of the depression of the magnetic dead layer thickness in the core/shell structure. The results unleash the promising applications of the prepared samples as transformer cores in the high frequency range and as a photocatalytic agent for water purification and hydrogen production.

Keywords: AC magnetic loss; Magnetic core shell; Magnetic dead layer; Photoluminescence; Superparamagnetic.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Figure 1
Figure 1
Schematic diagram for the synthesis of the core/shell composite samples by hydrothermal method.
Figure 2
Figure 2
XRD patterns of CuFe2O4, ZnFe2O4 and CuFe2O4/ZnFe2O4 core/shell samples.
Figure 3
Figure 3
Rietveld refinement profile for (a) ZnFe2O4, (b) CuFe2O4, and (c) CuFe2O4/ZnFe2O4 core/shell nanoparticles using MAUD program.
Figure 4
Figure 4
TEM images of (a) CuFe2O4, (b) ZnFe2O4 nanoparticles, and (c) CuFe2O4/ZnFe2O4 core/shell.
Figure 5
Figure 5
EDX spectra and Mapping of (a) CuFe2O4/ZnFe2O4 core/shell, (b) ZnFe2O4, and (c) CuFe2O4 nanoparticles.
Figure 6
Figure 6
Mapping images of CuFe2O4/ZnFe2O4 core/shell nanoparticles.
Figure 7
Figure 7
FTIR spectra of CuFe2O4, ZnFe2O4 and CuFe2O4/ZnFe2O4 core/shell nanoparticles.
Figure 8
Figure 8
PL spectra for CuFe2O4, ZnFe2O4 and CuFe2O4/ZnFe2O4 core/shell nanoparticles.
Figure 9
Figure 9
Schematic represents the band diagrams of both ferrites (left) and the trapping state occurs due to the interface between the core and shell (right).
Figure 10
Figure 10
Magnetic hysteresis loop of CuFe2O4, ZnFe2O4 and CuFe2O4/ZnFe2O4 core/shell nanoparticles.
Figure 11
Figure 11
(a) ‘Law of approach’ fit to M versus H, and (b) linear fit of M versus 1/H2 for CuFe2O4, ZnFe2O4 and CuFe2O4/ZnFe2O4 core/shell nanoparticles.
Figure 12
Figure 12
Temperature rise with time for CuFe2O4, ZnFe2O4 and CuFe2O4/ZnFe2O4 core/shell nanoparticles.
See this image and copyright information in PMC

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