Structural and magnetic properties of cobalt ferrite nanoparticles doped with cadmium

Ghorbani, Hamid Reza; Eshraghi, M.; Sabouri, Ali Akbar

doi:10.1016/j.physb.2022.413816

Cited by 24 publications

(18 citation statements)

References 45 publications

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“…This reflects the progressive increase of cobalt content (Figure 3b). Similarly, some reports specified that the lattice parameter for magnetite was determined to be 8.36 Å [24] or 8.39 Å for cobalt ferrite [22,25]. The increase in lattice parameter with cobalt content was also reported in [26].…”

Section: Xrd Investigation Resultsmentioning

confidence: 93%

Cobalt Ferrite Nanoparticles Capped with Perchloric Acid for Life-Science Application

et al. 2023

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Among the modern oncological therapies, one of the most promising is based on tumor hyperthermia with magnetic nanoparticles resulting from the crystallization of iron and cobalt oxides. We synthesized core–shell magnetic nanoparticles of perchlorate-CoxFe3−xO4 (x = 0; 0.5; 1.0) via the co-precipitation method and stabilized them in aqueous suspensions. Fine granulation of the dispersed ferrophase was revealed by Transmission Electron Microscopy and Dynamical Light Scattering, with FTIR data detailing the surface-interaction phenomena. X-ray diffractometry revealed specific crystallization features of inverse spinel lattice, providing crystallite size and lattice parameters dependent on the cobalt content. The results of the Vibrating Sample Magnetometry investigations indicated that cobalt doping has reduced the magnetic core size and increased the nanoparticle dimension, which could be the result of crystallization defects at the nanoparticle surface related to the presence of cobalt ions. A mathematical model was applied with a focus on the quantitative description of the temperature distribution around magnetic nanoparticles. Further development of our research will consider new cobalt ferrite nanoparticles with new cobalt contents and different organic coatings to contribute to their biocompatibility and stability in aqueous suspensions, as required by administration in living organisms.

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Section: Xrd Investigation Resultsmentioning

confidence: 93%

Cobalt Ferrite Nanoparticles Capped with Perchloric Acid for Life-Science Application

et al. 2023

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Section: Magnetic Analysismentioning

confidence: 96%

“…Similarly, the anisotropy of Fe-site doping increases, resulting in an increase in the total magnetic moment with an increase in the doping ratio. Compared with other dopants, Re-doped cobalt ferrite maintains a higher total magnetic moment [44,49], indicating an increase in the anisotropy resulting from doping Re. When comparing Co-site doping and Fe-site doping, the decrease in M s and H c in Co-site doping and increase in M s and H c in Fe-site doping are closely related to the change in magnetocrystalline anisotropy resulting from Re doping.…”

Section: Magnetic Analysismentioning

confidence: 96%

“…Specifically, A 1g (2) and A 1g (1) peaks at 621 and 685 cm −1 , respectively, can be attributed to the Fe 3+ -O and Re 2+ -O bonds at tetrahedral voids (AO 4 ) [40,43]. The T 2g (2) and T 2g (1) at 460 and 567 cm −1 , respectively, are attributed to the asymmetry bending motions of the oxygen in Fe 3+ -O and Re 2+ -O bonds at tetrahedral voids, and T 2g (3) at 195 cm −1 is derived from the vibration of cations in octahedral voids [44]. The E g peaks at 300 cm −1 correspond to the symmetric oxygen bending in AO 4 units [45,46].…”

Section: Raman Analysismentioning

confidence: 99%

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Effects of Rhenium Substitution of Co and Fe in Spinel CoFe2O4 Ferrite Nanomaterials

Zheng

Hussain

et al. 2022

Nanomaterials

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In this work, nanoparticles of Co1−xRexFe2O4 and CoFe2−xRexO4 (0 ≤ x ≤ 0.05) were synthesized by the sol-gel method. The Rietveld refinement analysis of XRD and Raman data revealed that all of the prepared samples were single phase with a cubic spinel-type structure. With the substitution of Re, the lattice parameters were slightly increased, and Raman spectra peak positions corresponding to the movement of the tetrahedral sublattice shifted to a higher energy position. Furthermore, Raman spectra showed the splitting of T2g mode into branches, indicating the presence of different cations at crystallographic A- and B-sites. The SEM micrograph confirms that surface Re exchange changes the coordination environment of metals and induces Fe-site structure distortion, thereby revealing more active sites for reactions and indicating the bulk sample’s porous and agglomerated morphology. The vibrating sample magnetometer (VSM) results demonstrated that the synthesized nanoparticles of all samples were ferromagnetic across the entire temperature range of 300–4 K. The estimated magnetic parameters, such as the saturation magnetization, remanent magnetization, coercivity, blocking temperature (TB), and magnetic anisotropy, were found to reduce for the Co-site doping with the increasing doping ratio of Re, while in the Fe site, they enhanced with the increasing doping ratio. The ZFC-FC magnetization curve revealed the presence of spin-glass-like behavior due to the strong dipole–dipole interactions in these ferrite nanoparticles over the whole temperature range. Finally, the dielectric constant (εr′) and dielectric loss (tanδ) were sharply enhanced at low frequencies, while the AC conductivity increased at high frequencies. The sharp increases at high temperatures are explained by enhancing the barrier for charge mobility at grain boundaries, suggesting that samples were highly resistive. Interestingly, these parameters (εr′, tanδ) were found to be higher for the Fe-site doping with the increasing Re doping ratio compared with the Co site.

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“…As such, nanoparticles and nanomaterials had been attracting special attention due to their biocompatibility, chemical stability, efficacy in the separation process, higher adsorption efficiency and strength in the suspension medium [ 32 ]. Some nanoparticles and their composites such as iron nanoparticles (NPs) [ 33 ], nickel NPs [ 34 ], cobalt NPs [ 35 ], Fe 3 O 4 graphene biochar composite [ 36 ], graphite nickel NPs composite [ 37 ], nickel NPs multiwalled carbon nanotubes [ 32 ], treated and functionalized carbon nanotubes [ 38 ], cobalt NPs activated carbon composite [ 39 ], iron NPs graphene oxide chitosan composite [ 40 ], silver nanoparticles-carbon nanotubes composites [ 41 ] and zero-valent iron/zeolite composite [ 42 ] have been prepared for the removal of both organic and inorganic pollutants from industrial wastewater.…”

Section: Introductionmentioning

confidence: 99%

Column adsorption of biological oxygen demand, chemical oxygen demand and total organic carbon from wastewater by magnetite nanoparticles-zeolite A composite

Kovo¹,

Alaya-Ibrahim²,

Abdulkareem³

et al. 2023

Heliyon

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Structural and magnetic properties of cobalt ferrite nanoparticles doped with cadmium

Cited by 24 publications

References 45 publications

Cobalt Ferrite Nanoparticles Capped with Perchloric Acid for Life-Science Application

Cobalt Ferrite Nanoparticles Capped with Perchloric Acid for Life-Science Application

Effects of Rhenium Substitution of Co and Fe in Spinel CoFe2O4 Ferrite Nanomaterials

Column adsorption of biological oxygen demand, chemical oxygen demand and total organic carbon from wastewater by magnetite nanoparticles-zeolite A composite

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