Cation Distribution Study of Chromium Substituted Copper Nickel Zinc Ferrite

Shinde, B.L.; Lohar, K.S.

doi:10.30731/ijcps.7.3.2018.51-58

Cited by 3 publications

(1 citation statement)

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“…Figure 2 , where a decrease in its value is clearly observed with the increasing Cr 3+ concentration. This effect is due to the smaller ionic radio of Cr 3+ (0.64 Å) in comparison to Fe 3+ (0.67 Å) [33,34] and hence results in more compacts unit cells size with the increases in Cr 3+ content, and therefore, exhibiting a smaller lattice parameter. Further, the crystallite sizes were determined using the Scherrer formula and are shown in figure 3(f) together with average particles size determined from TEM images (figures 3(a)-(e)).…”

Section: Resultsmentioning

confidence: 99%

Investigation of Cr³⁺ doped Zn-Co nanoferrites as potential candidate for self-regulated magnetic hyperthermia applications

Valente-Rodrigues¹,

Caraballo-Vivas²,

Santos³

et al. 2023

Phys. Scr.

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Controlling the Curie temperature (TC) in the range from 42-46 °C in magnetic hyperthermia (MH) therapy is an essential research topic because overheating can cause irreversible damage to healthy tissue. When TC is in the above temperature range, the magnetic nanoparticles reach a paramagnetic state, effectively turning off the MH treatment. In this work, we synthesized Zn-Co nanoparticles of representative composition Zn0.54Co0.46CrxFe2-xO4, where the Fe3+ cations are carefully replaced by Cr3+ ions, which allow a precise tuning of TC and hence the self-regulation of MH. The X-ray diffraction analysis of the prepared nanoparticles confirms the formation of a single-phase cubic spinel structure. The average crystallite of the nanoparticles increases with Cr3+ doping, while the TC and saturation magnetization decrease considerably from 78 °C (x = 1) to 27 °C (x = 0.6) and 46.6 emu/g (x = 1) to 15.3 emu/g (x = 0.6), respectively. Besides MH potential of the investigated samples as revealed from specific absorption rate (SAR) assays and the maximum temperature reach (Tmax), vary from 7 W/g and 37.3 °C, for x = 0.6, to 38 W/g and 62.9 °C, for x = 0.1, we found that the composition Zn0.54Co0.46Cr0.4Fe1.6O4 is more promising with SAR of 22 W/g and Tmax = 42.3 °C, which is precisely lies in the safe temperature range to automatically activate the self-regulation during the magnetic hyperthermia treatment. The results reveal an excellent combination between size distribution and Cr3+ content in Zn-Co-based ferrite, which has a great potential for self-regulated magnetic hyperthermia applications.

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Section: Resultsmentioning

confidence: 99%

Investigation of Cr³⁺ doped Zn-Co nanoferrites as potential candidate for self-regulated magnetic hyperthermia applications

Valente-Rodrigues¹,

Caraballo-Vivas²,

Santos³

et al. 2023

Phys. Scr.

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Effect of temperature on structural and optical properties of green synthesized lanthanum oxide nanoparticles

Krishna¹,

Smitha²,

Nisha³

2020

AIP Conference Proceedings

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Paper-Based Nanoplatforms for Multifunctional Applications

Matias

Nunes

Pimentel

et al. 2019

Journal of Nanomaterials

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In this work, zinc oxide (ZnO) and titanium dioxide (TiO 2 ) nanostructures were grown on different cellulose paper substrates, namely, Whatman, office, and commercial hospital papers, using a hydrothermal method assisted by microwave irradiation. Pure ZnO and TiO 2 nanostructures were synthesized; however, the growth of TiO 2 above ZnO was also investigated to produce a uniform heterostructure. Continuous ZnO nanorod arrays were grown on Whatman and hospital papers; however, on office paper, the formation of nanoplates originating nanoflower structures could be observed. TiO 2 nanoparticles homogeneously covered all the substrates, in some conditions forming uniform TiO 2 films. Structural characterization was carried out by scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), and Raman spectroscopy. The optical characterization of all the materials was carried out. The produced materials were investigated for multifunctional applications, like photocatalyst agents, bacterial inactivators, and ultraviolet (UV) sensors. To evaluate the photocatalytic activity under UV and solar radiations, rhodamine B was the model-test contaminant indicator and the best photocatalytic activity was achieved with Whatman paper. Hospital paper with TiO 2 nanoparticles showed significant antibacterial properties against Staphylococcus aureus. ZnO-based UV sensors demonstrated a responsivity of 0.61 μA W -1 .

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Cation Distribution Study of Chromium Substituted Copper Nickel Zinc Ferrite

Abstract: (x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0

Cited by 3 publications

References 6 publications

Investigation of Cr³⁺ doped Zn-Co nanoferrites as potential candidate for self-regulated magnetic hyperthermia applications

Investigation of Cr³⁺ doped Zn-Co nanoferrites as potential candidate for self-regulated magnetic hyperthermia applications

Effect of temperature on structural and optical properties of green synthesized lanthanum oxide nanoparticles

Paper-Based Nanoplatforms for Multifunctional Applications

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Cation Distribution Study of Chromium Substituted Copper Nickel Zinc Ferrite

Abstract: (x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0

Cited by 3 publications

References 6 publications

Investigation of Cr3+ doped Zn-Co nanoferrites as potential candidate for self-regulated magnetic hyperthermia applications

Investigation of Cr3+ doped Zn-Co nanoferrites as potential candidate for self-regulated magnetic hyperthermia applications

Effect of temperature on structural and optical properties of green synthesized lanthanum oxide nanoparticles

Paper-Based Nanoplatforms for Multifunctional Applications

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Investigation of Cr³⁺ doped Zn-Co nanoferrites as potential candidate for self-regulated magnetic hyperthermia applications

Investigation of Cr³⁺ doped Zn-Co nanoferrites as potential candidate for self-regulated magnetic hyperthermia applications