Influence of La doping and synthesis method on the properties of CoFe2O4 nanocrystals

Mansour, S.F.; Hemeda, O. M.; El-Dek, S.I.; Salem, B. I.

doi:10.1016/j.jmmm.2016.06.082

Cited by 56 publications

(14 citation statements)

References 24 publications

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“…Another plausible reason is that the core spins configuration differs much more than the surface ones (exchange bias) as reported in Table 2. We expected that surface magnetization is larger than bulk one which completely disagrees with the reported literature for nanomaterials (Mansour et al 2016). Figure 4b represents the (M-H) loop for the sample with x = 0.03 as a separate loop.…”

Section: Resultscontrasting

confidence: 63%

Drastic improvement in magnetization of CdO nanoparticles by Fe doping

2017

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Hydrothermal route was used in the preparation of Fe-doped CdO nanoparticles with 3, 5, 7 and 10 wt% and their structural and magnetic properties were investigated. Structural characterization using powder X-ray diffraction confirmed the single phase cubic symmetry of these nanoparticles. Particle size decreased monotonically with increasing the dopant ion concentration. The microstructure of the synthesized samples was studied by a high-resolution transmission electron microscopy (HRTEM) which confirmed the nanocrystalline nature of the samples. A vibrating sample magnetometer provided the hysteresis curves of all samples. Pure CdO reveals ferromagnetic behavior while antiferromagnetization is observed for all Fe-doped samples. Large coercivity as well as large area for the sample x = 0.05 is achieved.

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Section: Resultscontrasting

confidence: 63%

Drastic improvement in magnetization of CdO nanoparticles by Fe doping

2017

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“…With more heating, the viscous liquid swelled and auto-ignited, to harvest voluminous powder. The reaction was very fast and dry very ne brown powder was obtained (Mansour et al 2016).…”

Section: Czfnps and Cfnps Preparationmentioning

confidence: 99%

Evaluation the toxic effects of Cobalt/Zinc/Ferrite nano-complex in experimental mice

El-Nahass

El‐Naggar

Salem

et al. 2021

Preprint

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Currently, nanoparticles (NPs) are in use in several applications especially in the biomedical field. The NPs showed promising results in the treatment of several diseases, however, NP S could have toxic effects on some vital organs. This study was conducted to evaluate the possible toxicity of Cobalt/Ferrite (CF NPs) and Cobalt/Zinc/Ferrite (CZF NPs) nano-complex. Eighty female mice were used to determine the median lethal dose (LD 50 ) of CF NPs (100 mg/kg) and CZF NPs (100 mg/kg). Thirty female mice CD1 were divided into 3 groups (n=10) as follows: Group 1 (Gp1). Mice were injected with 200 µl of sterile saline interperitoneal (i.p.). Gp2 and Gp3 were injected with CF NPs and CFZ NPs for 6 days. Hematological, biochemical, and histopathological parameters were determined at day 14 post injection. The results showed that there was a significant change in the total body weight in CZF NPs injected mice. CF NPs injections did not alter the values of the total red blood cells (RBCs), haemoglobin conc (Hb), hematocrit Hct%, total white blood cells (WBCs) and platelets while CZF NPs injections increased WBCs count and decrease the platelets count. Also, injection of CZF NPs altered the differential leukocyte percentages. There was no significant change in liver and kidney functions in CF NPs injected mice, while CZF NPs exhibited significant increases in liver and kidney bio-markers. The injection of mice with CF NP S didn´t alters the histological architecture of hepatic and renal tissues, while the hepatic and renal structures were disorganized in CZF NPs injected mice. Collectively, the results revealed that CZF NPs showed a degree of toxicity on experimental mice.

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“…In this study, MCNF doped with La 3+ ions were prepared by sol-gel method, and the chemical formula of the sample prepared was Mg 0.2 Co 0.8 Fe 2-x La x O 4 [10,18].…”

Section: Experimental Processmentioning

confidence: 99%

“…Among all kinds of spinel ferrites, cobalt nanoferrites (CNF) have attracted much attention because of their high saturation magnetization, high coercivity and strong anisotropy constant. Doping or substituting cations in the lattice of spinel will change the physical and chemical properties of CNF [8][9][10]. In particular, the study of Mg 2+ -doped CNF shows that the saturation magnetization, magnetostrictive energy and anisotropy constant of CNF are reduced by replacing Co 2+ with Mg 2+ [11].…”

Section: Introductionmentioning

confidence: 99%