Influence of Zn substitution on the structural and magnetic properties of Co1-xZnxFe2O4 nano-ferrites

Nasrin, Shamima; Hoque, S. Manjura; Hossen, M. Moazzam

doi:10.9790/4861-06235865

Cited by 30 publications

(4 citation statements)

References 25 publications

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“…The decrease in the lattice constant is due to the replacement of Zn 2+ with Co 2+ since ionic size of Co 2+ (0.78 Å) is smaller than that of Zn 2+ (0.82 Å) which has been reported earlier [38]. The values of the lattice constant lie in the range of 8.415-8.480 Å (Table I) that are in good agreement with the previously reported values [36].…”

Section: Structural Analysissupporting

confidence: 90%

Microwave absorption properties of CoGd substituted ZnFe2O4 ferrites synthesized by co-precipitation technique

Hussain

Misbah-ul-Islam

Meydan

et al. 2018

Ceramics International

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A series of co-precipitated Zn1-xCoxGdyFe2-yO4 spinel ferrites (x=0.0-0.5, y=0.00-0.10) sintered at 1000 o C were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), vibrating sample magnetometery (VSM) and microwave cavity perturbation (MCP). XRD patterns and FTIR spectra reveal formation of the spinel phase along with few traces of GdFeO3 second phase. The lattice constant decreases with an increasing amount of CoGd ions due to the segregation of Gd 3+ on the grain boundaries and due to replacement of lager Zn 2+ ions with smaller Co 2+ ions. SEM shows grain size to decrease with the increase of CoGd contents due to grain growth inhibition by the second phase. VSM results show remanence and saturation magnetization to exhibit an increasing trend due to Co substitution on octahedral sites and presence of a second phase. The coercivity increases with the increase of CoGd contents due to anisotropic nature of Co. MCP shows the complex magnetic permeability to increase with CoGd concentration while the complex permittivity decreases.

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Section: Structural Analysissupporting

confidence: 90%

Microwave absorption properties of CoGd substituted ZnFe2O4 ferrites synthesized by co-precipitation technique

Hussain

Misbah-ul-Islam

Meydan

et al. 2018

Ceramics International

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“…The crystallite size of MgO NPs decreased with the increasing concentration of Ag dopant. Reduction in crystallite size could be due to the crystallite size influence or surface stress in the crystal structure with the dopant Ag [29]. Such a phenomenon was also reported by other studies [30,31].…”

Section: X-ray Diffraction (Xrd) Analysissupporting

confidence: 74%

Facile Synthesis, Characterization, Photocatalytic Activity, and Cytotoxicity of Ag-Doped MgO Nanoparticles

et al. 2021

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Due to unique physicochemical properties, magnesium oxide nanoparticles (MgO NPs) have shown great potential for various applications, including biomedical and environmental remediation. Moreover, the physiochemical properties of MgO NPs can be tailored by metal ion doping that can be utilized in photocatalytic performance and in the biomedical field. There is limited study on the photocatalytic activity and biocompatibility of silver (Ag)-doped MgO NPs. This study was planned for facile synthesis, characterization, and photocatalytic activity of pure and silver (Ag)-doped MgO NPs. In addition, cytotoxicity of pure and Ag-doped MgO NPs was assessed in human normal umbilical vein endothelial cells (HUVECs). Pure MgO NPs and Ag-doped (1, 2, 5, and 7.5 mol%) MgO NPs were prepared via a simple sol-gel procedure. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FTIR), photoluminescence (PL), and X-ray photoelectron spectroscopy (XPS) were used to characterize the prepared samples. XRD results showed the preparation of highly crystalline NPs with no impurity peaks. TEM and SEM studies indicate smooth surfaces with almost spherical morphology of MgO NPs, and Ag-doping did not change the morphology. Elemental composition study suggested that Ag is uniformly distributed in MgO particles. Intensity of the PL spectra of MgO NPs decreased with increasing the concentration of Ag dopants. In comparison to pure MgO NPs, Ag-MgO NPs showed higher degradation of methylene blue (MB) dye under UV irradiation. The improved photocatalytic activity of Ag-MgO NPs was related to the effect of dopant concentration on reducing the recombination between electrons and holes. Cytotoxicity studies showed good biocompatibility of pure and Ag-doped MgO NPs with human normal umbilical vein endothelial cells (HUVECs). These results highlighted the potential of Ag-doped MgO NPs in environmental remediation.

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“…On the other hand, the X-ray density ( d X-ray ) was calculated, for each sample, using the following equation: 35 where M is the sample's molecular weight, N A = 6.022 × 10 23 mol −1 is Avogadro's number, Z is the number of molecules in a spinel lattice pet unit cell ( Z = 8) and a exp is the lattice parameter.…”

Section: Methodsmentioning

confidence: 99%

Structural, morphological, and electrical properties of silver-substituted ZnAl₂O₄nanoparticles

et al. 2022

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Influence of Zn substitution on the structural and magnetic properties of Co1-xZnxFe2O4 nano-ferrites

Cited by 30 publications

References 25 publications

Microwave absorption properties of CoGd substituted ZnFe2O4 ferrites synthesized by co-precipitation technique

Microwave absorption properties of CoGd substituted ZnFe2O4 ferrites synthesized by co-precipitation technique

Facile Synthesis, Characterization, Photocatalytic Activity, and Cytotoxicity of Ag-Doped MgO Nanoparticles

Structural, morphological, and electrical properties of silver-substituted ZnAl₂O₄nanoparticles

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Influence of Zn substitution on the structural and magnetic properties of Co1-xZnxFe2O4 nano-ferrites

Cited by 30 publications

References 25 publications

Microwave absorption properties of CoGd substituted ZnFe2O4 ferrites synthesized by co-precipitation technique

Microwave absorption properties of CoGd substituted ZnFe2O4 ferrites synthesized by co-precipitation technique

Facile Synthesis, Characterization, Photocatalytic Activity, and Cytotoxicity of Ag-Doped MgO Nanoparticles

Structural, morphological, and electrical properties of silver-substituted ZnAl2O4nanoparticles

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Structural, morphological, and electrical properties of silver-substituted ZnAl₂O₄nanoparticles