Structural, morphological and magnetic characters of PVP coated ZnFe2O4 nanoparticles

Sagayaraj, R.; Aravazhi, S.; Praveen, P.; Chandrasekaran, G.

doi:10.1007/s10854-017-8127-4

Cited by 34 publications

(13 citation statements)

References 13 publications

(16 reference statements)

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“…The physicochemical properties of zinc and cobalt ferrites have been at the forefront of advanced research because of their potential use in medical and industrial applications [17,18,19,20]. The structure of ZnFe 2 O 4 bulk compound is normal spinel ferrite.…”

Section: Introductionmentioning

confidence: 99%

Impact of Co2+ Substitution on Microstructure and Magnetic Properties of CoxZn1-xFe2O4 Nanoparticles

et al. 2019

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In the present work, we synthesized CoxZn1-xFe2O4 spinel ferrite nanoparticles (x= 0, 0.1, 0.2, 0.3 and 0.4) via the precipitation and hydrothermal-joint method. Structural parameters were cross-verified using X-ray powder diffraction (XRPD) and electron microscopy-based techniques. The magnetic parameters were determined by means of vibrating sample magnetometry. The as-synthesized CoxZn1-xFe2O4 nanoparticles exhibit high phase purity with a single-phase cubic spinel-type structure of Zn-ferrite. The microstructural parameters of the samples were estimated by XRD line profile analysis using the Williamson–Hall approach. The calculated grain sizes from XRPD analysis for the synthesized samples ranged from 8.3 to 11.4 nm. The electron microscopy analysis revealed that the constituents of all powder samples are spherical nanoparticles with proportions highly dependent on the Co doping ratio. The CoxZn1-xFe2O4 spinel ferrite system exhibits paramagnetic, superparamagnetic and weak ferromagnetic behavior at room temperature depending on the Co2+ doping ratio, while ferromagnetic ordering with a clear hysteresis loop is observed at low temperatures (5K). We concluded that replacing Zn2+ ions with Co2+ ions changes both the structural and magnetic properties of ZnFe2O4 nanoparticles.

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Section: Introductionmentioning

confidence: 99%

Impact of Co2+ Substitution on Microstructure and Magnetic Properties of CoxZn1-xFe2O4 Nanoparticles

et al. 2019

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“…To legitimize the presence of Co 2+ particles in our tail compound, we think about the effectively detailed FTIR spectrum of pure Fe 3 O 4 [20] for comparison as appeared in Fig. 2.…”

Section: Ftir Analysismentioning

confidence: 99%

“…Figure3a-c shows the morphology of Co x Fe 3-x O 4 (x = 0.03 M) which was observed by a picture of TEM, correspondingly. The particle size is varied from 2 to 50 nm which is evident from our work reported[20] for Fe 3 O 4 nanoparticles. The domain wall morphology has positively oriented domains that grow up, and the negatively oriented ones shrink.…”

mentioning

confidence: 94%

Tuning of ferrites (CoxFe3-xO4) nanoparticles by co-precipitation technique

Sagayaraj¹,

Aravazhi

kumar

et al. 2019

SN Appl. Sci.

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The synthesis of cobalt ferrites (Co x Fe 3-x O 4 ) materials with sympathetic size and tunable magnetic properties is used for the promising industrial and biomedical applications. Such cobalt ferrites nanoparticles have been employed by co-precipitation technique. XRD analysis revealed that the average crystallite size of synthesized powder is 9 nm using (311) peaks, and it has exhibited polycrystalline structure. FTIR spectroscopy showed the formation of ferrite phase with high-and low-frequency bands at 573 cm −1 and 455 cm −1 , respectively. The TEM images exposed that the materials have been well agglomerated along with spherical-shaped nanoparticles. EDX study confirmed the presence Co, O, Fe and C with stoichiometric composition and no more impurity detected in the spectrum. The VSM analysis revealed that the sample exhibits the hard magnetic materials. In addition, the magnetic anisotropy increases (19.05 → 344.84 erg/g) when Co is added with Fe 3 O 4 . EPR spectroscopy confirmed the ferromagnetic behavior of composites.

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“…Journal homepage :https://ejournal2.undip.ac.id/index.php/jpa/index zinc and iron nanoparticle colloids without the use of organic surfactants, so that nanoparticles with high purity are produced [15,16]. However, in those researchs, high energy of laser pulse was used and the liquid used as the medium is pure water.…”

Section: Journal Of Physics and Its Applicationsmentioning

confidence: 99%

Synthesis of Zn-Fe nanoparticles using pulse laser ablation as a contrast agent in magnetic resonance imaging

2019

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Synthesis of zinc oxide nanoparticles, iron oxide nanoparticles and Zn-Fe nanoparticles using pulse laser ablation method has been conducted. Experimentally, a pulse Nd:YAG laser (1064 nm, 7 ns, 35 mJ) was directed and focused on a metal plates of pure Zn and Fe, which are placed in the liquid medium of polyvinyl pyrrolidone (PVP). The PVP functions as a stabilizer agent. The results show that the produced nanoparticles have a spherical shape with an averaged diameter of Zn-Fe nanoparticles of 13 nm. FTIR and XRD test results of Zn-Fe nanoparticles show characteristics of Zn-Fe compounds. The examination of Zn-Fe nanoparticles as MRI contrast agents was carried out by varying the concentration of nanoparticles. Cenh calculation results showed the highest contrast enhancement occurred at a concentration of 1.25 mM with a value of 64.26% for T1 weighted images, and 81.52% for T2 weighted images. The SNR calculation results show the highest value at a concentration of 1.25 mM of 70.52 for T1 weighted images. The highest SNR value in the T2 weighted image at a concentration of 0.156 mM of 165.09.

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Structural, morphological and magnetic characters of PVP coated ZnFe2O4 nanoparticles

Cited by 34 publications

References 13 publications

Impact of Co2+ Substitution on Microstructure and Magnetic Properties of CoxZn1-xFe2O4 Nanoparticles

Impact of Co2+ Substitution on Microstructure and Magnetic Properties of CoxZn1-xFe2O4 Nanoparticles

Tuning of ferrites (CoxFe3-xO4) nanoparticles by co-precipitation technique

Synthesis of Zn-Fe nanoparticles using pulse laser ablation as a contrast agent in magnetic resonance imaging

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