Comparison effects and electron spin resonance studies of α-Fe2O4 spinel type ferrite nanoparticles

Bayrakdar, Harun; Yalçın, Orhan; Cengiz, Uğur; Özüm, Songül; Anigi, E.; Topel, Önder

doi:10.1016/j.saa.2014.04.163

Cited by 12 publications

(5 citation statements)

References 31 publications

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“…Accordingly, the lattice parameters are ( a = 5.85 Å, c = 43.98 Å) and unit cell volume (1303.43 Å 3 ). These values appear to be compatible with the literature. ,− …”

Section: Resultssupporting

confidence: 91%

“…Sodium dodecyl sulfate (SDS), glycine, and urea were dissolved in deionized water. The solution was poured into a container and finally placed carefully in a microwave oven. − For polymer composite production, the process was applied as in references and .…”

Section: Methodsmentioning

confidence: 99%

“…Spinel/Hexagonal ferrites are prepared by the method applied in references − . Sodium dodecyl sulfate (SDS), glycine, and urea were dissolved in deionized water.…”

Section: Methodsmentioning

confidence: 99%

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Microwave-Assisted Hydrothermal Synthesis of Nanosheet Layered Hexagonal Spinel Ferrites for Efficient Electromagnetic Wave Absorbing

Bayrakdar

2024

Langmuir

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“…Accordingly, the lattice parameters are ( a = 5.85 Å, c = 43.98 Å) and unit cell volume (1303.43 Å 3 ). These values appear to be compatible with the literature. ,− …”

Section: Resultssupporting

confidence: 91%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Microwave-Assisted Hydrothermal Synthesis of Nanosheet Layered Hexagonal Spinel Ferrites for Efficient Electromagnetic Wave Absorbing

Bayrakdar

2024

Langmuir

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“…EPR spectroscopy is a very sensitive technique for determining the paramagnetic species, role of magnetic dipolar interactions, anisotropy, and superparamagnetic behavior during nanocrystalline ferrites formation . The broad signal with g ∼ 2.00 belongs to high spin Fe 3+ ions in an octahedral environment. − The appearance of this signal reveals the superparamagnetic behavior of Cu 0.5 Zn 0.5 Fe 2 O 4 hierarchical nano-microspheres. The intensity of the signal varies: DSHMs > YSHMs > SMs.…”

Section: Results and Discussionmentioning

confidence: 99%

Relationships Between Crystal, Internal Microstructures, and Physicochemical Properties of Copper–Zinc–Iron Multinary Spinel Hierarchical Nano-microspheres

Fan

Zeng

et al. 2018

ACS Appl. Mater. Interfaces

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Rational design and fabrication of high quality complex multicomponent spinel ferrite with specific microstructures and solar light harvestings toward CO2 reduction and antibiotic degradation to future energetic and catalytic applications are highly desirable. In this study, novel copper–zinc–iron multinary spinel hierarchical nano-microspheres (MSHMs) with different internal structures (solid nano-microspheres, yolk–shell hollow nano-microspheres, and double-shelled hollow nano-microspheres) have been successfully developed by a facile self-templated solvothermal strategy. The morphology and structure, optical, as well as photoinduced redox reactions including interfacial charge carrier behaviors and the intrinsic relationship of structure–property between intrinsic nano-microstructures and physicochemical performance of copper–zinc–iron ferrite MSHMs composites were systematically investigated with the assistance of various on- and/or off- line physical–chemical means and deeply elucidated in terms of the research outcomes. It is demonstrated that the modification of the interior microstructures can be applied to tune the catalytic properties of multinary spinel by tailoring the temperature programming to fine control the two opposite forces of contraction (Fc) and adhesion (Fa). Among various internal microstructures, the obtained double-shelled copper–zinc–iron MSHMs exhibited the superior catalytic performance toward 8.8 and 38 μmol for H2 and CO productions as well as 80.4% removal of sulfamethoxazole antibiotics. As evidenced from primary characterizations, for example, combined steady-state PL, ns-TAS, and Mössbauer and sequential investigations, the remarkable improvements in the catalytic activity can be primarily attributed to several crucial factors, for example, the more effective e–-h+ spatial separations and interfacial transfers, multiple internal light scattering, higher photonic energy harvesting and effective reactive oxygen species generation with long radical lifetimes. The current research provides new insights into the molecular design of novel copper–zinc–iron multinary spinels and the intrinsic relationship of structure–property between interior structures (e.g., different crystal texture, morphologies structures) and the physicochemical performance of the aforementioned multinary spinels.

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“…Temperature dependence of the Ferromagnetic Resonance Spectra (FMR) provides valuable information on magnetic systems and phase transitions, especially in an assembly of magnetic nanoparticles [7] and a decrease in temperature is accompanied by a shift in the resonance field, an increasingly asymmetric lineshape, and an increased broadening of the resonance lineshape, anisotropy effects, and magnetic moment of Ferromagnetic Resonance (FMR) signals have been obtained for NPs [8]. The FMR of ferrites is important for investigating the magnetic properties at high frequency due to the resonance originates from the interaction between the spin and electromagnetic waves.…”

Section: Introductionmentioning

confidence: 99%

Temperature dependence of the ferromagnetic resonance (FMR) for MnxCo1−xFe2O4 (0 ≤ x ≤ 1) nanoparticles

Sánchez

Briceño

Larionova

et al. 2021

Journal of Materials Research

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Ferromagnetic resonance was used to study the temperature dependence of mixed manganesecobalt ferrite nanoparticles . The hydrothermal method was used to synthesize the Mn x Co 1−x Fe 2 O 4 nanoparticles. The structural characterization was carried out using X-ray diffraction (XRD), Scanning electron microscopy (SEM), and Transmission electron microscopy (TEM ), obtaining a nanoparticles size range between 5-60 nm. Magnetization curves M(H) as a function of the Mn 2+ content at 2.5 and 300 K, and ferromagnetic resonance (FMR) in the temperature range of 80 < T < 700 K were used for the magnetic characterization. The FMR spectra show asymmetric signals characteristic of the strong magnetic anisotropies. The temperature dependence of the resonance field shows three differentiated regions, a low-temperature region in which the resonance is attributed to agglomerates of nanoparticles, an intermediate temperature region where the resonance is characteristic of dispersed magnetic nanoparticles, and a third region over the blocking temperature corresponding to a superparamagnetic behavior of the system. The study of the H R and the peak to peak linewidth as a function of the temperature and Mn 2+ content allows us to accurately elucidate the key characteristics of the deviation from the ideal superparamagnetic behavior observed by magnetic measurements and open up new research possibilities for evaluating interparticle interactions in nanoparticles.

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Comparison effects and electron spin resonance studies of α-Fe2O4 spinel type ferrite nanoparticles

Cited by 12 publications

References 31 publications

Microwave-Assisted Hydrothermal Synthesis of Nanosheet Layered Hexagonal Spinel Ferrites for Efficient Electromagnetic Wave Absorbing

Microwave-Assisted Hydrothermal Synthesis of Nanosheet Layered Hexagonal Spinel Ferrites for Efficient Electromagnetic Wave Absorbing

Relationships Between Crystal, Internal Microstructures, and Physicochemical Properties of Copper–Zinc–Iron Multinary Spinel Hierarchical Nano-microspheres

Temperature dependence of the ferromagnetic resonance (FMR) for MnxCo1−xFe2O4 (0 ≤ x ≤ 1) nanoparticles

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