Mossbauer research of Fe/Co nanotubes based on track membranes

Kozlovskiy, Artem L.; Zhanbotin, A.; Zdorovets, Maxim V.; Manakova, I. A.; Ozernoy, A. N.; Kiseleva, T. Yu.; Кадыржанов, К. К.; Rusakov, V. S.; Kanyukov, Egor

doi:10.1016/j.nimb.2016.05.026

Cited by 26 publications

(12 citation statements)

References 40 publications

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“…Moreover, the presence of the orthorhombic phase CeFeO 3 may be due to the onset of crystallization of the hematite phase with a high content of cerium in the structure of the crystal lattice, or crystallization and replacement of cerium atoms in the lattice sites by iron heating as a result of thermal heating. The formation of the magnetic phase of hematite in nanoparticles structure at a temperature of 600 °C is consistent with previous experiments and the literature data on the phase transformations of iron-based oxide nanoparticles [41,42,43,44]. Also, at a temperature of 800 °C, the structure of nanoparticles exhibits the presence of two phases of cerium oxide and hematite in a ratio close to 2:1.…”

Section: Resultssupporting

confidence: 90%

“…The Mossbauer spectrometer was calibrated at room temperature using a standard α-Fe absorber. For processing and analyzing the Mossbauer spectra, methods were used to restore the distributions of the hyperfine parameters of the Mossbauer spectrum, taking into account a priori information about the object of study, implemented in the SpectrRelax program [41,42].…”

Section: Methodsmentioning

confidence: 99%

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Synthesis and Properties of Ferrite-Based Nanoparticles

et al. 2019

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The work is dedicated to the study of the structural and optical characteristics, as well as the phase transformations, of ferrite nanoparticles of CeO2-Fe2O3. To characterize the results obtained, the methods of scanning and transmission microscopy, X-ray diffraction (XRD) spectroscopy, and Mössbauer spectroscopy were applied. It was found that the initial nanoparticles are polycrystalline structures based on cerium oxide with the presence of X-ray amorphous inclusions in the structure, which are characteristic of iron oxide. The study determined the dynamics of phase and structural transformations, as well as the appearance of a magnetic texture depending on the annealing temperature. According to the Mossbauer spectroscopy data, it has been established that a rise in the annealing temperature gives rise to an ordering of the magnetic properties and a decrease in the concentration of cationic and vacancy defects in the structure. During the life test of synthesized nanoparticles as cathode materials for lithium-ion batteries, the dependences of the cathode lifetime on the phase composition of nanoparticles were established. It is established that the appearance of a magnetic component in the structure result in a growth in the resource lifetime and the number of operating cycles. The results show the prospects of using these nanoparticles as the basis for lithium-ion batteries, and the simplicity of synthesis and the ability to control phase transformations opens up the possibility of scalable production of these nanoparticles for cathode materials.

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Section: Resultssupporting

confidence: 90%

Section: Methodsmentioning

confidence: 99%

Synthesis and Properties of Ferrite-Based Nanoparticles

et al. 2019

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“…) [3,17]. При измерении намагничен-ности индукционным методом измерительная ячейка пред-ставляет собой две совмещенные катушки, намотанные в противоположных направлениях и несколько разнесенные в пространстве вдоль общей оси.…”

Section: результаты и обсуждениеunclassified

Study of the iron nanoparticles phase transformation during thermal annealing

Kozlovskiy¹,

Kargin²,

Kokarev³

et al. 2017

KazNU Chem Bull

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Change in structural properties and phase composition of nanoparticles based on iron oxide was researched in the paper. As a result of conducted studies it was found that during heat treatment oxide phases of (γ-Fe2O3) and α-Fe2O3 maghemite were formed in oxygen atmosphere. Researches of powder array magnetization were showed that the hysteresis loop movement had the form characteristic for ferromagnetic materials. Additionally, loops obtained at different directions of the magnetic field have different characters, which indicate the magnetic anisotropy presence in the samples.

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“…The fabrication and control of nanoscale structures synthesized from a wide range of materials are crucial in the technological aspects and operation of nanostructured materials. Potential applications of nanostructures range from magnetic recording to bio-magnetism sensors and bases for lithium-ion batteries [4][5][6]. In the modern world, the main direction of the development of lithium-ion battery technology is associated with the achievement of higher energy density, increase in service life, reducing charging time, and increasing safety during operation.…”

Section: Introductionmentioning

confidence: 99%

Study of the Applicability of Fe Nanotubes as an Anode Material of Lithium-Ion Batteries

Kozlovskiy¹,

Здоровец²,

Shumskaya³

et al. 2019

PIER M

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The paper presents the results of the use of iron nanotubes as the anode material of lithiumion batteries. To assess the degradation of the morphology of nanostructures after different numbers of cycles of life tests, the method of scanning electron microscopy, Mossbauer spectroscopy, and X-ray diffraction analysis were applied. It is shown that the decrease in discharge capacity starts at the 380th cycle and is caused by the onset of degradation processes of nanostructures due to the formation of amorphous inclusions and an increase in macrostresses and distortions in the structure. The complete degradation of the structure is observed after the 492nd life cycle test. According to the data obtained by Mossbauer spectroscopy, it has been established that an increase in life cycles leads to an increase in contribution of partial spectrum characteristic of a paramagnetic state. That indicates an increase in degradation rate of nanostructures and an increase in the content of impurity inclusions and amorphous formations in the crystal structure.

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Mossbauer research of Fe/Co nanotubes based on track membranes

Cited by 26 publications

References 40 publications

Synthesis and Properties of Ferrite-Based Nanoparticles

Synthesis and Properties of Ferrite-Based Nanoparticles

Study of the iron nanoparticles phase transformation during thermal annealing

Study of the Applicability of Fe Nanotubes as an Anode Material of Lithium-Ion Batteries

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