Study of structural features and phase transformations in nanocomposites of Fe2O3@NdFeO3 type

Kozlovskiy, Artem L.; Egizbek, Kamila; Здоровец, М. В.; Abdinov, R.; Kadyrzhanov, K.K.

doi:10.1007/s10854-021-06626-7

Cited by 2 publications

(1 citation statement)

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“…In recent years, much attention has been paid to environmentally friendly methods of producing nanostructured materials and nanoparticles, which have great prospects for use in various fields of technology, including microelectronics, biomedicine, catalytic decomposition of pollutants and dyes [1][2][3]. An important role in such studies is played by spinel structures with a number of unique properties that allow them to be used in a large number of different applications [4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A Study on the Applicability of NiFe2O4 Nanoparticles as the Basis of Catalysts for the Purification of Aqueous Media from Pollutants

et al. 2021

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The aim of this work is to evaluate the application of NiFe2O4 nanoparticles with spinel structures as the basis of catalysts for the purification of aqueous media from pollutants such as manganese and arsenic. The interest in these catalysts is due to their ease of production and high absorption efficiency, which, together with their magnetic properties, allow the use of nanoparticles for a long time. The sol–gel method, followed by thermal annealing of the samples at different temperatures, was proposed as a method for the synthesis of spinel nanoparticles. The choice of the annealing temperature range of 200–1000 °C is caused by the possibility of estimating changes in the structural properties and the degree of nanoparticles crystallinity. During the study of structural changes in nanoparticles depending on the annealing temperature, it was found that in the temperature range of 200–800 °C, there is an ordering of structural parameters, while for samples obtained at annealing temperatures above 800 °C, there is a partial disorder caused by the agglomeration of nanoparticles with a subsequent increase in their size. According to the results of the studies on the purification of aqueous media from pollutants, it was found that the greatest absorption efficiency belongs to nanoparticles annealed at 500–700 °C, with the purification efficiency of 70–85%, depending on the type of pollutant. The results obtained from the use of nanoparticles as catalysts for the purification of aqueous media show great prospects for their further application on an industrial scale.

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Section: Introductionmentioning

confidence: 99%

A Study on the Applicability of NiFe2O4 Nanoparticles as the Basis of Catalysts for the Purification of Aqueous Media from Pollutants

et al. 2021

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INVESTIGATING MAGNETIC, DIELECTRIC, OPTIC AND MORPHOLOGIC PROPERTIES OF NANO-NICKEL OXIDE-DOPED NdFeO₃

ZENKIN,

DURMUS,

DEMIR

2023

Surf. Rev. Lett.

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In this investigation, [Formula: see text]-Fe2O3 was prepared via co-precipitation and nano-NiO and NdFeO3 were synthesized using the sol–gel method. For NdFe[Formula: see text]Ni[Formula: see text]O3 synthesis, Nd2O[Formula: see text]-Fe2O3, and nano-NiO compounds were mixed via the solid state method. The effect of each component and that of nano-NiO on the NdFe[Formula: see text]Ni[Formula: see text]O3 crystal properties was characterized by using X-ray diffraction (XRD), scanning electron microscopy-energy dispersive X-ray (SEM-EDX), ultraviolet-visible (UV–Vis), vibrating sample magnetometer (VSM), impedance and bandgap analyses. The orthorhombic perovskite structure was confirmed by the XRD data. With the doping of nano-NiO, the unit cell volume was found to decrease. The UV–Vis spectroscopy showed that the nano-NiO-doped optical bandgap ([Formula: see text]) had increased. The VSM analysis demonstrated that by doping nano-NiO to weak ferromagnetic NdFeO3, the resulting NdFe[Formula: see text]Ni[Formula: see text]O3 was rendered superparamagnetic. The real and imaginary parts of dielectric permittivity ([Formula: see text] and [Formula: see text]) and the loss tangent (tan[Formula: see text]) characteristic of the compounds were measured at AC-signaled frequencies of 100 Hz–10 MHz and a voltage range of 0–20 V DC. The increase in active charge transmission with the doping of nano-NiO reduced the [Formula: see text] values. In addition, the large differences between the [Formula: see text] values were thought to be caused by the breakdown voltage ([Formula: see text]) effect of the compounds. The [Formula: see text] and tan[Formula: see text] changes revealed the dipole formation of the compounds at different voltages, their relaxation regions and their polarization mechanism type. The dielectric loss behavior of the compounds demonstrated their good dielectric material properties. This study investigated the effect of method difference and doped material particle size on magnetic and dielectric properties.

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Study of structural features and phase transformations in nanocomposites of Fe2O3@NdFeO3 type

Cited by 2 publications

References 38 publications

A Study on the Applicability of NiFe2O4 Nanoparticles as the Basis of Catalysts for the Purification of Aqueous Media from Pollutants

A Study on the Applicability of NiFe2O4 Nanoparticles as the Basis of Catalysts for the Purification of Aqueous Media from Pollutants

INVESTIGATING MAGNETIC, DIELECTRIC, OPTIC AND MORPHOLOGIC PROPERTIES OF NANO-NICKEL OXIDE-DOPED NdFeO₃

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Study of structural features and phase transformations in nanocomposites of Fe2O3@NdFeO3 type

Cited by 2 publications

References 38 publications

A Study on the Applicability of NiFe2O4 Nanoparticles as the Basis of Catalysts for the Purification of Aqueous Media from Pollutants

A Study on the Applicability of NiFe2O4 Nanoparticles as the Basis of Catalysts for the Purification of Aqueous Media from Pollutants

INVESTIGATING MAGNETIC, DIELECTRIC, OPTIC AND MORPHOLOGIC PROPERTIES OF NANO-NICKEL OXIDE-DOPED NdFeO3

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INVESTIGATING MAGNETIC, DIELECTRIC, OPTIC AND MORPHOLOGIC PROPERTIES OF NANO-NICKEL OXIDE-DOPED NdFeO₃