Study of phase transformations in Co/CoCo2O4 nanowires

Здоровец, М. В.; Kozlovskiy, Artem L.

doi:10.1016/j.jallcom.2019.152450

Cited by 112 publications

(14 citation statements)

References 70 publications

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“…Highly interdependent transition metal oxides demonstrate a broad range of uncommon phenomena, which can be used for practical applications. [1][2][3] Electrical and magnetic characteristics are result of the collaborative effects of charge and spin ordering. These materials show different quantum effects, for example, Bose-Einstein condensation of magnons, hightemperature superconductivity, and multiferroicity (the coexistence of magnetic and ferroelectric ordering).…”

Section: Introductionmentioning

confidence: 99%

Peculiarities of the microwave properties of hard–soft functional composites SrTb_0.01Tm_0.01Fe_11.98O₁₉–AFe₂O₄ (A = Co, Ni, Zn, Cu, or Mn)

et al. 2020

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Section: Introductionmentioning

confidence: 99%

Peculiarities of the microwave properties of hard–soft functional composites SrTb_0.01Tm_0.01Fe_11.98O₁₉–AFe₂O₄ (A = Co, Ni, Zn, Cu, or Mn)

et al. 2020

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“…One way to increase the stability of a nanostructure is via directed modification in order to reduce the density of point defects in the structure, and the relaxation of nonequilibrium phases. The most common methods of directional modification are thermal annealing of defects in various media, and the use of irradiation of nanostructures with various types of ionizing radiation [5][6][7][8][9][10]. In this case, in the case of thermal annealing, the processes of annihilation of defects as a result of changes in the thermal vibrations of atoms and the subsequent recrystallization of nanostructures, as a rule, at high annealing temperatures lead not only to annealing of defects, but also to processes of phase transformations, which lead not only to a change in the structure, but also in the conductive and magnetic properties of nanomaterials [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Structural Changes and Catalytic Properties of FeNi Nanostructures as a Result of Exposure to Gamma Radiation

et al. 2020

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The paper presents the results of changes in the structural characteristics, and the degree of texturing of FeNi nanostructures close in composition to permalloy compounds as a result of directed modification by gamma radiation with an energy of 1.35 MeV and doses from 100 to 500 kGy. The choices of energy and radiation doses were due to the need to modify the structural properties, which consisted of annealing the point defects that occurred during the synthesis along the entire length of the nanotubes. The initial FeNi nanostructures were polycrystalline nanotubes of anisotropic crystallite orientation, obtained by electrochemical deposition. The study found that exposure to gamma rays led to fewer defects in the structure, and reorientation of crystallites, and at doses above 300 kGy, the presence of one selected texture direction (111) in the structure. During tests of the corrosion resistance of synthesized and modified nanostructures in a PBS solution at various temperatures, it was found that exposure to gamma rays led to a significant decrease in the rate of degradation of nanotubes and an increase in the potential life of up to 20 days. It was established that at the first stage of testing, the degradation of nanostructures is accompanied by the formation of oxide inclusions, which subsequently lead to the formation of pitting corrosion and subsequent partial or complete destruction of the nanostructures. It is shown that gamma radiation is promising not only for targeted modification of nanostructures and increasing resistance to degradation, but also for increasing the rate of catalytic reactions of the PNA-PPD type.

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“…There has been a significant amount of interest for track-etched membrane (TeMs) in MD. A unique feature of TeMs is the control of the number of pores per unit area [20][21][22][23][24][25], which significantly expands fields of application in sensing [26], catalysis [27][28][29][30][31], lithium-ion batteries [32,33], template synthesis of nanostructures [34][35][36][37][38]. At the present time various types of polymers are known, intended as a material for TeMs.…”

Section: Introductionmentioning

confidence: 99%

Phenol solutions treatment by using hydrophobized track-etched membranes

Yeszhanov¹,

Dosmagambetova²

2020

Bull. of the Kar. Univ. "Chem". Ser.

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Phenols are one of the most common surface water pollution. The discharge of phenolic waters into water bodies and streams sharply degrade their general sanitary condition, since these compounds have a toxic effect, and phenols can intensively absorb oxygen dissolved in water, which negatively affects the life of organisms in water bodies. Therefore, water treatment of phenols is an important environmental problem. In this study, the hydrophobic polyethylene terephthalate track-etched membranes (PET TeMs) were tested in water treatment from phenol by direct contact membrane distillation (DCMD). Hydrophobic PET TeMs were obtained by UV-graft polymerization of styrene, triethoxyvinylsilane with the addition of vinylimidazole (VIM), as well as by coating with fluorine-containing silanes. Scanning electron microscopy (SEM), Fourier-transform infrared (FTIR) spectroscopy and liquid entry pressure (LEP) analysis were used for membrane characterization. The contact angle after modification of PET TeMs was reached more than 130°. The efficiency of water purification from phenol was evaluated by water-flux measurements and fluorimetric method. The phenols solution was used at a concentration of 0.5, 1 and 2 g/l. The largest permeate flux of hydrophobized membranes was 1.1 kg/ m2•h.

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Study of phase transformations in Co/CoCo2O4 nanowires

Cited by 112 publications

References 70 publications

Peculiarities of the microwave properties of hard–soft functional composites SrTb_0.01Tm_0.01Fe_11.98O₁₉–AFe₂O₄ (A = Co, Ni, Zn, Cu, or Mn)

Peculiarities of the microwave properties of hard–soft functional composites SrTb_0.01Tm_0.01Fe_11.98O₁₉–AFe₂O₄ (A = Co, Ni, Zn, Cu, or Mn)

Investigation of the Structural Changes and Catalytic Properties of FeNi Nanostructures as a Result of Exposure to Gamma Radiation

Phenol solutions treatment by using hydrophobized track-etched membranes

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Study of phase transformations in Co/CoCo2O4 nanowires

Cited by 112 publications

References 70 publications

Peculiarities of the microwave properties of hard–soft functional composites SrTb0.01Tm0.01Fe11.98O19–AFe2O4 (A = Co, Ni, Zn, Cu, or Mn)

Peculiarities of the microwave properties of hard–soft functional composites SrTb0.01Tm0.01Fe11.98O19–AFe2O4 (A = Co, Ni, Zn, Cu, or Mn)

Investigation of the Structural Changes and Catalytic Properties of FeNi Nanostructures as a Result of Exposure to Gamma Radiation

Phenol solutions treatment by using hydrophobized track-etched membranes

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Product

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Peculiarities of the microwave properties of hard–soft functional composites SrTb_0.01Tm_0.01Fe_11.98O₁₉–AFe₂O₄ (A = Co, Ni, Zn, Cu, or Mn)

Peculiarities of the microwave properties of hard–soft functional composites SrTb_0.01Tm_0.01Fe_11.98O₁₉–AFe₂O₄ (A = Co, Ni, Zn, Cu, or Mn)