Publications on the project |
109 Preculiarities os synthesis of nanodisperse barium titanate and investigation of its properties |
Authors: | S. Khalameida | |
Summary: | The interaction between barium oxide and titanium dioxide with different specific surfase and crystalline structure by mechanochemichal, microwave and hydrothermal treatments have been investigated. It has been found by means of XRD, FTIR, ESR and UV-VIS spectroscopy that use of low-temperature modification of TiO2 leads to the formation of barium titanate nanoparticles with high specific surfase and defect structure. | |
Keywords: | Barium titanate, mechanochemichal and microwawe treatment, photocatalytichal destruction of safranin T | |
Edition: | Chemistry, physics and technology of surface, V.1, N 4 | | | 2010,
441-449,Russian |
109 Specific features of the photocatalytic destruction of safranin T on mechanochemically produced barium titanate. |
Authors: | S. V. Khalameida, V. V. Sidorchuk, V. A. Zazhigalov, T. I. Mironyuk | |
Summary: | Possibility of producing powdered barium titanate with increased specifi c surface area and defective
structure by mechanochemical treatment of barium titanyl oxalate and a mixture of barium and titanium oxides
was studied. Samples were examined by means of X-ray phase and differential-thermal analyses, low-temperature
nitrogen adsorption, EPR, and electronic absorption spectroscopy. The photoactivity of the mechanochemically
activated powders in the reaction of Safranine T disintegration in aqueous solutions was analyzed. | |
Keywords: | barium titanyl oxalate, barium titanate, mechanochemichal treatment, photoactivity, safranin T | |
Edition: | Russian Journal of Applied Chemistry, V.83, N 10 | | | 2010,
1660-1664,Russian |
109 Mechanochemical Synthesis of BaTiO3 Using Different Forms of TiO2 |
Authors: | V. V. Sidorchuk, V. A. Zazhigalov, S. V. Khalameida,
K. Wieczorek-Ciurowa | |
Summary: | Reactions between barium oxide and different forms of titanium dioxide during milling in air and
subsequent heat treatment have been studied by Xray diffraction, Raman spectroscopy, and differential
scanning calorimetry. The results indicate that, when the lowtemperature forms of TiO2 are used, milling
produces weakly aggregated barium titanate powders with a large specific surface area. | |
Keywords: | TiO2 modifications,barium titanate powders, mechanochemichal treatment, specific surfase area, Curie temperature | |
Edition: | Inorganic Materials, V.46, N 10 | | | 2010,
1246-1250,Russian |
109 Synthesis, thermoanalytical, and spectroscopical studies of dispersed barium titanate |
Authors: | S. Khalameida , V. Sydorchuk, J. Skubiszewska-Zieba, R. Leboda,
V. Zazhigalov | |
Summary: | Mechanochemical synthesis of
barium titanate from different raw materials was studied.
The prepared nanodispersed powders were investigated by
means of XRD, DTA-TG, DSC, FTIR, Raman, UV–VIS,
ESR spectroscopy, and low-temperature adsorption of
nitrogen. Barium titanate possessing high specific surface
area was produced directly during dry milling from the
mixtures of barium oxides and titanium dioxide low-temperature
forms (amorphous and anatase). | |
Keywords: | Cubic and tetragonal barium titanate,
Mechanochemical synthesis, Phase transitions,
–OH defects | |
Edition: | Journal Thermal Analysis and Calorimetry, V 101, N2 | | | 2010,
779-784,English |
109 Structure and Optical and Dielectric Properties of the Barium Titanate Nanoparticles Obtained by the Mechanochemical Method |
Authors: | B. M. Gorelov, E. V. Kotenok, S. N. Makhno, V. V. Sydorchuk,
S. V. Khalameida, V. A. Zazhigalov | |
Summary: | The parameters of mechanochemical synthesis of barium titanate nanoparticles from barium tit
anyl oxalate and an oxide mixture are optimized. Xray phase analysis, infrared and Raman scattering spec
troscopy, differential scanning calorimetry, and dielectric spectroscopy are applied to demonstrate that the
nanoparticles contain the cubic and tetragonal crystal lattice modifications. The impurity spectra for the par
ticles obtained by the mechanochemical method from different initial substances are identical. The ferroelec
tric phase volume increases as hydroxyl groups are annealed from the crystal lattice and decreases upon
annealing of metal atom vacancies.
| |
Keywords: | | |
Edition: | Technical Physics | | | 2011,
87-94,Russian |
109 Mechanochemical, Microwave, and Ultrasonic Degradation of Safranin in the Presence of Different Forms of Titanium Dioxide |
Authors: | S. Khalameida, V. Sydorchuk, V. Zazhigalov, R. Leboda, J. Skubiszewska-Zięba | |
Summary: | Safranin T degradation in aqueous solutions has been studied as effect of mechanochemical, ultrasonic, and
microwave treatments in the presence of titanium dioxide catalysts with different characteristics. Liquid
phase (safranin solution) has been analyzed before and after catalysis by spectrophotometry. Solid phase
(TiO2 catalysts) has been examined by means of DTA-DTG and XRD analysis, IR-spectroscopy, and massspectrometry.
All the kinds of treatments have been found to result in dye destruction, mechanochemical one
being the most effective. The activity of monophase TiO2 catalyst varies as reciprocal of their specific surface area
whereas that of biphase TiO2
one varies inversely with on the structure of interface contact zone. | |
Keywords: | | |
Edition: | | | | 2011,
235-241,Ukrainian |
109 Mechanochemical Degradation of Safranin T Catalyzed by Oxides |
Authors: | V. V. Sydorchuk, S. V. Khalameida, J. Skubiszewska-Zięba,
R. Leboda, V. A. Zazhigalov | |
Summary: | Mechanochemical treatment of aqueous solutions of Safranin T in the presence of oxides as catalysts
was studied. | |
Keywords: | | |
Edition: | Russian Journal of Applied Chemistry, V.85, N 2 | | | 2012,
198-201,Russian |
109 Study on interaction between lithium compounds and niobium pentaoxide under mechanochemical treatment |
Authors: | V.V. Sydorchuk, S.V. Khalameida, V.A. Zazhigalov | |
Summary: | | |
Keywords: | | |
Edition: | | | | 2012,
53-60,Ukrainian |
109 Photo- and mechanocatalytic degradation of safranin T in presence of dispersed lithium niobate |
Authors: | V.V. Sydorchuk, S.V. Khalameida, J. Skubiszewska-Zięba,
R. Leboda, V.O. Zazhigalov, L.O. Davydenko | |
Summary: | The influence of hydrothermal and microwave treatments on lithium niobates formation from various reaction mixtures has been studied by the help of XRD and DTA-TG analysis, IR- and UV-Vis spectroscopy. The degradation of safranin in aqueous solutions under UV- and visible irradiation and milling has been investigated. High activity of lithium niobates in this process has been found as dependent on the value of specific surface area of catalyst and the presence of structural defects. | |
Keywords: | | |
Edition: | | | | 2012,
265-272,Ukrainian |
109 Preparation and Properties of BaTiO3/Porous Oxide Composites |
Authors: | V. V. Sydorchuk, S. V. Khalameida, V. P. Klimenko, V. A. Mikheev, and V. A. Zazhigalov | |
Summary: | Barium titanate has been synthesized in pores of oxide matrices using barium titanyl oxalate and
barium titanyl peroxide (peroxotitanate) by a sol–gel process and by dispersing the precursors together with
pyrogenic oxides in water. The composites were characterized by Xray diffraction, differential thermal anal
ysis, nitrogen adsorption measurements, transmission electron microscopy, dielectric spectroscopy, and
photocatalytic activity measurements. The results demonstrate that the pore structure of the composites
forms concurrently with their crystal structure. The composite produced using pyrogenic alumina has high
dielectric permittivity. | |
Keywords: | | |
Edition: | Inorganic Materials, V.48, N 9 | | | 2012,
1046-1052,Russian |
109 EFFECT OF MECHANOCHEMICAL TREATMENT ON THE KINETIC PROPERTIES OF V,Mo,Ti-CONTAINING OXIDE SYSTEMS |
Authors: | V. A. Zazhigalov | |
Summary: | A study was carried out on the use of various mechanochemistry procedures, namely, the mechanical
activation of starting components for the traditional synthesis of catalysts, the activation of catalysts prepared
by traditional methods, and the direct mechanochemical synthesis of catalysts from starting components, for
the preparation of highly efficient catalytic compositions for various processes. Results are given for the
mechanochemical treatment of V-P-O, V-Ti-O, Cu-Ce-O, and Ba-Ti-O compositions as well as MoO3. The
prepared samples were studied by XRD, AFM, SEM, TEM, and XPS methods and improvement of the catalytic
properties was found to be related primarily to formation of nanodimensional particles of active components
or nanodimensional crystalline regions of the active phase as a result of mechanochemical treatment. This
method was found to be successful both in the modification of known catalytic compositions and in the
preparation of new catalytic compositions | |
Keywords: | mechanochemistry, catalysis, metal oxides | |
Edition: | Theoretical and Experimental Chemistry, V.49, N3 | | | 2013,
178-186,Russian |
109 Mechanochemical Synthesis and Some Properties of Dispersed Lithium Niobate |
Authors: | S. Khalameida, V. Sydorchuk, R. Leboda, J. Skubiszewska-Zięba,
V. Zazhigalov | |
Summary: | Interactions in the lithium carbonate–niobium pentoxide system upon mechanochemical treatment (MChT) in air and in water are studied. The products are examined using differential thermal and X-ray diffraction analyses; IR, Raman, and electron spectroscopy; nitrogen adsorption; and electron microscopy.
Activation of the reagents and direct mechanochemical synthesis of lithium metaniobate (LMN) were found
to occur at 600–850 and 1000 rpm, respectively. Lithium metaniobate prepared by MChT has high dispersion,
defect structure, and increased photocatalytic activity. | |
Keywords: | Dispersed Lithium Niobate, mechanochemical treatment, defect structure, photocatalytic activity. | |
Edition: | Russian Journal of Inorganic Chemistry, V.59, N5 | | | 2014,
419-423,Russian |
109 Preparation of nano-dispersed lithium niobate by mechanochemical route |
Authors: | S. Khalameida • V. Sydorchuk • R. Leboda •
J. Skubiszewska-Zięba • V. Zazhigalov | |
Summary: | Interaction in the system of lithium carbonate–
niobium pentoxide during mechanochemical treatment in
air and water has been studied. Prepared samples have been
investigated with the help of DTA–TG, XRD, FTIR,
Raman, and UV–Vis spectroscopy, adsorption–desorption
of nitrogen and TEM. Activation of reagents and direct
mechanochemical synthesis are observed at 600–850 and
1,000 rpm, respectively. Lithium metaniobate samples
prepared via milling possess high dispersity, defective
structure, and improved photocatalytic activity, including
under visible illumination.
| |
Keywords: | Lithium metaniobate, Direct
mechanochemical synthesis, Defective structure,
Photocatalytic activity | |
Edition: | Journal Thermal Analysis and Calorimetry, V.115, N1 | | | 2014,
579-586,English |
The events in the framework of the project |
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109 6. Nanochemistry Purpose: Expected results:Other (to increase production, improve working conditions, environmental improvement, energy savings, material savings, reduced equipment wear, increase productivity, improve efficiency of diagnosis and treatment, etc.) Stage 1: Stage 2: Stage 3: Stage 4: Stage 5:
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