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Papers by Olga Vodyankina

Advanced Nanomaterials for Catalysis and Energy

Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials

A new 1:1 cocrystal (L-Asc–Pic) of L-ascorbic acid (vitamin C) with picolinic acid was prepared a... more A new 1:1 cocrystal (L-Asc–Pic) of L-ascorbic acid (vitamin C) with picolinic acid was prepared as a powder and as single crystals. The crystal structure was solved and refined from single-crystal X-ray diffraction (SCXRD) data collected at 293 (2) and 100 (2) K. The samples of the L-Asc–Pic cocrystal were characterized by elemental (HCNS) analysis and titrimetric methods, TG/DTG/DSC, and IR and Raman spectroscopy. The asymmetric unit comprises a picolinic acid zwitterion and an L-ascorbic acid molecule. The stabilization energy of intermolecular interactions involving hydrogen bonds, the vibrational spectrum and the energies of the frontier molecular orbitals were calculated using the GAUSSIAN09 and the CrystalExplorer17 programs. The charge distribution on the atoms of the L-Asc–Pic cocrystal, L-ascorbic acid itself and its 12 known cocrystals (structures from Version 5.40 of the Cambridge Structural Database) were calculated by the methods of Mulliken, Voronoi and Hirshfeld charg...

Materials

Different methods (the wetness impregnation of Ag and Pd precursors dissolved in water or acetoni... more Different methods (the wetness impregnation of Ag and Pd precursors dissolved in water or acetonitrile solution, and the double solvent impregnation technique) were employed to immobilize Ag–Pd nanoparticles (NPs) into the pores of the microporous zirconium-based metal-organic framework known as UiO-66. The obtained materials were characterized by using nitrogen adsorption-desorption at −196 °C, powder X-ray diffraction, UV-Vis diffusion reflectance spectroscopy, and transition electron microscopy measurements. Special attention was paid to the acid and redox properties of the obtained materials, which were studied by using temperature-programmed desorption of ammonia (TPD-NH3) and temperature-programmed reduction (TPR-H2) methods. The use of a drying procedure prior to reduction was found to result in metallic NPs which, most likely, formed on the external surface and were larger than corresponding voids of the metal-organic framework. The formation of Ag–Pd alloy or monometallic A...

Russian Journal of Physical Chemistry A, 1996

Russian Journal of Physical Chemistry A, 2001

Reaction Chemistry and Engineering, 2021

The conversion of bio-renewable raw materials into valuable products (biofuels, bifunctional carb... more The conversion of bio-renewable raw materials into valuable products (biofuels, bifunctional carbonyls/carboxyls) that serve as the basis for biopolymers, has become one of the most important areas in the development of novel hybrid catalysts.

In this work we fragmented of an aqueous suspension of a micron and submicron BSO particles sampl... more In this work we fragmented of an aqueous suspension of a micron and submicron BSO particles sample via laser ablation. Also we carried out a comparative analysis of structure, phase composition, morphology, physicochemical and functional properties of materials before and after fragmentation. The results show that laser fragmentation leads to the formation of a homogeneous phase composition and better integration of bismuth in the bismuth silicate structure, as well as to an increase of photocatalytic properties of BSO during selective excitation in comparison with the initial material.

XV International Conference on Pulsed Lasers and Laser Applications

The morphology and formation of carbon deposition products on a massive silver catalyst in partia... more The morphology and formation of carbon deposition products on a massive silver catalyst in partial oxidation of monoatomic C 2 -C 4 alcohols and ethylene glycol were studied gravimetrically and by scanning electron microscopy. The structure and reactivity of the alcohols were shown to be related to the structure of carbon-containing deposits formed in their oxidation.

The active species formation in unmodified and MgO-modified monolayer V2O5–MoO3/Al2O3 catalysts a... more The active species formation in unmodified and MgO-modified monolayer V2O5–MoO3/Al2O3 catalysts as well as their composition and structure interrelation with catalytic properties towards propane ODH is considered. The samples prepared were characterized by nitrogen adsorption, STA, XRD, UV-vis DR, Raman spectroscopy, and H2-TPR. The supported components in V2O5–MoO3/Al2O3 catalysts are shown to interact with formation of VMoOx species or VOx–MoOx interfaces containing V–O–Mo bonds. The V2O5–MoO3/Al2O3 samples modification by MgO leads to further changes in the composition and structure of active species. The effect of the species composition and structure on their redox potential and sample catalytic properties is discussed.

The scanning electron microscopy and thermographic and elemental analysis methods were used to sh... more The scanning electron microscopy and thermographic and elemental analysis methods were used to show that two different types of carbon deposition products were formed on the surface of copper depending on the content of oxygen in the reaction mixture, namely, graphite-like films and oxycarbonaceous fibers. The interaction of ethylene glycol with the surface of copper catalysts treated in reaction media of various compositions was studied by the method of programmed-temperature reactions. The formation of graphite-like structures was observed on nonoxidized copper surface regions and resulted in blocking surface active centers. Carbon deposition products of the second type, carbonaceous fibers, were formed under the action of oxygen-containing reaction media. Growth of fibers was accompanied by the emergence of high-dispersity copper crystallites, which intensified the synthesis of glyoxal.

Kinetics and Catalysis

The influence of the preparation technique of bismuth silicate-based catalysts on their formation... more The influence of the preparation technique of bismuth silicate-based catalysts on their formation, phase composition, absorption characteristics, and photocatalytic properties is investigated. Samples the with initial ratio of Bi: Si = 2: 1 are prepared via the hydrothermal method with varied temperature conditions in the hydrothermal aging and calcination stages. The synthesized catalysts demonstrate photocatalytic activity in the decomposition of the methanol equilibrium vapor and visible light-induced decolorization of a methylene blue (MB) aqueous solution.

Scientific Bases for the Preparation of Heterogeneous Catalysts - Proceedings of the 10th International Symposium, Louvain-la-Neuve, Belgium, July 11-15, 2010

Solid State Phenomena

In the present work, bismuth-based nanoparticles of various compositions were obtained by pulsed ... more In the present work, bismuth-based nanoparticles of various compositions were obtained by pulsed laser ablation of a metallic bismuth target in water and air using a Q-switch Nd:YAG laser (wavelength of 1064 nm, pulse duration of 7 ns, frequency of 20 Hz, and pulse energy of 160 mJ). Then the samples were annealed in air at temperatures up to 600°C. A comparative analysis of the obtained powders was carried out using methods of X-ray diffraction, transmission electron microscopy, specific surface area measurements, IR-Fourier and UV-Vis Spectroscopy. The photocatalytic activity of the synthesized materials in the process of Rhodamine B decomposition under irradiation of a LED source (375 nm) was also studied.

Ceramics International

Abstract Bismuth silicates are intensively investigated for their applications as condensers, sen... more Abstract Bismuth silicates are intensively investigated for their applications as condensers, sensors, data storage and optical devices, and photocatalysts. An increased interest in bismuth silicates stimulates developing new methods of their preparation. Synthesis of complex compounds in dry solid powder mixtures in the course of mechanical activation with the absence of any solvent and long-time high-temperature treatment is an attractive method in terms of “green” chemistry and time-effective one-stage approaches. In the present study, mechanical treatment of the mixtures of bismuth(III) compounds and silica with different Bi/Si atomic ratio is applied to prepare the Bi2SiO5, Bi4Si3O12, and Bi12SiO20 bismuth silicates. The effect of Bi precursor and milling time on the bismuth silicate formation in the course of mechanical treatment is investigated. The effect of subsequent thermal treatment of the activated mixture on the phase composition of the samples is also considered. The results obtained show the opportunity for the mechanochemical synthesis of γ-Bi12SiO20 and metastable Bi2SiO5 directly in the course of milling of α-Bi2O3 and SiO2·nH2O mixtures at room temperatures. The formation of target Bi4Si3O12 is shown to occur via the solid-phase reactions between Bi2SiO5 formed during the milling and silica unreacted in the course of subsequent thermal treatment at moderate temperature (

Catalysis Today

Abstract The influence of the order of component introduction and Mo/Fe ratio in the silica-suppo... more Abstract The influence of the order of component introduction and Mo/Fe ratio in the silica-supported Mo-Fe-O catalysts on chemical and phase composition, redox and acid properties of the active catalyst surface, and catalytic activity in the selective oxidation of propylene glycol is considered. The catalysts are synthesized by wetness impregnation with a co-presence of the Fe and Mo components in the solution and sequential impregnation with varying the order of component introduction. The samples are characterized by low-temperature adsorption of N2, UV–vis, Raman spectroscopy, TPR-H2, and pulse NH3 adsorption methods. The effect of the preparation method on the phase composition and catalytic properties in selective oxidation of propylene glycol is shown. The catalyst prepared by sequential impregnation technique is more active and selective as compared to the one prepared by co-impregnation technique. The maximal selectivity towards methylglyoxal is achieved over the catalyst 3MoO3/Fe2O3/SiO2 prepared by introduction of the Mo-containing component onto the surface of the FeOx-precovered support. The role of the FeOx species adsorbed on the support surface with the participation of the SiOH groups is connected with the ability to facilitate the formation of highly dispersed Fe2(MoO4)3 and MoOx nanoparticles that are strongly bound with the SiO2 surface.

Kinetics and Catalysis

The physicochemical properties of V2O5/Al2O3 and MgO–V2O5/Al2O3 supported catalysts (Mg : V = 1 :... more The physicochemical properties of V2O5/Al2O3 and MgO–V2O5/Al2O3 supported catalysts (Mg : V = 1 : 1, 2 : 1, and 3 : 2) obtained by consecutive impregnation of the support with solutions of vanadium and magnesium precursors are studied using a complex of mutually complementary methods (XRD, Raman spectroscopy, UV–Vis spectrometry, and TPR-H2). The effect of the formation of surface magnesium vanadates of various composition and structure on the catalytic properties of the supported vanadium oxide catalysts in the oxidative dehydrogenation of propane is studied. The introduction of magnesium in the samples and an increase in its content, accompanied by a change in the structure of the surface vanadium oxide phases from polymeric VO6/VO5 species to surface metavanadate species, magnesium metavanadate, and further to magnesium divanadate, significantly affects their catalytic properties in the reaction of the oxidative dehydrogenation of propane to propylene.

Advanced Nanomaterials for Catalysis and Energy

Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials

A new 1:1 cocrystal (L-Asc–Pic) of L-ascorbic acid (vitamin C) with picolinic acid was prepared a... more A new 1:1 cocrystal (L-Asc–Pic) of L-ascorbic acid (vitamin C) with picolinic acid was prepared as a powder and as single crystals. The crystal structure was solved and refined from single-crystal X-ray diffraction (SCXRD) data collected at 293 (2) and 100 (2) K. The samples of the L-Asc–Pic cocrystal were characterized by elemental (HCNS) analysis and titrimetric methods, TG/DTG/DSC, and IR and Raman spectroscopy. The asymmetric unit comprises a picolinic acid zwitterion and an L-ascorbic acid molecule. The stabilization energy of intermolecular interactions involving hydrogen bonds, the vibrational spectrum and the energies of the frontier molecular orbitals were calculated using the GAUSSIAN09 and the CrystalExplorer17 programs. The charge distribution on the atoms of the L-Asc–Pic cocrystal, L-ascorbic acid itself and its 12 known cocrystals (structures from Version 5.40 of the Cambridge Structural Database) were calculated by the methods of Mulliken, Voronoi and Hirshfeld charg...

Materials

Different methods (the wetness impregnation of Ag and Pd precursors dissolved in water or acetoni... more Different methods (the wetness impregnation of Ag and Pd precursors dissolved in water or acetonitrile solution, and the double solvent impregnation technique) were employed to immobilize Ag–Pd nanoparticles (NPs) into the pores of the microporous zirconium-based metal-organic framework known as UiO-66. The obtained materials were characterized by using nitrogen adsorption-desorption at −196 °C, powder X-ray diffraction, UV-Vis diffusion reflectance spectroscopy, and transition electron microscopy measurements. Special attention was paid to the acid and redox properties of the obtained materials, which were studied by using temperature-programmed desorption of ammonia (TPD-NH3) and temperature-programmed reduction (TPR-H2) methods. The use of a drying procedure prior to reduction was found to result in metallic NPs which, most likely, formed on the external surface and were larger than corresponding voids of the metal-organic framework. The formation of Ag–Pd alloy or monometallic A...

Russian Journal of Physical Chemistry A, 1996

Russian Journal of Physical Chemistry A, 2001

Reaction Chemistry and Engineering, 2021

The conversion of bio-renewable raw materials into valuable products (biofuels, bifunctional carb... more The conversion of bio-renewable raw materials into valuable products (biofuels, bifunctional carbonyls/carboxyls) that serve as the basis for biopolymers, has become one of the most important areas in the development of novel hybrid catalysts.

In this work we fragmented of an aqueous suspension of a micron and submicron BSO particles sampl... more In this work we fragmented of an aqueous suspension of a micron and submicron BSO particles sample via laser ablation. Also we carried out a comparative analysis of structure, phase composition, morphology, physicochemical and functional properties of materials before and after fragmentation. The results show that laser fragmentation leads to the formation of a homogeneous phase composition and better integration of bismuth in the bismuth silicate structure, as well as to an increase of photocatalytic properties of BSO during selective excitation in comparison with the initial material.

XV International Conference on Pulsed Lasers and Laser Applications

The morphology and formation of carbon deposition products on a massive silver catalyst in partia... more The morphology and formation of carbon deposition products on a massive silver catalyst in partial oxidation of monoatomic C 2 -C 4 alcohols and ethylene glycol were studied gravimetrically and by scanning electron microscopy. The structure and reactivity of the alcohols were shown to be related to the structure of carbon-containing deposits formed in their oxidation.

The active species formation in unmodified and MgO-modified monolayer V2O5–MoO3/Al2O3 catalysts a... more The active species formation in unmodified and MgO-modified monolayer V2O5–MoO3/Al2O3 catalysts as well as their composition and structure interrelation with catalytic properties towards propane ODH is considered. The samples prepared were characterized by nitrogen adsorption, STA, XRD, UV-vis DR, Raman spectroscopy, and H2-TPR. The supported components in V2O5–MoO3/Al2O3 catalysts are shown to interact with formation of VMoOx species or VOx–MoOx interfaces containing V–O–Mo bonds. The V2O5–MoO3/Al2O3 samples modification by MgO leads to further changes in the composition and structure of active species. The effect of the species composition and structure on their redox potential and sample catalytic properties is discussed.

The scanning electron microscopy and thermographic and elemental analysis methods were used to sh... more The scanning electron microscopy and thermographic and elemental analysis methods were used to show that two different types of carbon deposition products were formed on the surface of copper depending on the content of oxygen in the reaction mixture, namely, graphite-like films and oxycarbonaceous fibers. The interaction of ethylene glycol with the surface of copper catalysts treated in reaction media of various compositions was studied by the method of programmed-temperature reactions. The formation of graphite-like structures was observed on nonoxidized copper surface regions and resulted in blocking surface active centers. Carbon deposition products of the second type, carbonaceous fibers, were formed under the action of oxygen-containing reaction media. Growth of fibers was accompanied by the emergence of high-dispersity copper crystallites, which intensified the synthesis of glyoxal.

Kinetics and Catalysis

The influence of the preparation technique of bismuth silicate-based catalysts on their formation... more The influence of the preparation technique of bismuth silicate-based catalysts on their formation, phase composition, absorption characteristics, and photocatalytic properties is investigated. Samples the with initial ratio of Bi: Si = 2: 1 are prepared via the hydrothermal method with varied temperature conditions in the hydrothermal aging and calcination stages. The synthesized catalysts demonstrate photocatalytic activity in the decomposition of the methanol equilibrium vapor and visible light-induced decolorization of a methylene blue (MB) aqueous solution.

Scientific Bases for the Preparation of Heterogeneous Catalysts - Proceedings of the 10th International Symposium, Louvain-la-Neuve, Belgium, July 11-15, 2010

Solid State Phenomena

In the present work, bismuth-based nanoparticles of various compositions were obtained by pulsed ... more In the present work, bismuth-based nanoparticles of various compositions were obtained by pulsed laser ablation of a metallic bismuth target in water and air using a Q-switch Nd:YAG laser (wavelength of 1064 nm, pulse duration of 7 ns, frequency of 20 Hz, and pulse energy of 160 mJ). Then the samples were annealed in air at temperatures up to 600°C. A comparative analysis of the obtained powders was carried out using methods of X-ray diffraction, transmission electron microscopy, specific surface area measurements, IR-Fourier and UV-Vis Spectroscopy. The photocatalytic activity of the synthesized materials in the process of Rhodamine B decomposition under irradiation of a LED source (375 nm) was also studied.

Ceramics International

Abstract Bismuth silicates are intensively investigated for their applications as condensers, sen... more Abstract Bismuth silicates are intensively investigated for their applications as condensers, sensors, data storage and optical devices, and photocatalysts. An increased interest in bismuth silicates stimulates developing new methods of their preparation. Synthesis of complex compounds in dry solid powder mixtures in the course of mechanical activation with the absence of any solvent and long-time high-temperature treatment is an attractive method in terms of “green” chemistry and time-effective one-stage approaches. In the present study, mechanical treatment of the mixtures of bismuth(III) compounds and silica with different Bi/Si atomic ratio is applied to prepare the Bi2SiO5, Bi4Si3O12, and Bi12SiO20 bismuth silicates. The effect of Bi precursor and milling time on the bismuth silicate formation in the course of mechanical treatment is investigated. The effect of subsequent thermal treatment of the activated mixture on the phase composition of the samples is also considered. The results obtained show the opportunity for the mechanochemical synthesis of γ-Bi12SiO20 and metastable Bi2SiO5 directly in the course of milling of α-Bi2O3 and SiO2·nH2O mixtures at room temperatures. The formation of target Bi4Si3O12 is shown to occur via the solid-phase reactions between Bi2SiO5 formed during the milling and silica unreacted in the course of subsequent thermal treatment at moderate temperature (

Catalysis Today

Abstract The influence of the order of component introduction and Mo/Fe ratio in the silica-suppo... more Abstract The influence of the order of component introduction and Mo/Fe ratio in the silica-supported Mo-Fe-O catalysts on chemical and phase composition, redox and acid properties of the active catalyst surface, and catalytic activity in the selective oxidation of propylene glycol is considered. The catalysts are synthesized by wetness impregnation with a co-presence of the Fe and Mo components in the solution and sequential impregnation with varying the order of component introduction. The samples are characterized by low-temperature adsorption of N2, UV–vis, Raman spectroscopy, TPR-H2, and pulse NH3 adsorption methods. The effect of the preparation method on the phase composition and catalytic properties in selective oxidation of propylene glycol is shown. The catalyst prepared by sequential impregnation technique is more active and selective as compared to the one prepared by co-impregnation technique. The maximal selectivity towards methylglyoxal is achieved over the catalyst 3MoO3/Fe2O3/SiO2 prepared by introduction of the Mo-containing component onto the surface of the FeOx-precovered support. The role of the FeOx species adsorbed on the support surface with the participation of the SiOH groups is connected with the ability to facilitate the formation of highly dispersed Fe2(MoO4)3 and MoOx nanoparticles that are strongly bound with the SiO2 surface.

Kinetics and Catalysis

The physicochemical properties of V2O5/Al2O3 and MgO–V2O5/Al2O3 supported catalysts (Mg : V = 1 :... more The physicochemical properties of V2O5/Al2O3 and MgO–V2O5/Al2O3 supported catalysts (Mg : V = 1 : 1, 2 : 1, and 3 : 2) obtained by consecutive impregnation of the support with solutions of vanadium and magnesium precursors are studied using a complex of mutually complementary methods (XRD, Raman spectroscopy, UV–Vis spectrometry, and TPR-H2). The effect of the formation of surface magnesium vanadates of various composition and structure on the catalytic properties of the supported vanadium oxide catalysts in the oxidative dehydrogenation of propane is studied. The introduction of magnesium in the samples and an increase in its content, accompanied by a change in the structure of the surface vanadium oxide phases from polymeric VO6/VO5 species to surface metavanadate species, magnesium metavanadate, and further to magnesium divanadate, significantly affects their catalytic properties in the reaction of the oxidative dehydrogenation of propane to propylene.