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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Кенова Т. А., Зосько Н. А., Пятнов, Максим Владимирович, Александровский, Александр Сергеевич, Максимов Н. Г., Жижаев А. М., Таран О. П.
Заглавие : Получение и активация TiO2 фотонно- кристаллических структур для повышения эффективности реакции фотоэлектрохимического разложения воды
Колич.характеристики :12 с
Место публикации : Журн. СФУ. Химия. - 2024. - Т. 17, № 1. - С. 27-38. - ISSN 19982836 (ISSN); J. Sib. Fed. Univ. Chem. - ISSN 23136049 (eISSN)
Примечания : Библиогр.: 25. - Исследование выполнено за счет гранта Российского научного фонда и Красноярского краевого фонда поддержки научной и научно-технической деятельности № 22-22-20078, https://rscf.ru/project/22-22-20078/ с использованием оборудования Красноярского регионального центра коллективного пользования ФИЦ КНЦ СО РАН
Аннотация: Наноструктурированные фотонно-кристаллические пленки TiO2 анодно синтезированы при импульсном и ступенчатом изменениях напряжения. Полученные фотонные структуры активированы методом циклической вольтамперометрии в 0,5M Na2SO4. Фотоэлектрохимическая активность электродов исследована в реакции разложения воды в области длин волн 360–700 нм. Активация приводит к изменению энергии запрещенной зоны, красному сдвигу спектра IPCE и увеличению его значений в исследованном диапазоне длин волн.TiO2 photonic crystal nanostructure films are anodic synthesized with pulsed and stepwise voltage changes. The obtained photonic structures were activated by cyclic voltammetry in 0.5M Na2SO4. The photoelectrochemical activity of the electrodes was studied in the water splitting reaction in the wavelength range 360–700 nm. Activation leads to a change in the band gap energy, a red shift in the IPCE spectrum and an increase in its values in the studied wavelength range.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Ivanova O. S., Lin, Chun-Rong, Edelman I. S., Svetlitsky E. S., Sokolov A. Е., Zharkov S. M., Sukhachev A. L., Vorobyev S. A., Petrov D. A., Lin, En-Szu
Заглавие : Adsorption properties and catalytic activity of Fe3O4-Ag nanostructures
Колич.характеристики :12 с
Место публикации : Appl. Surf. Sci. - 2024. - Vol. 665. - Ст.160236. - ISSN 01694332 (ISSN), DOI 10.1016/j.apsusc.2024.160236. - ISSN 18735584 (eISSN)
Примечания : Cited References: 48. - The work is supported by the Russian Science Foundation (project no. 23-22-10025, https://rscf.ru/project/ 23-22-10025/) and by the Krasnoyarsk Regional Fund of Science and Technology Support. The electron microscopy and EDS investigations were conducted in the SFU Joint Scientific Center. Magnetic investigations were carried out in the Krasnoyarsk Regional Center of Research Equipment of Federal Research Center "Krasnoyarsk Science Center SB RAS"
Аннотация: The morphology and magnetic properties as well as adsorption capacity and catalytic activity of Fe3O4-Ag nanoparticles synthesized by the solvothermal method were studied in dependence on the duration of the thermolysis process (3, 6, and 8 h). X-ray diffraction, transmission electron microscopy, and energy-dispersive spectroscopy measurements showed that the morphology of nanoparticles changed strongly as the duration of thermolysis increased. At 6 and 8 h duration, Fe3O4 nanocrystals grow and assemble into porous spherical globules with an Ag core (samples 2 and 3). These samples demonstrate high magnetization value and very low coercivity. The adsorption capacity of nanoparticles was studied with respect to two organic dyes: cationic methylene blue (MB) and anionic Congo red (CR). The particles showed preferential adsorption of the cationic dye. High catalytic activity towards four dyes: MB, methyl orange (MO), CR, and Rhodamine C (RhC) at the presence of NaBH4 is the remarkable property of these samples. The rate constant of the catalytic reaction was 1.4 min−1. Simultaneous exposure of CR and MO dyes to nanoparticles and NaBH4 caused their irreversible 100 % degradation while in the case of MB and RhC, a transition to their leuco form occurred.
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Вид документа : Статья из журнала
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Автор(ы) : Shishatskaya, Ekaterina I., Zhila, Natalia O., Dudaev, Alexey E., Nemtsev I. V., Lukyanenko A. V., Volova, Tatiana G.
Заглавие : Modification of polyhydroxyalkanoates polymer films surface of various compositions by laser processing
Место публикации : Polymers. - 2023. - Vol. 15, Is. 3. - Ст.531. - ISSN 20734360 (eISSN), DOI 10.3390/polym15030531
Примечания : Cited References: 91. - The study was funded by the State Assignment of the Ministry of Science and Higher Education of the Russian Federation (Project No. 0287-2021-0025)
Аннотация: The results of surface modification of solvent casting films made from polyhydroxyalkanoates (PHAs) of various compositions are presented: homopolymer poly-3-hydroxybutyrate P(3HB) and copolymers comprising various combinations of 3-hydroxybutyrate (3HB), 3-hydroxyvalerate (3HV), 4-hydroxybutyrate(4HB), and 3-hydroxyhexanoate (3HHx) monomers treated with a CO2 laser in continuous and quasi-pulsed radiation modes. The effects of PHAs film surface modification, depending on the composition and ratio of monomers according to the results of the study of SEM and AFM, contact angles of wetting with water, adhesion and growth of fibroblasts have been revealed for the laser radiation regime used. Under continuous irradiation with vector lines, melted regions in the form of grooves are formed on the surface of the films, in which most of the samples have increased values of the contact angle and a decrease in roughness. The quasi-pulse mode by the raster method causes the formation of holes without pronounced melted zones, the total area of which is lower by 20% compared to the area of melted grooves. The number of viable fibroblasts NIH 3T3 on the films after the quasi-pulse mode is 1.5–2.0 times higher compared to the continuous mode, and depends to a greater extent on the laser treatment mode than on the PHAs’ composition. The use of various modes of laser modification on the surface of PHAs with different compositions makes it possible to influence the morphology and properties of polymer films in a targeted manner. The results that have been obtained contribute to solving the critical issue of functional biodegradable polymeric materials.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Каравайский, Андрей Юрьевич, Лукин, Юрий Иванович, Погорельцев, Евгений Ильич
Заглавие : Диэлектрический метод измерения содержания незамерзшей воды в минеральной почве
Место публикации : Криосфера Земли. - 2023. - Т. 27, № 1. - С. 23-34. - ISSN 15607496 (ISSN), DOI 10.15372/KZ20230103; Earth’s Cryosphere. - ISSN 25419994 (ISSN eng. vers.)
Примечания : Библиогр.: 41
Аннотация: Путем совместных измерений содержания незамерзшей воды в мерзлой естественной минеральной почве диэлектрическим, калориметрическим и контактным методами подтверждена возможность практического применения диэлектрического метода для измерения содержания незамерзшей воды. Количество незамерзшей воды в калориметрическом и контактном методах оценивалось путем измерения влажности образцов за счет содержания незамерзшей воды, в диэлектрическом методе - путем измерения максимального содержания связанной воды. Определено, что значения влажности за счет содержания незамерзшей воды, измеренные с помощью калориметрического метода для образцов одного типа почвы с разной первоначальной влажностью, различаются в пределах 17 %. Значения влажности за счет содержания незамерзшей воды, найденные контактным методом, и значения содержания связанной воды в мерзлой почве, найденные диэлектрическим методом, лежат в диапазоне значений, измеренных с помощью калориметрического метода. Значения содержания связанной воды, найденные диэлектрическим методом, и значения влажности за счет содержания незамерзшей воды, полученные контактным методом, различаются не более чем на 17 %.The possibility of using the dielectric method to determine the unfrozen water content in the frozen natural mineral soil was proved by establishing the relationship between the contents of soil water forms measured by the dielectric, calorimetric, and contact methods. The unfrozen water content in the sample was measured by the calorimetric and contact methods. In the dielectric method, it was estimated by measuring the maximum content of bound water. The unfrozen water content measured by the calorimetric method in the soil samples with different initial water contents varied within 17 %. The unfrozen water content measured by the contact method and the bound water content determined by the dielectric method were within the ranges of values determined by the calorimetric method. The values of the bound water content obtained by the dielectric method and the unfrozen water content obtained by the contact method differed by no more than 17 %.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sukhanova, Ekaterina V., Sagatov, Nursultan E., Oreshonkov A. S., Gavryushkin, Pavel N., Popov, Zakhar I.
Заглавие : Halogen-doped Chevrel phase Janus monolayers for photocatalytic water splitting
Место публикации : Nanomaterials. - 2023. - Vol. 13, Is. 2. - Ст.368. - ISSN 20794991 (eISSN), DOI 10.3390/nano13020368
Примечания : Cited References: 85. - The authors acknowledge financial support from the Russian Science Foundation (no. 21-73-20183)
Аннотация: Chevrel non-van der Waals crystals are promising candidates for the fabrication of novel 2D materials due to their versatile crystal structure formed by covalently bonded (Mo6X8) clusters (X–chalcogen atom). Here, we present a comprehensive theoretical study of the stability and properties of Mo-based Janus 2D structures with Chevrel structures consisting of chalcogen and halogen atoms via density functional theory calculations. Based on the analysis performed, we determined that the S2Mo3I2 monolayer is the most promising structure for overall photocatalytic water-splitting application due to its appropriate band alignment and its ability to absorb visible light. The modulated Raman spectra for the representative structures can serve as a blueprint for future experimental verification of the proposed structures.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Sukhanova E.V., Sagatov N., Oreshonkov A. S., Gavryushkin P.N., Popov Z.I.
Заглавие : Novel Janus 2D structures of XMoY (X, Y = O, S, Se, Te) composition for solar hydrogen production
Место публикации : Int. J. Hydrog. Energy. - 2023. - Vol. 48, Is. 38. - P.14226-14237. - ISSN 03603199 (ISSN), DOI 10.1016/j.ijhydene.2022.12.286. - ISSN 18793487 (eISSN)
Примечания : Cited References: 97. - The authors acknowledge financial support from Russian Science Foundation (№ 21-73-20183). The authors are grateful to the Joint Supercomputer Center of the Russian Academy of Sciences and to the Information Technology Centre of Novosibirsk State University for providing access to the cluster computational resources
Аннотация: The successful fabrication of H-phase Janus transition metal dichalcogenides (TMDs) has received considerable interest due to its great potential in photocatalytic applications. Here, new A′-XMoY (X/Y = O, S, Se, Te) Janus-type structures belonging to the family of TMDs were theoretically investigated for the first time in terms of photocatalytic water splitting via DFT calculations. For all compounds, the Raman spectra were calculated. The SMoO, SeMoO, SMoSe, SMoTe and SeMoTe compounds are dynamically stable and are semiconductors. Among all considered structures SMoTe is the most promising candidate for solar hydrogen production because valence and conduction bands perfectly engulf the redox potentials of water at both neutral and acidic media, opposite to SMoSe, SMoO, SeMoO suitable only in the acidic media, and SeMoTe – in the neutral media. Moreover, A′-SMoTe demonstrates the outstanding values of the solar-to-hydrogen (STH) conversion efficiencies of 54.0 and 67.1 for neutral and acidic media.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Каравайский, Андрей Юрьевич, Лукин, Юрий Иванович
Заглавие : Влияние диэлектрических релаксаций почвенной воды на температурную зависимость диэлектрической проницаемости почвы
Место публикации : Журн. радиоэлектрон. - 2023. - № 1. - Ст.4. - ISSN 16841719 (eISSN), DOI 10.30898/1684-1719.2023.1.4; J. Radio Electron.
Примечания : Библиогр.: 23. - Работа выполнена при финансовой поддержке Российского научного фонда и Красноярского краевого фонда поддержки научной и научно-технической деятельности в рамках научного проекта № 22-27-20112
Аннотация: С помощью обобщенной рефракционной диэлектрической модели смеси изучено влияние спектров относительной диэлектрической проницаемости связанной и несвязанной воды в минеральной почве на характер температурной зависимости относительной диэлектрической проницаемости естественной минеральной почвы, с содержанием глинистой фракции 41,3 %, в диапазоне частот электромагнитного поля от 50 МГц до 15 ГГц. Изучены причины появления пересечений спектров относительной диэлектрической проницаемости минеральной почвы, полученных при различных температурах, но для образца одной влажности. Доказано, что появление такой точки пересечения в диапазоне частот до 1,5 ГГц связано с эффектом Максвелла-Вагнера в связанной воде. Изучены зависимости частоты точки пересечения спектров относительной диэлектрической проницаемости минеральной почвы от температуры и объемного содержания связанной и несвязанной воды.The influence of the dielectric constant spectra of bound and unbound water in mineral soil on the temperature dependences of the dielectric constant of mineral soil in the electromagnetic field frequency range from 50 MHz to 15 GHz was studied. The reasons for the appearance of the crossover frequency of the dielectric constant of mineral soil, obtained at different temperatures, but for a sample of the same moisture, were studied. It was proved that the appearance of crossover points in the frequency range up to 1.5 GHz is related to the Maxwell-Wagner effect in bound water. The dependences of the value of the crossover frequency of the dielectric constant of mineral soil on temperature and the volume content of bound and unbound water were studied.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Morozov E. V., Il’ichev A. V., Bouznik V. M.
Заглавие : Magnetic resonance imaging study of water absorption of polymer composite materials subjected to mechanical and temperature impact
Колич.характеристики :9 с
Место публикации : Russ. J. Phys. Chem. B. - 2023. - Vol. 17, Is. 6. - P.1361-1369. - ISSN 19907931 (ISSN), DOI 10.1134/S1990793123060064. - ISSN 19907923 (eISSN)
Примечания : Cited References: 18. - The research was carried out as part of a state assignment of the Institute of Chemistry and Chemical Technology of the Siberian Branch of the Russian Academy of Sciences (project no. 0287-2021-0012) using the equipment of the Krasnoyarsk Regional Center for Collective Use of the Federal Research Center "Krasnoyarsk Science Center of the Siberian Branch of the Russian Academy of Sciences"
Аннотация: The results of a study of water absorption processes by samples of polymer composite materials (PCMs) based on fiberglass, subjected to low-speed impact with controlled impact energy and alternating temperature cycling are presented. Using magnetic resonance imaging (MRI), the distribution of absorbed water in the fiberglass structure is visualized and the dynamics of its accumulation in various areas of the sample are studied. It is found that mechanical impact leads to a nonuniform distribution of the absorbed water in the samples and a significant accumulation of free water in the areas of destruction and adjacent layers in the event of a violation of the integrity of the outer layer of the material. It is shown that cyclic alternating temperature effects do not lead to a noticeable change in the water absorption processes and are comparable in effect to mechanical nondestructive impacts. The results obtained using MRI are in close agreement with the data of traditional weight measurements, which shows the effectiveness of the method in diagnosing defects and mechanical damage to PCMs exposed to the humid environment.
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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Karavayskiy A. Yu., Lukin Y. I.
Заглавие : Influence of dielectric relaxations of soil water on the temperature dependence of soil permittivity
Колич.характеристики :10 с
Место публикации : Opt. Spectrosc. - 2023. - Vol. 131, Is. 12. - P.1190-1199. - ISSN 0030400X (ISSN), DOI 10.1134/S0030400X24700206. - ISSN 15626911 (eISSN)
Примечания : Cited References: 23. - This work was supported by the Russian Science Foundation and the Krasnoyarsk Regional Fund of Science and Technology Support within the framework of scientific project no. 22-27-20112
Аннотация: Using a generalized refractive mixture dielectric model, the influence of the relative permittivity spectra of bound and unbound water in mineral soil on the nature of the temperature dependence of the relative permittivity of natural mineral soil, with a clay fraction content of 41.3%, was studied in the electromagnetic field frequency range from 50 MHz to 15 GHz. The causes of the emergence of intersections in the relative permittivity spectra of mineral soil, obtained at different temperatures but for a sample of the same moisture content, have been studied. It has been proved that the emergence of such an intersection point in the frequency range up to 1.5 GHz is due to the Maxwell–Wagner effect in bound water. The dependences of the frequency of the intersection point of the relative permittivity spectra of mineral soil on the temperature and volumetric content of bound and unbound water have been studied.
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10.

Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Karavayskiy A. Yu., Lukin Y. I.
Заглавие : The effect of clay content on the spectra of permetivity of mineral soils at positive temperatures
Колич.характеристики :4 с
Коллективы : Radiation and Scattering of Electromagnetic Waves 2023
Место публикации : Conf. Proc. - Radiat. Scatt. Electromagn. Waves, RSEMW. - 2023. - P.456-459. - , DOI 10.1109/RSEMW58451.2023.10201998
Примечания : Cited References: 17. - The work was financially supported by the Russian Science Foundation and the Krasnoyarsk Regional Fund for Support of Scientific and Scientific and Technical Activities within the framework of the scientific project No. 22-27-20112
Аннотация: In this research, it was studied the crossover frequencies of the spectra of the real part of the permittivity of moist mineral soils with different clay content from 10 to 64% in the frequency range from 15 MHz to 15 GHz and in the temperature range from 25 to 0 °C. Based on the experimental dependences obtained, empirical models were proposed for the average crossover frequency of the soil of the real part of the permittivity spectra in the range of changes of these frequencies values with temperature changes, as well as for the half-widths of the ranges of changes.
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11.

Вид документа : Статья из сборника (выпуск продолж. издания)
Шифр издания :
Автор(ы) : Muzalevskiy K. V., Fomin S. V., Mikhaylov M. I.
Заглавие : UWB reflectometric method for the measuring of vegetation biometric parameters and soil moisture
Коллективы : IEEE Ural-Siberian Conference on Biomedical Engineering, Radioelectronics and Information Technology
Место публикации : IEEE Ural-Siberian Conference on Biomedical Engineering, Radioelectronics and Information Technology (USBEREIT). - 2023. - P.166-169. - , DOI 10.1109/USBEREIT58508.2023.10158880
Примечания : Cited References: 17. - The investigation supported by the Russian Science Foundation and the Krasnoyarsk Regional Science Foundation, project № 22-17-20042
Аннотация: In this article, a method for the simultaneous measurement of total biomass, vegetation water content, and soil moisture is developed based on ultra-wideband (UWB) nadir observation of the reflection coefficient in the frequency range from 450 MHz to 6 GHz. The proposed method is based on a simple model of plane wave reflection from a vegetation layer with flat boundaries lying on a smooth soil surface. The model does not take into account the phenomena of wave scattering on the vegetation elements and the soil surface roughness. The dielectric constant of the vegetation canopy and soil were calculated based on Ulaby and Mironov dielectric models, respectively. The proposed method was tested using data from PORTOS-93 (INRA) experiments on measuring: total biomass (up to 3.3 kg/m2), water content (43%-89%), height (up to 1m) and volumetric content (up to 0.6-0.8%) of wheat plants, moisture (from 5% to 36%), density and clay fraction content (27%) of the soil. As a result, it was shown, the coefficient of determination (R2) and root-mean-square error (RMSE) appeared to be equal to R2=0.999 and RMSE=2.2% when comparing the original and retrieved values of volumetric soil moisture. The retrieved values of total biomass (vegetation water content) with the coefficient of determination R2=0.999 (0.998) and RMSE=16g/m2 (0.7%) coincide with the original set values. Therewith, the bands from 4 GHz to 6 GHz and from 450 MHz to 1 GHz were used to retrieve the canopy biometric parameters and soil moisture, respectively.
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12.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Zos’ko, Nikolay A., Aleksandrovsky A. S., Kenova, Tatyana, Gerasimova, Marina A., Maksimov, Nikolay G., Taran, Oxana P.
Заглавие : Cyclic voltammetry as an activation method of TiO2 nanotube arrays for improvement of photoelectrochemical water splitting performance
Колич.характеристики :11 с
Место публикации : ChemPhotoChem. - 2023. - Vol. 7, Is. 9. - Ст.e202300100. - ISSN 23670932 (eISSN), DOI 10.1002/cptc.202300100
Примечания : Cited References: 36. - The authors express their gratitude to A. M. Zhizhaev for the microscopy and XRD analysis and V. F. Shabanov for the fruitful discussionThis work was conducted within the framework of the budget project FWES-2021-0023 for Institute of Chemistry and Chemical Technology SB RAS using the equipment of Krasnoyarsk Regional Research Equipment Centre of SB RAS
Аннотация: A facile and eco-friendly method for activating anodic TiO2 nanotubes (TNTs) by cyclic voltammetry (CV) is proposed, and photoelectrochemical properties of CV-activated TNTs are compared with those of non-activated TNTs and of TNTs activated by hydrogen-thermal reduction. EPR and luminescence studies show that the pristine samples demonstrate rather large content of paramagnetic and luminescing defects, while hydrogenation and CV-activation lead to the different type of rearrangement of defects. TNTs activated by CV-Na2SO4 demonstrate significantly improved photocurrent density (2.25 mA cm-2) in comparison with that of the hydrogen treated and pristine ones (0.93 mA cm-2 and 0.31 mA cm-2) under NUV-irradiation at 0.2 V (RHE). Enhanced photoactivity of Na2SO4-activated TNTs correlates with higher luminescence quantum yield, lowest paramagnetic defects content and larger decay time of the luminescence. Thus, a decrease in the content of defects is an important factor that reduces the non-radiative recombination of charge carriers. The activation-induced redistribution of surface and bulk defects in nanotubes explains the increased photoelectrochemical activity of TiO2-based anodes. Cyclic voltammetry has been proved to be a reliable method to increase the efficiency of TNTs in PEC water splitting.
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13.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Su B., Jin J., Peng Y., Molokeev M. S., Yang X., Xia Z.
Заглавие : Zero-Dimensional Organic Copper(I) Iodide Hybrid with High Anti-Water Stability for Blue-Light-Excitable Solid-State Lighting
Место публикации : Adv. Opt. Mater. - 2022. - Vol. 10, Is. 12. - Ст.2102619. - ISSN 21951071 (ISSN), DOI 10.1002/adom.202102619
Примечания : Cited References: 55. - This work was supported by the National Natural Science Foundation of China (Nos.: 51961145101 and 51972118), Guangzhou Science & Technology Project (202007020005), and the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program(2017BT01×137). This work was also funded by RFBR according to the research Project No.19-52-80003
Аннотация: The discovery of rare-earth free luminescent materials with blue-light-excitable characteristic is of great importance for solid-sate lighting applications. Herein, a Cu(I)-based 0D luminescent hybrid (1,3-dppH2)2Cu4I8∙H2O is synthesized by a facile solution method, and it shows the orange-red emission peaking at 625 nm upon 460 nm excitation. The structure-related luminescence mechanism has been elaborated by experimental and theoretical investigations. Moreover, the emission intensity remains unchanged even after continuous water treatment for 60 days due to the improved structural stability originating from intermolecular π–π interaction between organic cations. A warm white light-emitting diode (LED) device with the color rendering index of 91.4% has been fabricated by combining the 440 nm LED chip, green-emitting Lu3Al5O12:Ce3+, and (1,3-dppH2)2Cu4I8∙H2O. This work provides a new design route towards 0D cuprous halide materials and will initiate more exploration of their intrinsic luminescence mechanism.
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14.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Pyatnov M. V., Bikbaev R. G., Timofeev I. V., Ryzhkov I. I., Vetrov S. Ya., Shabanov V. F.
Заглавие : Broadband Tamm plasmons in chirped photonic crystals for light-induced water splitting
Место публикации : Nanomaterials. - 2022. - Vol. 12, Is. 6. - Ст.928. - ISSN 20794991 (ISSN), DOI 10.3390/nano12060928
Примечания : Cited References: 41
Аннотация: An electrode of a light-induced cell for water splitting based on a broadband Tamm plasmon polariton localized at the interface between a thin TiN layer and a chirped photonic crystal has been developed. To facilitate the injection of hot electrons from the metal layer by decreasing the Schottky barrier, a thin n-Si film is embedded between the metal layer and multilayer mirror. The chipping of a multilayer mirror provides a large band gap and, as a result, leads to an increase in the integral absorption from 52 to 60 percent in the wavelength range from 700 to 1400 nm. It was shown that the photoresponsivity of the device is 32.1 mA/W, and solar to hydrogen efficiency is 3.95%.
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15.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Morozov E. V., Voronin A. S., Kniga, S., V, Buznik V. M.
Заглавие : Nuclear magnetic resonance study of ice-based composite materials reinforced with nanodisperse aluminum oxide fibers
Коллективы : Institute of Chemistry and Chemical Technology (Siberian Branch, Russian Academy of Sciences) [0287-2021-0012]; Russian Science FoundationRussian Science Foundation (RSF) [18-1300392]
Место публикации : Inorg. Mater. Appl. Res. - 2022. - Vol. 13, Is. 1. - P.217-224. - ISSN 2075-1133, DOI 10.1134/S2075113322010270. - ISSN 2075-115X(eISSN)
Примечания : Cited References: 21. - This work was performed within the scope of state contract no. 0287-2021-0012 of the Institute of Chemistry and Chemical Technology (Siberian Branch, Russian Academy of Sciences) in the part of developing the MRI methods for studying composite materials; also the work was supported by the Russian Science Foundation (project no. 18-1300392) in the part of the study of the processes of water crystallization and ice melting in ice-based composite materials
Предметные рубрики: SELF-DIFFUSION
WATER
Аннотация: Pulsed-field gradient NMR spectroscopy and magnetic resonance imaging methods were used to investigate water suspensions of nanosized fibers of aluminum oxide and ice composite materials based on these fibers. Introduction of the nanofibers was shown to have no noticeable structural effect in the suspensions in the Al2O3 concentration range of 1-10 wt %. High content of the filler was found to change the morphology and texture of the ice matrix in the composites remarkably: it becomes more homogeneous and acquires a higher degree of continuity; the melting front does not visualize internal melting zones or integrity defects in the composite. At the same time, addition of the nanofibers to the ice composites weakly influences the quantitative dynamics of the heat transfer, which is manifested in close values of the propagation speeds of the freezing/melting front in the samples at similar temperatures.
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16.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Пятнов, Максим Владимирович, Тимофеев, Иван Владимирович
Заглавие : Фотоэлектрохимическое расщепление воды наноструктурированным электродом и зеленая водородная энергетика
Место публикации : Фотоника. - 2022. - Т. 16, Вып. 2. - С. 116-125. - ISSN 1993-7296 (ISSN), DOI 10.22184/1993-7296.FRos.2022.16.2.116.125; Photonics Rus. - ISSN 2686-844X (eISSN)
Примечания : Библиогр.: 28. - Исследование выполнено за счет гранта Российского научного фонда и Красноярского краевого фонда поддержки научной и научно-технической деятельности № 22-22-20078, https://rscf.ru/project/22-22-20078
Аннотация: В статье описан перспективный способ получения водорода – фотоэлектрохимическое расщепление воды. Этот подход сочетает непосредственное использование солнечной энергии и низкую стоимость производства фотоэлектрохимических ячеек из широко распространенных на Земле полупроводниковых материалов. Последние достижения в конструировании таких ячеек включают наноструктурирование полупроводниковых электродов плазмонными материалами.This article describes a promising hydrogen formation method, namely the photoelectrochemical water splitting. This approach combines the direct use of solar energy and low production cost of photoelectrochemical cells using the widely used semiconductor materials. The latest advances in such cell design include nanostructuring of the semiconductor electrodes with plasmonic materials.
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17.

Вид документа : Статья из сборника (однотомник)
Шифр издания :
Автор(ы) : Федорова, Екатерина Георгиевна, Смолин, Сергей Григорьевич, Машанов, Александр Иннокентьевич, Чурилов, Григорий Николаевич, Внукова, Наталья Григорьевна
Заглавие : Влияние водорастворимого фуллерена на процесс спиртового брожения в производстве спирта
Коллективы : "Парадигма устойчивого развития агропромышленного комплекса в условиях современных реалий", международная научно-практическая конференция
Место публикации : Парадигма устойчивого развития агропромышленного комплекса в условиях современных реалий: материалы международной научно-практической конференции, посвященной 70-летию Красноярского государственного аграрного университета. - Красноярск: КрасГАУ, 2022. - С. 382-384
Аннотация: В статье описываются результаты исследования влияния водорастворимого фуллерена С60(ОН)20-24 на процесс спиртового брожения в производстве спирта. Описана технология производства бражки с использованием водорастворимого фуллерена. Исследовано содержание углеводов, спирта и сухого остатка биомассы дрожжей в конце брожения.The article describes the results of a study of the effect of water-soluble fullerene C60(OH)20-24 on the process of alcoholic fermentation in the production of alcohol. The technology for the production of mash using water-soluble fullerene is described. The content of carbohydrates, alcohol and dry residue of yeast biomass at the end of fermentation was studied.
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18.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Gerasimova Yu. V., Krylov A. S., Vtyurin A. N., Laptash N. M., Pogoreltsev E. I., Dubrovskiy A. A., Gerasimov M. A.
Заглавие : Dynamic processes of the water sublattice in FeTiF6·xH2O·yD2O crystal
Место публикации : J. Raman Spectrosc. - 2022. - Vol. 53, Is. 10: Special Issue: Vibrational Spectroscopy of Water. - P.1704-1709. - ISSN 03770486 (ISSN), DOI 10.1002/jrs.6430
Примечания : Cited References: 31. - The reported study was funded by the Russian Foundation for Basic Research, Government of Krasnoyarsk Territory and Krasnoyarsk Regional Foundation of Science according to the research project “Spectral and magnetic properties of single crystals of transition metal fluoride hexahydrates” No. 20-42-240014
Аннотация: Phase transition in FeTiF6·xH2O·yD2O crystals has been studied by Raman spectroscopy. The 611 cm-1 line corresponding to mode A1g of [TiF6]2- system does not exhibit anomalous behavior associated with the phase transition. The temperature studies showed that below the phase transition temperature, the equivalence of D2O molecules in FeTiF6·xH2O·yD2O octahedron is broken. The phase transition mechanism in the compound under study is associated with Fe(xH2O·yD2O) complex.
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19.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Fadeeva N. P., Pavlov M. V., Kharchenko I. A., Simunin M. M., Shabanova K. A., Pavlov V. F., Ryzhkov I. I.
Заглавие : High strength ceramic substrates based on perlite and foam silicates for filtration membranes
Место публикации : Membr. Membr. Technol. - 2022. - Vol. 4, Is. 3. - P.170-176. - ISSN 25177516 (ISSN), DOI 10.1134/S2517751622030040
Примечания : Cited References: 32. - The work was performed using the equipment of the Krasnoyarsk Regional Center for Collective Use of the Federal Research Center, Krasnoyarsk Science Center, Siberian Branch, Russian Academy of Sciences. This work was partially supported by the Russian Foundation for Basic Research, grant no. 18-29-19078
Аннотация: Samples of two-layer ceramics based on polydisperse powder of the pearlite mineral and foam silicates possessing high compressive strength up to 50 MPa, thermal stability up to 1150°C, and water permeability of 272 m3/h m2 bar have been obtained. According to the X-ray powder diffraction analysis, the supporting substrate material is X-ray amorphous. The average pore size of the supporting substrate is 40 µm, while the average pore size of the modifying layer is 17 µm according to the bubble method and electron microscopy. The obtained materials are promising for use as substrates of microfiltration, ultrafiltration, and nanofiltration membranes.
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20.

Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Goryainov, Sergey, V, Krylova S. N., Borodina, Ulyana O., Krylov A. S.
Заглавие : Dynamical immiscibility of aqueous carbonate fluid in the shortite-water system at high-pressure-temperature conditions
Коллективы : RFBRRussian Foundation for Basic Research (RFBR); DFGGerman Research Foundation (DFG)European Commission [21-52-12018]; Ministry of Science and Higher EducationMinistry of Science and Higher Education, PolandEuropean Commission
Место публикации : J. Phys. Chem. C. - 2021. - Vol. 125, Is. 33. - P.18501-18509. - ISSN 1932-7447, DOI 10.1021/acs.jpcc.1c05077. - ISSN 1932-7455(eISSN)
Примечания : Cited References: 47. - The reported study was funded by the RFBR and DFG, project number 21-52-12018. Work is done on the state assignment of the Sobolev Institute of Geology and Mineralogy, Kirensky Institute of Physics SB RAS, Equipment of Federal Research Center of Krasnoyarsk Science Center SB RAS, and supported by the Ministry of Science and Higher Education. Authors thank A.N. Vtyurin, A.G. Sokol, A.Yu. Likhacheva, and A.F. Shatskiy for fruitful discussion
Предметные рубрики: SIMULTANEOUSLY HIGH-PRESSURE
SODIUM FORMATE
RAMAN-SPECTRA
Аннотация: Anhydrous carbonate shortite, Na2Ca2(CO3)3, compressed in water at high pressure–temperature (up to 5 GPa, 350 °C) was studied by Raman spectroscopy. At 3.2 GPa and 250 °C, shortite begins to dissolve, followed by crystallization of aragonite and aragonite’. The unusual behavior of aqueous carbonate fluid was observed at 4.8 GPa and 300–350 °C. This process is characterized by the active formation of microbubbles within 2–60 s that are inserted one into another. Microbubbles are considered to be a result of the two immiscible fluid stratification. This dynamical immiscibility of the fluid accompanies the appearance of several crystalline carbonates and organic molecular crystals. Na-formate and some polymorphs of Ca-formate were observed.
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