Article
Materials Science, Multidisciplinary
Irina S. Kondrashkova, Kirill D. Martinson, Vadim I. Popkov
Summary: In this study, nanopowders of Ho-doped zinc ferrite were successfully produced using the glycine-nitrate combustion method and calcination in air. Various analytical techniques were employed to examine the resulting samples, revealing that an excess of fuel during the combustion process leads to amorphous foamy products that crystallize after being held at a temperature of 550 degrees C. The incorporation of holmium into the ferrite spinel structure occurs at a calcination temperature of 700 degrees C. The magnetic properties of the nanopowders are systematically altered by changes in the degree of inversion and the crystallite size of zinc ferrite.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Engineering, Chemical
Hugo Spiridigliozzi, Olivier Rouleau, Andrei Kanaev, Freïdeïric Schoenstein
Summary: We describe a controlled synthesis method of MAl2O4 (M = Mg, Co, Ni, Zn, Ba) nanopowders. The method involves three main steps: growth of ultraporous nanofibrous Al2O3 (UPA) monoliths, M-nitrate impregnation, and heat treatment. The formation of desirable nanocrystallites, such as spinel structures below 10 nm, was achieved. This synthesis route has potential applications in the fabrication of functional materials for various fields.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Qianwenhao Fan, Chuande Huang, Shibo Xi, Yong Yan, Jijiang Huang, Syed Saqline, Longgang Tao, Yihu Dai, Armando Borgna, Xiaodong Wang, Wen Liu
Summary: This study reports the development of a sintering-resistant MgO-doped Fe2O3 oxygen carrier with superior cyclic stability and high oxygen-carrying capacity. The unique solid solution mixture effectively reduces exergonicity and prevents structural transformations.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Materials Science, Ceramics
Isyraf Aznam, Joelle C. W. Mah, Andanastuti Muchtar, Nurul Akidah Baharuddin, Mahendra R. Somalu, Rahimi L. Muhamud
Summary: The catalytic properties of Ni-Cu-Mn spinels as methane reforming catalysts for hydrocarbon-fueled solid oxide fuel cell (SOFC) applications depend strongly on their reducibility, which is influenced by structural properties and fabrication processes. In this study, it was found that a minimum mixing time of 24 h during the glycine-nitrate process was sufficient to produce Ni-Cu-Mn spinel catalysts with desired structural properties and reducibility for SOFC applications. This was evidenced by phase analysis showing the presence of specific spinel structures and morphological analysis revealing homogenous particle size distribution and complete nitrate binding after 24 h of mixing.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Milena P. Dojcinovic, Zorka Z. Vasiljevic, Vera P. Pavlovic, Dario Barisic, Damir Pajic, Nenad B. Tadic, Maria Vesna Nikolic
Summary: In this study, CoxMg1-xFe2O4 spinel ferrites with various compositions were synthesized using the sol-gel combustion method. Structural analysis was conducted using XRD, FTIR, and Raman spectroscopy, revealing insights into the magnetic, optical properties and photocatalytic activity. Results indicated that the ion content of Co2+ and Mg2+ played a significant role in determining the properties of the ferrites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Wei Wang, Benxue Jiang, Tao Feng, Jintai Fan, Wanqiu Ma, Weian Guo, Jiang Li, Long Zhang
Summary: By adjusting the ratio of lutetium oxide and scandium oxide, the emission wavelength and spectral width of the laser can be controlled successfully. Yb:(LuxSc1-x)2O3 ceramics with high transmittance and broad emission band were fabricated, showing potential for ultrashort pulse generation. This research provides new possibilities for the development of ultrafast lasers.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Engineering, Chemical
Ruiyue Li, Wei Zhan, Yanqing Song, Jirong Lan, Li Guo, Tian C. Zhang, Dongyun Du
Summary: The modified Mg/Al/Fe-CLDH showed extremely high arsenate removal efficiency in a wide pH range, maintaining excellent removal efficiency in a complex anions environment and after multiple regeneration cycles. With enhancing mechanisms such as the insertion of ferric ions and the flower-like structures, the Mg/Al/Fe-CLDH has great potential for efficiently purifying arsenate from complex industrial wastewater.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Chung-Lun Yu, Guan-Ting Lai, Subramanian Sakthinathan, Chia-Cheng Lin, Te-Wei Chiu, Ming-Che Liu
Summary: Hydrogen is being considered as an alternative renewable energy transporter due to the energy crisis and climate change. In this research, CuCrO2-CeO2 nanopowders catalysts were synthesized and applied in the SRM process. The addition of CeO2 increased the H2 production rate, and the porous structure of the catalyst presented advantages in terms of cost and simplicity. The 50CuCrO2-50CeO2 nanopowders could have significant economic future.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Materials Science, Ceramics
Hanaa Almaghamsi, N. M. Basfer
Summary: This study describes the synthesis of pure and Bi3+ doped Mg-Cu nanophotocatalysts (MCBF) for the disposal of the dangerous pollutant Rhodamine B (RhB). The structural, morphological, optical, and photocatalytic degradation characteristics of MCBF were investigated. The MCBF5 catalyst, with the highest bismuth content, showed excellent stability and the supreme RhB degradation of 95.81%, making it a potential catalyst for wastewater purification under sunlight.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Ling Tan, Qikun Wang, Zhipeng Cheng, Zhiwei Hu, Kun Liu, Yongqing Wang, Qibing Chang
Summary: This paper successfully synthesized CuxCo1-xAl2O4 blue pigments, suitable for ceramic decoration and ceramic ink-jet printing technology. The intensity of blue hue of the pigments decreases with increase of the Cu/Co ratio, while it increases with increase of the calcination temperature.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Rika Yokozaki, Hiroaki Kobayashi, Itaru Honma
Summary: Reducing the particle size of spinel oxide MgMn2O4 can enhance Mg-ion diffusion and improve rate capability.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Felipe Antonio Lucca Sanchez, Willians Lopes de Almeida, Vania Caldas de Sousa
Summary: The central point of this study is to investigate the influence of fuel (glycine, urea, citric acid and sucrose) and calcination temperature on obtaining calcium aluminate in the mayenite phase through solution combustion synthesis (SCS). Through various analyses including X-ray diffraction (XRD), Raman spectroscopy, specific surface area measurement, and laser granulometry, the relationship between fuel, heat treatment, phase formation, crystallite size, and powder crystallinity was elucidated. Glycine exhibited the best performance, achieving pure mayenite with nanometric crystallite size at the lowest calcination temperature among all ranges. Therefore, the type of fuel and calcination temperature both play crucial roles in obtaining pure mayenite, with glycine showing the highest performance.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
T. S. S. C. Bispo, V. V. Assuncao, L. R. Oliveira, K. G. B. Alves, J. Kulesza, B. S. Barros
Summary: Nanocrystalline mixed oxides of cobalt and manganese with spinel structure were successfully synthesized using the self-combustion method. The catalytic performance of the obtained samples was evaluated, and the effect of calcination on the microstructural and catalytic properties was studied. The results showed that the sample with a higher cobalt content exhibited the best catalytic performance.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Thanh Son Cam, Shamil Omarov, Andrey Trofimuk, Vasily Lebedev, Vitaly Panchuk, Valentin Semenov, Anh Tien Nguyen, Vadim Popkov
Summary: Foam-like nanocomposites of the Ce-Fe-O system with different phases were synthesized using the RedOx reaction of glycine-nitrate combustion. The obtained samples exhibited varying characteristics such as crystallite size, specific surface area, and catalytic performance. The findings provide guidance for the directed synthesis of efficient catalysts based on the Ce-Fe-O system.
JOURNAL OF SCIENCE-ADVANCED MATERIALS AND DEVICES
(2023)
Article
Materials Science, Multidisciplinary
Atefeh Ghaedamini, Manoochehr Sobhani
Summary: In this study, magnesium aluminate spinel was synthesized with cobalt addition, which improved the crystallization and densification of nanopowders but also led to increased grain boundary mobility and decreased hardness at high temperatures.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Chemistry, Inorganic & Nuclear
O. V. Proskurina, A. N. Sokolova, A. A. Sirotkin, R. Sh. Abiev, V. V. Gusarov
Summary: Nanocrystalline bismuth orthoferrite was prepared using the hydroxide coprecipitation method, resulting in a narrow crystallite-size distribution and the smallest crystallite size of about 6-7 nm, free of other phases of the Bi2O3-Fe2O3 system.
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Physics, Applied
V. B. Khabensky, V. Almjashev, V. S. Granovsky, E. Krushinov, S. A. Vitol, S. Yu Kotova, V. V. Gusarov
Summary: In the event of a severe accident at a nuclear power plant, retaining the formed melt in the cooled reactor vessel is an effective method, but factors such as oxidation and heat load from exothermal reactions need to be considered. By proposing a dependence based on a diffusion model, the oxidation rate of the corium melt can be calculated and validated using experimental data.
Article
Chemistry, Physical
M. S. Lomakin, O. V. Proskurina, A. A. Sergeev, I. V. Buryanenko, V. G. Semenov, S. S. Voznesenskiy, V. V. Gusarov
Summary: This study investigated the influence of hydrothermal synthesis conditions on nanocrystalline particles with a phase of variable composition. The BFWO phase structural parameters were found to be affected by the chemical composition, while the average crystallite size and aggregate size changed with different hydrothermal synthesis conditions. Furthermore, the Eg value was shown to decrease with an enrichment of BFWO composition in Bi and Fe, and a decrease in the volume fraction of crystallites in the surface layer of aggregates.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Aleksandr Levin, Ekaterina Khrapova, Daniil Kozlov, Andrei Krasilin, Victor Gusarov
Summary: The morphology and structure of (NixMg1-x)(3)Si2O5(OH)(4) synthetic phyllosilicate nanoscrolls were investigated, revealing the mechanism and direction of scrolling, and concluding that scrolling is an effective means of stress relaxation.
JOURNAL OF APPLIED CRYSTALLOGRAPHY
(2022)
Article
Nanoscience & Nanotechnology
Anastasiya N. Sokolova, Olga V. Proskurina, Dmitry P. Danilovich, Victor V. Gusarov
Summary: Nanopowders of Y1-xBixFeO3 solid solutions were synthesized through a combination of co-precipitation and thermal treatment. The results showed that the crystallite size increased with the bismuth content in the solid solution. The YFeO3 nanopowder with the smallest crystallite size exhibited the highest photocatalytic activity under visible light irradiation.
NANOSYSTEMS-PHYSICS CHEMISTRY MATHEMATICS
(2022)
Article
Chemistry, Multidisciplinary
Sergey S. Kozlov, Anna B. Nikolskaia, Olga V. Alexeeva, Ekaterina K. Kosareva, Oksana V. Almjasheva, Viktor V. Gusarov, Oleg I. Shevaleevskiy, Liudmila L. Larina
Summary: Thin films based on the ternary complex oxide Bi0.50Fe0.4WOq with a cubic pyrochlore structure were used as electron-transport layers in perovskite solar cells for the first time, resulting in a power conversion efficiency approximately 4% higher than that of state-of-the-art TiO2-based perovskite solar cells.
MENDELEEV COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Dmitry P. Elovikov, Olga V. Proskurina, Maria V. Tomkovich, Valery L. Ugolkov, Victor V. Gusarov
Summary: A nanocrystalline powder of waylandite-structured bismuth hydroaluminophosphate was successfully synthesized under hydrothermal conditions, and it was found to remain stable below 500 degrees C. Decomposition occurred in the range of 540-800 degrees C, resulting in the formation of multiple phases, while complete thermal decomposition and the formation of crystalline alpha-Al2O3 occurred above 800 degrees C.
NANOSYSTEMS-PHYSICS CHEMISTRY MATHEMATICS
(2022)
Article
Chemistry, Inorganic & Nuclear
Maria O. Enikeeva, Olga V. Proskurina, Aleksandr A. Levin, Alexandr V. Smirnov, Vladimir N. Nevedomskiy, Victor V. Gusarov
Summary: Nanopowders with a rhabdophane structure were synthesized by hydrothermal-microwave method. Various characterization techniques were used to study the nanopowders, revealing the formation of rod-like single-crystal nanoparticles with isolated pores inside. A mechanism of coherent-accommodative intergrowth of nanoscale clusters with rhabdophane structure was proposed to explain the formation of these nanoparticles.
JOURNAL OF SOLID STATE CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Makariy S. Lomakin, Olga V. Proskurina, Victor V. Gusarov
Summary: This study investigates the features of the formation of a (Bi, Fe, ❑)2(Fe, W)2O6O0 delta cubic pyrochlore-structured phase (BFWO) in the Bi2O3-Fe2O3-WO3-(H2O) system under hydrothermal synthesis conditions. It was found that the BFWO phase is formed even at low temperatures and pH levels. The particles of the BFWO phase have a spherical morphology and are polycrystalline. The size of the BFWO particles mainly increases due to an increase in the size of their constituent crystallites with the increasing temperature in the considered temperature range.
NANOSYSTEMS-PHYSICS CHEMISTRY MATHEMATICS
(2023)
Article
Materials Science, Multidisciplinary
T. P. Maslennikova, E. N. Gatina, M. E. Kotova, V. L. Ugolkov, R. Sh. Abiev, V. V. Gusarov
Summary: This study examines the effects of different methods on the size parameters of magnesium hydroxide nanoparticles and their influence on the formation, geometric characteristics, and thermal behavior of hydrosilicate nanoscrolls. Regardless of the method and treatment time, magnesium hydrosilicate nanoscrolls with chrysotile structure can be formed. However, the distribution of nanoscroll length and diameter depends on the method of preparing magnesium hydroxide. The exothermic peak temperature of the conversion from magnesium hydrosilicate to magnesium silicate with forsterite structure is higher when using reverse precipitation method (825°C) compared to the microreactor method (817°C).
INORGANIC MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Oksana Almjasheva, Vadim Popkov, Olga Proskurina, Victor V. Gusarov
Summary: A systematic analysis of literature data on the influence of synthesis methods and conditions on the possibility of self-organization of particle growth restrictions during solid phase chemical reactions has been conducted. The prospects of using such methods to obtain nano-crystalline phases are demonstrated. It is shown that the risk of forming precursor phases instead of target products is a disadvantage of these synthesis methods. To avoid such an outcome, several synthesis methods are proposed. Based on the analysis of literature data, examples of transforming precursor nanoparticles into nanocrystals of target phases are classified and presented. A scheme is designed to achieve optimal combination of synthesis methods for obtaining nano-crystalline particles with desired composition, structure, size, and shape.
NANOSYSTEMS-PHYSICS CHEMISTRY MATHEMATICS
(2022)
Article
Nanoscience & Nanotechnology
A. B. Nikolskaia, M. F. Vildanova, S. S. Kozlov, O. Almjasheva, V. V. Gusarov, O. Shevaleevskiy
Summary: By utilizing nanostructured metal oxide layers as photoelectrodes in semitransparent perovskite solar cells, the performance of high-performance four-terminal tandem perovskite-silicon solar cells was improved, increasing the overall efficiency significantly.
NANOSYSTEMS-PHYSICS CHEMISTRY MATHEMATICS
(2021)
Article
Chemistry, Inorganic & Nuclear
N. A. Lomanova, M. Tomkovich, A. Osipov, V. L. Ugolkov, V. V. Panchuk, V. G. Semenov, V. V. Gusarov
Summary: The formation mechanism of Bim+ 1Fem- 3Ti3O3m+ 3 nanocrystals depends on their composition, which is crucial for the technology of directed synthesis of nanocrystalline multiferroics.
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Engineering, Chemical
R. Sh. Abiev, O. V. Proskurina, M. O. Enikeeva, V. V. Gusarov
Summary: The study explores the impact of hydrodynamic conditions on the formation of nanoparticles in an impinging-jet microreactor, revealing unique turbulence characteristics and high energy dissipation rates. It also discusses the role of a self-organizing nanoreactor in determining particle size and weight, as well as the influence of different mechanisms of chemical reactions on nanoparticle size during microreactor mixing under soft chemistry conditions.
THEORETICAL FOUNDATIONS OF CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
M. F. Vildanova, A. B. Nikolskaia, S. S. Kozlov, O. Shevaleevskiy, V Almjasheva, V. V. Gusarov
Summary: Nanostructured Group IV oxides have been synthesized and utilized as photoelectrodes for perovskite solar cells. Differences in photovoltaic characteristics of PSCs are attributed to morphology and charge transfer features of mesoporous HfO2 and ZrO2 layers. The results indicate promising prospects for the application of nanostructured Group IV oxide materials in high-efficiency PSCs.
DOKLADY PHYSICAL CHEMISTRY
(2021)
