M. V. Kalinina, I. G. Polyakova, S. V. Myakin, T. V. Khamova, L. N. Efimova, I. Yu. Kruchinina
{"title":"Synthesis and Physicochemical Characterization of Solid Oxide Electrolyte and Electrode Materials for Medium-Temperature Fuel Cells","authors":"M. V. Kalinina, I. G. Polyakova, S. V. Myakin, T. V. Khamova, L. N. Efimova, I. Yu. Kruchinina","doi":"10.1134/S0036023623603173","DOIUrl":"10.1134/S0036023623603173","url":null,"abstract":"<p>Xerogels and finely dispersed СeO<sub>2</sub>–Nd<sub>2</sub>O<sub>3</sub> and Gd<sub>2</sub>O<sub>3</sub>–La<sub>2</sub>O<sub>3</sub>–SrO–Ni(Co)<sub>2</sub>O<sub>3–δ</sub> mesoporous powders are synthesized by cocrystallization of the corresponding nitrate solutions with ultrasonic treatment, and used to prepare nanoceramic materials with a fluorite-like and orthorhombic perovskite crystal structures, respectively, with CSRs of ca. 55–90 nm (1300°C). The physicochemical characterization of the prepared ceramic materials revealed an open porosity of 7–11% for СeO<sub>2</sub>–Nd<sub>2</sub>O<sub>3</sub> ceramics and 17–42% for Gd<sub>2</sub>O<sub>3</sub>–La<sub>2</sub>O<sub>3</sub>–SrO–Ni(Co)<sub>2</sub>O<sub>3–δ</sub> ceramics. Cerium oxide-based materials possess a predominantly ionic electrical conductivity with σ<sub>700°С</sub> = 0.31 × 10<sup>–2</sup> S/cm (the ion transference number <i>t</i><sub>i</sub> = 0.71–0.89 in the temperature range 300–700°C) due to the formation of mobile oxygen vacancies upon heterovalent substitution of Nd<sup>3+</sup> for Се<sup>4+</sup>. Solid solutions based on gadolinium nickelate and gadolinium cobaltite feature a mixed electronic–ionic conductivity (σ<sub>700°С</sub> = 0.59 × 10<sup>–1</sup> S/cm) with the electron and ion transference numbers <i>t</i><sub>e</sub> = 0.92–0.99 and <i>t</i><sub>i</sub> = 0.08–0.01. The prepared ceramic materials are shown to be promising as solid oxide electrolytes and electrodes for medium-temperature fuel cells.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"69 3","pages":"297 - 303"},"PeriodicalIF":1.8,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141720059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. A. Gavrilova, D. A. Gavrilova, S. K. Evstrop’ev, N. V. Nikonorov
{"title":"Structure, Spectral and Photocatalytic Properties of Porous ZnO Nanopowders Modified by Oxide Compounds of Manganese","authors":"M. A. Gavrilova, D. A. Gavrilova, S. K. Evstrop’ev, N. V. Nikonorov","doi":"10.1134/S0036023623602994","DOIUrl":"10.1134/S0036023623602994","url":null,"abstract":"<p>Abstract—Porous nanocomposites based on oxide compounds of zinc and manganese are synthesized, and their structure, morphology, spectral and photocatalytic properties are studied. The porous oxide composites have photocatalytic properties and consist of ZnO, Mn<sub>3</sub>O<sub>4</sub>, and ZnMn<sub>2</sub>O<sub>4</sub> nanocrystals with sizes of 20–40 nm. The incorporation of Mn<sup>2+</sup> ions into the ZnO crystal lattice causes a 0.9% increase in the unit cell volume. The band gap of the composites is 3.26 eV. The kinetics of photocatalytic degradation of Chicago Blue Sky dye in solution is described by a pseudo-first order equation. In the presence of porous nanocomposites, the oxidation of organic compounds proceeds both on the photocatalyst surface and in the solution bulk. The synthesized nanocomposites show promise for use in photocatalytic systems for water purification from organic contaminants and for water splitting to oxygen and hydrogen for hydrogen energy production.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"69 3","pages":"377 - 384"},"PeriodicalIF":1.8,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141639791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. P. Voznyakovskii, A. A. Vozniakovskii, S. V. Kidalov
{"title":"Few-Layer Graphene Produced by the Self-Propagating High-Temperature Process from Biopolymers: Synthesis, Properties, and Application (a Review)","authors":"A. P. Voznyakovskii, A. A. Vozniakovskii, S. V. Kidalov","doi":"10.1134/S0036023623603185","DOIUrl":"10.1134/S0036023623603185","url":null,"abstract":"<p>This review is concerned with the production of 2D graphene nanostructures (few-layer graphene; FLG) by our developed method for carbonization of biopolymers implemented in a self-propagating high-temperature synthesis (SHS) process. Here, we analyze and summarize the experimental and some theoretical results, which served us to design a phenomenological model for the SHS synthesis of 2D graphene structures. The main focus is on the results obtained over the last decade. The prospects for ongoing research into the carbonization of biopolymers are discussed. Particular attention is paid to those areas of research that are expected to be of most interest for the use of few-layer graphene in the near future.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"69 3","pages":"334 - 340"},"PeriodicalIF":1.8,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141720058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. A. Vorozhtcov, V. I. Almjashev, V. L. Stolyarova
{"title":"Modeling of Phase Equilibria in the La2O3–SrO–ZrO2 System Using the NUCLEA Database","authors":"V. A. Vorozhtcov, V. I. Almjashev, V. L. Stolyarova","doi":"10.1134/S0036023623602957","DOIUrl":"10.1134/S0036023623602957","url":null,"abstract":"<p>The goal of this work was to study phase equilibria in the La<sub>2</sub>O<sub>3</sub>–SrO–ZrO<sub>2</sub> system, which is a promising base for high-temperature ceramics and materials with unique optical, electrochemical, and catalytic properties. Thermodynamic modeling of phase equilibria in this system was carried out using the NUCLEA database and GEMINI2 (Gibbs Energy Minimizer) software. One polythermal and thirteen isothermal sections of the La<sub>2</sub>O<sub>3</sub>–SrO–ZrO<sub>2</sub> phase diagram were calculated in the temperature range 600–3023 K. The obtained data on La<sub>2</sub>O<sub>3</sub>–SrO–ZrO<sub>2</sub> phase equilibria were discussed with reference to information available on the corresponding binary systems. The modeled phase relations in the ternary system under study correlate completely with the phases existing in the corresponding binary systems. The temperature evolution of the phase relations and boundaries of single-phase, two-phase, and three-phase areas in the system were considered. Four ternary eutectic points were identified at 2039, 2105, 2120, and 2351 K.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"69 3","pages":"420 - 433"},"PeriodicalIF":1.8,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141720030","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Two-Dimensional Zinc Oxide and Manganese(II, III) Oxide Nanocrystals Having Perforated Nanosheet Morphology Prepared by the Surface Hydrolysis of Mn(OAc)2 and Zn(OAc)2 Aqueous Solutions with Gaseous Ammonia","authors":"V. P. Tolstoi, L. B. Gulina, E. E. Shilovskikh","doi":"10.1134/S0036023623700377","DOIUrl":"10.1134/S0036023623700377","url":null,"abstract":"<p>We are the first to show that 2D ZnO nanocrystals with the wurtzite structure and Mn<sub>3</sub>O<sub>4</sub> nanocrystals with the hausmannite structure having perforated nanosheet (PNS) morphology can be prepared on the basis of compounds that are formed in reactions occurring on the surface of aqueous solutions of corresponding metal acetates exposed to gaseous NH<sub>3</sub>. Application of these nanocrystals on silicon makes the silicon surface hydrophobic in the case of ZnO and superhydrophilic in the case of Mn<sub>3</sub>O<sub>4</sub>. The proposed synthetic method can provide sequential and multiple deposition of these compounds on a substrate. Such “multilayers” can exhibit new properties.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"69 3","pages":"319 - 325"},"PeriodicalIF":1.8,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141720035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Phase Diagram and Metastable Phases in the LaPO4–YPO4–(H2O) System","authors":"M. O. Enikeeva, O. V. Proskurina, V. V. Gusarov","doi":"10.1134/S0036023623603021","DOIUrl":"10.1134/S0036023623603021","url":null,"abstract":"<p>Phase formation in the LaPO<sub>4</sub>–YPO<sub>4</sub>–(H<sub>2</sub>O) system have been studied under hydrothermal conditions at <i>T</i> ~ 230°C and after heat treatment in air in the temperature range 1000–1400°C. The phase equilibria diagram in the system has been constructed for the LaPO<sub>4</sub>–YPO<sub>4</sub> system. The regions of metastable binodal and spinodal decomposition of a phase with a monazite structure with a critical point <i>T</i><sub>cr</sub> = 931°C have been calculated. The experimentally determined eutectic temperature of 1850 ± 35°C is in good agreement with the calculated value <i>T</i><sub>e</sub> = 1820°C. The maximum solubility of YPO<sub>4</sub> in LaPO<sub>4</sub> at eutectic temperature obtained from the results of thermodynamic optimization of the phase diagram is 50.5 mol %.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"69 3","pages":"410 - 419"},"PeriodicalIF":1.8,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141722570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. K. Evstropiev, V. L. Stolyarova, A. S. Saratovskii, D. V. Bulyga, K. V. Dukelskii, N. B. Knyazyan, D. A. Yurchenko
{"title":"Luminescent Mn2+-Doped MgO–Al2O3–ZrO2–SiO2 Sol–Gel Materials","authors":"S. K. Evstropiev, V. L. Stolyarova, A. S. Saratovskii, D. V. Bulyga, K. V. Dukelskii, N. B. Knyazyan, D. A. Yurchenko","doi":"10.1134/S0036023623603446","DOIUrl":"10.1134/S0036023623603446","url":null,"abstract":"<p>Mn<sup>2+</sup>-doped MgO–Al<sub>2</sub>O<sub>3</sub>–ZrO<sub>2</sub>–SiO<sub>2</sub> materials have been synthesized by the sol–gel method, and their structure, morphology, chemical composition, and luminescent properties have been studied using X-ray diffraction, scanning electron microscopy, EDX analysis, and luminescence spectroscopy. The sol–gel method has been shown to ensure high homogeneity of the chemical composition over the volume of the synthesized materials. The introduction of Mn into the composition of sol–gel materials significantly accelerates crystallization processes in them during heat treatment. The luminescence spectra of the materials display several groups of emission bands in the blue and yellow-red parts of the visible spectral range. The resulting materials are promising for use as phosphors in the lighting for plant production.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"69 3","pages":"385 - 391"},"PeriodicalIF":1.8,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141639766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis and Phase Formation in Ba0.9Ca0.1Zr0.05M0.10Ti0.85O3 (M = Mn, Fe, Co) Oxide Ceramics Having Controllable Magnetic and Optical Properties","authors":"A. V. Fedorova, A. A. Selyutin, N. A. Medzatyi","doi":"10.1134/S0036023623603276","DOIUrl":"10.1134/S0036023623603276","url":null,"abstract":"<p>Ceramic Ba<sub>0.9</sub>Ca<sub>0.1</sub>Zr<sub>0.05</sub>M<sub>0.10</sub>Ti<sub>0.85</sub>O<sub>3</sub> (M = Mn, Fe, or Co) samples with perovskite structure were prepared by ordinary solid-phase technology. Phase formation in the prepared samples was investigated, and their unit cell parameters were determined by X-ray powder diffraction. Magnetic and optical properties of the samples were investigated by magnetic susceptibility measurements and diffuse reflectance spectroscopy. The phase composition, magnetic and optical properties were found to depend on the nature of the doped paramagnetic element.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"69 3","pages":"369 - 376"},"PeriodicalIF":1.8,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141639786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Crystallization of New Inorganic Fluoride Nanomaterials at Soft Chemistry Conditions and Their Application Prospects","authors":"L. B. Gulina, V. P. Tolstoy, I. V. Murin","doi":"10.1134/S0036023623603070","DOIUrl":"10.1134/S0036023623603070","url":null,"abstract":"<p>The formation and growth specifics of metal fluoride MF<sub>2</sub> (where M = Ca, Sr, or Pb) and MF<sub>3</sub> (where M = Sc, La, or Ln) crystals by reacting components of aqueous metal salt solutions with hydrogen fluoride gas at the planar solution–gas interface at room temperature are considered. Compounds with different crystal structures: PbF<sub>2</sub> (space groups <i>Pnma</i> and <i>Fm</i><span>(bar {3})</span><i>m</i>), ScF<sub>3</sub> (sp. gr. <i>Pm</i><span>(overline{3})</span><i>m</i> and <i>P</i>6/<i>mmm</i>), and LaF<sub>3</sub> (space group <span>(Pbar {3}c)</span>1) were chosen as objects of study. The factors having a significant influence on the morphology, size, and ordering of the grown crystals have been identified. An opportunity to prepare 1D and 2D crystals has been shown for some compounds. Probable applications fields of nanomaterials based on the prepared compounds are analyzed. The conclusion is made about a potential of the interface technique for use in the design of new solid electrolytes, optically active materials, and functional coatings.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"69 3","pages":"285 - 296"},"PeriodicalIF":1.8,"publicationDate":"2024-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141720033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Construction of ZCS/Cu3P/AgCl Composites for Enhanced Removal of Rhodamine B: Performance and Mechanism","authors":"Xiao-fang Li, Song-ze Wu, Jing Wang, Yue Ding, Xiao-qiang Feng","doi":"10.1134/s0036023624600308","DOIUrl":"https://doi.org/10.1134/s0036023624600308","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Based on the excellent adsorption, photosensitization and electron transfer properties of biochar, this paper constructed a composite material with the synergic effect of adsorption and photocatalysis to realize the integrated adsorption-enrichment and degradation of Rh B. Hence, a novel efficient ZCS/Cu<sub>3</sub>P/AgCl adsorption-photocatalyst is synthesized and characterized by various testing methods. The efficient removal of dye Rh B is achieved through a synergistic effect between adsorption and photocatalytic degradation. Photocatalytic experiments showed that all the ZCS/Cu<sub>3</sub>P/AgCl composites with different AgCl content exhibit superior photocatalytic activity for Rh B degradation, and when the content of AgCl is 31%, the photocatalytic activity is the best. After 30 min of dark adsorption, 30% of Rh B was removed by adsorption, and 98.76% of Rh B was removed after continuous visible light irradiation for 20 min. The kinetic constant of 31%-ZCS/Cu<sub>3</sub>P/AgCl composite was 0.346 min<sup>–1</sup>, which is about 24.7 and 3.8 times that Cu<sub>3</sub>P (0.014 min<sup>–1</sup>) and AgCl (0.091 min<sup>–1</sup>), respectively. Moreover, photo-luminescence and photoelectrochemical experiment confirmed that the surface of ZCS/Cu<sub>3</sub>P/AgCl is exposed to more active sites, the charge separation process is enhanced and the photogenerated electron–hole recombination efficiency is reduced compared with Cu<sub>3</sub>P and AgCl. Finally, h<sup>+</sup> and ·O<span>(_{2}^{ - })</span> are identified the main active species in the photocatalytic reaction system, and a possible photocatalytic mechanism was put forward. ZCS/Cu<sub>3</sub>P/AgCl composites have excellent photocatalytic performance and recyclability, and are expected to be an important material to solve dye pollutants in water.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"35 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141551815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}