Russian Journal of Inorganic Chemistry最新文献

{"title":"Sol-Gel Synthesis, Structure, and Adsorption Properties of LiMgxMn(2 – x)O4 (0 ≤ x ≤ 0.7) Oxides","authors":"Sh. A. Begimkulova, A. M. Nasimov, O. N. Ruzimuradov, V. G. Prozorovich, A. I. Ivanets","doi":"10.1134/s0036023624600485","DOIUrl":"https://doi.org/10.1134/s0036023624600485","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Lithium manganese oxides with a spinel structure LiMg_<i>x</i>Mn_{(2 –} _<i>x</i>)O₄ doped with Mg²⁺ ions in the range 0 ≤ <i>x</i> ≤ 0.7, were obtained by sol-gel synthesis. Phase composition and morphology of obtained oxides were studied by X-ray powder diffraction and scanning electron microscopy. It is shown, that in the studied range 0 ≤ <i>x</i> ≤ 0.7 Mg-doped lithium manganese oxides saved the structure of the original cubic spinel LiMn₂O₄, while an increase in parameter <i>a</i> was observed from 8.175 to 8.309 Å and average crystallite size practically unchanged (30–36 nm). Samples of the initial LiMn₂O₄ spinel and Mg-doped spinel consisted of prismatic particles of submicron (0.1–0.2 µm) and micron (1.0–3.0 µm) sizes, respectively. The effect of the adsorbent dose (0.05–0.3 g/L) and pH (3.0–13.0) of the solution on the adsorption efficiency was studied. The adsorption isotherms of samples LiMg_0.3Mn_1.7O₄ were described by the Langmuir monomolecular adsorption equation. An increase in the temperature of the model solution from 25 to 45°C was accompanied by an increase in the maximum adsorption of the LiMg_0.3Mn_1.7O₄ samples from 10.50 to 10.98 mmol/g, which indicates the endothermic nature of the adsorption process. The kinetics of adsorption was well described by a pseudo-second order equation, which indicates the occurrence of chemical interaction during the adsorption process.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"49 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863699","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":"Functional Design of Peroral Iron Compound Delivery Systems Based on Polymethylsilsesquioxane Hydrogels for the Therapy of Iron Deficiency Anemia","authors":"P. D. Orlova, I. B. Meshkov, E. V. Latipov, S. G. Vasil’ev, A. A. Kalinina, A. M. Muzafarov, I. M. Le-Deygen","doi":"10.1134/s0036023624600266","DOIUrl":"https://doi.org/10.1134/s0036023624600266","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>An approach to the development of peroral iron drug delivery systems for the therapy of iron deficiency anemia is proposed. The new systems are based on polymethylsilsesquioxane hydrogels with a variable structure as biocompatible and biodegradable supports. The hydrogels are found to exhibit a high sorption capacity toward a saturated solution of FeCl₃∙6H₂O (0.27 M), whereas the sorption capacity toward a saturated solution of iron D-gluconate (0.24 M) is lower and amounts to ~30%. The developed delivery systems are studied by IR and UV spectroscopy, and the iron atom distribution over the hydrogels is studied. The prepared systems are found to be promising for the further development of drug formulations.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"48 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863664","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 of New Hybrid Materials of SiO2@Melamine-Cyanurate as Precursors for Graphite-Like Carbon Nitride","authors":"M. D. Lebedev, A. A. Goncharenko, I. A. Skvortsov, M. S. Kuzmikov, A. S. Vashurin","doi":"10.1134/s0036023624600217","DOIUrl":"https://doi.org/10.1134/s0036023624600217","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This work describes the use of silica particles obtained by sol-gel method as a template for deposition of supramolecular complexes of melamine cyanurate. To obtain SiO₂@melamine-cyanurate (SiO₂@MCA) material, the method of covalent modification of silica surface by melamine molecules (SiO₂-mel) was applied and the method of its further functionalization by hydrogen-bonded organic framework of melamine-cyanurate (HOF, MCA) was proposed. One of the promising directions of using SiO₂@melamine-cyanurate is obtaining the SiO₂@g-C₃N₄ material based on it. Control of the amount of applied melamine-cyanurate allows one to potentially obtain g-C₃N₄ layers of different thicknesses on the silica surface.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"28 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863703","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":"Gas-Sensing Properties of the Ti0.2V1.8CTx/V2O5 Nanocomposite","authors":"E. P. Simonenko, A. S. Mokrushin, I. A. Nagornov, V. M. Sapronova, Yu. M. Gorban, Ph. Yu. Gorobtsov, T. L. Simonenko, N. P. Simonenko, N. T. Kuznetsov","doi":"10.1134/s0036023624600850","DOIUrl":"https://doi.org/10.1134/s0036023624600850","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A method was developed for producing a nanocomposite containing a Ti_0.2V_1.8CT_<i>x</i> MXene core and surface layers of titanium-doped vanadium oxide by relatively low temperature partial oxidation of multilayer MXene, a two-dimensional vanadium titanium carbide. It was shown that, during the oxidation of the initial Ti_0.2V_1.8CT_<i>x</i> in an air atmosphere at a temperature of 250°C, the microstructure of accordion-like aggregates is preserved with a slight increase in the porosity of their constituent layers and an increase in their thickness due to the formation of V₂O₅. The MXene structure was detected to be preserved with a decrease in the interplanar distance from 10.3 Å (initial Ti_0.2V_1.8CT_<i>x</i> powder) to 7.3 Å. Raman spectroscopy confirmed the formation of vanadium oxide. Kelvin probe force microscopy determined that, in the formation of Ti_0.2V_1.8CT_<i>x</i>/V₂O₅ nanocomposite, the work function decreases from 4.88 eV (Ti_0.2V_1.8CT_<i>x</i>) to 4.68 eV. A comprehensive analysis was made of the chemosensory properties of Ti_0.2V_1.8CT_<i>x</i>/V₂O₅ layers deposited by microplotter printing to a number of gaseous analytes (H₂, CO, NH₃, NO₂, C₆H₆, C₃H₆O, CH₄, C₂H₅OH, and O₂). At elevated detection temperatures (125–200°C), high sensitivity to oxygen (10% O₂) and NO₂ (100 ppm) was detected; throughout the entire temperature range (25–200°C), there were noticeable responses to humidity (50% RH). If the temperature detection was room temperature, good sensitivity to acetone, ethanol, and ammonia was observed.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"75 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863662","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":"Stability of Supramolecular β-Cyclodextrin–Pyrene Complexes in a Silicate Hydrogel Matrix","authors":"A. V. Kondakova, A. A. Medvedeva, A. V. Koshkin","doi":"10.1134/s0036023624600400","DOIUrl":"https://doi.org/10.1134/s0036023624600400","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In order to use the β-cyclodextrin–pyrene complex as a fluorescent receptor center, its stability in the solid phase of a water-soluble silicate gel was studied. For this purpose, a technique for obtaining a silicate matrix with a high content of supramolecular complexes was developed and the temperature stability of the resulting material was investigated. Optimal conditions for operating with complexes in the silica gel matrix were identified. Comparative studies of the fluorescence spectra of complexes in liquid and solid phases were carried out by the method of fluorescence spectroscopy. As a result of the work, it was possible to determine the main patterns of behavior of the supramolecular complex in the silicate hydrogel matrix and to conclude about the influence of the matrix structure on its stability.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"22 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863666","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 of Heterogeneous Nanocomposite Catalyst ZrO2@SBA-15 for Formic Acid Production from Hemicelluloses","authors":"S. A. Novikova, Ya. R. Shaer, A. O. Eremina, V. V. Sychev, S. V. Baryshnikov, O. P. Taran","doi":"10.1134/s0036023624600497","DOIUrl":"https://doi.org/10.1134/s0036023624600497","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Heterogeneous nanocomposite ZrO₂@SBA-15 catalysts containing 10 wt % of zirconium oxide were synthesized by two methods: (i) co-condensation and (ii) incipient wetness impregnation. The catalysts and their carriers were characterized by X-ray powder diffraction, X-ray fluorescence analysis, low-temperature nitrogen adsorption–desorption, and FTIR-spectroscopy. As a result of zirconia introduction into the silica wall, the mesostructure of SBA-15 is preserved, but the specific surface area and pore volume are reduced. It was found that during one-stage synthesis, the particle fibers shorten and stick together. The catalysts were tested in the process of catalytic hydrolysis-oxidation of hemicelluloses of aspen wood. The optimal formic acid synthesis conditions were determined to be 150°С and 3 h. The highest formic acid yield obtained using the catalyst prepared by co-condensation under best reaction conditions was 28.4 wt %.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"11 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863704","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":"Electronic Structure of Cobalt Phosphates Co1 – xMxPO4 Doped with Iron and Nickel Atoms","authors":"M. D. Pecherskaya, O. A. Galkina, O. N. Ruzimuradov, Sh. I. Mamatkulov","doi":"10.1134/s0036023624600540","DOIUrl":"https://doi.org/10.1134/s0036023624600540","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In this research, the electronic states, band structures, and bond properties of the framework compounds of CoPO₄, Co_{1 –} _<i>x</i>Fe_<i>x</i>PO₄, and Co_{1 –} _<i>x</i>Ni_<i>x</i>PO₄ were investigated by the density functional theory calculations. The potential capabilities of these systems in the photocatalytic water splitting to produce hydrogen were analyzed. The spin-up electron densities of states for the CoPO₄, Co_{1 –} _<i>x</i>Fe_<i>x</i>PO₄, and Co_{1 –} _<i>x</i>Ni_<i>x</i>PO₄ systems have band gaps of 2.7, 3.4, and 3.45 eV, respectively. The band of spin-down electron states has several energy gaps above the Fermi level. The density of states of electron with spin up near the Fermi level is obviously greater than that of electrons with spin down. In this case, localized states of electrons appear in the band gap of doped semiconductors due to impurity atoms. The calculated value of the energy at the lower edge of the conduction band for CoPO₄ was –0.7 eV, which is more negative than the energy required for water splitting. Meanwhile, the calculated value of the energy at the upper edge of the valence band was 2.01 eV, which is more positive than the oxygen evolution energy of 1.23 eV.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"19 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863660","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 Study of Sorption Properties of Ca3La6(SiO4)6 Biocomposite for Targeted Delivery of 5-Fluorouracil","authors":"O. O. Shichalin, O. V. Kapustina, Z. E. Kornakova, S. S. Gribanova, V. Y. Mayorov, A. N. Fedorets, A. O. Lembikov, V. V. Vasilyeva, I. Y. Buravlev, V. I. Apanasevich, E. K. Papynov","doi":"10.1134/s0036023624600412","DOIUrl":"https://doi.org/10.1134/s0036023624600412","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The dispersed Ca₃La₆(SiO₄)₆ biocomposite was obtained by treating a calcium silicate sol containing 0.1, 0.3, and 0.7 mol of La³⁺ under hydrothermal conditions. The composition, morphology, and structure of the biocomposite were studied by powder X-ray diffraction, SEM, and EDS methods. The reaction products (CaSiO₃, CaLa₄(SiO₄)₃O, Ca₃La₆(SiO₄)₆) depending on the La³⁺ concentration were determined. The structural characteristics of biocomposite powders with different La³⁺ contents were investigated by BET and DFT methods. The sorption characteristics of the materials towards 5-fluorouracil were studied depending on pH. The highest sorption capacity (0.768 mg/g at pH 3) was found for the Ca₃La₆(SiO₄)₆ sample containing 0.3 mol of La³⁺. Additionally, the biocompatible properties of biocomposite samples in contact with artificial blood plasma were evaluated by establishing the key changes in their composition, morphology, and structure upon the formation of the apatite bioactive phase on the accessible surface of the samples. These results hold promise for further development of new sorption materials, including biomaterials, for targeted drug delivery with a potential for practical application.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"22 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863663","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":"Strengthening of Spherical V2O5/TiO2−SiO2 Composites Obtained by Template Synthesis Combined with Sol-Gel Method","authors":"S. A. Kuznetsova, O. S. Khalipova, A. N. Shamsutdinova","doi":"10.1134/s0036023624700529","DOIUrl":"https://doi.org/10.1134/s0036023624700529","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This study is devoted to the preparation of strong spherical V₂O₅/TiO₂–SiO₂ composite by a combined template and sol-gel method. The composition, size, and shape of the colloidal particles in butanol sol with tetrabutoxytitanium and tetraethoxysilane have been determined. The physicochemical processes leading to the strengthening of the spherical agglomerates obtained using an anion exchanger with a gel structure have been established. Electrophoresis, small-angle X-ray scattering, and viscometry have been used to demonstrate the presence of positively charged colloidal particles of lenticular and cylindrical shape in the sol. The size of the particles, when the sol is stabilized, reaches 53 Å. The absorption of the sol by the anion exchanger in vanadium form is due to the equalization of the osmotic pressure in the anion exchanger/sol system. Spherical composites with a diameter of 300 µm have been obtained. It has been shown by X-ray powder diffraction that the composites consist of V₂O₅ with an orthorhombic structure, TiO₂ with an anatase structure, and amorphous silicon dioxide. The interaction at the interface between the phases of V₂O₅ with TiO₂ and SiO₂ has been demonstrated by IR and Raman spectroscopy. This interaction leads to the strengthening of the sphere of the V₂O₅/TiO₂–SiO₂ composite. The results obtained can be used for the synthesis of the spherical M_<i>x</i>O_<i>y</i>/TiO₂–SiO₂ composites.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"169 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863667","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 Study of Ru-Containing Catalysts on Mesostructured Carbon for Glucose Hydrogenation","authors":"Yu. N. Zaitseva, A. O. Eremina, V. V. Sychev, V. A. Golubkov, S. A. Novikova, O. P. Taran, S. D. Kirik","doi":"10.1134/s0036023624600527","DOIUrl":"https://doi.org/10.1134/s0036023624600527","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Hydrogenation catalysts based on functionalized CMK-3 (Carbon Mesostructured by KAIST) carbon material and ruthenium nanoparticles have been developed. SBA-15 mesostructured silicate with enlarged wall channels has been used as a template for the carbon replica synthesis. The effect of carbon material functionalization via humid air oxidation and sulfonation on the morphology, physicochemical properties, and activity of the catalyst has been studied. The degree of dispersion, localization, and electronic state of supported ruthenium depending on the support functionalization method have been determined. The initial support structure preservation after Ru deposition has been confirmed by a number of physicochemical methods. Metal particles are distributed over carrier surface without agglomeration, at size corresponding to mesostructure which provides high accessibility of active centers. The catalysts have been tested in the hydrogenation of glucose into sorbitol. Pore morphology and preservation of initial carbon support structure play important role in the catalytic activity of Ru particles.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"44 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141863698","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}