Proceedings of the National Academy of Sciences of Belarus, Chemical Series最新文献_第4页

Mobile oxygen in layered nickelates of perovskite-type 钙钛矿型层状镍酸盐中的流动氧

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2023-06-03 DOI: 10.29235/1561-8331-2023-59-2-95-104

A. Usenka, I. Kharlamova, L. Makhnach, V. Pankov, E. Korobko

{"title":"Mobile oxygen in layered nickelates of perovskite-type","authors":"A. Usenka, I. Kharlamova, L. Makhnach, V. Pankov, E. Korobko","doi":"10.29235/1561-8331-2023-59-2-95-104","DOIUrl":"https://doi.org/10.29235/1561-8331-2023-59-2-95-104","url":null,"abstract":"The influence of the different types of oxygen on the structure and electrical conductivity of the perovskite-type nickelates were investigated. The nickelates La2NiO4+δ, La0,6Sr1,4NiO4–δ, Sr3Al0,75Ni1,25O7–δ were synthesised using the solidstate reaction route. Phase composition was determined by X-ray powder diffraction analysis. The iodometric titration technique was used to specify the oxygen content of the powders. Oxygen desorption and absorption, including oxygen index variation, were investigated by oxygen solid electrolyte coulometry (OSEC). Electroconductive properties of samples were studied by a standard DC four-point method. Utilizing OSEC technique, three mobile and one regular type of oxygen were observed in the perovskite layered nickelates with P/RS and 2P/RS structure. These four types of mobile oxygen differ in the binding energy to the crystal lattice and crystallographic positions. The desorption-sorption processes of various types of mobile oxygen have different effects on the thermal expansion of crystal lattice parameters. The regular oxygen, occupying the apex of octahedron, affects the lattice parameters most prominently. This type of oxygen changes the character of the temperature dependence of specific resistivity sufficiently. Interstitial oxygen does not yield such anomalies. ","PeriodicalId":20798,"journal":{"name":"Proceedings of the National Academy of Sciences of Belarus, Chemical Series","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73344523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Catalytic activity of Co, Cu and Mn oxide catalysts synthesized by the sol-gel combustion method in the low-temperature oxidation of carbon oxide 溶胶-凝胶燃烧法合成的Co、Cu和Mn氧化物催化剂在低温氧化氧化碳中的催化活性

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2023-06-03 DOI: 10.29235/1561-8331-2023-59-2-105-114

S. Zulfugarova, G. Azimova, Z. F. Aleskeroiva, G. M. Guseinli, D. Tagiyev

{"title":"Catalytic activity of Co, Cu and Mn oxide catalysts synthesized by the sol-gel combustion method in the low-temperature oxidation of carbon oxide","authors":"S. Zulfugarova, G. Azimova, Z. F. Aleskeroiva, G. M. Guseinli, D. Tagiyev","doi":"10.29235/1561-8331-2023-59-2-105-114","DOIUrl":"https://doi.org/10.29235/1561-8331-2023-59-2-105-114","url":null,"abstract":"The synthesis of catalysts based on cobalt, copper and manganese oxides by sol-gel method with combustion was carried out, and their catalytic activity was studied in the reaction of low-temperature oxidation of carbon monoxide to dioxide. Oxides of cobalt, copper and manganese, as well as their double oxides (Co–Mn, Cu–Mn and Co–Cu) were synthesized. X-ray phase analysis showed the formation of manganites and oxides of corresponding metals in the Co–Mn and Cu–Mn systems. It was revealed that in the Co–Cu system only oxides of separate metals are formed. It was found that cobaltmanganese and copper-manganese oxide systems synthesized by sol-gel combustion method exhibit high catalytic activity in the low-temperature (110–140 0C) conversion of carbon monoxide into dioxide. One-step synthesis of Cu–Mn/Al2O3 catalytic system was also carried out by sol-gel method with burning precursors with binder hydrogel (Al2O3), and its high activity in low-temperature conversion of carbon monoxide was revealed. The catalytic systems were investigated by X-ray diffraction, IR spectral methods, BET, SEM. The results obtained show the possibility of obtaining active multicomponent oxide catalysts in low-temperature oxidation of carbon monoxide by technologically simple sol-gel combustion method. ","PeriodicalId":20798,"journal":{"name":"Proceedings of the National Academy of Sciences of Belarus, Chemical Series","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77786962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Characteristics of hollow glass microspheres and design of light polymer composite materials of different composition and dispersed structure 中空玻璃微球的特性及不同组成和分散结构的轻聚合物复合材料的设计

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2023-03-07 DOI: 10.29235/1561-8331-2023-59-1-56-66

A. Trofimov, I. D. Simonov-Emelyanov, S. I. Shalgunov, I. V. Sokolov, X. I. Kharlamova, E. R. Dergunova, A. Pykhtin

引用次数: 0

Hydrophobization and strengthening of cellulose materials from secondary resources 二次资源纤维素材料的疏水性和强化

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2023-03-07 DOI: 10.29235/1561-8331-2022-58-4-67-77

K. Babakhanova, A. A. Sadriddinov, D. Abdiraxmanova, I. Ismailov, M. Babakhanova

{"title":"Hydrophobization and strengthening of cellulose materials from secondary resources","authors":"K. Babakhanova, A. A. Sadriddinov, D. Abdiraxmanova, I. Ismailov, M. Babakhanova","doi":"10.29235/1561-8331-2022-58-4-67-77","DOIUrl":"https://doi.org/10.29235/1561-8331-2022-58-4-67-77","url":null,"abstract":"The influence of the sizing agent and filler on the physical-mechanical and surface properties of paper from the cellulose mass of the inner layer of the bark of mulberry tree branches has been studied. According to standard methods, the mechanical strength and absorbency were studied. Surface absorbency for one-side wetting was determined by the method of Cobb(30), by determining the mass of water absorbed by the paper surface when wetting one side of the test sample. It was found that it is advisable to add a sizing agent in the range from 1 to 1.5 g per 100 g of dry cellulose raw materials, since an increase in the additive to 2 g helps to reduce the interfiber bonding forces by 21 %. The addition of 6 g of kaolin affects the distance between the fibers, which reduces the mechanical adhesive forces by 12.5 %. During the analysis of the surface properties of paper samples, the sizing efficiency was found to be from 22.5 to 30 % with an increase in the addition of sizing glue, which can be explained by densification of the structure, which prevents the penetration of aqueous solutions. The addition of 2 to 6 g of kaolin also increases water resistance from 17.5 to 25 %. With the help of a mathematical model, rational values of absorbency were revealed with a composition of 92 %, with a sizing agent of 1.5 g and an amount of filler of 4 g. The resulting mathematical model can be used as the basis for controlling the surface characteristics of paper during its production.","PeriodicalId":20798,"journal":{"name":"Proceedings of the National Academy of Sciences of Belarus, Chemical Series","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86708953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Heating value of agricultural biomass: the basic value and intervals for certain types 农业生物质热值:某些类型的基本值和区间

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2023-03-07 DOI: 10.29235/1561-8331-2023-59-1-78-88

Yuri Maksimuk, V. Kursevich, A. Korsakova, M. V. Antonova, V. Krouk

引用次数: 0

137Cs, 85Sr and 60Co sorption from model solutions of low activity liquid radioactive waste by modified oil shale 改性油页岩对低活度放射性废液模型溶液中137Cs、85Sr和60Co的吸附

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2023-03-07 DOI: 10.29235/1561-8331-2023-59-1-49-55

K. E. Zaruba-Venhlinskaya, T. L. Shubarava, A. Radkevich, T. F. Kouznetsova, A. Ivanets

{"title":"137Cs, 85Sr and 60Co sorption from model solutions of low activity liquid radioactive waste by modified oil shale","authors":"K. E. Zaruba-Venhlinskaya, T. L. Shubarava, A. Radkevich, T. F. Kouznetsova, A. Ivanets","doi":"10.29235/1561-8331-2023-59-1-49-55","DOIUrl":"https://doi.org/10.29235/1561-8331-2023-59-1-49-55","url":null,"abstract":"The results of the study of cesium, strontium, cobalt radionuclides sorption from model solutions simulating liquid radioactive waste on promising sorbents based on thermally modified oil shale are presented. The dependency of texture parameters obtained from the results of nitrogen adsorption-desorption on the treatment method of oil shale and their relationship to sorption parameters such as distribution coefficient and removal efficiency was discussed. Understanding how pore characteristics affect the sorption activity of such complex systems as sorbents is important for the creation of radionuclide sorption materials with improved characteristics. The efficiency of sorption of cesium, strontium and cobalt radionuclides was rather high for sorbent samples: the distribution coefficient was about 103–104 ml/g with a removal efficiency of more than 66 %. The most effective sorbent was obtained from oil shale with a heating rate of 5 deg/min without subsequent steam treatment, which is recommended to be used for low-active radioactive waste treatment.","PeriodicalId":20798,"journal":{"name":"Proceedings of the National Academy of Sciences of Belarus, Chemical Series","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86133615","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In silico Rivaroxaban binding affinity to β-ketoacyl[ACP]synthase I: search for new pharmacophore 利伐沙班与β-酮酰[ACP]合成酶I的结合亲和力:寻找新的药效团

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2023-03-05 DOI: 10.29235/1561-8331-2023-59-1-42-48

T. Lakhvich, V. M. Ryneiskaya

{"title":"In silico Rivaroxaban binding affinity to β-ketoacyl[ACP]synthase I: search for new pharmacophore","authors":"T. Lakhvich, V. M. Ryneiskaya","doi":"10.29235/1561-8331-2023-59-1-42-48","DOIUrl":"https://doi.org/10.29235/1561-8331-2023-59-1-42-48","url":null,"abstract":"The activity of Rivaroxaban as a representative of oxazolidinone series in relation to β-ketoacyl[ACP]synthase I has been studied in silico. Using the molecular docking methods, the binding sites of Rivaroxaban with protein have been identified. For the site providing the highest affinity of Rivaroxaban with protein (-10.26 kcal/mol), 4 clusters characterized by a number of runs greater than 15 have been analyzed. It was found that the specific position of the ligand within these clusters can be changed via mechanism providing a physiological response. Slight changes in the characteristics of the environment can lead to a transition from an energetically dominant position (BE = –10.26 kcal/mol) with predominantly hydrophobic interactions to another position (BE = –8.88 kcal/mol) with predominantly hydrophilic interactions. Dynamic transition discussed may cause a physiological response. The results of the study with a high degree of probability confirm the implementation of a specific mechanism of antimycobacterial action of Rivaroxaban through inhibition of the mycolate biosynthesis.","PeriodicalId":20798,"journal":{"name":"Proceedings of the National Academy of Sciences of Belarus, Chemical Series","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78154146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of water content and storage conditions on the activity of PdCuFe-containing fibrous carbon catalyst for low-temperature CO oxidation 含水量和贮存条件对含pdcufe纤维炭催化剂低温CO氧化活性的影响

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2023-03-05 DOI: 10.29235/1561-8331-2023-59-1-7-17

S. G. Khaminets, S. V. Matveichuk, L. Tychinskaya

{"title":"Effect of water content and storage conditions on the activity of PdCuFe-containing fibrous carbon catalyst for low-temperature CO oxidation","authors":"S. G. Khaminets, S. V. Matveichuk, L. Tychinskaya","doi":"10.29235/1561-8331-2023-59-1-7-17","DOIUrl":"https://doi.org/10.29235/1561-8331-2023-59-1-7-17","url":null,"abstract":"Effect of water content and storage conditions on the activity of carbon fiber supported palladium-copper-iron containing catalyst was studied. Physical-chemical properties of catalytic system were examined by means of XRD, XPS, SEM and GCh. The optimal water content in the catalyst, which ensures the most effective air purification both at low (0,03 vol.%) and high (0,5 vol.%) CO concentrations in the air and high humidity (70 %) of gas mixture, was determined.Activity loss of the catalytic system after storage under air conditions (1 month) was attributed to the accumulation of the excess amount of water in the catalyst and reorganization of its the active phase – decrease in the palladium content in the near-surface layer and segregation of the Сu2Cl(OH)3 atacamite phase. Catalyst drying in air at 110 оС leads to its complete reactivation. Hermetically sealed freshly as-prepared and dried at 50 оС after experiment samples retain the initial catalytic activity during long-term (more than a year) storage.","PeriodicalId":20798,"journal":{"name":"Proceedings of the National Academy of Sciences of Belarus, Chemical Series","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78191141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis of new imides and imidoamides of citraconopimaric acid 柠檬酸新亚胺及胺酰胺的合成

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2023-03-05 DOI: 10.29235/1561-8331-2023-59-1-35-41

M. P. Bei, A. P. Yuvchenko

{"title":"Synthesis of new imides and imidoamides of citraconopimaric acid","authors":"M. P. Bei, A. P. Yuvchenko","doi":"10.29235/1561-8331-2023-59-1-35-41","DOIUrl":"https://doi.org/10.29235/1561-8331-2023-59-1-35-41","url":null,"abstract":"For the first time, a method has been developed for the synthesis of aromatic imides of citraconopimaric acid by the interaction of primary aromatic amines (aniline, p-toluidine) and citraconopimaric acid in p-xylene at reflux. New aliphatic imides have been synthesized by the reaction of citraconopimaric acid and primary aliphatic amines (octyl-, octadecylamine) in a melt at 125–150°C. For the first time, the synthesis of citraconopimaric acid imidoamides was developed by treating citraconopimaric acid N-octylimide with thionyl chloride and subsequent reaction of the resulting acid chloride with primary aromatic amines (aniline, p-bromoaniline). A method has been developed for the synthesis of aliphatic imides of the rosin-citraconic adduct (in the form of technical products) by its interaction with primary aliphatic amines (octyl- and octadecylamine) at 180–200°C for 8–12 hours.Together with Belarusian state technological university, the relationship between the structure of imides of rosin-citraconic adducts as modifiers of unfilled and filled industrial rubber compounds was studied, and the obtained additives were found to improve the technological properties of compositions while maintaining, and in some cases improving physical and mechanical parameters (increasing the resistance of compositions to thermal aging, bond strength of the cord with rubber, etc.).","PeriodicalId":20798,"journal":{"name":"Proceedings of the National Academy of Sciences of Belarus, Chemical Series","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78777508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of polymer and inorganic modifiers on the process of phase formation in potassium sulfate saturated solutions 聚合物和无机改性剂对硫酸钾饱和溶液中相形成过程的影响

Proceedings of the National Academy of Sciences of Belarus, Chemical Series Pub Date : 2023-03-05 DOI: 10.29235/1561-8331-2023-59-1-18-25

D. V. Сherednichenko, P. Vorobiev, V. V. Shevchuk, A. Vorobiev, T. N. Potkina, E. V. Layevskaya

引用次数: 0