Р.В. Смелый, Елена Канева, А.В. Ощепкова, В.А. Бычинский, Т.С. Айсуева, А А Щетников, Г.В. Пашкова, И.С. Якимов, А.Л. Финкельштейн, R. Smelyy, E. Kaneva, A. Oshchepkova, V. Bychinskii, T. S. Aisueva, Aleksandr А. Shchetnikov, G. Pashkova, I. Yakimov, Aleksandr L. Finkelshtein
The paper reports comparison of three approaches to define the contents of minerals and mineral groups in the carbonate-silicate lake bottom sediments. The two approaches are based on the method of X-ray powder diffraction. The first one treats with the Rietveld Method in the software DIFFRAC Plus diffractometer D8 Advance (PDF-2 database). The second one uses the method of reference intensities (corundum ratios) and optimization of the model powder patterns from the X-ray phase standards of PDF-2 database and equations of the element balance with regularization of the least square functional. The third approach of physic-chemical modeling selects probable single mineral and multi-component phases through modelling the sold solutions, and it uses the data on the element composition obtained by XRF technique, as well as the data of X-ray diffraction on the qualitative mineral composition. Thirty samples of bottom sediment cores taken in the Zun-Torey Lake in East Siberia were analyzed by the three approaches described herein. The contents of mineral groups (feldspars, quartz, clay minerals and carbonates) varied within the range 10-40 mass %. The discrepancies between obtained results show the standard deviation ranging from 2 to 9 mass %. A relative standard deviation commonly provides the value below 30 %, so such determinations could be considered quantitative ones. With regard to the acquired data, it is hard to prefer this or that approach. Available data was employed to assess the error of X-ray phase powder analysis in measuring the abundance of mineral groups in the carbonate-silicate sedimentary rocks in the absence of reference materials to compare with certified mineral composition
{"title":"Determination of the Mineral Composition of the Lake Bottom Sediments by X-Ray Diffraction Method and Physico-Chemical Modelling","authors":"Р.В. Смелый, Елена Канева, А.В. Ощепкова, В.А. Бычинский, Т.С. Айсуева, А А Щетников, Г.В. Пашкова, И.С. Якимов, А.Л. Финкельштейн, R. Smelyy, E. Kaneva, A. Oshchepkova, V. Bychinskii, T. S. Aisueva, Aleksandr А. Shchetnikov, G. Pashkova, I. Yakimov, Aleksandr L. Finkelshtein","doi":"10.17516/1998-2836-0135","DOIUrl":"https://doi.org/10.17516/1998-2836-0135","url":null,"abstract":"The paper reports comparison of three approaches to define the contents of minerals and mineral groups in the carbonate-silicate lake bottom sediments. The two approaches are based on the method of X-ray powder diffraction. The first one treats with the Rietveld Method in the software DIFFRAC Plus diffractometer D8 Advance (PDF-2 database). The second one uses the method of reference intensities (corundum ratios) and optimization of the model powder patterns from the X-ray phase standards of PDF-2 database and equations of the element balance with regularization of the least square functional. The third approach of physic-chemical modeling selects probable single mineral and multi-component phases through modelling the sold solutions, and it uses the data on the element composition obtained by XRF technique, as well as the data of X-ray diffraction on the qualitative mineral composition. Thirty samples of bottom sediment cores taken in the Zun-Torey Lake in East Siberia were analyzed by the three approaches described herein. The contents of mineral groups (feldspars, quartz, clay minerals and carbonates) varied within the range 10-40 mass %. The discrepancies between obtained results show the standard deviation ranging from 2 to 9 mass %. A relative standard deviation commonly provides the value below 30 %, so such determinations could be considered quantitative ones. With regard to the acquired data, it is hard to prefer this or that approach. Available data was employed to assess the error of X-ray phase powder analysis in measuring the abundance of mineral groups in the carbonate-silicate sedimentary rocks in the absence of reference materials to compare with certified mineral composition","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":"7 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82501954","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}
Mesostructured carbon material CMK-3 for electrodes of electrochemical capacitors was obtained by the method of template synthesis. In order to increase the capacitance characteristics, impregnation of metal ions (Co, Ni, and Cu) into the structure of mesoporous carbon CMK-3 was carried out. The structure of the obtained materials was studied by X-ray diffraction and gas adsorption. The study by TEM showed that highly dispersed, nanosized particles are metal oxides Co, Ni and Cu with the size of 30-50 nm. The particles are uniformly distributed inside the carbon material. Electrochemical characteristics were studied in aqueous electrolytes (1M KCl and 1M KOH). It has been established that the impregnation of metal ions increases in the specific capacity of the mesoporous carbon material by about 30 % (from 110 to 156 F/g) in KOH
{"title":"Synthesis and Electrochemical Properties of CMK-3 with Particles of Nickel, Cobalt and Copper","authors":"Yulia N. Zaitseva, S. Novikova, V. Parfenov","doi":"10.17516/1998-2836-0136","DOIUrl":"https://doi.org/10.17516/1998-2836-0136","url":null,"abstract":"Mesostructured carbon material CMK-3 for electrodes of electrochemical capacitors was obtained by the method of template synthesis. In order to increase the capacitance characteristics, impregnation of metal ions (Co, Ni, and Cu) into the structure of mesoporous carbon CMK-3 was carried out. The structure of the obtained materials was studied by X-ray diffraction and gas adsorption. The study by TEM showed that highly dispersed, nanosized particles are metal oxides Co, Ni and Cu with the size of 30-50 nm. The particles are uniformly distributed inside the carbon material. Electrochemical characteristics were studied in aqueous electrolytes (1M KCl and 1M KOH). It has been established that the impregnation of metal ions increases in the specific capacity of the mesoporous carbon material by about 30 % (from 110 to 156 F/g) in KOH","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89339999","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}
Denis A. Feofanov, Maxim Yu. Penin, Oleg A. Epov, P. V. Fabinskii
The process of complexation of silver (I) ions with 18-crown-6 ether in some polar water-aproton solvents at a constant temperature of 308К was studied by direct potentiometric titration. The stability constants of the resulting complex are determined depending on the molar fraction from 0.2 to 0.8 dimethylsulfoxide and dimethylformamide in the composition of the mixed solvent. It is shown that, despite the same nature of the co-solvents, they have the opposite effect on the stability constant of the complex due to the instability of DMF in an acidic medium and when heated. It is noted that the studied reaction is exothermic and the temperature increase reduces the stability of the studied complexes
{"title":"The Complexation of Silver (I) ion with 18-Crown-6 Ether in Water and Some Polar Aprotic Solvents","authors":"Denis A. Feofanov, Maxim Yu. Penin, Oleg A. Epov, P. V. Fabinskii","doi":"10.17516/1998-2836-0134","DOIUrl":"https://doi.org/10.17516/1998-2836-0134","url":null,"abstract":"The process of complexation of silver (I) ions with 18-crown-6 ether in some polar water-aproton solvents at a constant temperature of 308К was studied by direct potentiometric titration. The stability constants of the resulting complex are determined depending on the molar fraction from 0.2 to 0.8 dimethylsulfoxide and dimethylformamide in the composition of the mixed solvent. It is shown that, despite the same nature of the co-solvents, they have the opposite effect on the stability constant of the complex due to the instability of DMF in an acidic medium and when heated. It is noted that the studied reaction is exothermic and the temperature increase reduces the stability of the studied complexes","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":"44 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73359422","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}
V. Kuvshinov, L. Altunina, L. A. Stasieva, I. Kuvshinov
The results of theoretical and experimental studies of the acidity of donor-acceptor complexes of boric acid with polyols – glycerol and sorbitol, which were used in the development of oil-displacing compositions, are presented. A model of donor-acceptor acid-base equilibria in coordinating polyol solvents has been created, due to which the constants of polyolboric acids formation and ionization were determined by pH-meter and electrical conductivity methods. The obtained constant values were used to calculate the compositions buffer capacity. Due to the using a mixture of polyolboric acids in the compositions at various ratios it was possible to regulate the range of the buffer action
{"title":"Acidity Study of Donor-Acceptor Complexes of Boric Acid with Polyols for Oil Displacing Compositions","authors":"V. Kuvshinov, L. Altunina, L. A. Stasieva, I. Kuvshinov","doi":"10.17516/1998-2836-0133","DOIUrl":"https://doi.org/10.17516/1998-2836-0133","url":null,"abstract":"The results of theoretical and experimental studies of the acidity of donor-acceptor complexes of boric acid with polyols – glycerol and sorbitol, which were used in the development of oil-displacing compositions, are presented. A model of donor-acceptor acid-base equilibria in coordinating polyol solvents has been created, due to which the constants of polyolboric acids formation and ionization were determined by pH-meter and electrical conductivity methods. The obtained constant values were used to calculate the compositions buffer capacity. Due to the using a mixture of polyolboric acids in the compositions at various ratios it was possible to regulate the range of the buffer action","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":"25 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90200619","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}
Nonionic ethoxylated surfactants, including ethoxylated nonylphenols, can be considered as neutral oxygen-containing extraction reagents, the formation of delamination systems with which is possible when salting-out with inorganic salts. In this work, the distribution of halide and thiocyanate acid complexes of thallium (III), iron (III), indium and gallium in the water – ethoxylated nonylphenol (neonol AF 9-12) – ammonium sulfate system at 25°C was investigated. It is established that thallium (III) is quantitatively extracted in the form of tetrahalidetallate-ion with an acidity of more than 0.1 mol/l, extraction of other metals is not quantitative. Among the thiocyanate acid complexes, zinc, cobalt and copper (II) are quantitatively concentrated, which can be used for group concentration of these metals or their extraction-spectrophotometric determination methods
非离子型乙氧基化表面活性剂，包括乙氧基化壬基酚，可以被认为是中性含氧萃取试剂，当用无机盐盐化时，可以形成分层体系。本文研究了铊(III)、铁(III)、铟和镓的卤化物和硫氰酸配合物在25℃水-乙氧基化壬基酚(neonol AF 9-12) -硫酸铵体系中的分布。确定铊(III)以四卤化物离子形式定量提取，酸度大于0.1 mol/l，其他金属不能定量提取。硫氰酸配合物中对锌、钴、铜(II)进行了定量浓缩，可用于这些金属的基团浓度或它们的萃取-分光光度测定方法
{"title":"Halide and Thiocyanate Metal Acid Complexes Extraction in the Water – Ethoxylated Nonylphenol – Ammonium Sulfate System","authors":"A. Stankova, A. Elokhov, A. E. Lesnov","doi":"10.17516/1998-2836-0130","DOIUrl":"https://doi.org/10.17516/1998-2836-0130","url":null,"abstract":"Nonionic ethoxylated surfactants, including ethoxylated nonylphenols, can be considered as neutral oxygen-containing extraction reagents, the formation of delamination systems with which is possible when salting-out with inorganic salts. In this work, the distribution of halide and thiocyanate acid complexes of thallium (III), iron (III), indium and gallium in the water – ethoxylated nonylphenol (neonol AF 9-12) – ammonium sulfate system at 25°C was investigated. It is established that thallium (III) is quantitatively extracted in the form of tetrahalidetallate-ion with an acidity of more than 0.1 mol/l, extraction of other metals is not quantitative. Among the thiocyanate acid complexes, zinc, cobalt and copper (II) are quantitatively concentrated, which can be used for group concentration of these metals or their extraction-spectrophotometric determination methods","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":"62 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74590658","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}
An interaction of potassium buthylxanthate and of dibuthyldixanthogen with metallic Ti, stainless steel and α-TiO2 surfaces was studied. Contact angle measurements by sessile drop technique showed that the treatment of initial substrate surfaces with potassium buthylxanthate aqueous solution or with dibuthyldixanthogen emulsion render them more hydrophobic. Using in situ atomic force spectroscopy, the sorption of surface active substances was shown to give rise to an increase in both adhesive force magnitude and the range within it acts at the approach of cantilever tip to the surface of both hydrophobic and hydrophilic samples. The maximum of both adhesive force and their range, up to 150 nm, took place in case of retract of cantilever tip from sample surface. Force curves are steeper, which related with the formation of nanobubbles on the surfaces of samples under study arising the longrange hydrophobic force of capillary origin. Dibuthyldixanthogen exhibited highly-active reagent properties inducing the formation of nanoscale gas structures on both hydrophobic and, in less extent, hydrophilic surfaces
{"title":"A Comparative Study of Features of Sorption of N-Buthylxanthate and Dibuthyldixanthogen Onto Metallic Supports and Rutile Using in situ Atomic Force Spectroscopy","authors":"A. Karacharov, M. Likhatski","doi":"10.17516/1998-2836-0131","DOIUrl":"https://doi.org/10.17516/1998-2836-0131","url":null,"abstract":"An interaction of potassium buthylxanthate and of dibuthyldixanthogen with metallic Ti, stainless steel and α-TiO2 surfaces was studied. Contact angle measurements by sessile drop technique showed that the treatment of initial substrate surfaces with potassium buthylxanthate aqueous solution or with dibuthyldixanthogen emulsion render them more hydrophobic. Using in situ atomic force spectroscopy, the sorption of surface active substances was shown to give rise to an increase in both adhesive force magnitude and the range within it acts at the approach of cantilever tip to the surface of both hydrophobic and hydrophilic samples. The maximum of both adhesive force and their range, up to 150 nm, took place in case of retract of cantilever tip from sample surface. Force curves are steeper, which related with the formation of nanobubbles on the surfaces of samples under study arising the longrange hydrophobic force of capillary origin. Dibuthyldixanthogen exhibited highly-active reagent properties inducing the formation of nanoscale gas structures on both hydrophobic and, in less extent, hydrophilic surfaces","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":"1 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83393565","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}
The narrow fractions of microspheres with a size of −0.4 + 0.2 mm with a low bulk density in the range of 0.34–0.64 g/cm3 were separated from cenosphere concentrates of fly ashes and fly ash from local selection obtained from pulverized coal combustion. The main components of the chemical composition in obtained narrow fractions are SiO2 – 55–66 and Al2O3 – 21–40 wt. %. The part of amorphous glass phase are 63–93, the mullite phase are 1–34, the quartz phase are 2–8 and the calcite phase are 0–1 wt. %. It is found that microspheres, characterized by maximum values of bulk density 0.64 g/cm3 and apparent thickness of the shell 20 μm, has the best strength properties. The successive twofold compressive loading the particles by increased strength were selected, for which the values of bulk density and apparent shell thickness increased to 0.86 g/cm3 and 29 μm, respectively. It is shown that the spheres with the single-ring structure are primarily subjected to destruction; the particles with network and solid structure provide improved strength characteristics of narrow fractions of microspheres
{"title":"Characteristics of the Narrow Fractions of Fly Ash Microspheres as the Basis of Light-Weight High-Strength Materials","authors":"E. S. Rogovenko, O. A. Kushnerova, E. Fomenko","doi":"10.17516/1998-2836-0123","DOIUrl":"https://doi.org/10.17516/1998-2836-0123","url":null,"abstract":"The narrow fractions of microspheres with a size of −0.4 + 0.2 mm with a low bulk density in the range of 0.34–0.64 g/cm3 were separated from cenosphere concentrates of fly ashes and fly ash from local selection obtained from pulverized coal combustion. The main components of the chemical composition in obtained narrow fractions are SiO2 – 55–66 and Al2O3 – 21–40 wt. %. The part of amorphous glass phase are 63–93, the mullite phase are 1–34, the quartz phase are 2–8 and the calcite phase are 0–1 wt. %. It is found that microspheres, characterized by maximum values of bulk density 0.64 g/cm3 and apparent thickness of the shell 20 μm, has the best strength properties. The successive twofold compressive loading the particles by increased strength were selected, for which the values of bulk density and apparent shell thickness increased to 0.86 g/cm3 and 29 μm, respectively. It is shown that the spheres with the single-ring structure are primarily subjected to destruction; the particles with network and solid structure provide improved strength characteristics of narrow fractions of microspheres","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":"55 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81015673","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}
A. Levdansky, A. Kondrasenko, Y. Malyar, V. Levdansky, B. Kuznetsov
The analysis of the literature on the spectral methods of lignins study was carried out. The most suitable spectral methods for elucidating the structural features of soluble organosolv lignins were selected. The possibilities of FTIR, 1Н NMR, 13С NMR and 2D HSQC NMR methods were demonstrated on the example of studying the structure of ethanollignins obtained from fir and aspen wood. It was established that fir and aspen lignins are G type and GS type lignins, respectively. The HSQC spectra analysis demonstrated a presence of β–O–4′, β–β′, β–5′ linkages in the ethanollignins. It was found that β–O–4′ linkages in ethanollignins from fir and aspen were partially acylated with ethoxy groups in the α-position
{"title":"Study of Organosolv Lignins by Methods of FTIR and NMR Spectroscopy","authors":"A. Levdansky, A. Kondrasenko, Y. Malyar, V. Levdansky, B. Kuznetsov","doi":"10.17516/1998-2836-0119","DOIUrl":"https://doi.org/10.17516/1998-2836-0119","url":null,"abstract":"The analysis of the literature on the spectral methods of lignins study was carried out. The most suitable spectral methods for elucidating the structural features of soluble organosolv lignins were selected. The possibilities of FTIR, 1Н NMR, 13С NMR and 2D HSQC NMR methods were demonstrated on the example of studying the structure of ethanollignins obtained from fir and aspen wood. It was established that fir and aspen lignins are G type and GS type lignins, respectively. The HSQC spectra analysis demonstrated a presence of β–O–4′, β–β′, β–5′ linkages in the ethanollignins. It was found that β–O–4′ linkages in ethanollignins from fir and aspen were partially acylated with ethoxy groups in the α-position","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":"18 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79076743","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}
A heterogeneous doping method was used for the first time to modify the transport properties of the oxygen-ion conductor La(2)Mo(2)O(9). The effect of temperature and oxygen partial pressure in the gas phase on conductivity of the obtained composite {0.85La2Mo2O9–0.15La2Mo3O12} was studied. Introduction of 15 mol. % an inert low-conductive additional phase La(2)Mo(3)O(12) results in an increase in conductivity of the matrix phase by nearly 1 orders of magnitude. It is associated with appearance of a composite effect. However, there is no suppression of the α-La(2)Mo(2)O(9)↔β-La(2) Mo(2)O(9) phase transition. It is shown that the conductivity type of both lanthanum dimolybdate and composite based on it is predominantly ionic in the wide range of oxygen partial pressures
{"title":"The Effect of Heterogeneous Doping on Transport Properties of Lanthanum Dimolybdate","authors":"G. Partin, I. Animitsa, N. Kochetova","doi":"10.17516/1998-2836-0120","DOIUrl":"https://doi.org/10.17516/1998-2836-0120","url":null,"abstract":"A heterogeneous doping method was used for the first time to modify the transport properties of the oxygen-ion conductor La(2)Mo(2)O(9). The effect of temperature and oxygen partial pressure in the gas phase on conductivity of the obtained composite {0.85La2Mo2O9–0.15La2Mo3O12} was studied. Introduction of 15 mol. % an inert low-conductive additional phase La(2)Mo(3)O(12) results in an increase in conductivity of the matrix phase by nearly 1 orders of magnitude. It is associated with appearance of a composite effect. However, there is no suppression of the α-La(2)Mo(2)O(9)↔β-La(2) Mo(2)O(9) phase transition. It is shown that the conductivity type of both lanthanum dimolybdate and composite based on it is predominantly ionic in the wide range of oxygen partial pressures","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":"109 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79257850","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}
E. V. Dokuchits, A. N. Tafilevich, N. V. Shtertser, T. Minyukova
Regularities of formation of LaCoO3 oxide with a perovskite-type structure from precursors obtained by the citrate method and the original deposition method under conditions of mild hydrothermal synthesis using organic templates: ethylene glycol, D-glucose, D-galactose and D-fructose are considered. The proposed method of synthesis provides the necessary homogenization of cations in the resulting precursor compound and the homogeneous nature of the oxide compound. The absence at the final stage of the synthesis of reducing conditions makes it possible to further modify the formed perovskite with noble metals
{"title":"Synthesis of LaCoO₃in Mild Hydrothermal Conditions","authors":"E. V. Dokuchits, A. N. Tafilevich, N. V. Shtertser, T. Minyukova","doi":"10.17516/1998-2836-0117","DOIUrl":"https://doi.org/10.17516/1998-2836-0117","url":null,"abstract":"Regularities of formation of LaCoO3 oxide with a perovskite-type structure from precursors obtained by the citrate method and the original deposition method under conditions of mild hydrothermal synthesis using organic templates: ethylene glycol, D-glucose, D-galactose and D-fructose are considered. The proposed method of synthesis provides the necessary homogenization of cations in the resulting precursor compound and the homogeneous nature of the oxide compound. The absence at the final stage of the synthesis of reducing conditions makes it possible to further modify the formed perovskite with noble metals","PeriodicalId":16999,"journal":{"name":"Journal of Siberian Federal University. Chemistry","volume":"108 1","pages":""},"PeriodicalIF":0.4,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84666381","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}
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