B 33 Bazuev, G. V. Synthesis and magnetic properties of incommensurate phases A4CuMn2O9 (A = Ca, Sr) [] = Synthesis and magnetic properties of incommensurate phases A4CuMn2O9 (A = Ca, Sr) / G. V. Bazuev, V. N. Krasil'nikov, D. G. Kellerman // Journal of Alloys and Compounds. - 2003. - V. 352. - С. 190-196. - Bibliogr.: p. 195-196 (26 ref.) . - ISSN 0925-8388 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): CuO -- MnO2 -- CaMnO3 -- Ca4CuMn2O9 -- ТВЕРДОФАЗНЫЙ СИНТЕЗ -- СИНТЕЗ ТВЕРДОФАЗНЫЙ -- Sr4CuMn2O9 -- Ca4CuMn2O9 -- Cu -- Mn -- МЕДЬ -- МАРГАНЕЦ -- Ca -- Sr -- КАЛЬЦИЙ -- СТРОНЦИЙ -- СЛОЖНЫЕ ОКСИДЫ -- ОКСИДЫ СЛОЖНЫЕ -- МАГНИТНЫЕ СВОЙСТВА -- СВОЙСТВА МАГНИТНЫЕ -- КАРБОНАТЫ -- МАНГАНИТ КАЛЬЦИЯ Аннотация: New complex oxides A4CuMn2O9 (A = Ca and Sr) belonging to the family of quasi-one-dimensional compounds have been obtained by solid-phase synthesis from Ca and Sr carbonates and oxides CuO and MnO2. It was established that both oxides are incommensurate and can be characterized by two sublattice with the same a, but different c (c1 and c2) parameters. Magnetic susceptibility measurement results were interpreted with allowance for exchange-bound dimers Mn(4+)-Mn(4+) and paramagnetic centers Cu(2+). Magnetic measurements revealed the presence of calcium manganate CaMnO3 in Ca4CuMn2O9 |
K 81 Krasil'nikov, V. N. Synthesis of fine and nanosized oxide materials, using metal carboxylates and products of their chemical modification by ethylene glycol as precursors [Текст] / V. N. Krasil'nikov, O. I. Gyrdasova, G. V. Bazuev // Izvestiya Rossiiskoi Akademii Nauk, Seriya Fizicheskaya. - 2006. - Vol. 70, № 7. - С. 988-991 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
E 27 Effect of ethylene glycol on the formation of extended crystals of M1/3Co2/3C2O4·2H2O (M = Zn, Mn) oxalates and their thermolysis products [Текст] / O. I. Gyrdasova, V. N. Krasil'nikov, I. G. Grigorov, G. V. Bazuev // Zhurnal Neorganicheskoi Khimii. - 2006. - Vol. 51, № 6. - С. 1020-1026 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
S 98 Synthesis, crystal structure, and vibrational spectra of cesium dioxovanadium(V) sulfate CsVO2SO4 [Текст] / V. G. Zubkov, A. P. Tyutyunnik, V. N. Krasil'nikov, I. F. Berger, L. A. Perelyaeva, I. V. Baklanova, V. G. Bamburov // Doklady Chemistry. - 2007. - Vol. 415, № 1. - С. 172-175. - Библиогр. : с. 175 (9 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Полный текст |
K 81 Krasil'nikov, V. N. Phase relations in the K2O-V2O5-V2O4-SO3 system in the range of high concentrations of sulfur trioxide [Текст] / V. N. Krasil'nikov, V. G. Bamburov // Doklady Chemistry. - 2007. - Vol. 416, № 2. - С. 247-250. - Библиогр. : с. 250 (15 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Полный текст |
K 81 Krasil'nikov, V. N. Phase ratios in the K2O-V2O4-SO3 system at high sulfur trioxide concentrations [Текст] / V. N. Krasil'nikov // Zhurnal Neorganicheskoi Khimii. - 2007. - Vol. 52, № 2. - С. 301-305 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
K 81 Krasil'nikov, V. N. Loss of activity by vanadium sulfuric acid catalysts under the action of arsenic(III) oxide vapor [Text] / V. N. Krasil'nikov, A. P. Shtin, V. I. Malkiman // Russian Journal of Applied Chemistry. - 2006. - Vol. 79, № 4. - P619-623 : il. - Bibliogr. : p. 623 (12 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): КАТАЛИЗАТОРЫ -- ВАНАДИЕВЫЕ КАТАЛИЗАТОРЫ -- СЕРНАЯ КИСЛОТА -- ОКСИД МЫШЬЯКА Аннотация: Chemical processes leading to inactivation of vanadium sulfuric acid catalysts by arsenic(III) oxide vapor were studied. The interaction and solubility in the system VO(H2AsO4)2-VOAsO4-H3AsO4 -H2O and the composition of oxovanadium arsenate in a mixed oxidation state, used as a starting substance in synthesis of (VIVO)(VVO)2(As2O7)2, were examined Полный текст |
K 81 Krasil'nikov, V. N. Current range of lecithins used as food additives [Текст] / V. N. Krasil'nikov, E. B. Fedorova, Yu. A. Timoshenko // Pishchevaya Promyshlennost . - 2005. - № 5. - С. 24-27 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
S 98 Synthesis and Study of Photocatalytic Activity of Nanoscale Quasi-One-Dimensional Ti1 – xVxO2 (0 ≤ x ≤ 0.13) and Zn1 – xCoxO (0 ≤ x ≤ 0.3) Oxides / O. I. Gyrdasova, V. N. Krasil'nikov, G. V. Bazuev, L. Yu. Buldakova, M. Yu. Yanchenko // Bulletin of the Russian Academy of Sciences: Physics. - 2009. - Vol. 73, № 8. - P. 1113-1116 : il. - Bibliogr. : p. 1116 (10 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ФОТОКАТАЛИТИЧЕСКАЯ АКТИВНОСТЬ -- ОКСИВАНАДАТ ТИТАНА -- ОКСИКОБАЛЬТИТ ЦИНКА Аннотация: A original method of synthesis of quasi one dimensional Ti1 – xVx(OCH2CH2O)2 (0 ≤ x ≤ 0.13) and Zn1 – xCox(HCOO)(HOCH2CH2O) (0 ≤ x ≤ 0.3) has been developed. The synthesis products were used as a basis for nanoscale extended Ti1 – xVxO2 and Zn1 – xCoxO oxides. The compounds obtained and products of their thermolysis were investigated by X ray diffraction, microscopy, IR spectroscopy, thermogravimetry, and chemical analysis; the shape and size of particles were determined by scanning electron microscopy. The good prospects of Ti1 – xVxO2 and Zn1 – xCoxO solid solutions as photocatalysts for hydroquinone oxidation are shown \\\\Expert2\\nbo\\Bulletin of the Russian Academy of Sciences Physics\\2009, V. 73, N 8, P. 1113-1116.pdf |
S 98 Synthesis, Microstructure, and Photocatalytic Characteristics of Quasi One Dimensional Zinc Oxide Doped with d Elements / O. I. Gyrdasova, V. N. Krasil'nikov, E. V. Shalaeva, L. Yu. Buldakova, M. Yu. Yanchenko, V. G. Bamburov // Doklady Chemistry. - 2010. - Vol. 434, № 1. - P. 211-213 : il. - Bibliogr. : p. 113 (9 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ФОТОКАТАЛИЗ -- ОКСИД ЦИНКА -- СИНТЕЗ -- МИКРОСТРУКТУРА |
T 44 Thermally Stimulated Transformation of Micellar Tungsten Glycolate into Nanodisperse Tungsten Carbide / E. V. Polyakov, L. G. Maksimova, V. N. Krasil'nikov, V. A. Zhilyaev, T. A. Timoshchuk, O. N. Ermakova, G. P. Shveikin, I. V. Nikolaenko // Doklady Physical Chemistry. - 2010. - vol. 434, № 1. - P. 154-157 : il. - Bibliogr. : p. 157 (14 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): КАРБИД ВОЛЬФРАМА -- ГЛИКОЛЯТ ВОЛЬФРАМА -- ПОРОШКИ НАНОДИСПЕРСНЫЕ \\\\Expert2\\nbo\\Doklady Physical Chemistry\\2010, V. 434, N 1, p. 154-157.pdf |
N 28 Nature of defects in nanocrystalline zinc oxide with particles of tubular morphology / M. A. Melkozerova, V. N. Krasil'nikov, O. I. Gyrdasova, E. V. Zabolotskaya, E. V. Shalaeva, R. F. Samigullina // Theoretical and Experimental Chemistry. - 2012. - Vol. 48, № 3. - P139-142 : il. - Bibliogr. : p. 142 (14 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ОКСИД ЦИНКА -- МАТЕРИАЛЫ НАНОРАЗМЕРНЫЕ -- СТРУКТУРА ДЕФЕКТНАЯ -- ЭПР -- ФОТОКАТАЛИЗ Аннотация: Nanostructured ZnO powders with particles of tubular form were synthesized by a precursor method. A narrow symmetrical line with a g factor of 2.002 was detected in the ESR spectra of the materials. On the basis of analysis of the dependence of the line intensities on the heat treatment conditions it was concluded that the signal belongs to singly charged oxygen vacancies V(+)O \\\\Expert2\\nbo\\Theoretical and Experimental Chemistry\\2012, V.48, № 3, p.139.pdf |
K 81 Krasil'nikov, V. N. Preparation of Thick LaCu1 – xNixO2.5 +delta Films Exhibiting a High-Temperature Metal–Semiconductor Transition / V. N. Krasil'nikov, G. V. Bazuev // Inorganic Materials. - 2002. - Vol. 38, № 10. - P. 1048-1052 : il. - Bibliogr. : p. 1052 (12 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ОКСИДЫ СЛОЖНЫЕ -- ПЛЕНКИ ТОЛСТЫЕ -- ВЫСОКОТЕМПЕРАТУРНЫЕ СВЕРХПРОВОДНИКИ -- МЕДЬСОДЕРЖАЩИЕ СВЕРХПРОВОДНИКИ Аннотация: The conditions for producing thick LaCu1- xNixO2.5 +delta films on different substrates were optimized. The effects of the heat-treatment conditions, substrate material, and the nature of the liquid organic binder on the composition, structure, and properties of the films were studied. Single-phase coatings obtained on MgO, ZrO2, BaSO4, and Ni substrates 50 to 200 mm in thickness were close in properties to bulk LaCu1-xNixO2.5 +delta and exhibited a metall–semiconductor transition at about 500° Полный текст |
V 26 Vanadyl and Titanium Glycolates as Precursors for the Preparation of Oxide Materials in the Form of Elongated Microparticles and Nanoparticles / V. N. Krasil'nikov, A. P. Shtin, O. I. Gyrdasova, I. V. Baklanova, L. A. Perelyaeva // Nanotechnologies in Russia . - 2008. - Vol. 3, № 1-2. - P106-111 : il. - Bibliogr. : p. 110-111 (14 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ГЛИКОЛЯТ ВАНАДИЛА -- ГЛИКОЛЯТ ТИТАНА -- ОКСИДЫ -- НАНОЧАСТИЦЫ Аннотация: This paper reports on the results of investigations of the optimum conditions for the formation and properties of vanadyl and titanium glycolates of the compositions VO(OCH2CHO) and Ti(OCH2CH2O)2 with elongated crystals, as well as solid solutions of the composition Ti1–xVx(OCH2CH2O)2(0 |
E 43 Electronic Structure and the Optical and Photocatalytic Properties of Anatase Doped with Vanadium and Carbon / V. M. Zainullina, V. P. Zhukov, V. N. Krasil'nikov, M. Yu. Yanchenko, L. Yu. Buldakova, E. V. Polyakov // Physics of the Solid State. - 2010. - vol. 52, № 2. - P271-280 : il. - Bibliogr. : p. 279-280 (45 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): АНАТАЗ -- ВАНАДИЙ -- КАРБОН -- ФОТОКАТАЛИТИЧЕСКИЕ СВОЙСТВА -- ЭЛЕКТРОННАЯ СТРУКТУРА Аннотация: The electronic structures of undoped anatase and anatase doped with carbon and vanadium have been calculated using the ab initio tight binding linear muffin tin orbital (TB-LMTO) method in the LSDA + U approximation. It has been shown that the doping of TiO2 leads to the formation of narrow bands of the C and V impurity states in the band gap. The calculations of the imaginary part of the dielectric function have made it possible to estimate the intensity of the optical absorption. It has been established that the doping with vanadium and carbon leads to optical absorption in the visible range and to an increase in the absorption in the ultraviolet range up to 4 eV. This should result in an increase in the photocatalytic activity on the surface of the doped anatase. The experimental determination of the photocatalytic activity of whiskers of the anatase doped with carbon and vanadium in the reaction of hydroquinone oxidation has confirmed the increase in the activity of the doped materials under exposure to ultraviolet, visible, and blue light. The phenomenon of dark catalysis in the anatase doped with carbon and vanadium has been interpreted within the concept of low-energy electronic excitations between the impurity levels of carbon Полный текст |
E 27 Effect of Ethylene Glycol on the Formation of Extended Crystals of M1/3Co2/3C2O4(M = Zn, Mn) Oxalates and Their Thermolysis Products / O. I. Gyrdasova, V. N. Krasil'nikov, I. G. Grigorov, G. V. Bazuev // Russian Journal of Inorganic Chemistry. - 2006. - Vol. 51, № 6. - P949-955 : il. - Bibliogr. : p. 954-955 (19 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ЭТИЛЕНГЛИКОЛЬ -- ОКСАЛАТЫ -- ТЕРМОЛИЗ -- ЦИНК -- МАРГАНЕЦ Аннотация: The effect of ethylene glycol (EG) on the formation of whiskers and fibers of complex oxides with the general formula MCo2O4 upon the thermolysis of M1/3Co2/3C2O4(M = Zn, Mn) oxalates has been studied. New compounds (solvates) are formed when powdered oxalates are heated with EG. In the solvates, EG molecules substitute for water molecules according to the reaction M1/3Co2/3C2O4· 2H2O + HOCH2CH2OH =M1/3Co2/3C2O4(HOCH2CH2OH) + 2H2O. The solvates have been characterized using X-ray powder diffraction, microscopy, IR spectroscopy, thermogravimetry, and chemical analysis. The shape, structure, and particle size of the thermolysis products of EG-modified oxalates have been determined using scanning electron microscopy Полный текст |
K 81 Krasil'nikov, V. N. Phase Ratios in the K2O-V2O4-SO3 System at High Sulfur Trioxide Concentrations / V. N. Krasil'nikov // Russian Journal of Inorganic Chemistry. - 2007. - Vol. 52, № 2. - P258-262 : il. - Bibliogr. : p. 262 (15 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ОКСИДНЫЕ СИСТЕМЫ -- ВАНАДИЕВЫЕ КАТАЛИЗАТОРЫ -- ТРИОКСИД СЕРЫ Аннотация: Phase ratios in the three-component oxide system K2O–V2O4–SO3 in the region of the sulfur trioxide concentrations corresponding to its concentrations in the active component of vanadium catalysts for SO2 to SO3 conversion have been studied using powder X-ray diffraction, IR spectroscopy, microscopy, and chemical analysis. Four individual compounds (K2VO(SO4)2, K2(VO)2(SO4)3, K2VO(SO4)2S2O7, and K2(VO)2(SO4)2S2O7) and K2(VO)2(SO4)2S2O7 and VOSO4-base solid solutions of composition K2(VO)2 + x(SO4)2 + xS2O7 (0 ≤ x ≤ 1.5) were found in the system. K2VO(SO4)S2O7 and K2(VO)2(SO4)2S2O7 lose their sulfur trioxide when heated above 350°C under an inert atmosphere, and convert to K2VO(SO4)2 and K2(VO)2(SO4)3, respectively. This implies that K2VO(SO4)2S2O7 and K2(VO)2(SO4)2S2O7, as well as K2(VO)2 + x(SO4)2 + xS2O7 solid solution, cannot exist in the active component of real industrial catalysts Полный текст |
K 81 Krasil'nikov, V. N. Phase Ratios in the M2O–V2O5–SO3 (M = Rb, Cs) Systems and the Properties of the Compounds Formed in These Systems / V. N. Krasil'nikov // Russian Journal of Inorganic Chemistry. - 2007. - Vol. 52, № 3. - P419-423 : il. - Bibliogr. : p. 423 (21 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): ОКСИДНЫЕ СИСТЕМЫ -- ПОРОШКОВАЯ ДИФРАКЦИЯ -- ЩЕЛОЧНЫЕ МЕТАЛЛЫ Аннотация: Powder X-ray diffraction and microscopy have been used to study phase ratios of the M2O–V2O5–SO3 (M = Rb, Cs) systems, which model the active component of rubidium–vanadium and cesium–vanadium catalysts for sulfuric acid production at high sulfur dioxide conversions. We have stated that each system forms four compounds: M3VO2(SO4)2, MVO2SO4, M4V2O3(SO4)4, and MVO(SO4)2. The thermal properties of these compounds and their interaction with water vapor saturated at room temperature have been studied. The unit cell parameters have been determined for the compounds MVO2SO4 (M = K, Rb), MVO(SO4)2, and M[VO2(SO4)(H2O)2] · H2O (M = Rb, Tl). The reciprocal transformations of the components and phases of the M2O–V2O5–SO3 systems match the Lux–Flood ideas of the acid–base properties of oxide compounds Полный текст |
C 91 Crystal Structure and Spectroscopic Properties A[VO2(SO4)(H2O)2] · H2O (A = K, Rb, Tl, NH4) Compounds / V. G. Zubkov, A. P. Tyutyunnik, I. F. Berger, V. N. Krasil'nikov, L. A. Perelyaeva, I. V. Baklanova // Russian Journal of Inorganic Chemistry. - 2007. - Vol. 52, № 9. - P1415-1423 : il. - Bibliogr. : p. 1422-1423 (18 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): СУЛЬФАТ ВАНАДИЯ -- СПЕКТРОСКОПИЯ Аннотация: The crystal structure of dioxovanadium(V) sulfate trihydrates A[VO2(SO4)(H2O)2] · H2O, where A is K, Rb, Tl, or NH4, has been determined based on a combination of neutron and X-ray diffraction data. The compounds are isostructural and have a monoclinic lattice (space group P21, Z = 2) with unit cell parameters ‡ = 6.24535(8), 6.26016(7), 6.25817(5), and 6.2500(1) Å; b = 9.8417(1), 9.99736(8), 9.96217(9), and 9.9742(1) Å; c = 6.52113(8), 6.69303(5), 6.70379(6), and 6.70334(9) Å; β = 106.99(1)°, 107.83(1)°, and 107.83(1)°, 107.99(1)°, respectively. The SO4 tetrahedra and VO4(H2O)2 octahedra share an oxygen vertex to form infinite isolated chains. Atoms A have CN = 10. IR and Raman spectroscopy data are reported Полный текст |
C 91 Crystal Structure and Spectroscopic Properties of AVO2SO4 (A = K, Rb) Compounds / A. P. Tyutyunnik, V. G. Zubkov, I. F. Berger, V. N. Krasil'nikov, L. A. Perelyaeva, I. V. Baklanova // Russian Journal of Inorganic Chemistry. - 2007. - Vol. 52, № 9. - P1424-1429 : il. - Bibliogr. : p. 1429 (20 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): КРИСТАЛЛИЧЕСКАЯ СТРУКТУРА -- ВАНАДАТЫ Аннотация: The crystal structure of alkali-metal dioxovanadium(V) sulfates AVO2SO4, where A is K or Rb, has been determined based on a combination of neutron and X-ray diffraction data. The compounds are isostructural and have an orthorhombic lattice (space group P212121, Z = 4) with unit cell parameters a = 11.1004(2) and 10.8193(1) Å; b = 8.2626(2) and 8.9042(1) Å; c = 5.4772(1) and 5.5722(1) Å, respectively. The structures are of the chain type. Zigzag chains are formed by vertex-sharing VO6 octahedra. Sulfate groups SO4 link neighboring chains and form a spatial framework with cavities accommodating alkali-metal atoms with CN = 9 (K) and 8 (Rb). IR and Raman spectroscopy data are reported Полный текст |