Центральная Научная Библиотека УрО РАН

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   P 56


    Phase equilibria and butane oxidation studies of the MgO-V2O5-MoO3 system [] / W. D. Harding, H. H. Kung, V. L. Kozhevnikov, K. R. Poeppelmeier // Journal of Catalysis. - 1993. - V. 144, N 2. - С. 597-610 . - ISSN 0021-9517

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
РАВНОВЕСИЕ ФАЗОВОЕ -- ФАЗОВОЕ РАВНОВЕСИЕ -- ОКИСЛЕНИЕ БУТАНА -- СИСТЕМЫ ТРОЙНЫЕ -- ТРОЙНЫЕ СИСТЕМЫ -- Mg -- МАГНИЙ -- V -- ВАНАДИЙ -- Mo -- МОЛИБДЕН -- ОКСИД МАГНИЯ -- ОКСИД ВАНАДИЯ -- ОКСИД МОЛИБДЕНА -- ОРТОВАНАДАТ МАГНИЯ -- РАСТВОРИМОСТЬ
Аннотация: Исследованы фазовые состояния в системе MgO-V2O5-MoO3 в области, богатой MgO и обнаружено новое соединение Mg2,5VMoO8. Определены пределы растворимости MoO3 в ортованадате Mg и определена каталитическая активность в окислении C4H10 в ряду Mg3V2O8-Mg2,5VMoO8-MgMoO4. Все соединения на основе ортованадата Mg обладают высокой селективностью, а введение MoO3 сопровождается увеличением содержания продуктов крекинга

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    51V-NMR spectra of vanadates and oxosulfato-vanadates of alkali metals [Text] / V. M. Mastikhin, O. B. Lapina, V. N. Krasilnikov, A. A. Ivakin // Reaction Kinetics and Catalysis Letters. - 1984. - V. 24, N 1-2. - P119-125 . - ISSN 0133-1736

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ХИМИЯ -- V -- ВАНАДИЙ -- ВАНАДАТЫ -- ЯДЕРНЫЙ МАГНИТНЫЙ РЕЗОНАНС -- ЯМР -- ЯМР-СПЕКТРЫ -- ОКСОСУЛЬФАТОВАНАДАТЫ -- ОКСОСУЛЬФАТОВАНАДАТЫ ЩЕЛОЧНЫХ МЕТАЛЛОВ -- ВАНАДАТЫ ЩЕЛОЧНЫХ МЕТАЛЛОВ -- ЩЕЛОЧНЫЕ МЕТАЛЛЫ -- МЕТАЛЛЫ ЩЕЛОЧНЫЕ

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   S 89


    Structure and Catalytic Properties of a Cu2+-Containing Hydrogel of Zirconium Dioxide [Текст] / E. G. Kovaleva, L. S. Molochnikov, V. G. Kharchuk, O. V. Kuznetsova, A. B. Shishmakov, M. Yu. Yanchenko, L. Yu. Buldakova, I. N. Zhdanov, Yu. V. Mikushina, L. A. Petrov // Kinetics and Catalysis (Translation of Kinetika i Kataliz). - 2004. - Vol. 45, № 5. - С. 752-758. - Библиогр. : с. 758 (17 назв.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
КАТАЛИТИЧЕСКИЕ СВОЙСТВА -- МЕДЬ ДВУХВАЛЕНТНАЯ -- ДИОКСИД ЦИРКОНИЯ
Аннотация: The distribution of Cu2+ ions in ZrO2 and sulfated ZrO2 hydrogel phases was studied by EPR spectroscopy and voltammetry. The formation of the following three types of copper structures was observed mononuclear Cu2+ complexes (A), magnetic associates (B), and Cu2+ compounds (C) that gave no EPR signals under the conditions used in the spectroscopic measurements. The specific catalytic activity of various Cu2+ compounds in the liquid-phase reaction of 2,3,5-trimethyl-1,4-hydroquinone oxidation was determined. The copper complexes C were found to exhibit the highest catalytic activity

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   V 26


    Vanadium–Titanium Oxides: Sol–Gel Synthesis and Catalytic Properties in Chlorobenzene Oxidation / V. L. Volkov, E. I. Andreikov, G. S. Zakharova, V. Yu. Gavrilov, V. V. Kaichev, V. I. Bukhtiyarov // Kinetics and Catalysis. - 2008. - Vol. 49, № 3. - С. 446-450 : il. - Bibliogr. : p. 450 (15 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ВАНАДИЕВО-ТИТАНОВЫЕ ОКСИДЫ -- МЕТОД ЗОЛЬ-ГЕЛЬ
Аннотация: Vanadium–titanium mixed oxides with V/Ti = 0.025, 0.050, and 0.100 have been synthesized by sol–gel processing. The anatase–rutile transition temperature decreases from 750 to 600°C as the vanadium content of the TiO2 phase is increased. The most important texture parameters and the photoelectron and IR spectra of the oxides are reported. The oxides exhibit high catalytic activity in chlorobenzene oxidation, which is due to their specific electronic and crystal structures

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   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.)

ББК 54
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

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   P 78

    Podval'naya, N. V.
    Potassium vanadates of mixed valence as sulfuric acid catalyst precursors / N. V. Podval'naya, V. L. Volkov, E. I. Andreikov // Reaction Kinetics and Catalysis Letters. - 2001. - Vol. 73, № 2. - P357-365 : il. - Bibliogr. : p. 365 (6 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ВАНАДАТЫ -- КАТАЛИЗАТОРЫ СЕРНОКИСЛОТНЫЕ
Аннотация: The kinetics of hydrolytic precipitation of potassium vanadates KxV12O31-δ·nH2O (0 < x ≤ 2.25; 0 < δ≤ 1.15) from a KVO3 solution at pH = 1.7 and 80oC in the presence of K2SO4 and VOSO4 is controlled by second and third order reactions respectively occurring on the precipitate surface. This difference is due to the effect of VO2+ ions on the polymer anion [V12O31-δ]n formation. Potassium vanadates KxV12O31-δ·nH2O and KxV3O8-δ·nH2O (1.02 ≤ x ≤ 1.91; 0 ≤ δ ≤ 0.22) can be used as vanadium-containing precursors for sulfuric acid catalysts

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   E 58

    Enyashin, A. N.
    Nanosized allotropes of molybdenum disulfide / A. N. Enyashin, S. Gemming, G. Seifert // European Physical Journal Special Topics. - 2007. - Vol. 149. - P103-125 : il. - Bibliogr. : p. 125 (124 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
ДИСУЛЬФИД МОЛИБДЕНА -- АЛЛОТРОПИЯ -- НАНОРАЗМЕРНЫЕ СТРУКТУРЫ
Аннотация: The present review provides an overview of the rich polymorphism encountered on different length scales within the very versatile material class of transition metal chalcogenides. On the mesoscopic to nanoscopic scale such compounds exhibit a wide variety of nanostructured allotropes with varying dimensionality and competing internal structure, such as nanorods, nanostripes, nanotubes, fullerene-like particles and fullerenes. On the atomistic scale, competing local atomic arrangements within one type of allotrope determine crucially the stability, the chemical potential, and the electronic properties. Thus, any modeling of such structures cannot be restricted to purely classical or quantummechanical approaches, but rather the development of classical models on the basis of electronic-structure calculations is required to fully account for all relevant nano- and meso-scale effects. The main part of this review is dedicated to the stability of such nanosystems in relation with the stable size regimes, with their electronic structure, and the derived analysis of the reactivity and application potential. The calculations explain, why the nano-scale properties of the MoS2 allotropes can be quite different from the bulk ones, and predict novel effects both within and in addition to the established applications of MoS2 compounds in catalysis, tribology, electronics and electrochemistry

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   I-65


    Inorganic Nanotubes and Fullerene-Like Structures (IF) / R. Tenne, M. Remiskar, A. N. Enyashin, G. Seifert // Topics in Applied Physics. - 2008. - Vol. 111. - P631-671 : il. - Bibliogr. : p. 660-669 (162 ref.)

ББК 54
Рубрики: ХИМИЧЕСКИЕ НАУКИ
Кл.слова (ненормированные):
НЕОРГАНИЧЕСКИЕ НАНОТРУБКИ -- ФУЛЛЕРЕНОПОДОБНАЯ СТРУКТУРА
Аннотация: Back in 1992 it was proposed that nanoparticles of layered compounds will be unstable against folding and will close up into fullerene-like structures (IF) and nanotubes. In the years that followed nanotubes and fullerene-like structures were synthesized from numerous compounds with layered structure. More recently, crystalline and noncrystalline nanotubes of compounds with a 3D, i.e., quasi-isotropic lattice have been intensively investigated. In view of their eminent applications potential, much effort and substantial progress has been achieved in the scaling-up of the synthesis of inorganic nanotubes and fullerene-like nanoparticles of WS2 and MoS2 and also other compounds. Early on it was suggested that hollow nano-octahedra consisting of a few hundred MoS2 moieties make the true analogs of C60, etc. This notion has been advanced considerably in recent years through a combined experimental–theoretical effort. tribological applications and lately for impact resilient nanocomposites. These tests indicated that IF-MoS2 and IF-WS2 are heading for large-scale applications in the automotive, machining, aerospace, electronics, defense, medical and numerous other kinds of industries. A few products based on these nanoparticles have been recently commercialized by “ApNano Materials, Inc” (“NanoMaterials, Ltd.”, see also www.apnano.com). Most recently, a manufacturing facility for the commercialization of these nanomaterials has been erected and sales of the product started. Novel applications of inorganic nanotubes and fullerene-like nanoparticles in the fields of catalysis; microelectronics; Li rechargeable batteries; medical and optoelectronics will be discussed

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