T 64 Titanium dioxide xerogel modified with powder cellulose in oxidation of trimethylhydroquinone [Electronic resource] / A. B. Shishmakov, Yu. V. Mikushina, M. S. Valova, O. V. Koryakova, L. A. Petrov // Russian Journal of Applied Chemistry. - 2007. - Vol. 80, № 12. - P2107-2110. - Библиогр. : с. 2110 (17 назв.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: A procedure was developed for modification of titanium dioxide xerogel by addition of powder cellulose in the stage preceding hydrolysis of tetramethoxytitanium. The resulting catalytic systems based on the new material were studied in a model liquid-phase catalytic process of oxidative dehydrogenation of trimethylhydroquinone with atmospheric oxygen. \\\\Expert2\\nbo\\Russian Journal of Applied Chemistry\\2007, v. 80, N 12, p.2107.pdf |
R 30 Reactivity of nanocrystalline copper oxide and its modification under magnetic field [Text] / A. Ye. Yermakov [и др.] // Solid State ionics. - 2004. - Vol. 172, № 1-4. - P317-323 Рубрики: ХИМИЧЕСКИЕ НАУКИ Аннотация: The influence of magnetic field on the rate of oxidative dehydrogenation of 2,3,5-trimetyl-1,4-hydroquinone (TMHQ) to 2,3,5-trimetyl-1,4-benzoquinone (TMBQ) with catalysts based on copper oxide nanopowders has been investigated. The initial transformation rate of TMHQ and the final product yield greatly increase after a preliminary magnetization of nanopowders. The adsorption ability of Cu-oxide-based nanopowders with respect to ammonia enhances by 1.5 after their magnetization. Physical mechanism of reactivity variation of CuO nanopowders under the influence of weak stationary external magnetic field (H?3 kOe) has been proposed. As a result of magnetic field influence, the ferromagnetic regions with modified spin and charge state have appeared in an antiferromagnetic CuO of nonstoichiometric composition. These regions can be new catalytic or adsorption centers \\\\Cserver\\dist\\НБО\\Электронная библиотека_Библиогр1\\Solid State Ionics\\2004, v.172, N 1-4, p.317.pdf |
L 79 Liquid-phase oxidation of trimethylhydroquinone catalyzed by copper(II) chloride in the presence of cellulose inorganic composites [Text] : доклад, тезисы доклада / A. B. Shishmakov, Yu. V. Mikushina, M. S. Valova, O. V. Koryakova, L. A. Petrov // III International Conference "Catalysis: Fundamentals and Application", dedicated to the 100th anniversary of Academician G. K. Boreskov, Novosibirsk, July 4-8 2007 : abstr. . - Novosibirsk, 2007. - P97-98 Рубрики: ХИМИЧЕСКИЕ НАУКИ |
C 31 Catalase activity of coarse grained and nanosized oxide tungsten bronzes [Electronic resource] / S. V. Vakarin, L. A. Petrov, Yu. V. Mikushina, A. B. Shishmakov, O. N. Chupakhin // Russian Chemical Bulletin (Translation of Izvestiya Akademii Nauk, Seriya Khimicheskaya). - 2011. - Vol.60, №10. - С. 1985-1988. - Bibliogr. : p. 1988 (11 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): NANOCRYSTALS -- CATALASE ACTIVITY -- ELECTROLYSIS OF MOLTEN SALTS Аннотация: Nanocrystalline samples of KxLiyWO3 with hexagonal structure obtained by electrodeposi tion of molten salts were several times more active in catalytic decomposition than the coarse grained materials \\\\expert2\\NBO\\Russian Chemical Bulletin\\2012, 61 (10), 1985-1988.pdf |
B 39 Behavior of nanosized tungsten oxide bronzes produced by high-temperature electrolysis in model processes of desulfurization of petroleum products [Electronic resource] / L. A. Petrov, A. B. Shishmakov, S. V. Vakarin, O. L. Semerikova, O. L. Melyaeva, Yu. V. Mikushina, Yu. P. Zaikov, O. N. Chupakhin // Russian Journal of Inorganic Chemistry (Zhurnal Neorganicheskoi Khimii). - 2014. - Vol.59, №1. - С. 7-10. - Bibliogr. : p. 10 (16 ref.) Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): OXIDE BRONZES -- NANOSIZED TUNGSTEN -- DESULFURIZATION OF PETROLEUM PRODUCTS Аннотация: Tungsten oxide bronzes were produced by an original method of high-temperature electrochemical deposition. Their catalytic properties in a model process of desulfurization of petroleum products-benzothiophene peroxidation were studied. The effect of the particle size on the catalytic and catalase activity of samples was shown. \\\\expert2\\nbo\\Russian Journal of Inorganic Chemistry\\2014, v. 59, N. 1, p.7-10.pdf |
S 54 Shishmakov, A. B. Concise synthesis of silver-containing titania xerogels / A. B. Shishmakov, Yu. V. Mikushina // Russian Journal of Applied Chemistry. - 2021. - Vol. 94, № 7. - P879-883 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): XEROGEL -- CALCINATION -- TITANIUM DIOXIDE -- SILVER Аннотация: A concise procedure was developed for the synthesis of silver-containing xerogels Ag(0)/TiO2 [0.23.2 wt % Ag(0)], including the dissolution of AgNO3 in tetrabutoxytitanium, hydrolysis of the solution in acetic acid–water vapors, drying, and calcining the xerogel at 600–800°C. It was found by X-ray diff raction analysis and electron microscopy that the bulk of metallic silver particles (75–90%) in the material calcined at 800°C has a size of 25–45 nm. The fraction of particles (in the form of crystal intergrowths) with a diameter of 95–115 nm rises with an increase in the AgNO3 concentration at the dissolution stage; TiO2 is present in the rutile phase. At a calcination temperature of 600°C, the dominant TiO2 phase (72%) is anatase; in this case the size of silver particles is 5–10 nm. |
Shishmakov, A. B. Few-step synthesis of PdO/TiO2 and Pd/TiO2 xerogels / A. B. Shishmakov, Yu. V. Mikushina, O. V. Koryakova // Inorganic Materials. - 2021. - Vol. 57, № 2. - P164-170 Рубрики: ХИМИЧЕСКИЕ НАУКИ Кл.слова (ненормированные): XEROGEL -- TITANIUM DIOXIDE -- PALLADIUM Аннотация: We demonstrate a few-step technique for the synthesis of PdO/TiO2 and Pd/TiO2 (0.1–2.0 wt % Pd) xerogels, which comprises hydrolysis of a palladium nitrate solution in titanium tetrabutoxide in the vapor atmosphere over an aqueous acetic acid solution, drying, and calcination of the material between 800 and 870°C. According to X-ray diffraction and electron microscopy characterization results, after calcination at 800°C the xerogels contained palladium in the form of PdO particles ≤3–5 nm in size. The highly dispersed palladium(II) oxide covered the surface of the rutile crystallites and filled pores in between. Throughout the range of Pd(NO3)2 concentrations studied, the PdO particles were identical in size. In the material calcined at 870°C, palladium had the form of metallic particles ranging in diameter from 55 to 420 nm. Raising the palladium nitrate concentration in titanium tetrabutoxide was shown to increase the average size of the Pd particles. |