排序方式: 共有28条查询结果,搜索用时 31 毫秒
1.
Kovaleva E. G. Molochnikov L. S. Kharchuk V. G. Kuznetsova O. V. Shishmakov A. B. Yanchenko M. Yu. Buldakova L. Yu. Zhdanov I. N. Mikushina Yu. V. Petrov L. A. 《Kinetics and Catalysis》2004,45(5):752-758
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. 相似文献
2.
A. B. Shishmakov Yu. V. Mikushina O. V. Koryakova M. S. Valova S. Yu. Men’shikov L. A. Petrov 《Russian Journal of Applied Chemistry》2011,84(9):1555-1559
Fundamental aspects of the synthesis of 2,3,5-trimethylbenzoquinone by oxidation of 2,3,6-trimethylphenol adsorbed on the
surface of a titanium dioxide xerogel and on TiO2 modified with powdered cellulose with hydrogen peroxide without any organic solvent involved in the process were studied. 相似文献
3.
A. B. Borisov S. A. Zykov N. A. Mikushina A. S. Moskvin 《Physics of the Solid State》2002,44(2):324-332
Various types of magnetic structure in a two-dimensional Heisenberg ferromagnet are considered in a continuum approximation. The effect of anisotropic exchange and single-ion anisotropy on the vortex structure is analyzed. A new type of static magnetic structure (“target”) is predicted and investigated in an easy-plane ferromagnet. 相似文献
4.
Russian Chemical Bulletin - A simplifi ed procedure for the synthesis of Pd0/TiO2 xerogel has been developed, which includes the following steps: hydrolysis of tetrabutoxytitanium from its mixture... 相似文献
5.
A. B. Shishmakov O. V. Koryakova Yu. V. Mikushina L. A. Petrov 《Russian Journal of Inorganic Chemistry》2014,59(9):979-985
Synthesis of porous zirconium and titanium dioxides was accomplished by a procedure that includes impregnation of cellulose and activated charcoal matrices with tetrabutoxyzirconium (tetrabutoxytitanium) solutions, hydrolysis of the precursors with atmospheric moisture at 25°C, burning the matrix, and incineration of xerogels at 850°C. Relationship between precursor solution concentration at impregnation stage, matrix type, and physicochemical properties of prepared materials was established. 相似文献
6.
A. B. Shishmakov Yu. V. Mikushina O. V. Koryakova M. S. Valova L. A. Petrov S. A. Melkozerov 《Russian Journal of Inorganic Chemistry》2012,57(6):787-793
TiO2-SiO2 xerogels have been synthesized by the hydrolysis of tetrabutoxytitanium-tetraethoxysilane mixtures in a 10% aqueous ammonia vapor and concentrated hydrochloric acid vapor atmospheres under static conditions. The dependence of the physical and chemical properties of the xerogels on the synthetic conditions has been investigated. 相似文献
7.
S. Yu. Men’shikov Yu. V. Mishina Yu. V. Mikushina A. A. Ostroushko 《Russian Journal of Applied Chemistry》2008,81(1):52-54
The catalytic activity exhibited in turpentine oxidation at elevated pressure by cobalt coordination compounds, some transition metal compounds, in particular, polyoxometallate with spherical nanoclusters (Mo132), vanadium oxide bronze, and cobalt complexes immobilized on AN-241 anion exchanger was studied. 相似文献
8.
L. A. Petrov A. B. Shishmakov S. V. Vakarin O. L. Semerikova A. A. Melyaeva Yu. V. Mikushina Yu. P. Zaikov O. N. Chupakhin 《Russian Journal of Inorganic Chemistry》2014,59(1):7-10
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. 相似文献
9.
E. V. Parshina L. S. Molochnikov E. G. Kovaleva A. B. Shishmakov Yu. V. Mikushina I. A. Kirilyuk I. A. Grigor’ev 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2011,85(3):452-456
Composite materials (CMs) were synthesized from silica and titania xerogels. The influence of the charged state of the CM
surface on complexation with Cu2+ ions and the catalytic activity of the obtained samples in model oxidative dehydrogenation of trimethylhydroquinone with
air oxygen was analyzed. Using powder cellulose in the synthesis of CMs increased the specific surface of inorganic dioxides
and lowered the negative electric potential of the CM surface. This caused a redistribution of the ratio between different
types of copper structures formed in the samples during the copper sorption and led to the catalytic activity of the CMs. 相似文献
10.
A. B. Shishmakov Yu. V. Mikushina A. S. Seleznev O. V. Koryakova M. S. Valova L. A. Petrov 《Russian Journal of Applied Chemistry》2008,81(12):2180-2182
A procedure was developed for preparing a carbon-silica composite by thermolysis of powdered cellulose in the presence of tetraethoxysilane. The resulting composite was studied in model processes of trimethylhydroquinone oxidation and hydrogen peroxide decomposition. 相似文献