50 Result(s)

Article

Effect of the nature of a textural promoter on the catalytic properties of a nickel-copper catalyst for hydrocarbon processing in the production of carbon nanofibers

The results from research on develo** and optimizing a method for preparing a catalyst designed for hydrocarbon processing in order to produce carbon materials are presented. The chosen method of catalyst pr...

I. A. Strel’tsov, O. B. Vinokurova, I. V. Tokareva, I. V. Mishakov… in Catalysis in Industry (2014)

Article

Geochemistry and chemical evolution of saline lakes of Western Mongolia

This paper presents data on the major and trace element composition of saline lakes of western Mongolia. The main geochemical types of lakes distinguished in the study are soda-, chloride-, and sulfaterich lak...

S. L. Shvartsev, M. N. Kolpakova, V. P. Isupov… in Geochemistry International (2014)

Chapter and Conference Paper

The Effect of Mechanical Activation on the Synthesis and Properties of Multiferroic Lead Iron Niobate

The present work studies the effect of high-energy mechanical activation using the planetary-centrifugal ball mill AGO-2 and subsequent annealing on the synthesis and magnetic properties of PbFe_0.5Nb_0.5O₃ (PFN). ...

A. A. Gusev, I. P. Raevski, E. G. Avvakumov, V. P. Isupov… in Advanced Materials (2014)

Article

Effect of violations of the structure and layer packing on the diffraction pattern of gibbsite and bayerite

Using the simulation method for the diffraction patterns of one-dimensionally disordered materials, the effect of different violations in the layered structure of aluminum trihydroxides (gibbsite and bayerite)...

K. I. Shefer, S. V. Cherepanova, S. V. Tsybulya… in Journal of Structural Chemistry (2013)

Article

Geochemical model of uranium accumulation in Shaazgai-Nuur Lake (Northwestern Mongolia)

V. P. Isupov, S. Ariunbileg, L. I. Razvorotneva, N. Z. Lyakhov… in Doklady Earth Sciences (2013)

Article

Effect of mechanical activation of Al(OH)₃ on its reaction with Li₂CO₃

The effect of preliminary mechanical activation of Al(OH)₃ on its solid-state reaction with Li₂CO₃ at temperatures above 800°C has been studied by thermogravimetry, X-ray diffraction, in situ X-ray diffraction, e...

V. P. Isupov, N. V. Eremina in Inorganic Materials (2012)

Article

Mechanochemical synthesis of γ-LiAlO₂ studied by ⁶Li and ²⁷Al NMR and synchrotron X-Ray diffraction

The structural transformations accompanying the mechanochemical synthesis of fine-particle γ-LiAlO₂ have been studied by ⁶Li and ²⁷Al NMR and in situ X-ray diffraction. Mechanical activation of a mixture of alumi...

V. P. Isupov, O. A. Kharlamova, L. E. Chupakhina… in Inorganic Materials (2011)

Article

Uranium in saline lakes of Northwestern Mongolia

Analysis of major- and trace-element compositions of water in hypersaline soda closed basin lakes of Northwestern Mongolia and Chuya basin (Gorny Altai) shows high enrichment in ²³⁸U (up to 1 mg/l). Proceeding fr...

V. P. Isupov, A. G. Vladimirov, N. Z. Lyakhov, S. L. Shvartsev… in Doklady Earth Sciences (2011)

Article

Prospects for the use of lithium-bearing minerals

The results of many-year studies on the development of processing technology for crude spodumene ore have been generalized, and as a final product a double hydroxide of aluminum and lithium has been obtained. ...

N. P. Kotsupalo, V. P. Isupov… in Theoretical Foundations of Chemical Engine… (2009)

Article

Synthesis and thermolysis of lithium aluminum double hydroxide containing [Fe(OH)Edta]²⁻

The reaction of the chloride form of lithium aluminum layered double hydroxide (Li-Al LDH) with an aqueous solution of NaFeEdta · 2H₂O (pH 3.7) was studied. Anion exchange of chloride ions for [FeEdta]⁻ anions al...

V. P. Isupov, L. E. Chupakhina, R. P. Mitrofanova… in Russian Journal of Inorganic Chemistry (2009)

Article

Mechanochemical synthesis of a hydroxycarbonate form of layered magnesium aluminum hydroxides

Mechanical activation of a mixture of magnesium hydroxide, aluminum hydroxide, and sodium bicarbonate in an AGO-2 planetary mill, followed by water washing leads to the formation of a layered magnesium aluminu...

V. P. Khusnutdinov, V. P. Isupov in Inorganic Materials (2008)

Article

Synthesis of highly dispersed ferromagnetic materials based on layered lithium aluminum hydroxides and nickel and cobalt particles

The reaction between a concentrated aqueous lithium nitrate solution and a cobalt-containing composite prepared through the thermal decomposition of [LiAl₂(OH)₆]₂[CoEDTA] · 4H₂O in vacuum at temperatures from 400...

V. P. Isupov, L. E. Chupakhina, R. P. Mitrofanova in Inorganic Materials (2008)

Article

Mechanochemical synthesis of fine-particle γ-LiAlO₂

We describe a new approach for the synthesis of fine-particle gamma lithium aluminate, γ-LiAlO₂, which involves mechanical activation of mixtures of Al(OH)₃ and Li₂CO₃ and heat treatment of the products. The form...

O. A. Kharlamova, R. P. Mitrofanova, V. P. Isupov in Inorganic Materials (2007)

Article

Highly dispersed ferromagnetic systems based on superparamagnetic nickel particles and Li-Al double hydroxides

V. P. Isupov, L. E. Chupakhina, R. P. Mitrofanova… in Doklady Physical Chemistry (2007)

Article

Mechanism of formation of nanosized copper particles in a nanoreactor based on the [LiAl₂(OH)₆]₂[Cuedta]·nH₂O supramolecular system

The formation of nanosized copper particles in a nanoreactor based on the [LiAl₂(OH)₆]₂[Cuedta]·nH₂O supramolecular system [Li-Al-Cu(edta)] was studied by the DTA, XRPA, FMR, IR, and mass spectrometry methods. Th...

V. P. Isupov, R. P. Mitrofanova, L. É. Chupakhina… in Journal of Structural Chemistry (2007)

Article

Mechanical Activation of Kaolinite in the Presence of Concentrated Sulfuric Acid

Physicochemical processes that occur in mechanical activation of kaolinite in centrifugal-planetary mills in the presence of concentrated sulfuric acid were studied. A scheme of formation of aluminum sulfate i...

B. N. Dudkin, I. V. Loukhina, V. P. Isupov… in Russian Journal of Applied Chemistry (2005)

Article

Mechanism of formation of cobalt nanoparticles in a nanoreactor based on supramolecular system [LiAl₂(OH)₆]₂[Coedta]·nH₂O

DTA (differential thermal analysis), XPA (XRD phase analysis), FMR (ferromagnetic resonance), and IR (infrared spectroscopy) methods were used to study the formation of nanosized particles of cobalt in a nanor...

V. P. Isupov, R. P. Mitrofanova, L. É. Chupakhina… in Journal of Structural Chemistry (2005)

Article

Ferromagnetic Resonance of Nickel Nanoparticles in an Amorphous Oxide Matrix

The formation of a ferromagnetic phase in the thermal decomposition of a layered lithium–aluminum double hydroxide with intercalated nickel–EDTA complexes was studied using ferromagnetic resonance (FMR) spectr...

M. M. Yulikov, I. S. Abornev, O. N. Mart'yanov, V. F. Yudanov… in Kinetics and Catalysis (2004)

Article

Investigation of the formation of nickel and cobalt nanoparticles upon thermal decomposition of Ni,Al-and Co,Al-layered double hydroxides pillared with complexes [Ni(edta)]²⁻ and [Co(edta)]²⁻

Double layered hydroxides [M_0.7Al(OH)_3.6] [M(edta)]_0.4·nH₂O (M,Al-M(edta), M = Ni, Co) containing nickel or cobalt edta complexes in the interlayer space were obtained for the first time. Vacuum thermal decomposi...

E. V. Starikova, V. P. Isupov, K. A. Tarasov… in Journal of Structural Chemistry (2004)

Article

Template Synthesis of Superparamagnetic Nickel Particles upon Thermal Decomposition of [LiAl₂(OH)₆]₂[Ni(EDTA)] · 4H₂O

V. P. Isupov, K. A. Tarasov, L. E. Chupakhina, R. P. Mitrofanova… in Doklady Chemistry (2003)