34 Result(s)
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Article
V. P. Isupov
Chemistry
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Article
Crystallochemical features of the anion varieties of aluminum and lithium binary hydroxide
Crystallochemical features of anion (Cl−, Br−, I−, NO 3 − , CO 3 2− , SO 4 ...
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Using intercalation compounds of aluminum hydroxide for syntheses of nanoscale systems
Routes for synthesizing intercalation compounds of aluminum hydroxide [MxAly(OH)z]n X · pH2O (M=Li, Mg, Ni, Co, …) are suggested, and application of these schemes to syntheses of nanoscale systems is examined. It...
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Structural mechanism of selective binding of lithium on a solid matrix of Al(OH)3 from aqueous solutions
The structure of intercalation complexes of aluminum hydroxide with lithium salts is investigated by X-ray diffractometry and by21Al,7Li, and1H NMR. The lithium ions occupy vacant positions in the octahedral void...
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Intercalation compounds of aluminum hydroxide
Crystalline aluminum trihydroxides Al(OH)3 (gibbsite, baverite, and nordstrandite) can serve as layered intercalation matrices in which metal salts are arranged in a specific way. Small cations (lithium, magnesiu...
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Article
Structural Effects of Intercalation in [LiAl2(OH)6]Cl ⋅ xH2Os (1H, 7Li, 27Al NMR)
1H, 7Li, and 27Al NMR was used to study [LiAl2(OH)6]Cl ⋅ xH2O systems (x = 0, 1.6, and 2.8). At larger x values, the amplitude of the librational motion of the hydroxyl groups increases and the chloride ions are...
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Using NMR in Structural Studies of Aluminum Hydroxide Intercalation Compounds with Lithium Salts
The effect of the anion charge on the structure of [LiAl2(OH)6]nX (X = Cl-, Br-, I-, SO4 2-, C6H8O4 2-) intercalation compounds and the water effect on the structure of [LiAl2(OH)6]Cl·nH2O have been studied using...
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Template Synthesis of Superparamagnetic Nickel Particles upon Thermal Decomposition of [LiAl2(OH)6]2[Ni(EDTA)] · 4H2O
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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 [M0.7Al(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...
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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...
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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...
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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...
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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...
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Highly dispersed ferromagnetic systems based on superparamagnetic nickel particles and Li-Al double hydroxides
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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...
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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...
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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...
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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...
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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. ...
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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...
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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...
