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Dive into the research topics where L. A. Zemskova is active.

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Featured researches published by L. A. Zemskova.


Inorganic Materials | 2010

Atomic force microscopy and X-ray photoelectron spectroscopy study of chitosan-carbon fiber materials

Yu. M. Nikolenko; V. G. Kuryavyi; I. V. Sheveleva; L. A. Zemskova; V. I. Sergienko

Chitosan-carbon materials produced by electrochemical deposition of chitosan on an activated carbon fiber (ACF) as an electrode have been studied by atomic force microscopy (AFM) and X-ray photoelectron spectroscopy (XPS). AFM data demonstrate that the microstructure of the coating depends on whether chitosan is deposited in soluble or insoluble form. XPS data are used to evaluate the state of chitosan in the composites in relation to the deposition conditions.


Russian Journal of Applied Chemistry | 2008

Manganese oxide carbon fibrous materials

L. A. Zemskova; I. V. Sheveleva; N. N. Barinov; T. A. Kaidalova; A. V. Voit; S. V. Zheleznov

Changes in electrochemical properties and surface morphology of carbon fibrous materials upon modification with manganese oxides under various conditions of their deposition were studied. The composition of manganese oxides was determined. The capacitances of the electrical double layer of manganese oxide carbon fibrous materials in sodium chloride solutions of various concentrations were found. Charging parameters of the modified electrodes were determined.


Russian Journal of Inorganic Chemistry | 2009

Rhenium Sorption by Fibrous Chitosan-Carbon Materials

A. V. Plevaka; I. D. Troshkina; L. A. Zemskova; A. V. Voit

We studied equilibrium and kinetic characteristics of rhenium sorption by Busofit-based fibrous carbon materials (FCMs) treated electrochemically with recovery potentials varying from −900 to +600 mV from aqueous solutions in the presence of natural biopolymer chitosan. Materials obtained in the anodic potential region and at the open-circuit potential have the best capacity characteristics. The highest rhenium capacity is observed for the material prepared at the recovery potential +600 mV. The relevant sorption isotherm is described by the Langmuir equation with the constant 73.0 ± 8.1 mL/mg; the half-conversion time is 3 min.


Russian Journal of Applied Chemistry | 2008

Correlation of electrochemical and structural characteristics of chitosan-carbon fibrous materials

I. V. Sheveleva; L. A. Zemskova; S. V. Zheleznov; A. V. Voit; N. N. Barinov; V. G. Kuryavyi; V. I. Sergienko

Changes in the electrochemical properties and morphology of the surface of fibrous materials in the course of their modification with chitosan were studied in relation to the conditions of biopolymer deposition. The capacitances of the electrical double layer of the chitosan-carbon materials in NaCl solutions of various concentrations were determined by of cyclic voltammetry and the method of charging curves. The parameters of charging of the modified electrodes were calculated.


Russian Journal of Applied Chemistry | 2007

Relationship between electrochemical and structural properties of modified carbon fibers

I. V. Sheveleva; L. A. Zemskova; A. V. Voit; S. V. Zheleznov; V. G. Kuryavyi

Effect of modification conditions on the electrochemical and structural properties of fibrous carbon materials was studied.


Russian Journal of Electrochemistry | 2011

Study of the formation and electrochemical properties of nickel oxide-carbon fiber composites obtained in the presence of surfactants

I. V. Sheveleva; L. A. Zemskova; A. V. Voit; V. G. Kuryavyi; V. I. Sergienko

The electrochemical properties of nickel oxide-carbon fiber composites obtained in the presence of SDS and PEG surfactants and chitosan biopolymer by means of cyclic voltammetry have been investigated. The material’s capacity parameters have been determined and the charging times and electrolyte resistance in pores have been calculated. The interrelation between the electrochemical and structural composite parameters are demonstrated.


Russian Journal of Applied Chemistry | 2007

Effect of modification on electrochemical and sorption properties of woven carbon materials

I. V. Sheveleva; L. A. Zemskova; S. V. Zheleznov; A. V. Voit; N. N. Barinov; S. V. Sukhoverstov; V. I. Sergienko

Relationship between electrochemical, structural, and sorption properties of woven carbon materials modified with chitosan was studied.


Fibre Chemistry | 2014

INFLUENCE OF MODIFICATION ON THE ELECTROCHEMICAL PROPERTIES AND THERMAL OXIDATION STABILITY OF CARBON FIBERS

L. A. Zemskova; A. V. Voit; N. A. Didenko

The electrochemical and thermal properties of composites prepared from carbon fiber modified by chitosan deposited on the fiber surface in various forms were investigated. The electrochemical behavior of a composite modified with chitosan in the sulfate form differed from that of starting carbon fiber and composites modified by electrochemical deposition of chitosan. The preparation conditions and subsequent electrochemical treatment affected the thermal oxidative stability of the composites. It was noted that cyclic cathodic-anodic and then cathodic treatment of the composites degraded them significantly. Cyclic voltammetry could be used to assess the surface condition of fibers modified with chitosan.


Glass Physics and Chemistry | 2014

Functional materials based on manganese dioxide deposited on carbon fiber

L. A. Zemskova; A. V. Voyt; N. N. Barinov; T. A. Kaydalova

The composites manganese oxide/carbon fiber are obtained by chemical and electrochemical deposition. The process of electrodeposition was carried out in the presence of tetraalkylammonium cations of neutral SAA Triton X-100 in a potentiostatic regime by oxidating Mn2+ salts at +1.0 V (with respect to Ag/AgCl). Cathodic deposition was carried out in aqueous electrolytes NH4Cl and KCl and in the presence of polyelectrolyte of chitosan with oxidation of the formed precipitates by oxygen in air. The obtained composites are characterized by scanning electron microscopy, X-ray diffraction, and cyclic volt-amperometry techniques. The mechanism of film formation at the surface of the carbon fiber and the electrochemical properties of the composites are discussed.


Russian Journal of Applied Chemistry | 2012

Organic-Mineral Composites Copper Oxide/Chitosan/Carbon Fiber Obtained by the Electrodeposition Method

L. A. Zemskova; A. V. Voit; T. A. Kaidalova; N. N. Barinov; Yu. M. Nikolenko; Albert M. Ziatdinov

The methods of the coprecipitation of chitosan and copper-containing particles on a carbon fiber used as a cathode and also of the precipitation of copper(II) on a carbon-fiber electrode preliminarily modified by chitosan were studied for feasibility of obtaining composites containing copper oxide/copper in a chitosan matrix. The composition, morphology, structure of the organic-mineral composites were studied by the methods of X-ray phase analysis, scanning electronic microscopy, X-ray photoelectron spectroscopy, and ESR spectroscopy.

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A. V. Voit

Russian Academy of Sciences

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I. V. Sheveleva

Russian Academy of Sciences

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N. N. Barinov

Russian Academy of Sciences

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V. G. Kuryavyi

Russian Academy of Sciences

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V. I. Sergienko

Russian Academy of Sciences

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Yu. M. Nikolenko

Russian Academy of Sciences

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S. V. Zheleznov

Russian Academy of Sciences

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T. A. Kaidalova

Russian Academy of Sciences

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D. Kh. Shlyk

Russian Academy of Sciences

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A. V. Voyt

Russian Academy of Sciences

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