G. Yu. Simenyuk

ORCID: 0000-0003-4066-0778
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About
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Research Areas
  • Supercapacitor Materials and Fabrication
  • Material Properties and Applications
  • Conducting polymers and applications
  • Nanomaterials for catalytic reactions
  • Advancements in Battery Materials
  • Catalytic Processes in Materials Science
  • Advanced Theoretical and Applied Studies in Material Sciences and Geometry
  • Nanotechnology research and applications
  • Catalysis and Hydrodesulfurization Studies
  • Electrocatalysts for Energy Conversion
  • Laser-Ablation Synthesis of Nanoparticles
  • nanoparticles nucleation surface interactions
  • Graphene research and applications
  • Extraction and Separation Processes
  • Graphene and Nanomaterials Applications
  • Polymer Nanocomposites and Properties
  • Tribology and Wear Analysis
  • Advanced Sensor and Energy Harvesting Materials
  • Electrochemical sensors and biosensors
  • Nanomaterials and Printing Technologies
  • Aerogels and thermal insulation
  • Carbon Nanotubes in Composites
  • Mineral Processing and Grinding
  • Dielectric materials and actuators
  • Physical Education and Training Studies

Institute of Coal of the Siberian Branch of the RAS
2002-2024

Siberian Branch of the Russian Academy of Sciences
2013-2024

Federal Research Centre Coal and Coal Chemistry
2015-2024

Kemerovo State University
2022

Russian Academy of Sciences
2002-2021

Institute of Coal Chemistry
2013-2014

Institute of Solid State Chemistry and Mechanochemistry
2004-2006

Au/C nanocomposites have been obtained by the ultrasonic assisted reduction of HAuCl4 solutions, impregnated in carbon material pores, using NaBH4 as a reducing agent. It was established that conditions nanocomposite (NC) synthesis exert an essential influence on shape and size characteristics Au filler functional properties NCs. Characterization NCs X-ray diffraction, small-angle scattering, cyclic voltammetry methods has revealed increase concentration raises not only gold nanoparticle...

10.1080/10426914.2015.1004694 article EN Materials and Manufacturing Processes 2015-01-26

Nanostructured Fе-Pt/С composites based on a carbon matrix with filler content of 1 wt%, and the molar ratio Pt/Fe components equal to 9 : have been obtained by joint reduction aqueous solutions precursors (hydrogen hexachloroplatinate(IV) iron(II) sulphate) an alkaline solution hydrazine hydrate at temperature 90-95 °C. The was mainly microporous sorbent (SAK) synthesized high-temperature activation anthracite from Kuznetsk coal basin. formation Fе-Pt nanophase initial stages synthesis has...

10.15372/csd2024615 article EN Химия в интересах устойчивого развития 2024-12-28

Herein, nanostructured composites (NSCs) based on multiwalled carbon nanotubes (MWCNTs) filled with the individual (IH) and mixed (MH) Ni/Co hydroxides nanoparticles are prepared an influence of NSC morphology texture their electrical capacitance is considered. It found that MWCNTs have a channel diameter (2−5 nm), external (18−23 wall width (2−12 nm). In NSCs obtained by precipitation from chloride aqueous solutions in alkaline medium, filler particles formed as nanocrystallites inside...

10.1002/ente.202100449 article EN Energy Technology 2021-09-12

Carbon nanotubes are widely employed as catalyst supports and electrode materials. In our earlier studies, capacitance characteristics of carbon (CNTs) nitrogen-doped (N-CNTs) were measured. Voltammetric curves obtained for in an acid electrolyte showed pseudocapacitance peaks that caused by electrochemical processes involving nitrogen-containing functional groups. this study, measurements made a two-electrode cell supercapacitor with hydrophilic polypropylene PORP-A1 film serving separator...

10.18321/ectj663 article EN Eurasian Chemico-Technological Journal 2017-09-30

A simple and reproducible method of chemical deposition was used to modify carbon nanotubes cobalt nickel hydroxides. Thus the composites containing 5 10 wt.% Co0.5Ni0.5(OH)2(the ratio hydroxides1:1)were obtained based on matrix multiwall nanotubes: non-functionalized (MWCNT) functionalized (MWCNT-f). The physicochemical properties nanocomposites were investigated with a focus characteristics that are relevant for use as electrode materials supercapacitors. Electrical capacity (specific...

10.18321/ectj1323 article EN cc-by Eurasian Chemico-Technological Journal 2022-07-25

Carbon matrix nanocomposites C / Au and MnxOy are obtained by a reduction of HAuCl4 KMnO4 precursor solutions with single-walled carbon nanotubes or highly porous materials high-temperature alkaline activation various metamorphism degree coals. The morphology the nanocomposite is studied electron microscopy. It found that filler introduction slightly reduces specific surface matrices and, due to blocking meso- micropore volumes, nanoparticles do not precipitate in pores predominantly...

10.22226/2410-3535-2023-1-20-27 article EN cc-by Letters on Materials 2023-03-01

The article reports the results of study morphology, porous structure and electrical capacitance characteristics highly carbon matrices (HPCMs) obtained from coal raw materials with different degrees metamorphism nanostructured composites (NSCs) based on them, surface which is decorated gold or manganese oxide nanosized particles (NP), accumulating charge during polarization in electrolyte via two mechanisms (formation an double layer (EDL) involvement pseudo-capacitance component Red-Ox...

10.15372/csd2023495 article EN Химия в интересах устойчивого развития 2023-10-31
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