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Каталог книг и брошюр библиотеки ИФ СО РАН

Каталог журналов библиотеки ИФ СО РАН

Труды сотрудников ИФ СО РАН

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Electrospinning of polyhydroxyalkanoate fibrous scaffolds: effects on electrospinning parameters on structure and properties / T. . Volova [et al.] // J. Biomater. Sci.-Polym. Ed. - 2014. - Vol. 25, Is. 4. - P. 370-393, DOI 10.1080/09205063.2013.862400. - Cited References: 52. - This study was financially supported by Project 'Biotechnologies of novel biomaterials: innovative biopolymers and devices for biomedicine' (Agreement No. 1 of 15.02.2013 to Agreement No. 11.G34.31.0013) in accordance with Resolution No. 220 of the Government of the Russian Federation of April 9, 2010, 'On measures designed to attract leading scientists to the Russian institutions of higher learning' and Grant of the RF President for supporting young Doctors of Sciences No. MD-3112.2012.4. . - ISSN 0920-5063. - ISSN 1568-5624

РУБ Engineering, Biomedical + Materials Science, Biomaterials + Polymer Science
Рубрики:
TISSUE ENGINEERING APPLICATIONS
   FIBER MATS
   POLY 3-HYDROXYBUTYRATE
   POLY(3-HYDROXYBUTYRATE-CO-3-HYDROXYVALERATE)
   BIOCOMPATIBILITY
   PROLIFERATION
   FABRICATION
   NANOFIBERS
   COPOLYMERS
   MEMBRANES
Кл.слова (ненормированные):
electrospinning -- polyhydroxyalkanoates -- ultrafine fibers -- physical-mechanical properties -- fibroblast cells
Аннотация: IIn this study, electrospinning was used to prepare ultrafine fibers from PHAs with different chemical compositions: P(3HB) and copolymers: P(3HB-co-4HB), P(3HB-co-3HV), and P(3HB-co-3HHx). The main process parameters that influence ultrafine fiber diameter and properties (polymer concentration, solution feeding rate, working distance, and applied voltage) have been investigated and their effects evaluated. The study revealed electrospinning parameters for the production of high-quality ultrafine fibers and determined which parameters should be varied to tailor the properties of the products. This study is the first to compare biological and physical-mechanical parameters of PHAs with different chemical compositions as dependent upon the fractions of monomers constituting the polymers and ultrafine fiber orientation. Mechanical strength of aligned ultrafine fibers prepared from different PHAs is higher than that of randomly oriented ones; no significant effect of ultrafine fiber orientation on surface properties has been found. None of the fibrous scaffolds produced by electrospinning from PHAs had any adverse effects on attachment, growth, and viability of NIH 3T3 mouse fibroblast cells, and all of them were found to be suitable for tissue engineering applications.

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Держатели документа:
Russian Acad Sci, Inst Biophys, Siberian Branch, Krasnoyarsk 660036, Russia
Siberian Fed Univ, Inst Fundamental Biol & Biotechnol, Krasnoyarsk 660041, Russia
Russian Acad Sci, LV Kirenskii Inst Phys, Siberian Branch, Krasnoyarsk 660036, RussiaИФ СО РАН;

Доп.точки доступа:
Volova, T.; Волова, Татьяна Григорьевна; Goncharov, D.; Sukovatyi, A. G.; Суковатый, Алексей Григорьевич; Shabanov, A. V.; Шабанов, Александр Васильевич; Nikolaeva, E.; Shishatskaya, E.; Project 'Biotechnologies of novel biomaterials: innovative biopolymers and devices for biomedicine' [1, 11.G34.31.0013]; Government of the Russian Federation [220]; RF President for supporting young Doctors of Sciences [MD-3112.2012.4]
}
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    Atomic layer deposition ZnO on porous Al2O3 nanofibers film / A. S. Voronin, A. N. Masiygin, M. S. Molokeev, S. V. Khartov // J. Phys. Conf. Ser. - 2020. - Vol. 1679, Is. 2. - Ст. 022072DOI 10.1088/1742-6596/1679/2/022072. - Cited References: 10. - Studies by scanning electron microscopy and X-ray powder diffraction were performed on the equipment of Krasnoyarsk Regional Center of Research Equipment of Federal Research Center «Krasnoyarsk Science Center SB RAS». The transmission electron microscopy investigations were conducted in the SFU Joint Scientific Center supported by the State assignment (#FSRZ-2020-0011) of the Ministry of Science and Higher Education of the Russian Federation
   Перевод заглавия: Нанесение атомного слоя ZnO на пленку из пористых нановолокон Al2O3
Кл.слова (ненормированные):
Alumina -- Aluminum oxide -- Atomic layer deposition -- Atoms -- Composite structures -- High resolution transmission electron microscopy -- II-VI semiconductors -- Nanofibers -- Oxide minerals -- Scanning electron microscopy
Аннотация: The paper presents the results of the formation and study of the morphological and structural characteristics of the mesoporous ZnO / Al2O3 nanofibers film (ZANF). The deposition of a ZnO layer on Al2O3 nanofibers film (ANF) ~ 1 µm thick was carried out by the method of atomic layer deposition. The morphology of the mesoporous composite layer ZnO / Al2O3 (ZANF) has been studied by scanning and transmission electron microscopy. It is shown that in the process of atomic layer deposition, the ZnO layer grows according to the Stranski-Krastanov mechanism. A ZnO layer less than 5 nm thick gives an island structure in which Al2O3 nanofibers are uniformly coated with ZnO particles, an increase in the ZnO layer thickness to 15 nm demonstrates a continuous coating of Al2O3 nanofibers. The system has a core-shell structure. The resulting composite structures are promising for applications in photocatalysis and gas sensing.

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Держатели документа:
Federal Research Center Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences (KSC SB RAS), Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Reshetnev Siberian State University Science and Technology, Krasnoyarsk, 660037, Russian Federation
Kirensky Institute of Physics (FRC KSC SB RAS), Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Voronin, A. S.; Masiygin, A. N.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Khartov, S. V.; International Scientific Conference on Applied Physics, Information Technologies and Engineering(2nd ; 25 September - 4 October 2020 ; Krasnoyarsk, Russian Federation)
}
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The Influence of Alumina Nanofibers on the Physical and Mechanical Properties of Mineral-Filled Polyethylene: an Experimental Study / A. A. Kuular, M. M. Simunin, T. V. Bermeshev [et al.] // Tech. Phys. Lett. - 2020. - Vol. 46, Is. 12. - P. 1215-1218, DOI 10.1134/S1063785020120214. - Cited References: 6. - This study was supported by the Ministry of Science and Higher Education of the Russian Federation within the framework of a state order to the Smart Materials and Structures Research Laboratory on the subject “Development of Multifunctional Smart Materials and Structures Based on Modified Polymer Composites Capable to Operate under Extreme Conditions,” subject no. FEFE-2020-0015 . - ISSN 1063-7850
Кл.слова (ненормированные):
mineral-filled polyethylene -- alumina nanofibers -- physical and mechanical properties -- strength enhancement
Аннотация: Improvement of physical and mechanical characteristics of mineral-filled polyethylene (MFPE) upon addition of alumina nanofibers with a high aspect ratio has been experimental studied. It is shown that, at the weight concentration of alumina nanofibers of 0.1 wt %, the ultimate tensile strength increases from 3.82 ± 0.04 to 6.70 ± 0.07 MPa and the Young’s modulus increases from 1.08 ± 0.01 to 1.38 ± 0.01GPa (with respect to MFPE). The MFPE/Al2O3 nanofiber composite can be described within a model of weak adhesive interaction between a filler and a matrix with high friction.

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Публикация на русском языке Влияние нановолокон оксида алюминия на физико-механические свойства минералонаполненного полиэтилена: экспериментальное исследование [Текст] / А. А. Куулар, М. М. Симунин, Т. В. Бермешев [и др.] // Письма в Журн. техн. физ. - 2020. - T. 46 Вып. 24. - С. 7-10

Держатели документа:
Federal Research Center “Krasnoyarsk Science Center,” Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Reshetnev Siberian State University of Science and Technology, Krasnoyarsk, 660037, Russian Federation
Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation

Доп.точки доступа:
Kuular, A. A.; Simunin, M. M.; Bermeshev, T. V.; Voronin, A. S.; Dobrosmyslov, S. S.; Fadeev, Y. V.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Khartov, S. V.
}
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Metal dusting as a key route to produce functionalized carbon nanofibers / A. R. Potylitsyna, I. V. Mishakov, Y. I. Bauman [et al.] // React. Kinet. Mech. Catal. - 2022. - Vol. 135, Is. 3. - P. 1387-1404, DOI 10.1007/s11144-022-02169-y. - Cited References: 65. - This work was supported by the Ministry of Science and Higher Education of the Russian Federation (Project numbers AAAA-A21-121011390054-1 (ID: 0239-2021-0010) and 121031700315-2) . - ISSN 1878-5190. - ISSN 1878-5204

РУБ Chemistry, Physical
Рубрики:
CHLORINATED HYDROCARBONS
   NI-CU
   DECOMPOSITION
   NANOTUBES
   CATALYST
Кл.слова (ненормированные):
Metal dusting -- Ternary nickel-molybdenum-tungsten alloy -- Trichloroethylene -- Acetonitrile -- Functionalized carbon nanofibers
Аннотация: The present paper reports a new method of producing N-doped carbon nanofibers via metal dusting of a ternary NiMoW alloy in the atmosphere containing C2HCl3 and CH3CN vapors at 600 °C. The initial alloy was prepared by a co-precipitation technique. The carbon deposition was monitored gravimetrically. The early stages of the metal dusting process were studied in detail using scanning and transmission electron microscopies. It was established that the rapid disintegration of the microdispersed NiMoW alloy with the formation of nanosized particles catalyzing the growth of carbon filaments occurs within the first 5 min of the reaction. The presence of C2HCl3 vapors in the reaction medium was shown to be the urgent condition to provide efficient metal dusting. The effect of the CH3CN concentration in the trichloroethylene-containing reaction mixture on the carbon deposition is investigated. As observed, the CH3CN content noticeable affects the carbon yield (after 2 h of reaction). The dome-shaped dependence of carbon yield reaches its maximal value of ~ 200 g/g(cat) at a CH3CN concentration of 33 vol%. According to X-ray photoelectron spectroscopy, the obtained carbon filaments are functionalized with Cl (0.1–1.2 wt%), O (3–6 wt%), and N (0.5–1.3 wt%). The prepared carbon filaments possess a segmented secondary structure, which is typical for carbon nanomaterials derived via catalytic decomposition of chlorine-substituted hydrocarbons. Low-temperature nitrogen adsorption measurement revealed that the specific surface area of the N-containing samples varies in a range from 370 to 550 m2/g.

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Держатели документа:
Boreskov Inst Catalysis, Pr Ac Lavrentieva 5, Novosibirsk 630090, Russia.
Novosibirsk State Univ, Str Pirogova 2, Novosibirsk 630090, Russia.
Nikolaev Inst Inorgan Chem, Ac Lavrentieva 3, Novosibirsk 630090, Russia.
Kirensky Inst Phys, Akad Gorodok 50-38, Krasnoyarsk 660036, Russia.

Доп.точки доступа:
Potylitsyna, Arina R.; Mishakov, Ilya, V; Bauman, Yury, I; Kibis, Lidia S.; Shubin, Yury, V; Volochaev, M. N.; Волочаев, Михаил Николаевич; Melgunov, Maxim S.; Vedyagin, Aleksey A.; Ministry of Science and Higher Education of the Russian Federation [AAAA-A21-121011390054-1, 0239-2021-0010, 121031700315-2]
}
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The effect of copper and iron adsorption on the catalytic performance of alumina nanofiber / nanodiamond composite in sensing applications / N. O. Ronzhin, E. D. Posokhina, E. V. Mikhlina [et al.] // J. Phys. Chem. Solids. - 2022. - Vol. 167. - Ст. 110785, DOI 10.1016/j.jpcs.2022.110785. - Cited References: 68. - This work is supported by the Russian Foundation for Basic Research, Project 18–29–19078. The authors would like to express their special thanks to Krasnoyarsk Regional Center of Research Equipment of Federal Research Center «Krasnoyarsk Science Center SB RAS» for providing the equipment to ensure the accomplishment of this project . - ISSN 0022-3697
Кл.слова (ненормированные):
Nanodiamonds -- Alumina nanofibers -- Indicator system -- Copper ions -- Iron ions -- Phenol detection
Аннотация: Phenolic compounds are common environmental pollutants, which are used in many industries and contaminate water environment due to industrial wastewater discharge. Presently, there is an increasing demand for the development and improvement of inexpensive, easy-to-use analytical tools for in-situ detection of phenolic compounds. In this work, we investigate the effect of adsorption of Cu2+ and Fe2+ ions on the catalytic activity of a composite material based on alumina nanofibers (ANF) and detonation nanodiamonds (DND) in the co-oxidation of phenols with 4-aminoantipyrine in the presence of hydrogen peroxide. We have found more than two-fold increase of the catalytic activity for ANF + DND + Cu composite, while the activity of ANF + DND + Fe composite is found to decrease by several times in comparison with the original ANF + DND material. The results of FTIR analysis indicate that the adsorption of iron ions occurs with the formation of hydroxide surface groups and hydrogen bonds, which apparently block their catalytic activity in the Fenton redox cycle. The higher catalytic performance of AND + DND composite functionalized with copper ions makes it possible to detect two times lower concentrations of analytes (phenol and 4-chlorophenol) in comparison with the original composite. It is shown that the AND + DND + Cu composite provides a linear yield of the co-oxidation reaction product in a wide range of analyte concentrations (0.25–100 μM for phenol and 0.5–25 μM for 4-chlorophenol). Model experiments demonstrate the applicability of copper-functionalized composite as a reusable sensor for the determination of phenol in aqueous samples.

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Держатели документа:
Institute of Biophysics SB RAS, Akademgorodok 50/50, Krasnoyarsk, 660036, Russian Federation
Institute of Computational Modelling SB RAS, Akademgorodok 50/44, Krasnoyarsk, 660036, Russian Federation
Kirensky Institute of Physics SB RAS, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation
Federal Research Center KSC SB RAS, Akademgorodok 50/38, Krasnoyarsk, 660036, Russian Federation
Siberian Federal University, Svobodny 79, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Ronzhin, N. O.; Posokhina, E. D.; Mikhlina, E. V.; Shestakov, N. P.; Шестаков, Николай Петрович; Nemtsev, I. V.; Немцев, Иван Васильевич; Bondar, V. S.; Ryzhkov, I. I.
}
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Study of the effect of modified aluminum oxide nanofibers on the properties of PLA-based films / A. Sukhanova, A. Boyandin, N. Ertiletskaya [et al.] // Materials. - 2022. - Vol. 15, Is. 17. - Ст. 6097, DOI 10.3390/ma15176097. - Cited References: 37. - This research was carried out within the state assignment of the Ministry of Science and Higher Education of the Russian Federation for the implementation of the project “Development of multifunctional smart materials and structures based on modified polymer composite materials capable to function in extreme conditions” (project number FEFE-2020-0015) . - ISSN 1996-1944
Кл.слова (ненормированные):
aluminum oxide nanofibers -- percolation threshold -- polylactide -- film -- composite -- thermal and mechanical properties
Аннотация: To find out whether Al2O3 nanofiller is effective in improving the characteristics of polymer composites, composite polymer films based on biodegradable polylactide and epoxidized aluminum oxide nanofibers were obtained by solution casting. Surface morphology, mechanical and thermal properties of composites were studied by SEM, IR-Fourier spectroscopy, DSC and DMA. It was shown that, below and above the percolation threshold, the properties of the films differ significantly. The inclusion of alumina nanoparticles up to 0.2% leads to a plasticizing effect, a decrease in the crystallization temperature and the melting enthalpy and an increase in the tensile stress. An increase in the content of alumina nanoparticles in films above the percolation threshold (0.5%) leads to a decrease in the crystallinity of the films, an increase in stiffness and a drop in elasticity. Finding the percolation threshold of alumina nanoparticles in PLA films makes it possible to control their properties and create materials for various applications. The results of this study may have major significance for the commercial use of aluminum oxide nanofibers and can broaden the research field of composites.

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Держатели документа:
Scientific Laboratory “Smart Materials and Structures”, Reshetnev Siberian State University of Science and Technology, 31 Krasnoyarsky Rabochy Av, Krasnoyarsk, 660037, Russian Federation
Institute of Biophysics, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Department of Molecular Electronics, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
School of Engineering and Construction, Siberian Federal University, 82K Svobodnyi Av, Krasnoyarsk, 660041, Russian Federation
Kirensky Institute of Physics, Federal Research Center “Krasnoyarsk Science Center SB RAS”, 50/38 Akademgorodok, Krasnoyarsk, 660036, Russian Federation
Institute of Engineering Physics and Radio Electronics, Siberian Federal University, 79 Svobodnyi Av, Krasnoyarsk, 660041, Russian Federation
Insitute of Fundamental Biology and Biotechnology, Siberian Federal University, 79 Svobodnyi Av, Krasnoyarsk, 660041, Russian Federation

Доп.точки доступа:
Sukhanova, A.; Boyandin, A. N.; Ertiletskaya, N.; Simunin, M.; Shalygina, T.; Voronin, A.; Vasiliev, A. D.; Васильев, Александр Дмитриевич; Nemtsev, I.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Pyatina, S.
}
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    Rheological properties of colloidal suspensions of alumina nanofibers / A. V. Minakov, M. I. Pryazhnikov, M. M. Simunin [et al.] // J. Mol. Liq. - 2022. - Vol. 367. - Ст. 120385, DOI 10.1016/j.molliq.2022.120385. - Cited References: 62. - This work is partially financed by Ministry of Science and Higher Education of the Russian Federation (project no. FSRZ-2020-0012) . - ISSN 0167-7322
   Перевод заглавия: Реологические свойства коллоидных суспензий нановолокон оксида алюминия
Кл.слова (ненормированные):
Alumina nanofibers -- Rheological properties -- Shear viscosity -- Bulk viscosity -- Colloidal stability
Аннотация: We have studied the rheological properties of colloidal suspensions based alumina nanofibers (ANF) with a mass fraction of 0.125–2 wt%. The ANFs used in this work are stand out by a high aspect ratio L/D ∼ 106–107 (dry ANF before dispersion) and ease of dispersion due to the self-organized aligned structure of ANF, which is characteristic of our synthesis method. It was shown that ANF suspensions are characterized by high colloidal stability, zeta potential has a significant dependence on ANF volume fraction. ANF have a strong effect on the shear viscosity of colloidal suspensions; non-Newtonian behavior is observed in suspensions with an ANF mass fraction of 0.5 wt%. A comprehensive study of the propagation of ultrasound in ANF suspensions was carried out. Based on experimental results on the scattering of ultrasound in suspensions and theoretical calculations, data on the bulk viscosity of ANF suspensions were obtained for the first time. The results of the study allow us to judge the possibility of using ANF as a promising fibrous additive to optimize the rheological properties of suspensions for various technical purposes, which include drilling muds, paint and varnish compositions, concrete-cement mixtures.

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Держатели документа:
Siberian Federal University, Krasnoyarsk, 660041, Russian Federation
Kutateladze Institute of Thermophysics, SB RAS, Novosibirsk, 630090, Russian Federation
Krasnoyarsk Scientific Center, Siberian Branch, Russian Academy of Sciences (KSC SB RAS), Krasnoyarsk, 660036, Russian Federation
Reshetnev Siberian State University of Science and Technology (Reshetnev University), Krasnoyarsk, 660037, Russian Federation
Institute of Chemistry and Chemical Technology, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
L.V. Kirensky Institute of Physics, Siberian Branch, Russian Academy of Sciences, Krasnoyarsk, 660036, Russian Federation
Bauman Moscow State Technical University, Moscow, 105005, Russian Federation

Доп.точки доступа:
Minakov, A. V.; Pryazhnikov, M. I.; Simunin, M. M.; Dobrosmyslov, S. S.; Kuular, A. A.; Molokeev, M. S.; Молокеев, Максим Сергеевич; Volochaev, M. N.; Волочаев, Михаил Николаевич; Khartov, S. V.; Voronin, A. S.
}
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Effect of Cu on performance of self-dispersing Ni-catalyst in production of carbon nanofibers from ethylene / S. D. Afonnikova, Yu. I. Bauman, V. O. Stoyanovskii [et al.] // C – J. Carbon Res. - 2023. - Vol. 9, Is. 3 : Advanced Carbon Nanomaterials and Hybrids. - Ст. 77, DOI 10.3390/c9030077. - Cited References: 72. - This work was supported by the Ministry of Science and Higher Education of the Russian Federation within the governmental order for Boreskov Institute of Catalysis (project AAAA-A21-121011390054-1). The physicochemical characterization of samples was supported by the Russian Science Foundation (project No. 22-13-00406, https://rscf.ru/en/project/22-13-00406/BIC SB RAS (accessed on 30 March 2023)). - Analysis of the physicochemical properties of the samples was performed using the equipment of the ‘National Center for Catalyst Research’ (Novosibirsk, BIC SB RAS) and Krasnoyarsk regional Center of the Collective Use (KSS SB RAS). The authors are grateful to A.N. Serkova for the performed SEM studies, B.A. Kolesov for the Raman spectra data, to A.B. Ayupov for analyzing samples by low-temperature adsorption/desorption of nitrogen, to Y.V. Shubin for the XRD analysis and to E.I. Belyaeva for the particle distribution analysis . - ISSN 2311-5629
Кл.слова (ненормированные):
nickel-copper alloys -- carbon erosion -- catalytic pyrolysis -- carbon nanofibers -- segmented structure
Аннотация: The development of effective catalysts for the pyrolysis of light hydrocarbons with the production of carbon nanomaterials represents a relevant direction. In the present work, the influence of copper addition on performance of a self-dispersed Ni-catalyst and structural features of the obtained carbon nanofibers (CNFs) was studied. The precursors of Ni and Ni-Cu catalysts were prepared by activation of metal powders in a planetary mill. During contact with the C2H4/H2 reaction mixture, a rapid disintegration of the catalysts with the formation of active particles catalyzing the growth of CNFs has occurred. The kinetics of CNF accumulation during ethylene decomposition on Ni- and Ni-Cu catalysts was studied. The effect of temperature on catalytic performance was explored and it was shown that introduction of copper promotes 1.5–2-fold increase in CNFs yield in the range of 525–600 °C; the maximum CNFs yield (100 g/gcat and above, for 30-min reaction) is reached on Ni-Cu-catalyst at 575–600 °C. A comparative analysis of the morphology and structure of CNF was carried out using electron microscopy methods. The growth mechanism of carbon filaments in the shape of “railway crossties” on large nickel crystals (d > 250 nm) was proposed. It was found that the addition of copper leads to a decrease in the bulk density of the carbon product from 40–60 to 25–30 g/L (at T = 550–600 °C). According to the low-temperature nitrogen adsorption data, specific surface area (SSA) of CNF samples (at T ˂ 600 °C) lies in the range of 110–140 m2/g, regardless of the catalyst composition; at T = 600 °C the introduction of copper contributed to an increase in the specific surface of CNF by 100 m2/g.

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Держатели документа:
Boreskov Institute of Catalysis SB RAS, 5 Lavrentyev Ave., Novosibirsk 630090, Russia
Kirensky Institute of Physics, Akademgorodok, 50/38, Krasnoyarsk 660036, Russia

Доп.точки доступа:
Afonnikova, S. D.; Bauman, Yury I.; Stoyanovskii, Vladimir O.; Volochaev, M. N.; Волочаев, Михаил Николаевич; Mishakov, Ilya V.; Vedyagin, Aleksey A.
}
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