Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Sergey V. Nekipelov"'
Autor:
Nadezhda A. Zhuk, Sergey V. Nekipelov, Olga V. Petrova, Aleksandra V. Koroleva, Aleksey M. Lebedev, Boris A. Makeev
Publikováno v:
Chemistry, Vol 6, Iss 5, Pp 1078-1088 (2024)
A cubic pyrochlore with the composition Bi1.865Co1/2Fe1/2Ta2O9+Δ (space group Fd-3m, a = 10.5013(8) Å) was synthesized from oxide precursors using solid-phase reactions. These ceramics are characterized by a porous microstructure formed by randomly
Externí odkaz:
https://doaj.org/article/87d81404ad274309b12438067734dbab
Autor:
Nadezhda A. Zhuk, Boris A. Makeev, Aleksandra V. Koroleva, Sergey V. Nekipelov, Olga V. Petrova
Publikováno v:
Chemistry, Vol 6, Iss 2, Pp 323-332 (2024)
Co doped bismuth magnesium tantalate with a pyrochlore structure (sp. gr. Fd-3m) was synthesized for the first time using the standard ceramic method. Single phase Bi2Mg1−xCoxTa2O9 samples were found to be formed when x < 0.7 in the X-ray phase ana
Externí odkaz:
https://doaj.org/article/74ac746bdca8456a9ffd4cb6f3278d9f
Autor:
Nadezhda A. Zhuk, Boris A. Makeev, Aleksandra V. Koroleva, Aleksey M. Lebedev, Olga V. Petrova, Sergey V. Nekipelov, Viktor N. Sivkov
Publikováno v:
Inorganics, Vol 12, Iss 3, p 74 (2024)
Two series of the bismuth tantalate pyrochlore samples, codoped with Mg,Mn and Zn,Mn, were synthesized via solid-phase reaction. It was established that the Bi2Mg(Zn)xMn1−xTa2O9.5−Δ (x = 0.3; 0.5; 0.7) samples contain the main phase of cubic pyr
Externí odkaz:
https://doaj.org/article/77c3473042514b0eb370d3ba91eaff82
Autor:
Nadezhda A. Zhuk, Boris A. Makeev, Maria G. Krzhizhanovskaya, Sergey V. Nekipelov, Danil V. Sivkov, Ksenia A. Badanina
Publikováno v:
Crystals, Vol 13, Iss 8, p 1202 (2023)
The phase formation process of Bi2Cr1/6Mn1/6Fe1/6Co1/6Ni1/6Cu1/6Nb2O9+Δ containing 3d-ions of transition elements in equimolar quantities was studied in a wide temperature range (400–1050 °C). The complex oxide crystallizes in the structural type
Externí odkaz:
https://doaj.org/article/a79265fadbff45b188aeda7417db3227
Autor:
Sergey V. Nekipelov, Victor N. Sivkov, Danil V. Sivkov, Alexey M. Lebedev, Ratibor G. Chumakov, Aleksandra V. Koroleva, Boris A. Makeev, Nadezhda A. Zhuk
Publikováno v:
Inorganics, Vol 11, Iss 7, p 285 (2023)
The effect of Zn-doping on the phase composition and optical properties of the Bi2ZnxFe1-xTa2O9.5-Δ (x = 0.3, 0.5, 0.7) was studied. XRD data showed that the samples crystallize in the structural type of pyrochlore (sp. gr.Fd-3m). For all the sample
Externí odkaz:
https://doaj.org/article/9833b3e70d4c43f09bef474331c7c295
Autor:
Nadezhda A. Zhuk, Maria G. Krzhizhanovskaya, Nikolay A. Sekushin, Vladislav V. Kharton, Alexandra V. Koroleva, Sergey V. Nekipelov, Danil V. Sivkov, Viktor N. Sivkov, Boris A. Makeev, Alexey M. Lebedev, Ratibor G. Chumakov, Sofia Yu. Kovalenko
Publikováno v:
ACS Omega, Vol 6, Iss 36, Pp 23262-23273 (2021)
Externí odkaz:
https://doaj.org/article/734e8585f94f48c3b30a33e5f47e7094
Autor:
Vitaliy A. Muravyov, Maria G. Krzhizhanovskaya, Boris A. Makeev, Andrey N. Nizovtsev, Sergey V. Nekipelov, Viktor N. Sivkov, Danil V. Sivkov, Nadezhda A. Zhuk
Publikováno v:
Crystals, Vol 13, Iss 3, p 474 (2023)
The possibility of high-temperature solid-phase synthesis of Ni-doped bismuth tantalate pyrochlore, not only from the oxide compounds BiTaO4 and NiO but also using nickel chloride NiCl2 as a precursor, was shown for the first time. The concentration
Externí odkaz:
https://doaj.org/article/518dcbcbc2f64424b445cd20f1718034
Autor:
Olga V. Petrova, Danil V. Sivkov, Sergey V. Nekipelov, Alexander S. Vinogradov, Petr M. Korusenko, Sergey I. Isaenko, Roman N. Skandakov, Ksenia A. Bakina, Viktor N. Sivkov
Publikováno v:
Applied Sciences, Vol 13, Iss 1, p 128 (2022)
The results of studies of marine sponge carbonization processes during thermal treatment in an argon atmosphere in the temperature range from room temperature to 1200 °C are presented. The spatial structure, atomic composition of native and carboniz
Externí odkaz:
https://doaj.org/article/84adb3de46a946d7b20be1754e4b74bb
Autor:
Danil V. Sivkov, Olga V. Petrova, Sergey V. Nekipelov, Alexander S. Vinogradov, Roman N. Skandakov, Ksenia A. Bakina, Sergey I. Isaenko, Anatoly M. Ob’edkov, Boris S. Kaverin, Ilya V. Vilkov, Viktor N. Sivkov
Publikováno v:
Applied Sciences, Vol 12, Iss 15, p 7744 (2022)
The results of the comparative quantitative study of oxygen-containing groups adsorbed on the surface of carbonized sponge scaffold (CSS), highly oriented pyrolytic graphite (HOPG), fullerite C60 and multi-walled carbon nanotubes (MWCNTs) introduced
Externí odkaz:
https://doaj.org/article/2b5ee5fdc09a4f5cbc11fd7c3ac99b64
Autor:
Nadezhda A. Zhuk, Sofia Yu. Kovalenko, Roman I. Korolev, Boris A. Makeev, Maria G. Krzhizhanovskaya, Danil V. Sivkov, Sergey V. Nekipelov, Viktor N. Sivkov, Maria V. Yermolina
Publikováno v:
ACS Omega. 8:11351-11363
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cfbe0c75ddeaf4a99c791466495f740a
https://doi.org/10.1021/acsomega.3c00090
https://doi.org/10.1021/acsomega.3c00090