Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Hristo Kolev"'
Publikováno v:
Inorganics, Vol 12, Iss 9, p 244 (2024)
Research on tribocatalysis, which involves the triboelectric effect, is based on the concept that friction between dissimilar materials can generate charges capable of initiating catalytic reactions. This phenomenon holds significant potential for th
Externí odkaz:
https://doaj.org/article/c7e5fb7146e94a55a4d418a4f6dc6566
Publikováno v:
Molecules, Vol 29, Iss 16, p 3913 (2024)
Tribocatalysis is an emerging advanced oxidation process that utilizes the triboelectric effect, based on friction between dissimilar materials to produce charges that can initiate various catalytic reactions. In this study, pure and rare-earth-modif
Externí odkaz:
https://doaj.org/article/86e83446615e4858bb25736f9b71a12c
Autor:
Miloš Ognjanović, Marko Bošković, Hristo Kolev, Biljana Dojčinović, Sanja Vranješ-Đurić, Bratislav Antić
Publikováno v:
Nanomaterials, Vol 14, Iss 9, p 782 (2024)
Here, we present the results of the synthesis, surface modification, and properties analysis of magnetite-based nanoparticles, specifically Co0.047Fe2.953O4 (S1) and Co0.086Fe2.914O4 (S2). These nanoparticles were synthesized using the co-precipitati
Externí odkaz:
https://doaj.org/article/a9019b1114514360b2c9e9c2e4faff27
Autor:
Ralitsa Velinova, Silviya Todorova, Daniela Kovacheva, Hristo Kolev, Yordanka Karakirova, Pavel Markov, Katerina Tumbalova, Georgi Ivanov, Anton Naydenov
Publikováno v:
Materials, Vol 16, Iss 20, p 6784 (2023)
New results on the effect of TiO2 on Pd/La2O3-CeO2-Al2O3 systems for catalytic oxidation of methane in the presence of H2O and SO2 have been received. Low-temperature N2-adsorption, XRD, SEM, HRTEM, XPS, EPR and FTIR techniques were used to character
Externí odkaz:
https://doaj.org/article/425b5a77e17747ec963f39c582a4751b
Autor:
Margarita Gabrovska, Dimitrinka Nikolova, Hristo Kolev, Daniela Karashanova, Peter Tzvetkov, Blagoy Burdin, Emiliya Mladenova, Daria Vladikova, Tatyana Tabakova
Publikováno v:
Nanomaterials, Vol 13, Iss 11, p 1781 (2023)
Yttrium-doped barium cerate (BCY15) was used as ceramic matrix to obtain Ni/BCY15 anode cermet for application in proton-conducting solid oxide fuel cells (pSOFC). Ni/BCY15 cermets were prepared in two different types of medium, namely deionized wate
Externí odkaz:
https://doaj.org/article/ce63234d0dd14185b6323b7df00efded
Autor:
Veronika V. Tomina, Iryna M. Furtat, Anastasia P. Lebed, Sofiya S. Kotsyuda, Hristo Kolev, Maria Kanuchova, Dominika Marcin Behunova, Miroslava Vaclavikova, Inna V. Melnyk
Publikováno v:
ACS Omega, Vol 5, Iss 25, Pp 15290-15300 (2020)
Externí odkaz:
https://doaj.org/article/6fc0358863384b7f8f87d62c6b8918b8
Autor:
Silviya Todorova, Anton Naydenov, Maya Shopska, Hristo Kolev, Iliyana Yordanova, Krasimir Tenchev
Publikováno v:
Symmetry, Vol 14, Iss 12, p 2543 (2022)
One of the current problems in the environmental catalysis is the design of an effective and less costly catalytic system for the oxidation of CO. The nano-sized α-Mn2O3 oxide has been prepared and modified with 0.5 wt.% Pt. The catalysts have been
Externí odkaz:
https://doaj.org/article/8c23db4b02234312b15b53892450f428
Autor:
Helena Brunckova, Erika Mudra, Magdalena Streckova, Lubomir Medvecky, Tibor Sopcak, Ivan Shepa, Alexandra Kovalcikova, Maksym Lisnichuk, Hristo Kolev
Publikováno v:
Nanomaterials, Vol 12, Iss 16, p 2817 (2022)
The present study is focused on the synthesis and structural properties of amorphous terbium metal–organic framework thin film (TbMOF-TF) and its transformation to terbium oxide by pyrolysis at 450 °C in the air. The crystalline (cTbMOF) and amorp
Externí odkaz:
https://doaj.org/article/80088d9cb8dc411984b2834a01c455ac
Autor:
Helena Brunckova, Erika Mudra, Lucas Rocha, Eduardo Nassar, Willian Nascimento, Hristo Kolev, Maksym Lisnichuk, Alexandra Kovalcikova, Zuzana Molcanova, Magdalena Strečkova, Lubomir Medvecky
Publikováno v:
Inorganics, Vol 9, Iss 10, p 77 (2021)
This study presents the synthesis, structural and luminescence properties for lanthanide metal–organic frameworks (LnMOFs), which belong to the sub-class of coordination polymers. The series of nanosized LnMOFs (Ln = Eu, Gd, Tb, Eu0.5Gd0.5, Tb0.5Gd
Externí odkaz:
https://doaj.org/article/80022745450c4279835eefb2e20dc1ec
Autor:
Dominika Marcin Behunová, George Gallios, Vladimír Girman, Hristo Kolev, Mária Kaňuchová, Silvia Dolinská, Miroslava Václavíková
Publikováno v:
Nanomaterials, Vol 11, Iss 7, p 1779 (2021)
We demonstrated the deposition of the architecture of graphene oxide on stainless steel substrate and its potential environmental application. The synthesis and characterization of graphene oxide were described. The controlled formation of graphene o
Externí odkaz:
https://doaj.org/article/0ca5485a6e1e46e781b45a9db6f4d605