Výsledky vyhledávání - "N. O. Khmelevsky"

Electrospun ZnO/Pd Nanofibers: CO Sensing and Humidity Effect

Autor: Marina Rumyantseva, N. O. Khmelevsky, Vadim Platonov, Alexander Gaskov

Publikováno v: Sensors
Volume 20
Issue 24
Sensors (Basel, Switzerland)
Sensors, Vol 20, Iss 7333, p 7333 (2020)

Variable air humidity affects the characteristics of semiconductor metal oxides, which complicates the reliable and reproducible determination of CO content in ambient air by resistive gas sensors. In this work, we determined the sensor properties of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cab27676f3fa9c7c56746170e5f39d64

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Synergy Effect of Au and SiO2 Modification on SnO2 Sensor Properties in VOCs Detection in Humid Air

Autor: Alexander Gaskov, Marina Rumyantseva, N. O. Khmelevsky, Dayana Gulevich, Evgeny Gerasimov, Elena Tsvetkova

Publikováno v: Nanomaterials
Volume 10
Issue 4
Nanomaterials, Vol 10, Iss 813, p 813 (2020)

Nanocomposites based on Au- and SiO2-modified SnO2 were studied as sensitive materials for ethanol and benzene detection in dry (RH = 1%) and humid (RH = 20%) air. Modification of SnO2 by amorphous SiO2 (13 mol.%) was effectuated by hydrothermal synt

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Sub-ppm H_{2}S$ sensing by tubular ZnO-Co_{3}O_{4}$ nanofibers

Autor: A.S. Chizhov, N. O. Khmelevsky, S.A. Vladimirova, Alexander Gaskov, Vadim Platonov, Maria Batuk, Joke Hadermann, Marina Rumyantseva

Publikováno v: Sensors and actuators : B : chemical

Tubular ZnO – Co3O4 nanofibers were co-electrospun from polymer solution containing zinc and cobalt acetates. Phase composition, cobalt electronic state and element distribution in the fibers were investigated by XRD, SEM, HRTEM, HAADF-STEM with ED

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b15cda83304fbc581c67ba517cdf882a
https://hdl.handle.net/10067/1664490151162165141

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Cooperative effect of PdOx and SiO2 in CO detection by SnO2-based gas sensors: Thorough operando DRIFTS analysis

Autor: Dayana Gulevich, Marina Rumyantseva, Evgeny Yu. Gerasimov, N. O. Khmelevsky, Artem Marikutsa

Publikováno v: Journal of Alloys and Compounds. 893:162297

This work is devoted to the study of the joint effect of SiO2 and PdOx on the SnO2 sensor properties when detecting CO in dry and humid air. Nanocrystalline SnO2 was obtained by wet chemical synthesis, modification with SiO2 was effectuated during hy

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9499b8f82a3f03b19ed6b64d90314455
https://doi.org/10.1016/j.jallcom.2021.162297

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Cobalt location in p-CoOx/n-SnO2 nanocomposites: Correlation with gas sensor performances

Autor: S.A. Vladimirova, Marina Rumyantseva, Elizaveta A. Konstantinova, Olesia M. Karakulina, Alexander Gaskov, Joke Hadermann, A.S. Chizhov, V.F. Kozlovsky, A.V. Marchevsky, N. O. Khmelevsky, D. G. Filatova

Publikováno v: Journal of alloys and compounds

Nanocomposites CoOx/SnO2 based on tin oxide powders with different crystallinity have been prepared by wet chemical synthesis and characterized in detail by ICP-MS, XPS, EPR, XRD, HAADF-STEM imaging and EDX-STEM mapping. It was shown that cobalt is d

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https://doi.org/10.1016/j.jallcom.2017.05.332

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Effective concentration of electrons in metals upon measurements via positron annihilation spectroscopy

Autor: V. I. Grafutin, N. O. Khmelevsky, E. P. Prokopiev

Publikováno v: Journal of Surface Investigation: X-ray, Synchrotron and Neutron Techniques. 11:120-124

Calculations are performed together with the summarization of published data on the measurement of positron annihilation rates in a number of simple substances. The information potential of different methods underlying positron annihilation spectrosc

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https://doi.org/10.1134/s1027451016050505

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Organic-Inorganic Hybrid Materials for Room Temperature Light-Activated Sub-ppm NO Detection

Autor: Alexander Gaskov, Marina Rumyantseva, Olga A. Fedorova, Sergey Tokarev, Abulkosim Nasriddinov, Polina Yaltseva, Tatyana B. Shatalova, N. O. Khmelevsky

Publikováno v: Nanomaterials
Volume 10
Issue 1
Nanomaterials, Vol 10, Iss 1, p 70 (2019)

Nitric oxide (NO) is one of the main environmental pollutants and one of the biomarkers noninvasive diagnosis of respiratory diseases. Organic-inorganic hybrids based on heterocyclic Ru (II) complex and nanocrystalline semiconductor oxides SnO2 and I

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Autor: Alexander Gaskov, Marina Rumyantseva, Artem Marikutsa, Elizaveta A. Konstantinova, Lili Yang, N. O. Khmelevsky

Publikováno v: Sensors (Basel, Switzerland)
Sensors
Volume 19
Issue 15
Sensors, Vol 19, Iss 15, p 3405 (2019)

Tungsten oxide is a renowned material for resistive type gas sensors with high sensitivity to nitrogen oxides. Most studies have been focused on sensing applications of WO3 for the detection of NO2 and a sensing mechanism has been established. Howeve

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a74da801a1eb8aaf24ee58b0294e9d9e
http://europepmc.org/articles/PMC6696453

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