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Nanocomposites SnO(2)/SiO(2) for CO Gas Sensors: Microstructure and Reactivity in the Interaction with the Gas Phase

Nanocomposites SnO(2)/SiO(2) with a silicon content of [Si]/([Sn] + [Si]) = 3/86 mol.% were obtained by the hydrothermal method. The composition and microstructure of the samples were characterized by EDX, XRD, HRTEM and single-point Brunauer-Emmet-Teller (BET) methods. The surface sites were invest...

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Autores principales: Gulevich, Dayana, Rumyantseva, Marina, Gerasimov, Evgeny, Marikutsa, Artem, Krivetskiy, Valeriy, Shatalova, Tatyana, Khmelevsky, Nikolay, Gaskov, Alexander
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6480095/
https://www.ncbi.nlm.nih.gov/pubmed/30987046
http://dx.doi.org/10.3390/ma12071096
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author Gulevich, Dayana
Rumyantseva, Marina
Gerasimov, Evgeny
Marikutsa, Artem
Krivetskiy, Valeriy
Shatalova, Tatyana
Khmelevsky, Nikolay
Gaskov, Alexander
author_facet Gulevich, Dayana
Rumyantseva, Marina
Gerasimov, Evgeny
Marikutsa, Artem
Krivetskiy, Valeriy
Shatalova, Tatyana
Khmelevsky, Nikolay
Gaskov, Alexander
author_sort Gulevich, Dayana
collection PubMed
description Nanocomposites SnO(2)/SiO(2) with a silicon content of [Si]/([Sn] + [Si]) = 3/86 mol.% were obtained by the hydrothermal method. The composition and microstructure of the samples were characterized by EDX, XRD, HRTEM and single-point Brunauer-Emmet-Teller (BET) methods. The surface sites were investigated using thermal analysis, FTIR and XPS. It is shown that the insertion of silicon dioxide up to the value of [Si]/([Sn] + [Si]) = 19 mol.% stabilizes the growth of SnO(2) nanoparticles during high-temperature annealing, which makes it possible to obtain sensor materials operating stably at different temperature conditions. The sensor properties of SnO(2) and SnO(2)/SiO(2) nanocomposites were studied by in situ conductivity measurements in the presence of 10–200 ppm CO in dry and humid air in the temperature range of 150–400 °C. It was found that SnO(2)/SiO(2) nanocomposites are more sensitive to CO in humid air as compared to pure SnO(2), and the sample with silicon content [Si]/([Sn] + [Si]) = 13 mol.% is resistant to changes in relative air humidity (RH = 4%–65%) in the whole temperature range, which makes it a promising sensor material for detecting CO in real conditions. The results are discussed in terms of the changes in the composition of surface-active groups, which alters the reactivity of the obtained materials.
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spelling pubmed-64800952019-04-29 Nanocomposites SnO(2)/SiO(2) for CO Gas Sensors: Microstructure and Reactivity in the Interaction with the Gas Phase Gulevich, Dayana Rumyantseva, Marina Gerasimov, Evgeny Marikutsa, Artem Krivetskiy, Valeriy Shatalova, Tatyana Khmelevsky, Nikolay Gaskov, Alexander Materials (Basel) Article Nanocomposites SnO(2)/SiO(2) with a silicon content of [Si]/([Sn] + [Si]) = 3/86 mol.% were obtained by the hydrothermal method. The composition and microstructure of the samples were characterized by EDX, XRD, HRTEM and single-point Brunauer-Emmet-Teller (BET) methods. The surface sites were investigated using thermal analysis, FTIR and XPS. It is shown that the insertion of silicon dioxide up to the value of [Si]/([Sn] + [Si]) = 19 mol.% stabilizes the growth of SnO(2) nanoparticles during high-temperature annealing, which makes it possible to obtain sensor materials operating stably at different temperature conditions. The sensor properties of SnO(2) and SnO(2)/SiO(2) nanocomposites were studied by in situ conductivity measurements in the presence of 10–200 ppm CO in dry and humid air in the temperature range of 150–400 °C. It was found that SnO(2)/SiO(2) nanocomposites are more sensitive to CO in humid air as compared to pure SnO(2), and the sample with silicon content [Si]/([Sn] + [Si]) = 13 mol.% is resistant to changes in relative air humidity (RH = 4%–65%) in the whole temperature range, which makes it a promising sensor material for detecting CO in real conditions. The results are discussed in terms of the changes in the composition of surface-active groups, which alters the reactivity of the obtained materials. MDPI 2019-04-02 /pmc/articles/PMC6480095/ /pubmed/30987046 http://dx.doi.org/10.3390/ma12071096 Text en © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Gulevich, Dayana
Rumyantseva, Marina
Gerasimov, Evgeny
Marikutsa, Artem
Krivetskiy, Valeriy
Shatalova, Tatyana
Khmelevsky, Nikolay
Gaskov, Alexander
Nanocomposites SnO(2)/SiO(2) for CO Gas Sensors: Microstructure and Reactivity in the Interaction with the Gas Phase
title Nanocomposites SnO(2)/SiO(2) for CO Gas Sensors: Microstructure and Reactivity in the Interaction with the Gas Phase
title_full Nanocomposites SnO(2)/SiO(2) for CO Gas Sensors: Microstructure and Reactivity in the Interaction with the Gas Phase
title_fullStr Nanocomposites SnO(2)/SiO(2) for CO Gas Sensors: Microstructure and Reactivity in the Interaction with the Gas Phase
title_full_unstemmed Nanocomposites SnO(2)/SiO(2) for CO Gas Sensors: Microstructure and Reactivity in the Interaction with the Gas Phase
title_short Nanocomposites SnO(2)/SiO(2) for CO Gas Sensors: Microstructure and Reactivity in the Interaction with the Gas Phase
title_sort nanocomposites sno(2)/sio(2) for co gas sensors: microstructure and reactivity in the interaction with the gas phase
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6480095/
https://www.ncbi.nlm.nih.gov/pubmed/30987046
http://dx.doi.org/10.3390/ma12071096
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