ArticleMaterials (Basel, Switzerland)2019
Nanocomposites SnO₂/SiO₂ for CO Gas Sensors: Microstructure and Reactivity in the Interaction with the Gas Phase.
Article in Materials (Basel, Switzerland), 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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9 citing papers in PubMed, 23 citations in OpenAlex.
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- Effects of Plasma Treatment on the Surface and Photocatalytic Properties of Nanostructured SnOMaterials (Basel, Switzerland) · 2023Article
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- KIT-5-Assisted Synthesis of Mesoporous SnOMolecules (Basel, Switzerland) · 2023Article
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8 authors at 3 institutions in 1 country.
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Abstract
Nanocomposites SnO₂/SiO₂ 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 SnO₂ nanoparticles during high-temperature annealing, which makes it possible to obtain sensor materials operating stably at different temperature conditions. The sensor properties of SnO₂ and SnO₂/SiO₂ 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 SnO₂/SiO₂ nanocomposites are more sensitive to CO in humid air as compared to pure SnO₂, 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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