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The Effect of Nanosizing on the Oxidation of Partially Oxidized Copper Nanoparticles

Copper nanoparticles are of great interest in various applications, such as catalysis, cooling fluids, conductive inks or for their antibacterial activity. In this paper, the thermal behavior of copper nanoparticles was studied using thermogravimetry, differential thermal analysis and differential s...

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Detalles Bibliográficos
Autores principales: Leitner, Jindřich, Sedmidubský, David, Lojka, Michal, Jankovský, Ondřej
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7345119/
https://www.ncbi.nlm.nih.gov/pubmed/32604933
http://dx.doi.org/10.3390/ma13122878
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author Leitner, Jindřich
Sedmidubský, David
Lojka, Michal
Jankovský, Ondřej
author_facet Leitner, Jindřich
Sedmidubský, David
Lojka, Michal
Jankovský, Ondřej
author_sort Leitner, Jindřich
collection PubMed
description Copper nanoparticles are of great interest in various applications, such as catalysis, cooling fluids, conductive inks or for their antibacterial activity. In this paper, the thermal behavior of copper nanoparticles was studied using thermogravimetry, differential thermal analysis and differential scanning calorimetry. Original Cu samples as well as the products of oxidation were analysed by X-ray diffraction, scanning/transmission electron microscopy and energy dispersive spectroscopy. A step-by-step oxidation mechanism during the oxidation of Cu nano-powders was observed. The Cu-nano oxidation starts slightly above 150 °C when bulk copper does not yet react. The dominant oxidation product in the first step is Cu(2)O while CuO was identified as the final state of oxidation. Our results confirm an easier oxidation process of Cu-nano than Cu-micro particles, which must be attributed to kinetic not thermodynamic aspects of oxidation reactions.
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spelling pubmed-73451192020-07-09 The Effect of Nanosizing on the Oxidation of Partially Oxidized Copper Nanoparticles Leitner, Jindřich Sedmidubský, David Lojka, Michal Jankovský, Ondřej Materials (Basel) Article Copper nanoparticles are of great interest in various applications, such as catalysis, cooling fluids, conductive inks or for their antibacterial activity. In this paper, the thermal behavior of copper nanoparticles was studied using thermogravimetry, differential thermal analysis and differential scanning calorimetry. Original Cu samples as well as the products of oxidation were analysed by X-ray diffraction, scanning/transmission electron microscopy and energy dispersive spectroscopy. A step-by-step oxidation mechanism during the oxidation of Cu nano-powders was observed. The Cu-nano oxidation starts slightly above 150 °C when bulk copper does not yet react. The dominant oxidation product in the first step is Cu(2)O while CuO was identified as the final state of oxidation. Our results confirm an easier oxidation process of Cu-nano than Cu-micro particles, which must be attributed to kinetic not thermodynamic aspects of oxidation reactions. MDPI 2020-06-26 /pmc/articles/PMC7345119/ /pubmed/32604933 http://dx.doi.org/10.3390/ma13122878 Text en © 2020 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
Leitner, Jindřich
Sedmidubský, David
Lojka, Michal
Jankovský, Ondřej
The Effect of Nanosizing on the Oxidation of Partially Oxidized Copper Nanoparticles
title The Effect of Nanosizing on the Oxidation of Partially Oxidized Copper Nanoparticles
title_full The Effect of Nanosizing on the Oxidation of Partially Oxidized Copper Nanoparticles
title_fullStr The Effect of Nanosizing on the Oxidation of Partially Oxidized Copper Nanoparticles
title_full_unstemmed The Effect of Nanosizing on the Oxidation of Partially Oxidized Copper Nanoparticles
title_short The Effect of Nanosizing on the Oxidation of Partially Oxidized Copper Nanoparticles
title_sort effect of nanosizing on the oxidation of partially oxidized copper nanoparticles
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7345119/
https://www.ncbi.nlm.nih.gov/pubmed/32604933
http://dx.doi.org/10.3390/ma13122878
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