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Open AccessArticle

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

1
Department of Solid State Engineering, Faculty of Chemical Technology, University of Chemistry and Technology, Technická 5, 166 28 Prague 6, Czech Republic
2
Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology, Technická 5, 166 28 Prague 6, Czech Republic
*
Author to whom correspondence should be addressed.
Materials 2020, 13(12), 2878; https://doi.org/10.3390/ma13122878
Received: 29 May 2020 / Revised: 22 June 2020 / Accepted: 25 June 2020 / Published: 26 June 2020
(This article belongs to the Special Issue Synthesis and Properties of Nano-Based Composites)
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 Cu2O 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. View Full-Text
Keywords: copper nanoparticles oxidation; copper oxides; thermogravimetry; differential thermal analysis; differential scanning calorimetry copper nanoparticles oxidation; copper oxides; thermogravimetry; differential thermal analysis; differential scanning calorimetry
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MDPI and ACS Style

Leitner, J.; Sedmidubský, D.; Lojka, M.; Jankovský, O. The Effect of Nanosizing on the Oxidation of Partially Oxidized Copper Nanoparticles. Materials 2020, 13, 2878.

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