Reversible change of high-temperature oxidation resistance of graphene-copper nanocomposites by interplay of catalytic effect of copper and structural disorder of few-layer graphene
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F25%3A00142584" target="_blank" >RIV/00216224:14310/25:00142584 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0925963525010167" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0925963525010167</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.diamond.2025.112959" target="_blank" >10.1016/j.diamond.2025.112959</a>
Alternative languages
Result language
angličtina
Original language name
Reversible change of high-temperature oxidation resistance of graphene-copper nanocomposites by interplay of catalytic effect of copper and structural disorder of few-layer graphene
Original language description
High-temperature stability of nanocomposite materials based on metal nanoparticles embedded in the graphene matrix play an important role in modern technology, especially in the field of energy storage and thermal management materials. Few-layer graphene (FLG) nanosheets/Cu nanoparticles (Cu-NPs) composites were prepared by decomposition of ethanol in TIAGO (Torche à Injection Axial sur Guide d'Ondes) microwave plasma torch at atmospheric pressure using erosion of copper nozzle electrode as source of Cu. Delivered microwave power and subsequent heat treatment annealing of the composite material led to the controllable change of its high-temperature oxidation resistance, determined by thermogravimetry in argon and air. As-synthesized and annealed Cu-NPs and FLG structures were analyzed by scanning and transmission electron microscopy and Raman and X-Ray photoelectron spectroscopy and Energy-dispersive X-ray analysis. The amount of copper was determined by X-ray powder diffraction using the internal standard method. Results show that the copper fraction - nanoparticle's size and their quantity, together with amounts of disorder in the FLG structure are the critical factors controlling the observed modification of high-temperature resistance. Partial removal of both Cu-NPs as well as highly disordered graphene fraction using high temperature (800–1050 °C) annealing in Ar or vacuum, led to the controlled variation of nanocomposite's thermal stability under oxidation atmosphere, with continuous change of maximum oxidation rate between 500 and 750 °C. Moreover, the purposeful admixture of disordered fraction of graphene nanosheets enabled recovery of initial state of nanocomposite properties and recovery of its high-temperature original oxidation resistance.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/LM2023039" target="_blank" >LM2023039: R&D centre for plasma and nanotechnology surface modifications</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Diamond and Related Materials
ISSN
0925-9635
e-ISSN
1879-0062
Volume of the periodical
160
Issue of the periodical within the volume
December
Country of publishing house
CH - SWITZERLAND
Number of pages
15
Pages from-to
112959
UT code for WoS article
001603890900001
EID of the result in the Scopus database
2-s2.0-105020036831