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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/LM2023039" target="_blank" >LM2023039: Centrum výzkumu a vývoje plazmatu a nanotechnologických povrchových úprav</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Diamond and Related Materials

ISSN

0925-9635

e-ISSN

1879-0062

Svazek periodika

160

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

15

Strana od-do

112959

Kód UT WoS článku

001603890900001

EID výsledku v databázi Scopus

2-s2.0-105020036831