Počet záznamů: 1
CO.sub.2./sub. diffusion in graphene oxide and reduced graphene oxide foils and its comparison with N.sub.2./sub. and Ar
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SYSNO ASEP 0558722 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název CO2 diffusion in graphene oxide and reduced graphene oxide foils and its comparison with N2 and Ar Tvůrce(i) Torrisi, L. (IT)
Silipigni, L. (IT)
Cutroneo, Mariapompea (UJF-V) ORCID, RID, SAI
Torrisi, A. (IT)Celkový počet autorů 4 Číslo článku 589 Zdroj.dok. Applied Physics A - Materials Science & Processing. - : Springer - ISSN 0947-8396
Roč. 128, č. 7 (2022)Poč.str. 12 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova graphene oxide ; reduced graphene oxide ; carbon dioxide ; diffusion coefficient ; activation energy Obor OECD Coating and films Způsob publikování Omezený přístup Institucionální podpora UJF-V - RVO:61389005 UT WOS 000812675500007 EID SCOPUS 85132107854 DOI 10.1007/s00339-022-05735-2 Anotace Measurements of the carbon dioxide (CO2) diffusion in graphene oxide (GO) and reduced graphene oxide (rGO) vs. temperature have been performed using uniform GO thin foils with15 mu m thickness. Regarding rGO, its foils have been obtained by submitting GO at a temperature of 130 degrees C in vacuum for 30 min. The CO2 diffusion has been controlled by the gas pressure gradient applied to two faces of the thin foils versus the time and the temperature. The calculated CO2 coefficient diffusions have been compared with those relative to the nitrogen (N-2) and argon (Ar) gases obtained in previous measurements. The deduced diffusion coefficients are different for the three investigated gases, but remain of the order of 10(-3) cm(2)/s. At room temperature in GO the minimum value is obtained for nitrogen, while the highest one for Ar. Indeed, at 100 degrees C in rGO the minimum value is deduced for nitrogen and the maximum one for the carbon dioxide. The different diffusion coefficients can be attributed not only to the different size, shape and atomic mass of the investigated gases, but also to the inner lattice structure of the GO and rGO foils. GO contains water and oxygen functional groups which obstacle the diffusion process. rGO is poorer of oxygen functional groups and of water, partially enhancing the diffusion, but it has a high compactness and density which may reduce the total diffusivity. The obtained results, their correlation with the inner structure of the graphene sheets and the comparison between measurements and the literature data are presented and discussed. Pracoviště Ústav jaderné fyziky Kontakt Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Rok sběru 2023 Elektronická adresa https://doi.org/10.1007/s00339-022-05735-2
Počet záznamů: 1