Organic adsorbates have higher affinities to fluorographene than to graphene
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F16%3A33161599" target="_blank" >RIV/61989592:15310/16:33161599 - isvavai.cz</a>
Výsledek na webu
<a href="http://www.sciencedirect.com/science/article/pii/S2352940716301275" target="_blank" >http://www.sciencedirect.com/science/article/pii/S2352940716301275</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.apmt.2016.09.016" target="_blank" >10.1016/j.apmt.2016.09.016</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Organic adsorbates have higher affinities to fluorographene than to graphene
Popis výsledku v původním jazyce
The large surfaces of two-dimensional carbon-based materials, such as graphene and fluorographene, are exposed to analytes, impurities and other guest molecules, so an understanding of the strength and nature of the molecule-surface interaction is essential for their practical applications. Using inverse gas chromatography, we determined the isosteric adsorption enthalpies and entropies of six volatile organic molecules (benzene, toluene, cyclohexane, n-hexane, 1,4-dioxane, and nitromethane) to graphene and graphite fluoride powders. The adsorption entropies of the molecules ranged from MINUS SIGN 17 to MINUS SIGN 34 cal/mol K and the maximum adsorption-induced entropy loss occurred for nitromethane at the high-energy sites. The enthalpies of bulkier adsorbates were almost coverage-independent on both surfaces and ranged from MINUS SIGN 11 to MINUS SIGN 14 kcal/mol. Despite the fact that fluorographene has lower surface energy than graphene and graphene represents an ideal surface for the π-π stacking, the adsorbates had lower adsorption enthalpies to fluorographene than to graphene by TILDE OPERATOR+D919%. These findings imply that bulkier airbone organic contaminants readily adsorb to the investigated surfaces and can modify the measured surface properties.
Název v anglickém jazyce
Organic adsorbates have higher affinities to fluorographene than to graphene
Popis výsledku anglicky
The large surfaces of two-dimensional carbon-based materials, such as graphene and fluorographene, are exposed to analytes, impurities and other guest molecules, so an understanding of the strength and nature of the molecule-surface interaction is essential for their practical applications. Using inverse gas chromatography, we determined the isosteric adsorption enthalpies and entropies of six volatile organic molecules (benzene, toluene, cyclohexane, n-hexane, 1,4-dioxane, and nitromethane) to graphene and graphite fluoride powders. The adsorption entropies of the molecules ranged from MINUS SIGN 17 to MINUS SIGN 34 cal/mol K and the maximum adsorption-induced entropy loss occurred for nitromethane at the high-energy sites. The enthalpies of bulkier adsorbates were almost coverage-independent on both surfaces and ranged from MINUS SIGN 11 to MINUS SIGN 14 kcal/mol. Despite the fact that fluorographene has lower surface energy than graphene and graphene represents an ideal surface for the π-π stacking, the adsorbates had lower adsorption enthalpies to fluorographene than to graphene by TILDE OPERATOR+D919%. These findings imply that bulkier airbone organic contaminants readily adsorb to the investigated surfaces and can modify the measured surface properties.
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
CF - Fyzikální chemie a teoretická chemie
OECD FORD obor
—
Návaznosti výsledku
Projekt
Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2016
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Applied Materials Today
ISSN
2352-9407
e-ISSN
—
Svazek periodika
5
Číslo periodika v rámci svazku
DEC
Stát vydavatele periodika
NL - Nizozemsko
Počet stran výsledku
8
Strana od-do
"142-149"
Kód UT WoS článku
000392950300017
EID výsledku v databázi Scopus
2-s2.0-84991833373