Organic adsorbates have higher affinities to fluorographene than to graphene

Result code in 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>
Result on the web
<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>

Result language
angličtina
Original language name
Organic adsorbates have higher affinities to fluorographene than to graphene
Original language description
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.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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