Incompatible liquids in confined conditions

K. László, Bruno Demé, Orsolya Czakkel, Erik Geissler

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

In applications involving organic vapor, the performance of high surface area carbons is often challenged by water vapor in the atmosphere. Small angle neutron scattering (SANS), through its ability to distinguish between different components by means of contrast variation, is ideally suited to investigating the behavior of adsorbed layers in simultaneous contact with a mixed vapor phase. Even at high relative humidity (RH), water alone forms a discontinuous film composed of clusters on the surface of the oxidized microporous carbon used for these studies. When toluene is also present, all the available carbon surface is wetted. Toluene and water adsorb as a single phase already at RH 11.5%, and the concentration of water present in the adsorbed phase is as high as 2.9 wt %, far above its solubility in bulk toluene (0.033 wt % at 25°C). At RH 87% the concentration of water in the adsorbed phase is four times higher, approximately 12 wt %. The recently proposed mechanism of anchoring of the water by the aromatic molecules may provide an explanation for this phenomenon.

Original languageEnglish
Pages (from-to)23723-23727
Number of pages5
JournalJournal of Physical Chemistry C
Volume118
Issue number41
DOIs
Publication statusPublished - Oct 16 2014

Fingerprint

Toluene
Water
Liquids
toluene
humidity
liquids
Atmospheric humidity
Carbon
water
carbon
Vapors
Steam
Neutron scattering
Contacts (fluid mechanics)
Water vapor
water vapor
neutron scattering
solubility
Solubility
vapors

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Incompatible liquids in confined conditions. / László, K.; Demé, Bruno; Czakkel, Orsolya; Geissler, Erik.

In: Journal of Physical Chemistry C, Vol. 118, No. 41, 16.10.2014, p. 23723-23727.

Research output: Contribution to journalArticle

László, K, Demé, B, Czakkel, O & Geissler, E 2014, 'Incompatible liquids in confined conditions', Journal of Physical Chemistry C, vol. 118, no. 41, pp. 23723-23727. https://doi.org/10.1021/jp506100e
László, K. ; Demé, Bruno ; Czakkel, Orsolya ; Geissler, Erik. / Incompatible liquids in confined conditions. In: Journal of Physical Chemistry C. 2014 ; Vol. 118, No. 41. pp. 23723-23727.
@article{598cfad02f3942769ca5171812cf3785,
title = "Incompatible liquids in confined conditions",
abstract = "In applications involving organic vapor, the performance of high surface area carbons is often challenged by water vapor in the atmosphere. Small angle neutron scattering (SANS), through its ability to distinguish between different components by means of contrast variation, is ideally suited to investigating the behavior of adsorbed layers in simultaneous contact with a mixed vapor phase. Even at high relative humidity (RH), water alone forms a discontinuous film composed of clusters on the surface of the oxidized microporous carbon used for these studies. When toluene is also present, all the available carbon surface is wetted. Toluene and water adsorb as a single phase already at RH 11.5{\%}, and the concentration of water present in the adsorbed phase is as high as 2.9 wt {\%}, far above its solubility in bulk toluene (0.033 wt {\%} at 25°C). At RH 87{\%} the concentration of water in the adsorbed phase is four times higher, approximately 12 wt {\%}. The recently proposed mechanism of anchoring of the water by the aromatic molecules may provide an explanation for this phenomenon.",
author = "K. L{\'a}szl{\'o} and Bruno Dem{\'e} and Orsolya Czakkel and Erik Geissler",
year = "2014",
month = "10",
day = "16",
doi = "10.1021/jp506100e",
language = "English",
volume = "118",
pages = "23723--23727",
journal = "Journal of Physical Chemistry C",
issn = "1932-7447",
publisher = "American Chemical Society",
number = "41",

}

TY - JOUR

T1 - Incompatible liquids in confined conditions

AU - László, K.

AU - Demé, Bruno

AU - Czakkel, Orsolya

AU - Geissler, Erik

PY - 2014/10/16

Y1 - 2014/10/16

N2 - In applications involving organic vapor, the performance of high surface area carbons is often challenged by water vapor in the atmosphere. Small angle neutron scattering (SANS), through its ability to distinguish between different components by means of contrast variation, is ideally suited to investigating the behavior of adsorbed layers in simultaneous contact with a mixed vapor phase. Even at high relative humidity (RH), water alone forms a discontinuous film composed of clusters on the surface of the oxidized microporous carbon used for these studies. When toluene is also present, all the available carbon surface is wetted. Toluene and water adsorb as a single phase already at RH 11.5%, and the concentration of water present in the adsorbed phase is as high as 2.9 wt %, far above its solubility in bulk toluene (0.033 wt % at 25°C). At RH 87% the concentration of water in the adsorbed phase is four times higher, approximately 12 wt %. The recently proposed mechanism of anchoring of the water by the aromatic molecules may provide an explanation for this phenomenon.

AB - In applications involving organic vapor, the performance of high surface area carbons is often challenged by water vapor in the atmosphere. Small angle neutron scattering (SANS), through its ability to distinguish between different components by means of contrast variation, is ideally suited to investigating the behavior of adsorbed layers in simultaneous contact with a mixed vapor phase. Even at high relative humidity (RH), water alone forms a discontinuous film composed of clusters on the surface of the oxidized microporous carbon used for these studies. When toluene is also present, all the available carbon surface is wetted. Toluene and water adsorb as a single phase already at RH 11.5%, and the concentration of water present in the adsorbed phase is as high as 2.9 wt %, far above its solubility in bulk toluene (0.033 wt % at 25°C). At RH 87% the concentration of water in the adsorbed phase is four times higher, approximately 12 wt %. The recently proposed mechanism of anchoring of the water by the aromatic molecules may provide an explanation for this phenomenon.

UR - http://www.scopus.com/inward/record.url?scp=84908078068&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84908078068&partnerID=8YFLogxK

U2 - 10.1021/jp506100e

DO - 10.1021/jp506100e

M3 - Article

AN - SCOPUS:84908078068

VL - 118

SP - 23723

EP - 23727

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 41

ER -