Hydration behavior and dynamics of water molecules in graphite oxide

A. Lerf, A. Buchsteiner, J. Pieper, S. Schöttl, I. Dékány, T. Szabó, H. P. Boehm

Research output: Contribution to journalArticle

250 Citations (Scopus)

Abstract

In contrast to graphite intercalation compounds, graphite oxide (GO) is hydrophilic. However, the information about the mobility of the water molecules is still sparse. We show in this report that the degree of hydration and the kinetics of water uptake depend crucially on the preparation and aging conditions. The best sample we have ever got shows layer distances of 8, 9 and 11.5 Å at relative humidities of 45, 75 and 100%, respectively. With time-of-flight (TOF) neutron scattering (V3/NEAT spectrometer) diffusion processes for rotation and translation have been investigated in the temperature range 220-320 K with an energy resolution of 93 μeV. Quasi-elastic scattering was observed for all temperatures. Three types of motion can be sorted out. The first one is a translational motion of water molecules in pores between the GO particles for samples equilibrated at 100% relative humidity. Samples equilibrated at 45 and 75% relative humidity do not show this type of water. They exhibit two types of localized motions with different activation energies. We try to assign one type of these motions to confined water molecules encapsulated in the interlayer space between the functional groups attached to the carbon grid.

Original languageEnglish
Pages (from-to)1106-1110
Number of pages5
JournalJournal of Physics and Chemistry of Solids
Volume67
Issue number5-6
DOIs
Publication statusPublished - May 2006

Fingerprint

Graphite
Hydration
Oxides
hydration
graphite
Molecules
oxides
Water
humidity
Atmospheric humidity
water
molecules
Intercalation compounds
translational motion
Elastic scattering
Neutron scattering
intercalation
Functional groups
Spectrometers
interlayers

Keywords

  • A. Non-crystalline materials
  • C. Neutron scattering
  • C. X-ray diffraction
  • D. Lattice dynamics

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Hydration behavior and dynamics of water molecules in graphite oxide. / Lerf, A.; Buchsteiner, A.; Pieper, J.; Schöttl, S.; Dékány, I.; Szabó, T.; Boehm, H. P.

In: Journal of Physics and Chemistry of Solids, Vol. 67, No. 5-6, 05.2006, p. 1106-1110.

Research output: Contribution to journalArticle

Lerf, A. ; Buchsteiner, A. ; Pieper, J. ; Schöttl, S. ; Dékány, I. ; Szabó, T. ; Boehm, H. P. / Hydration behavior and dynamics of water molecules in graphite oxide. In: Journal of Physics and Chemistry of Solids. 2006 ; Vol. 67, No. 5-6. pp. 1106-1110.
@article{3ff6e4d9e016444e843d6588ae208293,
title = "Hydration behavior and dynamics of water molecules in graphite oxide",
abstract = "In contrast to graphite intercalation compounds, graphite oxide (GO) is hydrophilic. However, the information about the mobility of the water molecules is still sparse. We show in this report that the degree of hydration and the kinetics of water uptake depend crucially on the preparation and aging conditions. The best sample we have ever got shows layer distances of 8, 9 and 11.5 {\AA} at relative humidities of 45, 75 and 100{\%}, respectively. With time-of-flight (TOF) neutron scattering (V3/NEAT spectrometer) diffusion processes for rotation and translation have been investigated in the temperature range 220-320 K with an energy resolution of 93 μeV. Quasi-elastic scattering was observed for all temperatures. Three types of motion can be sorted out. The first one is a translational motion of water molecules in pores between the GO particles for samples equilibrated at 100{\%} relative humidity. Samples equilibrated at 45 and 75{\%} relative humidity do not show this type of water. They exhibit two types of localized motions with different activation energies. We try to assign one type of these motions to confined water molecules encapsulated in the interlayer space between the functional groups attached to the carbon grid.",
keywords = "A. Non-crystalline materials, C. Neutron scattering, C. X-ray diffraction, D. Lattice dynamics",
author = "A. Lerf and A. Buchsteiner and J. Pieper and S. Sch{\"o}ttl and I. D{\'e}k{\'a}ny and T. Szab{\'o} and Boehm, {H. P.}",
year = "2006",
month = "5",
doi = "10.1016/j.jpcs.2006.01.031",
language = "English",
volume = "67",
pages = "1106--1110",
journal = "Journal of Physics and Chemistry of Solids",
issn = "0022-3697",
publisher = "Elsevier Limited",
number = "5-6",

}

TY - JOUR

T1 - Hydration behavior and dynamics of water molecules in graphite oxide

AU - Lerf, A.

AU - Buchsteiner, A.

AU - Pieper, J.

AU - Schöttl, S.

AU - Dékány, I.

AU - Szabó, T.

AU - Boehm, H. P.

PY - 2006/5

Y1 - 2006/5

N2 - In contrast to graphite intercalation compounds, graphite oxide (GO) is hydrophilic. However, the information about the mobility of the water molecules is still sparse. We show in this report that the degree of hydration and the kinetics of water uptake depend crucially on the preparation and aging conditions. The best sample we have ever got shows layer distances of 8, 9 and 11.5 Å at relative humidities of 45, 75 and 100%, respectively. With time-of-flight (TOF) neutron scattering (V3/NEAT spectrometer) diffusion processes for rotation and translation have been investigated in the temperature range 220-320 K with an energy resolution of 93 μeV. Quasi-elastic scattering was observed for all temperatures. Three types of motion can be sorted out. The first one is a translational motion of water molecules in pores between the GO particles for samples equilibrated at 100% relative humidity. Samples equilibrated at 45 and 75% relative humidity do not show this type of water. They exhibit two types of localized motions with different activation energies. We try to assign one type of these motions to confined water molecules encapsulated in the interlayer space between the functional groups attached to the carbon grid.

AB - In contrast to graphite intercalation compounds, graphite oxide (GO) is hydrophilic. However, the information about the mobility of the water molecules is still sparse. We show in this report that the degree of hydration and the kinetics of water uptake depend crucially on the preparation and aging conditions. The best sample we have ever got shows layer distances of 8, 9 and 11.5 Å at relative humidities of 45, 75 and 100%, respectively. With time-of-flight (TOF) neutron scattering (V3/NEAT spectrometer) diffusion processes for rotation and translation have been investigated in the temperature range 220-320 K with an energy resolution of 93 μeV. Quasi-elastic scattering was observed for all temperatures. Three types of motion can be sorted out. The first one is a translational motion of water molecules in pores between the GO particles for samples equilibrated at 100% relative humidity. Samples equilibrated at 45 and 75% relative humidity do not show this type of water. They exhibit two types of localized motions with different activation energies. We try to assign one type of these motions to confined water molecules encapsulated in the interlayer space between the functional groups attached to the carbon grid.

KW - A. Non-crystalline materials

KW - C. Neutron scattering

KW - C. X-ray diffraction

KW - D. Lattice dynamics

UR - http://www.scopus.com/inward/record.url?scp=33744934800&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33744934800&partnerID=8YFLogxK

U2 - 10.1016/j.jpcs.2006.01.031

DO - 10.1016/j.jpcs.2006.01.031

M3 - Article

VL - 67

SP - 1106

EP - 1110

JO - Journal of Physics and Chemistry of Solids

JF - Journal of Physics and Chemistry of Solids

SN - 0022-3697

IS - 5-6

ER -