Surface chemistry and contrast-modified SAXS in polymer-based activated carbons

K. László, Erik Geissler

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The adsorption of non-polar and polar molecules, n-hexane and water, on activated carbons, functionalized by oxidation with concentrated nitric acid, is investigated by small angle X-ray scattering. A relative mass density function p(q) is introduced in order to trace the filling characteristics of these probe molecules in the pore structure. Inspection of p(q) shows that while the pores affected by the applied relative pressure are completely filled by n-hexane, pore filling by water is only partial, even in the most oxidized carbon. The differences between the solid-liquid contact areas of these two molecules adsorbed from the vapour phase on the various carbons illustrate the influence of surface chemistry and molecular polarity on the contrast-modified SAXS response.

Original languageEnglish
Pages (from-to)2437-2444
Number of pages8
JournalCarbon
Volume44
Issue number12
DOIs
Publication statusPublished - Oct 2006

Fingerprint

Surface chemistry
Activated carbon
Polymers
Hexane
Molecules
Molecular polarity
Carbon
Nitric Acid
Water
Nitric acid
Pore structure
X ray scattering
Contacts (fluid mechanics)
Probability density function
Inspection
Vapors
Adsorption
Oxidation
Liquids
n-hexane

Keywords

  • Activated carbon
  • Functional groups
  • Interfacial properties
  • Small angle X-ray scattering
  • Surface treatment

ASJC Scopus subject areas

  • Materials Chemistry

Cite this

Surface chemistry and contrast-modified SAXS in polymer-based activated carbons. / László, K.; Geissler, Erik.

In: Carbon, Vol. 44, No. 12, 10.2006, p. 2437-2444.

Research output: Contribution to journalArticle

László, K. ; Geissler, Erik. / Surface chemistry and contrast-modified SAXS in polymer-based activated carbons. In: Carbon. 2006 ; Vol. 44, No. 12. pp. 2437-2444.
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