Characterization of porous glass by adsorption of dibromomethane in conjunction with small-angle x-ray scattering (Journal article)

Mitropoulos, A.Ch.Haynes, J.M.Richardson, R.M.Kanellopoulos, N.K.

 Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorMitropoulos, A.Ch.en
dc.contributor.authorHaynes, J.M.en
dc.contributor.authorRichardson, R.M.en
dc.contributor.authorKanellopoulos, N.K.en
dc.rightsDefault License-
dc.subjectGlass samplesen
dc.subjectMonolithic formen
dc.titleCharacterization of porous glass by adsorption of dibromomethane in conjunction with small-angle x-ray scatteringen
heal.generalDescriptionVolume 52, Issue 14, pp. 10035-10042en
heal.generalDescriptionSchool of Chemistry, University of Bristol, Cantock's Close, BS8 1TS Bristol, United Kingdom;en
heal.generalDescriptionNational Centre for Scientific Research Demokritos, Institute of Physical Chemistry, 153 10 Aghia Paraskevi Attikis, Greeceen
heal.recordProviderΔεν υπάρχει πληροφορίαel
heal.bibliographicCitationΔεν υπάρχει πληροφορίαel
heal.abstractTwo porous glass samples of the Vycor type, one in a monolithic form and the other as a fine powder, were examined by the method of small-angle x-ray scattering (SAXS). Adsorption isotherms of dibromomethane (CH2Br2) were measured on the same samples, and analyzed according to the Kelvin equation. The SAXS measurements were repeated on samples that had been brought to equilibrium with known relative pressures (p/p0) of CH2Br2, which has a similar electron density as Vycor. Analysis of the data, in terms of fractal geometry, was also accomplished. The fractal dimension for the dry samples was estimated to be 2.5±0.1. Furthermore, as the adsorbate loading was increased defractalization was observed. Subsequently, the fractality in Vycor was estimated to have an upper cutoff limit equal to 15. A correlation between the two methods was demonstrated, by reconstructing the adsorption isotherm from the SAXS data, in two ways: first, by plotting the scattering intensities against p/p0 and second by plotting the Porod slopes against p/p0. © 1995 The American Physical Society.en
heal.publisherΔεν υπάρχει πληροφορίαel
heal.journalNamePhysical Review Ben
heal.type.enJournal articleen
heal.type.elΆρθρο περιοδικούel
Appears in Collections:ΑΡΘΡΑ-ΜΕΛΕΤΕΣ

Files in This Item:
There are no files associated with this item.

This item is licensed under a Creative Commons License Creative Commons