Study of structural irregularities of smectite clay systems by small-angle neutron scattering and adsorption |
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Authors: | A. De Stefanis Th.A. Steriotis U. Keiderling |
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Affiliation: | a Ist. Stud. Materiali Nanostrutturati, Area della Ricerca di Roma del CNR, 00016 Monterotondo Staz., Rome, Italy b National Center for Scientific Research “Demokritos”, 15310 Ag. Paraskevi Attikis, Athens, Greece c Hahn-Meitner Institut, BENSC, Glienicker Strasse 100, D-14109 Berlin, Germany |
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Abstract: | Small angle neutron scattering (SANS) and its contrast-matching variant are employed in order to determine structural properties (inter-pillar distances and mass/surface fractal dimensions of the clay layers and pillars) of a series of smectite natural clays (montmorillonite, beidellite, and bentonite) and their pillared and pillared/ion-exchanged analogues. Moreover, a comparative analysis with the adsorption data is carried out on the basis of a systematic study of the structural changes induced by a particular treatment or modification (e.g. pillaring) of the clay systems. |
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Keywords: | 68.35.Ct 68.43.&minus h 61.12.Ex |
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