Ceramics-Silikáty 46, (1) 33 - 35 (2002) |
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CHARACTERIZATION OF SILICA SORBENTS BY SANS
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Szőcs Ferenc 1, Plaček Jan 1, Novák Ivan 1,
Borbély Sándor 2,
Gilles Ralf 3
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1 Polymer Institute SAS,
Dúbravská cesta 9, 842 36 Bratislava, Slovak Republic
2 Research Institute for Solid State Physics, KFKI,
Konkoly Thege Str. 29-33, 1525 Budapest, Hungary
3 Hahn-Meitner-Institute,
Glieniker Str. 100, 14109 Berlin, Germany
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Keywords: Silica sorbents, Pore size, Small-angle neutron scattering
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Silica sorbents were prepared and investigated by small-angle neutron scattering (SANS). The surface area, pore volume,
mean pore diameter and thickness of the pore walls determined by traditional adsorption technique are compared with the
mean radius or correlation length determined by SANS method. The pore size determined by adsorption methods is far from
the values of the scattering object size obtained by SANS method. It is supposed that the scattering objects in SANS are not
pores but the walls of the pores. |
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