Structural Characterization of a Mesoporous Material

A mesoporous material was studied by small-angle X-ray scattering (SAXS). Important structure parameters of the material like the pore size, degree of polydispersity, total volume fraction and the arrangement of the pores were obtained.

SAXS and mesoporous materials

Porous materials can have an enormous internal surface. They are used as catalysts, as molecular sieves, as adsorbents and in many more applications. Their ability to selectively adsorb molecules of certain size and shape is closely related to their internal pore size and geometry.

SAXS is an ideal tool for the char-acterization of the structure and the pore size of such materials, i.e. the particle diameter D, the mean pore diameter d as well as the typical distance between the pores R can be determined.

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