Abstract
Although adsorption forces are usually short range in character, multilayer adsorption also concerns the energetic heterogeneity of the adsorbing surface. In this paper we assume that each energetically homogeneous patch forming the heterogeneous surface follows the Brunauer, Emmett, and Teller (BET) adsorption isotherm, while in the submonolayer range the whole surface follows the Dubinin and Radushkevich (DR) isotherm. By so assuming we are able to obtain the multilayer adsorption isotherm for the whole heterogeneous surface, and to compare BET and DR surface areas.
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Cerofolini, G.F. Multilayer adsorption on heterogeneous surfaces. J Low Temp Phys 6, 473–486 (1972). https://doi.org/10.1007/BF00644080
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DOI: https://doi.org/10.1007/BF00644080