Get access

Enhancement of Sorption Processes in the Zeolite H-ZSM5 by Postsynthetic Surface Modification


  • Financial support from the DFG under projects JE260-7/1 and JE260-8/1 is acknowledged. S.J.R. acknowledges the “Studienstiftung des Deutschen Volkes” for a PhD scholarship. We are grateful to Martin Neukamm, Dr. M. Hanzslik, and Prof. Dr. S. Weinkauf for the SEM and TEM measurements. We are also grateful for fruitful discussions in the framework of the center of excellence IDECAT and the graduate school NanoCat.


original image

Catching molecules: When the surface of zeolite HZSM-5 (see picture, red) is modified by amorphous SiO2 layers (gray), increased surface roughness results. The mesopores in the rough SiO2 layer funnel benzene molecules into the micropores of the zeolite, thus increasing sorption rates for benzene at the acidic hydroxy groups by a factor of two. The size of the mesopores relative to the adsorbing molecules is critical for sorption-rate enhancement.

Get access to the full text of this article