Journal of the American Chemical Society, Vol.121, No.1, 139-146, 1999
Preparation of oriented zeolite UTD-1 membranes via pulsed laser ablation
Thin films of the high silica zeolite UTD-1 have been prepared by using pulsed laser ablation onto polished silicon and for the first time on porous stainless steel disks. A post hydrothermal treatment of the laser deposited films in a UTD-1 synthesis gel results in oriented crystal growth. Densely packed planklike crystals of UTD-1 grow from the laser deposited film resulting in the ultra-large pores of UTD-1 oriented perpendicular to the support. The oriented UTD-1 membrane grown on porous stainless steel was evaluated for the room temperature separation of a n-heptane/toluene mixture, and selective permeation of the paraffin was observed.
Keywords:ALUMINA COMPOSITE MEMBRANES;PHASE TRANSPORT METHOD;MOLECULAR-SIEVES;CHEMICAL SENSORS;THIN-FILMS;SEPARATION;GROWTH;ZSM-5;PERMEATION;CRYSTALS