Authors: Daoping He Dongliang Liu
Publish Date: 2014/10/28
Volume: 22, Issue: 1, Pages: 65-72
Abstract
A series of rationally designed carbamatelinked organosilanes with double alkyl chain lengths from C8 to C14 were synthesized as novel template agents to prepare hierarchically porous zeolites The variable chain lengths had strong affects on zeolite morphology control process in the given synthesis condition as indicated by Xray diffraction XRD scanning electron microscopy SEM and nitrogen adsorption–desorption analyses The addition of the organosilanes with C8 C10 and C14 lengths 5 mol of the total silica source into the synthesis compositions gave zeolites with isolated crystals While the organosilane with C12 length caused dramatic change in the product morphology and gave mesoporous ZSM5 crystals with a chainlike morphology XRD patterns nitrogen sorption isotherm and SEM images of the samples taken during crystallization clearly showed the change of crystallinity texture properties and forming process of this morphology
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