Synthesis and characterization of mesoporous zeolite Beta templated by a novel organosiloxane

Abstract

In this paper, a novel organosiloxane was prepared and employed as mesoporogen to synthesis mesoporous zeolite Beta successfully. With the increase of organosiloxane to synthesis mixture, the total BET (Brunauer–Emmett–Teller) surface areas of the as-obtained samples increased initially and then decreased. When the mesoporogen/SiO2 ratio was 0.0142, the prepared zeolite sample had the largest BET surface area up to 810 m2/g. The DFT pore size distribution shows that the resulting mesoporous zeolite Beta samples have mesopore size distributions of approximately 2–6 nm. SEM images exhibit the morphology of the samples comprised ellipsoidal particles of 400–500 nm, and its surface is similar to a cracked cauliflower. From the TEM images, large numbers of worm-like mesopores and the basic crystal structure of the mesoporous zeolite Beta are clearly presented.