Synthesis and modification of zeolite beta for studying aggregated species

In this study, zeolite beta with three dimensional structure was synthesized using hydrothermalmethod by tetraethyl ammonium hydroxide as template[۱]. The mesoporous form of the zeolitewas obtained by post-synthesis method by adding a surfactant structure-directing agent into asuspention containing the previousely synthesized zeolite. Functionalizing process was done with۳-aminopropyl trimethoxysilane (APTMS) to react effectively with the silicon groups of thesurface of zeolite beta in order to provide different space and environment for the loaded species[۲]. Methylene blue (MB) was loaded into both in the original microporous and mesoporous zeolite[۳]. The effect of functionalization and in the original and mesoporous zeolite beta in the finalproduct were investigated in terms of the loaded amount and some structural features such asmonomeric and dimeric forms of the dye (i.e. MB). The prepared materials were characterized byX-ray diffraction, scanning electron microscopy, FT-IR, BET, diffuse reflectance spectroscopyand field effect scanning electron microscopy. There are some differences in relative amount ofthe different monomeric or protonated forms of the dye upon the structure. we found that there isa special space in zeolite beta that convert 𝑀𝐵+ to 𝑀𝐵۲+ which is absent in the mesoporous zeolitebeta. The details will be demonstrated in the poster provided.

کلیدواژه ها:

Zeolite Beta ، Functionalizing ، dyes ، Loading ، Mesoporous formation