Journal
ULTRASONICS SONOCHEMISTRY
Volume 42, Issue -, Pages 303-309Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultsonch.2017.11.034
Keywords
Na-Y faujasite; Zeolite nanocrystalline; Green synthesis; Free organic template; Ultrasound pretreatment
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Funding
- Agencia Nacional de Promocion Cientifica y Tecnologica (National Agency of Scientific and Technological Promotion, Argentina)
- Consejo Nacional de Investigaciones Cientificas y Tecnicas (National Council for Scientific and Technological Research, CONICET - Argentina)
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In this work, the synthesis of 28 and 38 nm Na-Y zeolite nanocrystals is reported. The process was performed via green synthesis without any organic structure directing agents (SDAs), at low temperature and applying ultrasound-assisted aging. The zeolite nanoparticles obtained were characterized by X ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and N-2 adsorption - desorption isotherm at 77 K. A simple, fast, efficient and environmentally friendly procedure to synthetize nanocrystalline FAU zeolite is described in the present study. The sonochemical pretreatment was found to directly affect the Na-Y zeolite properties. The final product obtained via ultrasound pretreatment shows high phase purity and crystallinity degree with crystal size smaller than 38 nm and elevated surface area (S-BET 950 m(2) g(-1) al). The hierarchical micro- and mesoporous FAU zeolites exhibit a pore volume of similar to 0.4 cm(3) g(-1).
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