Synthesis and Characterization of Zeolitic Imidazolate Framework-8@Sodalite Composite Particles

Abstract:

We demonstrate the preparation of hierarchical porous structure composite particles containing sodalite cores,and outer zeolitic imidazolate framework-8 (ZIF-8) shells. The synthesis involved first synthesis of sodalite zeolites by hydrothermal reaction from alkali-activated kaolin with polyacrylamide acting as structure-directing agent, and followed by the directly in stu growth ZIF-8 nanoparticles shells over the sodalite microparticles. The resulting core shell structure ZIF-8@Sodalite composites were characterized by powder X-ray diffraction (PXRD) and scanning electron microscope (SEM) Nitrogen adsorption, Fourier Transform infrared spectroscopy (FTIR), hermogravimetry analysis (TGA) and differential thermal analysis (DTA). SEM picture showed ZIF-8 particles adhesive on the surface of Sodalite. The composites have a nitrogen sorption capability as high as around 120 cm³/g and a BET surface area of over 328.86 m²/g, which are much higher than that of pure sodalites. The weight percentage of ZIF-8 loading on sodalite external surface can be calculated to be approximately 12% by mass loss on the TG curves. It is believed that the designed ZIF-8@Sodalite particles could broaden the application areas of zeolites in heterogeneous catalysis.

• Periodical: Materials Science Forum (Volume 852)
• Pages: 1250-1255
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.852.1250
• Online since: April 2016
• Authors: Xue Zeng, Rong Yi Chen, Xiao Bing Yang, Jin Tang Li, Xue Tao Luo
• Keywords: Composite Particles, Crystalline Phases, Stability, ZIF-8@SOD

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