Sodium carbonate-assisted synthesis of hierarchically porous single-crystalline nanosized zeolites.

Sci Bull (Beijing)

State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.

Published: July 2017

AI Article Synopsis

  • The study presents a new method for creating hierarchically porous nanosized zeolites without using templates, which makes the process simpler and more efficient.
  • The synthesized zeolite beta has impressive characteristics, such as uniform crystal size, high pore volume, and a mix of small and large pore sizes, which improve its catalytic abilities.
  • This one-pot synthesis method is adaptable and has also been successfully applied to produce other types of zeolites, like ZSM-5 and TS.

Article Abstract

Hierarchically porous single-crystalline nanosized zeolites as heterogeneous catalysts show great potential in fine chemistry because they offer more rich hierarchically porous channels for the mass transfer and molecular diffusion. However, the synthesis of hierarchically porous nanosized zeolites generally requires the assistance of templates acting as the mesoporogens, which limits its popularity. Herein, we report a one-pot and template-free synthesis of hierarchically porous single-crystalline nanosized zeolite beta only by introducing sodium carbonate in precursor solution. The resulted sample features the extraordinary properties, including the uniform nanocrystal (200-300nm), high pore volume (0.65cmg) and the hierarchical pore-size distribution (e.g., 2-8 and 90-150nm). After slicing processing, it is interestingly found that a large number of interconnected mesopores penetrate throughout whole material, which enables the hierarchically porous nanosized zeolite beta remarkably superior catalytic activity than the conventional zeolite beta in condensation of benzaldehyde with ethanol at room temperature. More importantly, this one-pot sodium carbonate-assisted synthetic strategy is highly versatile, which has also been successfully developed to synthesize hierarchically porous nanosized single-crystalline zeolites ZSM-5 and TS.

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Source
http://dx.doi.org/10.1016/j.scib.2017.06.009DOI Listing

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