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

Xiaoxia Zhou; Yu Chen; Tongguang Ge; Zile Hua; Hangrong Chen; Jianlin Shi

doi:10.1016/j.scib.2017.06.009

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

Sci Bull (Beijing). 2017 Jul 30;62(14):1018-1024. doi: 10.1016/j.scib.2017.06.009. Epub 2017 Jun 23.

Authors

Xiaoxia Zhou¹, Yu Chen¹, Tongguang Ge¹, Zile Hua¹, Hangrong Chen², Jianlin Shi¹

Affiliations

¹ State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China.
² State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China. Electronic address: hrchen@mail.sic.ac.cn.

PMID: 36659493
DOI: 10.1016/j.scib.2017.06.009

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 (0.65cm³g^-1) 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.

Keywords: Beta/ZSM-5/TS; Condensation of benzaldehyde; Hierarchically porous; Single-crystalline; Sodium carbonate; Template-free.