One-pot synthesis of hollow single crystal SSZ-13 zeolite by creating aluminum gradients with excellent activity for NH3-SCR

• Published in: Microporous and mesoporous materials 2021-02, Vol.314, p.110865, Article 110865
• Main Authors: Deng, Shujun, Wang, Zhiheng, Deng, Di, Chen, Zhipeng, He, Dandan, He, Hong, Ji, Yi, Hou, Guangjin, Sun, Wenshou, Liu, Licheng
• Format: Article
• Language: English
• Subjects: Al-zoned; Desiliconization; Hollow zeolite; NH3-SCR; One-pot; SSZ-13
• ISSN: 1387-1811; 1873-3093
• DOI: 10.1016/j.micromeso.2020.110865

Hollow zeolite single crystals have received extensive attention due to their unique cavities and outstanding catalytic performance. Although many kinds of zeolites have been synthesized with hollow structures, the related synthesis of hollow SSZ-13 zeolites has not been reported yet. In this work, we first synthesized hollow zeolite SSZ-13 single crystals by a simple and economical strategy without additional templates, which involves adjusting the spatial chemistry distribution of elements throughout the crystals to create Al-zoned and forming cavity by selective desiliconization. Furthermore, we doped the synthesized hollow zeolite SSZ-13 with copper, and the hollow Cu-SSZ-13 zeolite exhibits an enhanced catalytic activity of selective catalytic reduction (SCR) of NOx with NH3 compared with the traditional solid Cu-SSZ-13. [Display omitted] •Hollow SSZ-13 zeolites are synthesized by one-pot method.•Synthetic process involves creating Al-zoned and selective desiliconization.•The Al-zoned is created by adjusting the spatial distribution of Al elements in the crystal.•NH3-SCR activity of hollow Cu-SSZ-13 is better than conventional solid Cu-SSZ-13.