期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 314, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.micromeso.2020.110865
关键词
Hollow zeolite; SSZ-13; NH3-SCR; Al-zoned; Desiliconization; One-pot
类别
资金
- National Natural Science Foundation of China [21676288]
- Dalian National Laboratory for Clean Energy (DNL) Cooperation Fund, CAS [DNL 180406]
- QIBEBT [QIBEBT ZZBS 201805]
Hollow zeolite SSZ-13 single crystals were successfully synthesized in this study without using additional templates, by adjusting the spatial chemistry distribution of elements and forming cavities through selective desiliconization. Furthermore, doping with copper resulted in enhanced catalytic activity of hollow Cu-SSZ-13 zeolite in the selective catalytic reduction (SCR) of NOx with NH3 compared to traditional solid Cu-SSZ-13.
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.
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