期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 142, 期 8, 页码 3931-3938出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.9b12709
关键词
-
资金
- Japan Society for the Promotion of Science (JSPS) [18K14053]
- Grants-in-Aid for Scientific Research [18K14053] Funding Source: KAKEN
Improving the stability of porous materials for practical applications is highly challenging. Aluminosilicate zeolites are utilized for adsorptive and catalytic applications, wherein they are sometimes exposed to high-temperature steaming conditions (similar to 1000 degrees C). As the degradation of high -silica zeolites originates from the defect sites in their frameworks, feasible defect-healing methods are highly demanded. Herein, we propose a method for healing defects to create extremely stable high-silica zeolites. High -silica (SiO2/Al2O3 > 240) zeolites with *BEA-, MFI-, and MOR-type topologies could be stabilized by significantly reducing the number of defect sites via a liquid-mediated treatment without using additional silylating agents. Upon exposure to extremely high temperature (900-1150 degrees C) steam, the stabilized zeolites retain their crystallinity and micropore volume, whereas the parent commercial zeolites degrade completely. The proposed self-defect-healing method provides new insights into the migration of species through porous bodies and significantly advances the practical applicability of zeolites in severe environments.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据