期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 39, 页码 35820-35826出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b13965
关键词
metal-organic frameworks; hollow structure; gas separation; adsorption kinetics; diffusion
资金
- National Natural Science Foundation of China [21701110]
- ShanghaiTech University
- ChEM of the SPST at ShanghaiTech [EM02161943]
Metal-organic frameworks (MOFs) is a promising class of sorbent materials for swing adsorption gas separation. However, although sorption kinetics plays a major role in column breakthrough experiments, it is rarely studied with MOF materials. This is largely because the synthesis of uniform yet separation relevant MOFs is a challenging task. Here, we report a dual modulation approach for the synthesis of well-defined Mg-MOF-74 hexagonal rods with an extremely uniform size distribution (polydispersity index = 1.02). Through epitaxial growth and wet chemical etching, uniform hollow Ni-MOF-74 with plate-shaped caps were obtained. CO, adsorption kinetic study shows that hollow Ni-MOF-74 exhibits 54% faster diffusion rate compared to solid Ni-MOF-74 due to a shortened diffusion length, despite their identical CO, uptake capacity. This has led to a 21% extension of column breakthrough time during CO2/N-2 separation under identical conditions.
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