Oriented two-dimensional zeolitic imidazolate framework-L membranes and their gas permeation properties
Zhaoxiang Zhong, Jianfeng Yao, Rizhi Chen, Zexian Low, Ming He, Jefferson Zhe Liu, Huanting Wang
Journal of Materials Chemistry A | ROYAL SOC CHEMISTRY | Published : 2015
A two-dimensional zeolitic imidazolate framework (ZIF), ZIF-L, with a unique anisotropic pore system makes it an excellent material for investigating ZIF membranes with crystallographically preferred orientation and their effects on gas separation properties. A b-oriented ZIF-L membrane was successfully prepared from a randomly oriented seed layer. In contrast, a c-oriented ZIF-L crystal layer was attached to a support through vacuum filtration in the presence of polyethyleneimine. After a short-time secondary growth, the oriented layer grew into a continuous membrane with a high degree of c-out-of-plane orientation. Gas separation studies demonstrated the orientation-dependent separation be..View full abstract
Awarded by National Natural Science Foundation of China
This work is in part supported by the Australian Research Council (ARC). H. W. thanks ARC for a Future Fellowship. Z. Z. acknowledges the support from the National Natural Science Foundation of China (no. 21276124), and thanks the Monash University for hosting his visiting research.