Interfacial engineering of metal–organic frameworks/graphene oxide composite membrane by polyethyleneimine for efficient H2/CH4 gas separation

No Thumbnail Available
File version
Author(s)
Liu, Di
Pang, Guangsheng
Tang, Zhiyong
Feng, Shouhua
Griffith University Author(s)
Primary Supervisor
Other Supervisors
Editor(s)
Date
2019
Size
File type(s)
Location
License
Abstract

Interfacial engineering has demonstrated a significant effect on fabricating highly efficient membranes for gas separation. Herein, we introduced a new way to prepare a soft MOF membrane with a modified interface using polyelectrolyte branched polyethyleneimine (PEI) as the joint material. Assembled with layered graphene oxide (GO) and zeolitic imidazolate framework-8 (ZIF-8) nanocrystals, branched PEI not only functions as a soft coat onto the ZIF-8 surface to overcome the rigid nature but also well connects with GO nanosheets via electrostatic attraction, thus preventing the fracture of the membrane. When employed as the gas separation membrane for H2/CH4, the long gas diffusion pathway determined by layered GO and the accurate sieving effect endowed by ZIF-8 enable the remarkable permeance and selectivity. Furthermore, by simply altering the content of GO nanosheets and ZIF-8 nanocrystals in the composite membrane, one can easily adjust the permeance and selectivity toward the separation of H2/CH4 gas mixture.

Journal Title

Inorganic Chemistry Frontiers

Conference Title
Book Title
Edition
Volume

6

Issue

8

Thesis Type
Degree Program
School
Publisher link
Patent number
Funder(s)
Grant identifier(s)
Rights Statement
Rights Statement
Item Access Status
Note
Access the data
Related item(s)
Subject

Inorganic chemistry

Persistent link to this record
Citation

Liu, D; Pang, G; Tang, Z; Feng, S, Interfacial engineering of metal–organic frameworks/graphene oxide composite membrane by polyethyleneimine for efficient H2/CH4 gas separation, Inorganic Chemistry Frontiers, 2019, 6 (8), pp. 2043-2049

Collections