Ultrathin graphene oxide-based hollow fiber membranes with brush-like CO2-philic agent for highly efficient CO2 capture

Among the current CO 2 capture technologies, membrane gas separation has many inherent advantages over other conventional techniques. However, fabricating gas separation membranes with both high CO 2 permeance and high CO 2 /N 2 selectivity, especially under wet conditions, is a challenge. In this s...

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Published in:Nature communications Vol. 8; no. 1; pp. 1 - 8
Main Authors: Zhou, Fanglei, Tien, Huynh Ngoc, Xu, Weiwei L., Chen, Jung-Tsai, Liu, Qiuli, Hicks, Ethan, Fathizadeh, Mahdi, Li, Shiguang, Yu, Miao
Format: Journal Article
Language:English
Published: London Nature Publishing Group UK 13.12.2017
Nature Publishing Group
Nature Portfolio
Subjects:
639/301/299/1013
639/301/357/918/1053
639/638/542
639/925/918
Brushes
Carbon dioxide
Carbon sequestration
Chemical bonds
Flue gas
Gas membrane separation
Gas separation
Graphene
Hollow fiber membranes
Humanities and Social Sciences
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
MATERIALS SCIENCE
mechanical and structural properties and devices
Membrane structure
Membranes
multidisciplinary
Piperazine
porous materials
Reluctance
Science
Science (multidisciplinary)
Selectivity
surface chemistry
ISSN:2041-1723, 2041-1723
Online Access:Get full text
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Summary:Among the current CO 2 capture technologies, membrane gas separation has many inherent advantages over other conventional techniques. However, fabricating gas separation membranes with both high CO 2 permeance and high CO 2 /N 2 selectivity, especially under wet conditions, is a challenge. In this study, sub-20-nm thick, layered graphene oxide (GO)-based hollow fiber membranes with grafted, brush-like CO 2 -philic agent alternating between GO layers are prepared by a facile coating process for highly efficient CO 2 /N 2 separation under wet conditions. Piperazine, as an effective CO 2 -philic agent, is introduced as a carrier-brush into the GO nanochannels with chemical bonding. The membrane exhibits excellent separation performance under simulated flue gas conditions with CO 2 permeance of 1,020 GPU and CO 2 /N 2 selectivity as high as 680, demonstrating its potential for CO 2 capture from flue gas. We expect this GO-based membrane structure combined with the facile coating process to facilitate the development of ultrathin GO-based membranes for CO 2 capture. Membrane separation technologies show promise for CO 2 capture, but typically suffer from a trade-off between permeance and selectivity. Here, the authors produce hollow fiber membranes coated with graphene oxide and a CO 2 -philic agent that can efficiently separate CO 2 from flue gas under wet conditions.
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USDOE Office of Fossil Energy (FE)
FE0026383
ISSN:2041-1723
2041-1723
DOI:10.1038/s41467-017-02318-1