TY - JOUR
T1 - MIL-101(Cr) Microporous Nanocrystals Intercalating Graphene Oxide Membrane for Efficient Hydrogen Purification
AU - Cheng, Long
AU - Yang, Haonan
AU - Chen, Xingyu
AU - Liu, Guozhen
AU - Guo, Yanan
AU - Liu, Gongping
AU - Jin, Wanqin
N1 - Publisher Copyright:
© 2021 Wiley-VCH GmbH
PY - 2021/10/18
Y1 - 2021/10/18
N2 - Graphene oxide (GO) is a promising two-dimensional building block for fabricating high-performance gas separation membranes. Whereas the tortuous transport pathway may increase the transport distance and lead to a low gas permeation rate, introducing spacers into GO laminates is an effective strategy to enlarge the interlayer channel for enhanced gas permeance. Herein, we propose to intercalate CO2-philic MIL-101(Cr) metal-organic framework nanocrystals into the GO laminates to construct a 2D/3D hybrid structure for gas separation. The interlayer channels were partially opened up to accelerate gas permeation. Meanwhile, the intrinsic pores of MIL-101 provided additional transport pathways, and the affinity of MIL-101 to CO2 molecules resulted in higher H2/CO2 diffusion selectivity, leading to a simultaneous enhancement in gas permeance and separation selectivity. The MIL-101(Cr)/GO membrane with optimal structures exhibited outstanding and stable mixed-gas separation performance with H2 permeance of 67.5 GPU and H2/CO2 selectivity of 30.3 during the 120-h continuous test, demonstrating its potential in H2 purification application.
AB - Graphene oxide (GO) is a promising two-dimensional building block for fabricating high-performance gas separation membranes. Whereas the tortuous transport pathway may increase the transport distance and lead to a low gas permeation rate, introducing spacers into GO laminates is an effective strategy to enlarge the interlayer channel for enhanced gas permeance. Herein, we propose to intercalate CO2-philic MIL-101(Cr) metal-organic framework nanocrystals into the GO laminates to construct a 2D/3D hybrid structure for gas separation. The interlayer channels were partially opened up to accelerate gas permeation. Meanwhile, the intrinsic pores of MIL-101 provided additional transport pathways, and the affinity of MIL-101 to CO2 molecules resulted in higher H2/CO2 diffusion selectivity, leading to a simultaneous enhancement in gas permeance and separation selectivity. The MIL-101(Cr)/GO membrane with optimal structures exhibited outstanding and stable mixed-gas separation performance with H2 permeance of 67.5 GPU and H2/CO2 selectivity of 30.3 during the 120-h continuous test, demonstrating its potential in H2 purification application.
KW - H/CO separation
KW - MIL-101(Cr)
KW - enlarged interlayer channel
KW - graphene oxide membrane
KW - nanocrystal intercalation
UR - http://www.scopus.com/inward/record.url?scp=85113821886&partnerID=8YFLogxK
U2 - 10.1002/asia.202100834
DO - 10.1002/asia.202100834
M3 - 文章
C2 - 34384002
AN - SCOPUS:85113821886
SN - 1861-4728
VL - 16
SP - 3162
EP - 3169
JO - Chemistry - An Asian Journal
JF - Chemistry - An Asian Journal
IS - 20
ER -