The influence of cations intercalated in graphene oxide membranes in tuning H2/CO2 separation performance

Chong Yang Chuah; Lina Nie; Jong Min Lee; Tae Hyun Bae

doi:10.1016/j.seppur.2020.116933

The influence of cations intercalated in graphene oxide membranes in tuning H₂/CO₂ separation performance

Chong Yang Chuah, Lina Nie, Jong Min Lee^*, Tae Hyun Bae

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

36 Citations (Scopus)

Abstract

Graphene oxide (GO) laminate membranes of controlled interlayer spacing were synthesized for the investigation in H₂/CO₂ separation. The interlayer distance of GO flakes was tuned by crosslinking and intercalation of La³⁺ or Co²⁺ cations between GO layers. Investigation via field-emission scanning electron microscope showed that a continuous selective layer was present in the GO-La³⁺, GO-Co²⁺ and GO membranes. Gas permeation results revealed that the GO-La³⁺ membrane had better H₂ permeability and H₂/CO₂ selectivity than the other membranes, due to an increase in d-spacing between the GO layers and restricted defect formation in the GO laminate membranes. In addition, the H₂/CO₂ separation performance of GO-La³⁺ membrane was found to be close to the upper bound limit of conventional polymer membranes established in 2008.

Original language	English
Article number	116933
Journal	Separation and Purification Technology
Volume	246
DOIs	https://doi.org/10.1016/j.seppur.2020.116933
Publication status	Published - Sept 1 2020
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2020 Elsevier B.V.

ASJC Scopus Subject Areas

Analytical Chemistry
Filtration and Separation

Keywords

Graphene oxide
H/CO separation
Intercalation
Interlayer spacing
Membrane

Access to Document

10.1016/j.seppur.2020.116933

Cite this

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title = "The influence of cations intercalated in graphene oxide membranes in tuning H2/CO2 separation performance",

abstract = "Graphene oxide (GO) laminate membranes of controlled interlayer spacing were synthesized for the investigation in H2/CO2 separation. The interlayer distance of GO flakes was tuned by crosslinking and intercalation of La3+ or Co2+ cations between GO layers. Investigation via field-emission scanning electron microscope showed that a continuous selective layer was present in the GO-La3+, GO-Co2+ and GO membranes. Gas permeation results revealed that the GO-La3+ membrane had better H2 permeability and H2/CO2 selectivity than the other membranes, due to an increase in d-spacing between the GO layers and restricted defect formation in the GO laminate membranes. In addition, the H2/CO2 separation performance of GO-La3+ membrane was found to be close to the upper bound limit of conventional polymer membranes established in 2008.",

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AU - Chuah, Chong Yang

AU - Nie, Lina

AU - Lee, Jong Min

AU - Bae, Tae Hyun

PY - 2020/9/1

Y1 - 2020/9/1

N2 - Graphene oxide (GO) laminate membranes of controlled interlayer spacing were synthesized for the investigation in H2/CO2 separation. The interlayer distance of GO flakes was tuned by crosslinking and intercalation of La3+ or Co2+ cations between GO layers. Investigation via field-emission scanning electron microscope showed that a continuous selective layer was present in the GO-La3+, GO-Co2+ and GO membranes. Gas permeation results revealed that the GO-La3+ membrane had better H2 permeability and H2/CO2 selectivity than the other membranes, due to an increase in d-spacing between the GO layers and restricted defect formation in the GO laminate membranes. In addition, the H2/CO2 separation performance of GO-La3+ membrane was found to be close to the upper bound limit of conventional polymer membranes established in 2008.

AB - Graphene oxide (GO) laminate membranes of controlled interlayer spacing were synthesized for the investigation in H2/CO2 separation. The interlayer distance of GO flakes was tuned by crosslinking and intercalation of La3+ or Co2+ cations between GO layers. Investigation via field-emission scanning electron microscope showed that a continuous selective layer was present in the GO-La3+, GO-Co2+ and GO membranes. Gas permeation results revealed that the GO-La3+ membrane had better H2 permeability and H2/CO2 selectivity than the other membranes, due to an increase in d-spacing between the GO layers and restricted defect formation in the GO laminate membranes. In addition, the H2/CO2 separation performance of GO-La3+ membrane was found to be close to the upper bound limit of conventional polymer membranes established in 2008.

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