The influence of cations intercalated in graphene oxide membranes in tuning H-2/CO2 separation performance

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Graphene oxide (GO) laminate membranes of controlled interlayer spacing were synthesized for the investigation in H-2/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 H-2 permeability and H-2/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 H-2/CO2 separation performance of GO-La3+ membrane was found to be close to the upper bound limit of conventional polymer membranes established in 2008.
Publisher
ELSEVIER
Issue Date
2020-09
Language
English
Article Type
Article
Citation

SEPARATION AND PURIFICATION TECHNOLOGY, v.246

ISSN
1383-5866
DOI
10.1016/j.seppur.2020.116933
URI
http://hdl.handle.net/10203/274450
Appears in Collection
CBE-Journal Papers(저널논문)
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