The influence of cations intercalated in graphene oxide membranes in tuning H₂/CO₂ separation performance
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 e...
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| Main Authors: | , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/162018 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | 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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