Catalytic Reduction of Graphene Oxide Membranes and Water Selective Channel Formation in Water–Alcohol Separations
Graphene oxide (GO) is a promising membrane system for chemical separation applications due to its 2-D nanofluidics properties and an ability to control interplanar spacing for selectivity. The permeance of water, methanol (MeOH) and isopropyl alcohol (IPA) through 5 µm thick membranes was found to...
| Principais autores: | , , , , |
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| Formato: | Artigo |
| Idioma: | English |
| Publicado em: |
MDPI AG
2021-04-01
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| coleção: | Membranes |
| Assuntos: | |
| Acesso em linha: | https://www.mdpi.com/2077-0375/11/5/317 |
| _version_ | 1827694068154499072 |
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| author | Yushi Zang Alex Peek Yongsoon Shin David Gotthold Bruce J. Hinds |
| author_facet | Yushi Zang Alex Peek Yongsoon Shin David Gotthold Bruce J. Hinds |
| author_sort | Yushi Zang |
| collection | DOAJ |
| description | Graphene oxide (GO) is a promising membrane system for chemical separation applications due to its 2-D nanofluidics properties and an ability to control interplanar spacing for selectivity. The permeance of water, methanol (MeOH) and isopropyl alcohol (IPA) through 5 µm thick membranes was found to be 0.38 ± 0.15, 0.33 ± 0.16 and 0.42 ± 0.31 LMH/bar (liter/m<sup>2</sup>·h·bar), respectively. Interestingly, the permeance of a water–alcohol mixture was found to be dramatically lower (~0.01 LMH/bar) than any of its components. Upon removing the solvent mixture, the transmembrane flux of the pure solvent was recovered to near the original permeance. The interlayer space of a dried GO membrane was found to be 8.52 Å, which increased to 12.19 Å. 13.26 Å and 16.20 Å upon addition of water, MeOH and IPA. A decrease in d-space, about 2 Å, was consistently observed when adding alcohol to water wetted GO membrane and an optical color change and reduction in permeance. A newly proposed mechanism of a partial reduction of GO through a catalytic reaction with the water–alcohol mixture is consistent with experimental observations. |
| first_indexed | 2024-03-10T11:57:06Z |
| format | Article |
| id | doaj.art-7b24f0322ccb486193da86bda50dc227 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-10T11:57:06Z |
| publishDate | 2021-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-7b24f0322ccb486193da86bda50dc2272023-11-21T17:11:55ZengMDPI AGMembranes2077-03752021-04-0111531710.3390/membranes11050317Catalytic Reduction of Graphene Oxide Membranes and Water Selective Channel Formation in Water–Alcohol SeparationsYushi Zang0Alex Peek1Yongsoon Shin2David Gotthold3Bruce J. Hinds4Department of Material Science and Engineering, University of Washington, Seattle, WA 98105, USADepartment of Material Science and Engineering, University of Washington, Seattle, WA 98105, USAPacific Northwest National Laboratory, Richland, WA 99352, USAPacific Northwest National Laboratory, Richland, WA 99352, USADepartment of Material Science and Engineering, University of Washington, Seattle, WA 98105, USAGraphene oxide (GO) is a promising membrane system for chemical separation applications due to its 2-D nanofluidics properties and an ability to control interplanar spacing for selectivity. The permeance of water, methanol (MeOH) and isopropyl alcohol (IPA) through 5 µm thick membranes was found to be 0.38 ± 0.15, 0.33 ± 0.16 and 0.42 ± 0.31 LMH/bar (liter/m<sup>2</sup>·h·bar), respectively. Interestingly, the permeance of a water–alcohol mixture was found to be dramatically lower (~0.01 LMH/bar) than any of its components. Upon removing the solvent mixture, the transmembrane flux of the pure solvent was recovered to near the original permeance. The interlayer space of a dried GO membrane was found to be 8.52 Å, which increased to 12.19 Å. 13.26 Å and 16.20 Å upon addition of water, MeOH and IPA. A decrease in d-space, about 2 Å, was consistently observed when adding alcohol to water wetted GO membrane and an optical color change and reduction in permeance. A newly proposed mechanism of a partial reduction of GO through a catalytic reaction with the water–alcohol mixture is consistent with experimental observations.https://www.mdpi.com/2077-0375/11/5/317catalytic membranesnanofluidicsbiofuel separations |
| spellingShingle | Yushi Zang Alex Peek Yongsoon Shin David Gotthold Bruce J. Hinds Catalytic Reduction of Graphene Oxide Membranes and Water Selective Channel Formation in Water–Alcohol Separations Membranes catalytic membranes nanofluidics biofuel separations |
| title | Catalytic Reduction of Graphene Oxide Membranes and Water Selective Channel Formation in Water–Alcohol Separations |
| title_full | Catalytic Reduction of Graphene Oxide Membranes and Water Selective Channel Formation in Water–Alcohol Separations |
| title_fullStr | Catalytic Reduction of Graphene Oxide Membranes and Water Selective Channel Formation in Water–Alcohol Separations |
| title_full_unstemmed | Catalytic Reduction of Graphene Oxide Membranes and Water Selective Channel Formation in Water–Alcohol Separations |
| title_short | Catalytic Reduction of Graphene Oxide Membranes and Water Selective Channel Formation in Water–Alcohol Separations |
| title_sort | catalytic reduction of graphene oxide membranes and water selective channel formation in water alcohol separations |
| topic | catalytic membranes nanofluidics biofuel separations |
| url | https://www.mdpi.com/2077-0375/11/5/317 |
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