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Nanostructured Graphene Oxide Composite Membranes with Ultrapermeability and Mechanical Robustness
- Source :
- Nano Letters. 20:2209-2218
- Publication Year :
- 2020
- Publisher :
- American Chemical Society (ACS), 2020.
-
Abstract
- Graphene oxide (GO) membranes have great potential for separation applications due to their low-friction water permeation combined with unique molecular sieving ability. However, the practical use of deposited GO membranes is limited by the inferior mechanical robustness of the membrane composite structure derived from conventional deposition methods. Here, we report a nanostructured GO membrane that possesses great permeability and mechanical robustness. This composite membrane consists of an ultrathin selective GO nanofilm (as low as 32 nm thick) and a postsynthesized macroporous support layer that exhibits excellent stability in water and under practical permeability testing. By utilizing thin-film lift off (T-FLO) to fabricate membranes with precise optimizations in both selective and support layers, unprecedented water permeability (47 L·m-2·hr-1·bar-1) and high retention (>98% of solutes with hydrated radii larger than 4.9 A) were obtained.
- Subjects :
- Nanostructure
Materials science
Graphene
Mechanical Engineering
Oxide
Bioengineering
02 engineering and technology
General Chemistry
Permeation
021001 nanoscience & nanotechnology
Condensed Matter Physics
Membrane technology
law.invention
chemistry.chemical_compound
Membrane
Chemical engineering
chemistry
Thin-film composite membrane
law
General Materials Science
0210 nano-technology
Layer (electronics)
Subjects
Details
- ISSN :
- 15306992 and 15306984
- Volume :
- 20
- Database :
- OpenAIRE
- Journal :
- Nano Letters
- Accession number :
- edsair.doi.dedup.....9ce15eec6a067900717551548fda493c