期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 7, 期 7, 页码 7252-7259出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.9b00282
关键词
Graphene oxide membranes; Janus graphene oxide; dodecylamine; composite; noncovalent interaction; aqueous structural stability
资金
- King Abdullah University of Science and Technology (KAUST) center competitive fund (CCF)
- Plant Research Program - Ministry of Land, Infrastructure and Transport, Republic of Korea [18IFIP-C071145-06]
Nanostructured graphene oxide (GO) membranes offer outstanding mass transport performances such as ultrahigh water flux and precise molecular sieving and thus have a great potential as a novel filtration platform for energy efficient molecular or ionic separation. However, the structural stability of the GO membranes in aqueous environments remains a challenging problem, which limits its practical application perspective. We, here, report a novel GO composite membrane composed of GO and asymmetrically functionalized Janus GO (JGO) sheets. Single-side functionalized JGO was made by amidation of dodecylamine. Incorporation of JGO in GO film exhibited extraordinary stability in water at broad pH values even under agitation. Moreover, JGO-doped GO composite membrane showed robust integrity in acid or base solutions over months. It exhibits high molecular retention above 95% for uncharged and charged dye molecules, rhodamine B, and brilliant blue G while maintaining water permeability comparable with previously reported GO-based membranes under osmotic pressure. This work significantly expands possibilities for new way to enhance the structural stability in graphene-based or 2D-material membrane and surface-selective functionalization in membrane fabrication for many applications.
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