期刊
NANO LETTERS
卷 21, 期 19, 页码 8236-8243出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.1c02683
关键词
graphene oxide; phenolic nanomesh; membrane; chemical laminating; desalination
类别
资金
- National Natural Science Foundation of China [22008086, 21825803]
- China Postdoctoral Science Foundation [2020M671332]
- Jiangsu Postdoctoral Science Foundation [2020Z210]
A hybrid laminated structure of GO and phenolic nanomeshes was synthesized, forming membranes with enhanced water permeance and Na2SO4 rejection, outperforming most GO-based membranes. The chemically jointed laminates in the membranes also contributed to their exceptional stability in water.
Graphene oxide (GO) is receiving tremendous attention in membrane separation; however, its desalination performances remain suboptimal because of excessive swelling and tortuous transport pathways. Herein, we chemically joint GO nanosheets and phenolic nanomeshes together to form laminated membranes comprising through-plane nanopores and stabilized nanochannels. GO and phenolic/polyether nanosheets are mixed to form stacked structures and then treated in H2SO4 to remove polyether to produce nanomeshes and to chemically joint GO with phenolic nanomeshes. Thus-synthesized laminated membranes possess enhanced interlayer interactions and narrowed interlayer spacings down to 6.4 angstrom. They exhibit water permeance up to 165.6 L/ (m(2) h bar) and Na2SO4 rejection of 97%, outperforming most GO-based membranes reported so far. Moreover, the membranes are exceptionally stable in water because the chemically jointed laminates suppress the swelling of GO. This work reports hybrid laminated structures of GO and phenolic nanomeshes, which are highly desired in desalination and other applications.
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