期刊
NATURE NANOTECHNOLOGY
卷 12, 期 11, 页码 1083-+出版社
NATURE PORTFOLIO
DOI: 10.1038/NNANO.2017.160
关键词
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资金
- Center of Innovation Program, Global Aqua Innovation Center for Improving Living Standards and Water Sustainability, from the Japan Science and Technology Agency (JST)
- Directorate For Engineering
- Div Of Industrial Innovation & Partnersh [1540018] Funding Source: National Science Foundation
- Grants-in-Aid for Scientific Research [15H03537] Funding Source: KAKEN
Carbon nanomaterials are robust and possess fascinating properties useful for separation technology applications, but their scalability and high salt rejection when in a strong cross flow for long periods of time remain challenging. Here, we present a graphene-based membrane that is prepared using a simple and environmentally friendly method by spray coating an aqueous dispersion of graphene oxide/few-layered graphene/deoxycholate. The membranes were robust enough to withstand strong cross-flow shear for a prolonged period (120 h) while maintaining NaCl rejection near 85% and 96% for an anionic dye. Experimental results and molecular dynamic simulations revealed that the presence of deoxycholate enhances NaCl rejection in these graphene-based membranes. In addition, these novel hybrid-layered membranes exhibit better chlorine resistance than pure graphene oxide membranes. The desalination performance and aggressive shear and chlorine resistance of these scalable graphene-based membranes are promising for use in practical water separation applications.
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