TY - JOUR
T1 - Effective NaCl and dye rejection of hybrid graphene oxide/graphene layered membranes
AU - Morelos-Gomez, Aaron
AU - Cruz-Silva, Rodolfo
AU - Muramatsu, Hiroyuki
AU - Ortiz-Medina, Josue
AU - Araki, Takumi
AU - Fukuyo, Tomoyuki
AU - Tejima, Syogo
AU - Takeuchi, Kenji
AU - Hayashi, Takuya
AU - Terrones, Mauricio
AU - Endo, Morinobu
N1 - Funding Information:
This work was supported by the Center of Innovation Program, Global Aqua Innovation Center for Improving Living Standards and Water Sustainability, from the Japan Science and Technology Agency (JST).
Publisher Copyright:
© 2017 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.
PY - 2017/11/1
Y1 - 2017/11/1
N2 - 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.
AB - 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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U2 - 10.1038/nnano.2017.160
DO - 10.1038/nnano.2017.160
M3 - Article
C2 - 28846102
AN - SCOPUS:85032905381
SN - 1748-3387
VL - 12
SP - 1083
EP - 1088
JO - Nature nanotechnology
JF - Nature nanotechnology
IS - 11
ER -