Effective NaCl and dye rejection of hybrid graphene oxide/graphene layered membranes

Aaron Morelos-Gomez, Rodolfo Cruz-Silva, Hiroyuki Muramatsu, Josue Ortiz-Medina, Takumi Araki, Tomoyuki Fukuyo, Syogo Tejima, Kenji Takeuchi, Takuya Hayashi, Mauricio Terrones Maldonado, Morinobu Endo

Research output: Contribution to journalArticle

117 Scopus citations

Abstract

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.

Original languageEnglish (US)
Pages (from-to)1083-1088
Number of pages6
JournalNature nanotechnology
Volume12
Issue number11
DOIs
StatePublished - Nov 1 2017

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Atomic and Molecular Physics, and Optics
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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    Morelos-Gomez, A., Cruz-Silva, R., Muramatsu, H., Ortiz-Medina, J., Araki, T., Fukuyo, T., Tejima, S., Takeuchi, K., Hayashi, T., Terrones Maldonado, M., & Endo, M. (2017). Effective NaCl and dye rejection of hybrid graphene oxide/graphene layered membranes. Nature nanotechnology, 12(11), 1083-1088. https://doi.org/10.1038/nnano.2017.160