4.7 Article

Ultrahigh water permeance of a reduced graphene oxide nanofiltration membrane for multivalent metal ion rejection

Journal

CHEMICAL COMMUNICATIONS
Volume 56, Issue 95, Pages 15068-15071

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d0cc06302a

Keywords

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Funding

  1. National Natural Science Foundation of China [U1832150, 12074341, 11875236]
  2. Fundamental Research Funds for the Provincial Universities of Zhejiang [2020TD001]
  3. Scientific Research and Developed Fund of Zhejiang AF University [2017FR032]

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We develop a kind of pure rGO membrane using amino-hydrothermal reduction that exhibits an ultrahigh water permeance of 142.5 L m(-2) h(-1) bar(-1) while still maintaining a high rejection rate of 91.6% for multivalent metal ions. The prepared rGO membranes have two types of spacing: larger hydrophilic spacing and smaller hydrophobic spacing, resulting in superior filtration performance. This provides a new avenue for multivalent metal ion separation using pure rGO membranes.

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