Ultrafast-Selective Nanofiltration of an Hybrid Membrane Comprising Laminated Reduced Graphene Oxide/Graphene Oxide Nanoribbons

Kyeong Min Cho, Hyeong Jin Lee, Yoon Tae Nam, Yong Jae Kim, Chansol Kim, Kyoung Min Kang, Claudio Adrian Ruiz Torres, Dae Woo Kim, Hee Tae Jung

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

In this study, reduced graphene oxide (rGO) and graphene oxide nanoribbons (GONRs) are used to fabricate a composite membrane that exhibits ultrafast water permeance (312.8 L m-2 h-1 bar-1) and precise molecular separation (molecular weight cutoff: 269 Da), which surpass the upper bound of previously reported polymer and graphene-based nanofiltration membranes. As two-dimensional GONR exhibits a width on the scale of nanometers, its nanochannels can be enlarged without hindering the stacking of rGO. Moreover, abundant oxygen-containing groups on the edge and surface of GONR enhance the electrostatic interactions between the filtered molecules and the membrane nanochannel. By the synergistic effect, rejection and water flux are considerably increased. Owing to the chemically stable nature of rGO, the composite membrane is highly stable in aqueous media (from acidic to alkaline) and is recyclable during repeated filtration tests.

Original languageEnglish
Pages (from-to)27004-27010
Number of pages7
JournalACS Applied Materials and Interfaces
Volume11
Issue number30
DOIs
Publication statusPublished - 2019 Jul 31

Bibliographical note

Funding Information:
This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2015R1A6A3A04057367) and also funded by a National Research Foundation of Korea (2018R1A2B3008658). K.M.C. was supported by the Basic Science Research Program through the NRF (2018R1A6A3A01012374).

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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