Graphene oxide nanofiltration membranes for desalination under realistic conditions

Wang, Zhongzhen; Ma, Chao; Xu, Chunyan; Sinquefield, Scott A.; Shofner, Meisha L.; Nair, Sankar

doi:10.1038/s41893-020-00674-3

Cited by 155 publications

(103 citation statements)

References 48 publications

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“…GO-based membranes are great promising for advanced nanofiltration in water treatments, however, their narrow interlayer channels generally limit the water flux and the separation of larger organic molecules 45 . Generally, the separation mechanism of GO membranes is governed primarily by the interlayer spacing between the nanosheets and the length or tortuosity of the transport pathways 46 .…”

Section: Resultsmentioning

confidence: 99%

General synthesis of ultrafine metal oxide/reduced graphene oxide nanocomposites for ultrahigh-flux nanofiltration membrane

et al. 2022

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Graphene-based membranes have great potential to revolutionize nanofiltration technology, but achieving high solute rejections at high water flux remains extremely challenging. Herein, a family of ultrafine metal oxide/reduced graphene oxide (rGO) nanocomposites are synthesized through a heterogenous nucleation and diffusion-controlled growth process for dye nanofiltration. The synthesis is based on the utilization of oxygen functional groups on GO surface as preferential active sites for heterogeneous nucleation, leading to the formation of sub-3 nm size, monodispersing as well as high-density loading of metal oxide nanoparticles. The anchored ultrafine nanoparticles could inhibit the wrinkling of the rGO nanosheet, forming highly stable colloidal solutions for the solution processing fabrication of nanofiltration membranes. By functioning as pillars, the nanoparticles remarkably increase both vertical interlayer spacing and lateral tortuous paths of the rGO membranes, offering a water permeability of 225 L m−2 h−1 bar−1 and selectivity up to 98% in the size-exclusion separation of methyl blue.

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Section: Resultsmentioning

confidence: 99%

General synthesis of ultrafine metal oxide/reduced graphene oxide nanocomposites for ultrahigh-flux nanofiltration membrane

et al. 2022

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“…SEM images of as-prepared membrane showed that there was no apparent morphological change after metal cation modifications ( Figures S4 A and S4B). We note that compared with the method of mixing of GO solution and salt solution together before membrane filtration ( Mathesh et al., 2013 ; Sun et al., 2013 ; Wang et al., 2021 ), our modification method can avoid the aggregation or crumpling of GO flakes, thus guaranteeing the layered structure and the well-defined two-dimensional channels within the GO membrane ( Figure S4 C).…”

Section: Resultsmentioning

confidence: 99%

Tuning transport in graphene oxide membrane with single-site copper (II) cations

Wang

Hoenig

et al. 2022

iScience

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“…Nano ltration performance of ZnO/rGO membranes. GO-based membranes are great promising for advanced nano ltration in water treatments, however their narrow interlayer channels generally limit the water ux and the separation of larger organic molecules [39]. Generally, the separation mechanism of GO-membranes is governed primarily by the interlayer spacing between the nanosheets and the length or tortuosity of the transport pathways [40].…”

Section: Resultsmentioning

confidence: 99%

General Synthesis of Ultrafine Metal Oxide/Reduced Graphene Oxide Nanocomposites for Ultrahigh-Flux Nanofiltration Membrane

Zhang¹,

Xu²,

Xie³

et al. 2021

Preprint

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Graphene-based membranes have great potential to revolutionize nanofiltration technology, but achieving high solute rejections at high water flux remains extremely challenging. Herein, a family of ultrafine metal oxide/reduced graphene oxide (rGO) nanocomposites are synthesized through a heterogenous nucleation and diffusion-controlled growth process for dye nanofiltration. The synthesis is based on the utilization of oxygen functional groups on GO surface as preferential active sites for heterogeneous nucleation, leading to the formation of sub-3nm size, monodispersing as well as high-density loading of metal oxide nanoparticles. The anchored ultrafine nanoparticles could inhibit the wrinkling of the rGO nanosheet, forming highly stable colloidal solutions for solution-processing fabrication of nanofiltration membranes. By functioning as pillars, the nanoparticles remarkably increase both vertical interlayer spacing and lateral tortuous paths of the rGO membranes, offering an unprecedented water permeability of 225 L m− 2 h− 1 bar − 1 and a high selectivity up to 98% in the size-exclusion separation of methyl blue.

show abstract

Graphene oxide nanofiltration membranes for desalination under realistic conditions

Cited by 155 publications

References 48 publications

General synthesis of ultrafine metal oxide/reduced graphene oxide nanocomposites for ultrahigh-flux nanofiltration membrane

General synthesis of ultrafine metal oxide/reduced graphene oxide nanocomposites for ultrahigh-flux nanofiltration membrane

Tuning transport in graphene oxide membrane with single-site copper (II) cations

General Synthesis of Ultrafine Metal Oxide/Reduced Graphene Oxide Nanocomposites for Ultrahigh-Flux Nanofiltration Membrane

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