Heterogeneous graphene oxide membrane for rectified ion transport

Fei, Wenwen; Xue, Minmin; Qiu, Hu; Guo, Wei

doi:10.1039/c8nr07557c

Cited by 31 publications

(28 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In this respect, the emerging bioinspired nanofluidic heterogeneous membranes that are constructed by the hybridization of two monolayer porous membranes have shown unprecedented superiority [16][17][18][19][20] . The synergistic effect between the two layers with inherent asymmetric structure, charge, and wettability would contribute to novel ionic transport properties such as ionic diode effect [21][22][23] . This nonlinear nanofluidic behavior allows unidirectional ion transport and thus could prohibit the flow of any current back into membrane during the energy conversion process, largely decreasing the dissipation of Gibbs free energy as Joule heat and ultimately enhancing the power generation 14,[24][25][26] .…”

mentioning

confidence: 99%

Improved osmotic energy conversion in heterogeneous membrane boosted by three-dimensional hydrogel interface

et al. 2020

View full text Add to dashboard Cite

The emerging heterogeneous membranes show unprecedented superiority in harvesting the osmotic energy between ionic solutions of different salinity. However, the power densities are limited by the low interfacial transport efficiency caused by a mismatch of pore alignment and insufficient coupling between channels of different dimensions. Here we demonstrate the use of three-dimensional (3D) gel interface to achieve high-performance osmotic energy conversion through hybridizing polyelectrolyte hydrogel and aramid nanofiber membrane. The ionic diode effect of the heterogeneous membrane facilitates one-way ion diffusion, and the gel layer provides a charged 3D transport network, greatly enhancing the interfacial transport efficiency. When used for harvesting the osmotic energy from the mixing of sea and river water, the heterogeneous membrane outperforms the state-of-the-art membranes, to the best of our knowledge, with power densities of 5.06 W m −2. The diversity of the polyelectrolyte and gel makes our strategy a potentially universal approach for osmotic energy conversion.

show abstract

mentioning

confidence: 99%

Improved osmotic energy conversion in heterogeneous membrane boosted by three-dimensional hydrogel interface

et al. 2020

View full text Add to dashboard Cite

show abstract

“…The concentration of the charge carriers inside the membrane is low, and thus yields low conducting state. This mechanism is also supported by the molecular dynamics simulation in heterogeneous 2D nanofluidic system …”

mentioning

confidence: 54%

Rectified Ion Transport Through 2D Nanofluidic Heterojunctions

Zhang

Jia

Wang

et al. 2019

Physica Rapid Research Ltrs

View full text Add to dashboard Cite

Nacre-mimetic 2D nanofluidic architectures emerge as a splendid platform for both fundamental research and practical application of the novel ionic and molecular transport phenomena on nano-and sub-nanoscale. So far, it is challenging to endow the 2D nanofluidic systems with asymmetric transport properties and tunable selectivity. Herein, a heterogeneous 2D nanofluidic membrane is fabricated by sequential deposition of negatively and positively charged graphene oxide (GO) nanosheets, and the rectified salt ion transport properties therein are investigated. A simple resistance model is proposed to explain the ionic current rectification. Intriguingly, by changing the relative portion of the two oppositely charged GO parts, the membrane selectivity can be modulated from perfect cation-selectivity to anion-selectivity. The heterogeneous GO membrane may find potential applications for water treatment and energy conversion.

show abstract

“…The increase of rectified ion transport of such heterogeneous GO composed of positively charged Polyether imide (PEI) polymer was observed once the nanochannels' charge asymmetry was strengthened by altering the electrolyte's pH serves to change the surface charge density of PEIGO and GO surface charge densities. [163] Putra et al reported strong ionic diode effects of a fabricated graphene oxidecovered poly (ethylene terephthalate) microhole in aqueous HCl solution. The results demonstrated higher diode impacts at higher ionic strength (0.5 m).…”

Section: Ion Rectification (Icr) In An Asymmetric Nanochannelmentioning

confidence: 99%

Ion Selective Nanochannels: From Critical Principles to Sensing and Biosensing Applications

Soozanipour

Sohrabi

Abazar

et al. 2021

Adv Materials Technologies

View full text Add to dashboard Cite

High throughput; (D) Mold and releasing issue, hard to form deep channels Large scale channel array, 2D channel, 1D nanoslit Thin film deposition 30-200 Polysilicon, Silicon dioxide, Silicon nitride, polymer (A) simple process, low cost, fast; (D) Hard to form uniform channels large scale array, 2D channel, 1D nanoslit Hot embossing >50 PET, PC, PS, PMMA, etc. (A) Simple process, low cost; (D) Easy to deformation Large scale array, 2D channel, 1D nanoslit deformation of PDMS 100-800 PDMS (A) Simple process, low cost; (D) Low yield large scale array, V-shaped channel, 2D channel Stress release 20-800 PS, PDMS, Photoresist (A) Low cost, maskless, simple process; (D) Low resolution, Low yield large scale array, V-shaped channel, 1D nanoslit Molecular self-assembly 20-800 Ti, Silicon, Polymer, etc. (A) Low cost; (D) Complex process, Low yield 2D channel, 1D nanoslit

show abstract

Heterogeneous graphene oxide membrane for rectified ion transport

Abstract: We demonstrate heterogeneous GO membranes with highly rectified ion transport and employ molecular dynamics simulations to reveal ion behavior.

Cited by 31 publications

References 38 publications

Improved osmotic energy conversion in heterogeneous membrane boosted by three-dimensional hydrogel interface

Improved osmotic energy conversion in heterogeneous membrane boosted by three-dimensional hydrogel interface

Rectified Ion Transport Through 2D Nanofluidic Heterojunctions

Ion Selective Nanochannels: From Critical Principles to Sensing and Biosensing Applications

Contact Info

Product

Resources

About