Hydrodynamic slip enhanced nanofluidic reverse electrodialysis for salinity gradient energy harvesting

Long, Rui; Zhao, Yanan; Kuang, Zhengfei; Liu, Wei

doi:10.1016/j.desal.2019.114263

Cited by 30 publications

(22 citation statements)

References 48 publications

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“…[21] When the inner pore surface becomes slipping, electric power could also be promoted by the enhanced ionic flux due to the weak viscous force between fluid flow and pore surface. [27,28]…”

Section: Resultsmentioning

confidence: 99%

“…[13] Larger slip length of pore walls was also found to be able to improve the output power potentially, which lowered the viscous friction of fluid and enhanced the ion flux. [27,28] In the OEC study, simulations were mainly conducted using nanopores with above 200 nm in length, of which ionic selectivity was mainly determined by the charged inner surface. [13,15,29] The influence of charged exterior membrane surfaces has been rarely considered, which affect the ionic transport significantly in short nanopores, especially for the porous membranes with relative low porosities.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

High-performance nanofluidic osmotic power generation enabled by exterior surface charges under the natural salt gradient

Yuan

et al. 2021

Journal of Power Sources

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High-performance nanofluidic osmotic power generation enabled by exterior surface charges under the natural salt gradient

Yuan

et al. 2021

Journal of Power Sources

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“…ICR can be induced by asymmetry in the nanopore geometry, as done in conically shaped nanopores, 2 as well as nanopores with a stepped cross section. 12 Asymmetric surface properties of nanopores, for example, asymmetric charge density, 13 wettability, 14 and slip length, 15 of surfaces along the pore axis can also produce ICR. Nanopores in contact with solutions that differed in conductivity achieved by concentration gradients 16 and viscosity gradients 17,18 were reported to exhibit current rectification as well.…”

Section: ■ Introductionmentioning

confidence: 99%

“…ICR can be induced by asymmetry in the nanopore geometry, as done in conically shaped nanopores, as well as nanopores with a stepped cross section . Asymmetric surface properties of nanopores, for example, asymmetric charge density, wettability, and slip length, of surfaces along the pore axis can also produce ICR. Nanopores in contact with solutions that differed in conductivity achieved by concentration gradients and viscosity gradients , were reported to exhibit current rectification as well.…”

Section: Introductionmentioning

confidence: 99%

Modulation of Ionic Current Rectification in Ultrashort Conical Nanopores

Yuan

et al. 2020

Anal. Chem.

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Nanopores that exhibit ionic current rectification (ICR) behave like diodes, such that they transport ions more efficiently in one direction than the other. Conical nanopores have been shown to rectify ionic current, but only those with at least 500 nm in length exhibit significant ICR. Here, through the finite element method, we show how ICR of conical nanopores with length below 200 nm can be tuned by controlling individual charged surfaces i.e. inner pore surface (surface inner), and exterior pore surfaces on the tip and base side (surface tip and surface base). The charged surface inner and surface tip can induce obvious ICR individually, while the effects of the charged surface base on ICR can be ignored. The fully charged surface inner alone could render the nanopore counterion-selective and induces significant ion concentration polarization in the tip region, which causes reverse ICR compared to nanopores with all surface charged. In addition, the direction and degree of rectification can be further tuned by the depth of the charged surface inner. When considering the exterior membrane surface only, the charged surface tip causes intra-pore ionic enrichment and depletion under opposite biases which results in significant ICR. Its effective region is within ~40 nm beyond the tip orifice. We also found that individual charged parts of the pore system contributed to ICR in an additive way due to the additive effect on the ion concentration regulation along the pore axis. With various combinations of fully/partially charged surface inner and surface tip , diverse ICR ratios from ~2 to ~170 can be achieved. Our findings shed light on the mechanism of ionic current rectification in ultra-short conical nanopores, and provide a useful guide to the design and modification of ultra-short conical nanopores in ionic circuits and nanofluidic sensors.

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“…78,79 Regarding the focus of this review, the hydrodynamic slip has been highlighted as a phenomenon that can strongly enhance blue energy conversion in RED systems by reducing the solid-liquid viscous friction. [82][83][84]…”

Section: (B))mentioning

confidence: 99%

Nanofluidic osmotic power generators – advanced nanoporous membranes and nanochannels for blue energy harvesting

et al. 2021

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show abstract

Hydrodynamic slip enhanced nanofluidic reverse electrodialysis for salinity gradient energy harvesting

Cited by 30 publications

References 48 publications

High-performance nanofluidic osmotic power generation enabled by exterior surface charges under the natural salt gradient

High-performance nanofluidic osmotic power generation enabled by exterior surface charges under the natural salt gradient

Modulation of Ionic Current Rectification in Ultrashort Conical Nanopores

Nanofluidic osmotic power generators – advanced nanoporous membranes and nanochannels for blue energy harvesting

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