Two-Dimensional Sodium Channels with High Selectivity and Conductivity for Osmotic Power Generation from Wastewater

Huang, Tao; Kan, Xiaonan; Fan, Jilong; Gao, Hongfei; Yu, Lei; Zhang, Li; Xia, Jiaxiang; Gao, Jun; Liu, Xueli; Sui, Kunyan; Jiang, Lei

doi:10.1021/acsnano.3c05149

Cited by 14 publications

(8 citation statements)

References 44 publications

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“…It is seen that DAC‐Ti 0.87 O 2 membranes almost cannot produce electricity under a 0.1 M/0 M methylene blue gradient (Figure S39), which is attributed to the inability of dye molecules to pass through the membrane. This result demonstrates that DAC‐Ti 0.87 O 2 membranes can effectively prevent organic pollution [12] . Next, we found that the osmotic energy performance is dependent on the environmental pH and temperature.…”

Section: Resultsmentioning

confidence: 55%

“…This suggests the great application viability of the DAC‐Ti 0.87 O 2 membranes in real multiple‐ion environments. We also tested the power generation performance of the membrane by using the organic dye of methylene blue to assess the antifouling ability of DAC‐Ti 0.87 O 2 membranes [12] . It is seen that DAC‐Ti 0.87 O 2 membranes almost cannot produce electricity under a 0.1 M/0 M methylene blue gradient (Figure S39), which is attributed to the inability of dye molecules to pass through the membrane.…”

Section: Resultsmentioning

confidence: 99%

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Bio‐inspired Double Angstrom‐Scale Confinement in Ti‐deficient Ti_0.87O₂ Nanosheet Membranes for Ultrahigh‐performance Osmotic Power Generation

Liu,

Ye,

Zhang

et al. 2023

Angew Chem Int Ed

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Osmotic power, a clean energy source, can be harvested from the salinity difference between seawater and river water. However, the output power densities are hampered by the trade‐off between ion selectivity and ion permeability. Here we propose an effective strategy of double angstrom‐scale confinement (DAC) to design ion‐permselective channels with enhanced ion selectivity and permeability simultaneously. The fabricated DAC‐Ti0.87O2 membranes possess both Ti atomic vacancies and an interlayer free spacing of ≈2.2 Å, which not only generates a profitable confinement effect for Na+ ions to enable high ion selectivity but also induces a strong interaction with Na+ ions to benefit high ion permeability. Consequently, when applied to osmotic power generation, the DAC‐Ti0.87O2 membranes achieved an ultrahigh power density of 17.8 W m−2 by mixing 0.5/0.01 M NaCl solution and up to 114.2 W m−2 with a 500‐fold salinity gradient, far exceeding all the reported macroscopic‐scale membranes. This work highlights the potential of the construction of DAC ion‐permselective channels for two‐dimensional materials in high‐performance nanofluidic energy systems.

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Section: Resultsmentioning

confidence: 55%

Section: Resultsmentioning

confidence: 99%

Bio‐inspired Double Angstrom‐Scale Confinement in Ti‐deficient Ti_0.87O₂ Nanosheet Membranes for Ultrahigh‐performance Osmotic Power Generation

Liu,

Ye,

Zhang

et al. 2023

Angew Chem Int Ed

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“…Experimental water droplet adsorption studies (Figure S27) confirm that water can transfer through the nanochannels formed by 2H-MoS 2 . Within METs, this process is driven by water evaporation and penetration for the existence of a flow potential within the nanochannels, resulting in the generation of an abundant negative ion layer . Furthermore, when water molecules diffuse into channels of similar width as the EDL, the flow of negative ions is obstructed, leading to the accumulation of more negative ions on the surface (Figure a bottom).…”

Section: Results and Discussionmentioning

confidence: 99%

Vertical Phase-Engineering MoS₂ Nanosheet-Enhanced Textiles for Efficient Moisture-Based Energy Generation

Cao,

Su,

Zheng

et al. 2023

ACS Nano

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Flexible moisture−electric generators (MEGs) capture chemical energy from atmospheric moisture for sustainable electricity, gaining attention in wearable electronics. However, challenges persist in the large-scale integration and miniaturization of MEGs for long-term, high-power output. Herein, a vertical heterogeneous phaseengineering MoS 2 nanosheet structure based silk and cotton were rationally designed and successfully applied to construct wearable MEGs for moisture−energy conversion. The prepared METs exhibit ∼0.8 V open-circuit voltage, ∼0.27 mA/cm 2 current density for >10 h, and >36.12 μW/cm 2 peak output power density, 3 orders higher than current standards. And the large-scale device realizes a current output of 0.145 A. An internal phase gradient between the 2H semiconductor MoS 2 in carbonized silks and 1T metallic MoS 2 in cotton fibers enables a phaseengineering-based heterogeneous electric double layer functioning as an equivalent parallel circuit, leading to enhanced high-power output. Owing to their facile customization for seamless adaptation to the human body, we envision exciting possibilities for these wearable METs as integrated self-power sources, enabling real-time monitoring of physiological parameters in wearable electronics.

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“…Delicate engineering of the material properties is typically necessary to break such a trade-off. For example, our previous work suggested that two-dimensional vermiculite angstrofluidic channels with highly smooth and electronegative surfaces and extremely narrow size exhibit high Na + conductivity and selectivity, showing the potential for wastewater osmotic power generation . Yet, extrapolating these channels to macroscopic membranes is challenging.…”

Section: Introductionmentioning

confidence: 99%

Light-Augmented Multi-ion Interaction in MXene Membrane for Simultaneous Water Treatment and Osmotic Power Generation

Xia,

Gao,

Pan

et al. 2023

ACS Nano

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Two-Dimensional Sodium Channels with High Selectivity and Conductivity for Osmotic Power Generation from Wastewater

Cited by 14 publications

References 44 publications

Bio‐inspired Double Angstrom‐Scale Confinement in Ti‐deficient Ti_0.87O₂ Nanosheet Membranes for Ultrahigh‐performance Osmotic Power Generation

Bio‐inspired Double Angstrom‐Scale Confinement in Ti‐deficient Ti_0.87O₂ Nanosheet Membranes for Ultrahigh‐performance Osmotic Power Generation

Vertical Phase-Engineering MoS₂ Nanosheet-Enhanced Textiles for Efficient Moisture-Based Energy Generation

Light-Augmented Multi-ion Interaction in MXene Membrane for Simultaneous Water Treatment and Osmotic Power Generation

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Two-Dimensional Sodium Channels with High Selectivity and Conductivity for Osmotic Power Generation from Wastewater

Cited by 14 publications

References 44 publications

Bio‐inspired Double Angstrom‐Scale Confinement in Ti‐deficient Ti0.87O2 Nanosheet Membranes for Ultrahigh‐performance Osmotic Power Generation

Bio‐inspired Double Angstrom‐Scale Confinement in Ti‐deficient Ti0.87O2 Nanosheet Membranes for Ultrahigh‐performance Osmotic Power Generation

Vertical Phase-Engineering MoS2 Nanosheet-Enhanced Textiles for Efficient Moisture-Based Energy Generation

Light-Augmented Multi-ion Interaction in MXene Membrane for Simultaneous Water Treatment and Osmotic Power Generation

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Product

Resources

About

Bio‐inspired Double Angstrom‐Scale Confinement in Ti‐deficient Ti_0.87O₂ Nanosheet Membranes for Ultrahigh‐performance Osmotic Power Generation

Bio‐inspired Double Angstrom‐Scale Confinement in Ti‐deficient Ti_0.87O₂ Nanosheet Membranes for Ultrahigh‐performance Osmotic Power Generation

Vertical Phase-Engineering MoS₂ Nanosheet-Enhanced Textiles for Efficient Moisture-Based Energy Generation