Molecule stratification in 2D heterostructured nanochannels towards enhanced selective permeation

Chen, Jingjing; Yuan, Zhijie; Wu, Xiaoli; Wang, Jingtao; Yang, Yongpeng; Li, Wenpeng; Jiang, Zhongyi

doi:10.1016/j.cej.2022.135828

Cited by 15 publications

(6 citation statements)

References 71 publications

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“…The thickness of monolayer graphene oxide is 0.8 nm and the GO/PAAS/DODAB nanosheet is ≈12 nm (Figure S7, Supporting Information). [20] The extra thickness demonstrates the strong interaction between the GO and DODAB through the N + ─O − interaction and the cation-𝜋 interaction. [33] As shown in Figure 2c, the highest tensile stress of GP membrane and GDP membrane is 25.16 and Ion polymer (PAAS) provides the surface charge to the channel and assures the selectivity, which is not benefit to ion transport because of the viscous effect.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Low‐Friction Graphene Oxide‐Based Ion Selective Membrane for High‐Efficiency Osmotic Energy Harvesting

Wang,

Chen

et al. 2023

Advanced Energy Materials

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Graphene‐based laminate membranes with selective ion‐transport capability show great potential in renewable osmotic energy harvesting. One of the great challenges is to reduce the overall energy barriers while remain the high ion selectivity in the transmembrane ion transport process. Here, a strategy is proposed to break the trade‐off between ion selectivity and permeability in laminar nanochannels using amphiphilic molecules as modifier, which enhances the surface charge density of nanochannel by loading more ion polymer with polar head and lows the frictional force of ion transport with hydrophobic tail. The conversion efficiency can reach to 32% in osmotic energy harvesting (0.5 m/0.01 m concentration gradient) after adopting this modifier. During the process of mixing real river water and seawater, the maximum power density can reach to 13.38 W m−2. The amphiphilic molecules also bind adjacent nanosheets, endowing the membrane's strong mechanical strength and high stability in aqueous solution. This work can open up a new way to regulate the transmembrane ion transport in 2D laminate membranes.

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Section: Resultsmentioning

confidence: 99%

“…Current membrane fabrication techniques, usually get stuck with the toxicity of monomer, [19] complex preparation process, [20] or high processing costs. [21] Controlling the local structure and chemical nature of membrane pores is also over-limited.…”

Section: Introductionmentioning

confidence: 99%

Low‐Friction Graphene Oxide‐Based Ion Selective Membrane for High‐Efficiency Osmotic Energy Harvesting

Wang,

Chen

et al. 2023

Advanced Energy Materials

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“…[189] In recent years, instead of relying on electrostatic effects to alternately deposit materials, researchers have proposed novel techniques to achieve LbL assemblies, such as diffusiondriven layer-by-layer (dd-LbL) assembly, [190] spray-assisted layerby-layer (SLbL) self-assembly, [191] and dual-needle electrostatic atomization. [192] By dd-LbL assembly strategy, Zou et al successfully achieved the assembly of GO nanosheets into porous frameworks which showed adjustable porosity. In addition, the technique could be used in the preparation of patterned multilayered films on solid and flexible substrates (Figure 20A).…”

Section: Layer-by-layer Assemblymentioning

confidence: 99%

“…This is due to the fact that some molecules that are more polar than water molecules prefer the GO layer, while water molecules are pushed into the rGO layer (Figure 20C). [192]…”

Section: Layer-by-layer Assemblymentioning

confidence: 99%

Bioinspired Solid‐State Ion Nanochannels: Insight from Channel Fabrication and Ion Transport

Yun

Chen

Wang

et al. 2023

Adv Materials Technologies

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With specific structures and unique features, biological ion channel proteins play crucial roles in many life processes of living organisms. Inspired by the biological ion channel proteins, researchers have developed a variety of artificial nanochannels to explore the mechanisms of selective ion transport and achieve applications in molecular filters, biosensors, and energy conversion devices. The ion transport behavior in nanochannels is mainly governed by the interaction between ions and the nanochannels interface. Herein, the structures, fabrication methods, and ion transport properties of biomimetic solid-state ion nanochannels are reviewed, with emphasis on the transport performance and mechanism of nanochannels. In addition, the current challenges faced and the future outlooks of these solid-sate ion nanochannels for practical applications are discussed.

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“…Heterostructured membrane represents an emerging platform through constructing asymmetric transfer channels toward different molecules. , Among the separation materials, the MXene-based membrane has great potential in water purification applications. On the one hand, its two-dimensional nanosheets are beneficial for selective separation.…”

Section: Introductionmentioning

confidence: 99%

Graphene Oxide Intercalated with MXene as Composite Membranes with Improved Permeability for Wastewater Treatment

Chang,

Ma,

Hou

et al. 2024

ACS Appl. Nano Mater.

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Graphene oxide (GO)-based membranes have exhibited fascinating superiority in water treatment. However, water transfer resistance caused by the tortuous interlayer pathway and swelling in aqueous solutions of GO membranes are still bottlenecks in wastewater treatment. Here, a heterostructured GO membrane was designed by intercalating amino-terminated MXene (MXene-NH 2 ) in GO layers. Specifically, the inserted MXene-NH 2 with a small size in the gap of GO layers can increase the vertical distance between GO layers and offer a shortened water transport pathway for enhanced permeability. Meanwhile, the interaction between the amino groups of MXene-NH 2 and the carboxyl groups of GO can restrict the deformation of the layered structure, thus inducing improved stability. Accordingly, the obtained GO/MXene-NH 2 composite membrane exhibited a flux of about 11.31 L/(m 2 h bar) at low pressure (1 bar), which was 4 times higher than that of the GO membrane ( ̃2.73 L/(m 2 h bar)). Meanwhile, high rejections of the membrane for different charged dyes (≥96%) remained. Besides, the GO/MXene-NH 2 membrane showed excellent antiswelling properties. This strategy provides a method for the design of a heterostructure membrane and promotes the practical application of the GO membrane.

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Molecule stratification in 2D heterostructured nanochannels towards enhanced selective permeation

Cited by 15 publications

References 71 publications

Low‐Friction Graphene Oxide‐Based Ion Selective Membrane for High‐Efficiency Osmotic Energy Harvesting

Low‐Friction Graphene Oxide‐Based Ion Selective Membrane for High‐Efficiency Osmotic Energy Harvesting

Bioinspired Solid‐State Ion Nanochannels: Insight from Channel Fabrication and Ion Transport

Graphene Oxide Intercalated with MXene as Composite Membranes with Improved Permeability for Wastewater Treatment

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