Bioinspired hierarchical porous membrane for efficient uranium extraction from seawater

Yang, Linjie; Xiao, Hongling; Qian, Yongchao; Zhao, Xiaolu; Kong, Xiangyu; Liu, Pei; Xin, Weiwen; Fu, Lin; Jiang, Lei; Wen, Liping

doi:10.1038/s41893-021-00792-6

Cited by 162 publications

(78 citation statements)

References 54 publications

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“…Next, the adsorption kinetics were studied to evaluate the adsorption rate and capacity. As shown in Figure 2d, the membrane displayed a two‐stage adsorption behavior, which is similar to that of adsorbents with hierarchical pore structures [30] . In the first stage, quick iodine uptake occurred within 1 h due to the easy transfer of iodine from the external environment to the surface of CC3 nanocrystals by means of larger mesopores and macropores.…”

Section: Resultsmentioning

confidence: 55%

Hierarchically Porous Poly(ionic liquid) – Organic Cage Composite Membrane for Efficient Iodine Capture

Zhao

Liu

Sun

2022

Chemistry A European J

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The effective capture of iodine with high volatility and poisonousness is significant for reprocessing the spent nuclear fuel. In this article, we report a hierarchically porous poly(ionic liquid)-organic cage composite membrane (PIL@CC3) possessing a gradient content distribution of CC3 cage crystals throughout the membrane to capture iodine vapor. The introduction of microporous CC3 can significantly enhance the uptake capacity of iodine up to 980 mg g À 1 , which is superior to that of a pristine PIL membrane carrying large meso-and macropores (99 mg g À 1 ), and CC3 crystalline powder (662 mg g À 1 ). Such enhanced performance benefits from the micro-meso-macroporous structure of the PIL@CC3 membrane in which the large meso-and macropores facilitate the mass transfer of iodine molecules from the external environment into the surface of the CC3 crystal, followed by diffusion of iodine molecules from the CC3 surface into the interior and exterior pores of the CC3 crystal. In addition, the asymmetric distribution of CC3 crystals across the PIL@CC3 membrane also displays its advantage in intercepting trace iodine, revealing its great potential for practical application. This study provides an idea for constructing hierarchically porous membrane composites for the removal of toxic vapors.

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Section: Resultsmentioning

confidence: 55%

Hierarchically Porous Poly(ionic liquid) – Organic Cage Composite Membrane for Efficient Iodine Capture

Zhao

Liu

Sun

2022

Chemistry A European J

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“…The microporous polymer is amidoxime modified polymer of intrinsic microporosity (AOPIM-1) polymer, which owns a rigid and contorted three-dimensional structure in its backbone. The ineffective chain packing brings high specific surface area up to 550 m 2 g −1 and produces interconnected free volume elements with a size of less than 2 nm 34 – 38 . The amidoxime modification endows the polymer with good solution processability and provides abundant adsorption sites for selectively adsorbing charged molecules.…”

Section: Introductionmentioning

confidence: 99%

Microporous polymer adsorptive membranes with high processing capacity for molecular separation

et al. 2022

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Trade-off between permeability and nanometer-level selectivity is an inherent shortcoming of membrane-based separation of molecules, while most highly porous materials with high adsorption capacity lack solution processability and stability for achieving adsorption-based molecule separation. We hereby report a hydrophilic amidoxime modified polymer of intrinsic microporosity (AOPIM-1) as a membrane adsorption material to selectively adsorb and separate small organic molecules from water with ultrahigh processing capacity. The membrane adsorption capacity for Rhodamine B reaches 26.114 g m−2, 10–1000 times higher than previously reported adsorptive membranes. Meanwhile, the membrane achieves >99.9% removal of various nano-sized organic molecules with water flux 2 orders of magnitude higher than typical pressure-driven membranes of similar rejections. This work confirms the feasibility of microporous polymers for membrane adsorption with high capacity, and provides the possibility of adsorptive membranes for molecular separation.

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“…Compared with lipid membranes, solid-state nanopores/nanochannels possess high mechanical strength, stability and operability in harsh environments. [26][27][28] Thus, they have attracted considerable attention and sparked enormous applications from interdisciplinary fields of chemistry, biology, materials science and nanotechnology. [29][30][31][32][33] According to the various structure features in different dimensions, solid-state nanopores/nanochannels can be divided into one dimensional (1D), two dimensional (2D), three dimensional (3D) nanochannels and heterogenous structures that combined with diverse dimensions.…”

Section: Introductionmentioning

confidence: 99%

“…The lipid‐membrane‐based nanodevices possess the advantages in terms of good biological compatibility for the applications of cells and vesicles analysis; [23–25] however, the functions are strictly limited by the surrounding environments and the lipid membranes are relatively fragile, which are difficult to be compatible with other components. Compared with lipid membranes, solid‐state nanopores/nanochannels possess high mechanical strength, stability and operability in harsh environments [26–28] . Thus, they have attracted considerable attention and sparked enormous applications from interdisciplinary fields of chemistry, biology, materials science and nanotechnology [29–33] …”

Section: Introductionmentioning

confidence: 99%

Light‐Controlled Ionic/Molecular Transport through Solid‐State Nanopores and Nanochannels

Jiang

et al. 2022

Chemistry An Asian Journal

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Biological nanochannels perfectly operate in organisms and exquisitely control mass transmembrane transport for complex life process. Inspired by biological nanochannels, plenty of intelligent artificial solid‐state nanopores and nanochannels are constructed based on various materials and methods with the development of nanotechnology. Specially, the light‐controlled nanopores/nanochannels have attracted much attention due to the unique advantages in terms of that ion and molecular transport can be regulated remotely, spatially and temporally. According to the structure and function of biological ion channels, light‐controlled solid‐state nanopores/nanochannels can be divided into light‐regulated ion channels with ion gating and ion rectification functions, and light‐driven ion pumps with active ion transport property. In this review, we present a systematic overview of light‐controlled ion channels and ion pumps according to the photo‐responsive components in the system. Then, the related applications of solid‐state nanopores/nanochannels for molecular sensing, water purification and energy conversion are discussed. Finally, a brief conclusion and short outlook are offered for future development of the nanopore/nanochannel field.

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Bioinspired hierarchical porous membrane for efficient uranium extraction from seawater

Cited by 162 publications

References 54 publications

Hierarchically Porous Poly(ionic liquid) – Organic Cage Composite Membrane for Efficient Iodine Capture

Hierarchically Porous Poly(ionic liquid) – Organic Cage Composite Membrane for Efficient Iodine Capture

Microporous polymer adsorptive membranes with high processing capacity for molecular separation

Light‐Controlled Ionic/Molecular Transport through Solid‐State Nanopores and Nanochannels

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