Efficient Light-Driven Ion Pumping for Deep Desalination via the Vertical Gradient Protonation of Covalent Organic Framework Membranes DOI

Weipeng Xian,

Xiaoyi Xu, Yongxin Ge

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 28, 2024

Traditional desalination methods face criticism due to high energy requirements and inadequate trace ion removal, whereas natural light-driven pumps offer superior efficiency. Current synthetic systems are constrained by short exciton lifetimes, which limit their ability generate sufficient electric fields for effective pumping. We introduce an innovative approach utilizing covalent-organic framework membranes that enhance light absorption reduce charge recombination through vertical gradient protonation of imine linkages during acid-catalyzed liquid-liquid interfacial polymerization. This technique creates intralayer interlayer heterojunctions, facilitating hybridization establishing a robust built-in field under illumination. These improvements enable the achieve remarkable transport across extreme concentration gradients (2000:1), with rate approximately 3.2 × 10

Language: Английский

Optimization of cation selectivity based on channel chemistry of covalent organic framework under confined size DOI

Xiaorui Chu,

Jibin Miao,

Qianqian Ge

et al.

Journal of Membrane Science, Journal Year: 2025, Volume and Issue: unknown, P. 123860 - 123860

Published: Feb. 1, 2025

Language: Английский

Citations

1
Hybrid Energy Harvesting Enabled by a Covalent Organic Framework Membrane DOI Creative Commons
Junsin Yi,

Zhuozhi Lai,

Qing Guo

et al.

Advanced Membranes, Journal Year: 2025, Volume and Issue: unknown, P. 100130 - 100130

Published: Jan. 1, 2025

Language: Английский

Citations

0
Creating Sodium Ion Channels via De Novo Encapsulation of Ionophores for Enhanced Water Energy Harvesting DOI
Qing Guo, Zhiwei Xing,

Huaxi Guo

et al.

Advanced Materials, Journal Year: 2025, Volume and Issue: unknown

Published: March 30, 2025

Abstract Biological ion channels achieve remarkable permselectivity and cation discrimination through the synergy of their intricate architectures specialized ionophores within confined nanospaces, enabling efficient energy conversion. Emulating such selectivity in synthetic nanochannels, however, remains a persistent challenge. To address this, novel host‐guest assembly membrane is developed by incorporating sodium‐selective into β‐ketoenamine‐linked covalent organic framework (COF). This design confers exceptional Na + selectivity, achieving /K /Li ratios 3.6 103, respectively, along with near‐perfect /Cl − under 0.5 M || 0.01 salinity gradient. Notably, dynamically switches its to favor anion transport presence high‐valent cations (e.g., Ca 2+ ), overcoming limitations as uphill diffusion back currents observed conventional cation‐selective membranes. adaptive behavior yields 4.6‐fold increase output power density ‐rich environments. These findings advance biomimetic nanochannels unparalleled enhanced conversion efficiency.

Language: Английский

Citations

0
Rational design of two-dimensional nanosheets membranes for lithium extraction from brine: Recent progress and future opportunities DOI
Yingjie Xia, Ke Liu, Yuan Xiang

et al.

Desalination, Journal Year: 2025, Volume and Issue: unknown, P. 118895 - 118895

Published: April 1, 2025

Language: Английский

Citations

0
Staggered-Stacking Two-Dimensional Covalent Organic Framework Membranes for Molecular and Ionic Sieving DOI
Jingfeng Wang, Xiaoming Zhang,

Ruichen Shen

et al.

ACS Nano, Journal Year: 2024, Volume and Issue: 18(51), P. 34698 - 34707

Published: Dec. 10, 2024

Two-dimensional covalent organic frameworks (2D COFs), a family of crystalline materials with abundant porous structures offering nanochannels for molecular transport, have enormous potential in the applications separation, energy storage, and catalysis. However, 2D COFs remain limited by relatively large pore sizes (>1 nm) weak interlayer interactions between nanosheets, making it difficult to achieve efficient membranes meet selective sieving requirements water molecules (0.3 hydrated salt ions (>0.7 nm). Here, we report high-performance COF membrane narrowed channels (0.7 × 0.4 nm2) excellent mechanical performance constructed staggered stacking cationic anionic nanosheets selectively ions. The has been improved two times than that single-phase due enhanced nanosheets. stacked exhibit significantly monovalent rejection ratio (up 77.9%) compared (∼49.2%), while maintaining comparable permeability. design provides strategy constructing nanoporous precise ionic sieving.

Language: Английский

Citations

3
Efficient Ion Screening Boosted by MOF/COF Bilayer Membrane Through Multiple Separation Mechanisms DOI

Yu Ma,

Lin Liu,

Ruihe Yu

et al.

Small, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 27, 2024

Abstract Porous organic frameworks (POFs), including metal‐organic (MOFs) and covalent (COFs), have drawn attention as ion‐selective materials due to their well‐defined channels functional sites. However, individual limitations require novel approaches maximize potential. In this study, a hybrid bilayer membrane combining MOFs COFs on nylon substrate via consecutive liquid‐liquid interface polymerization is developed. This method forms robust chemical bonds between the MOF COF layers, creating efficient ion transport channels. The integration of ZIF‐8 (MOF layer), which exhibits strong electrostatic repulsion against cations, with TpPa‐SO 3 H (COF offering cation coordination, results in synergistic effect that significantly enhances separation. ZIF‐8/TpPa‐SO H/nylon achieved Li + /Mg 2+ separation ratio 501, 400 times higher than pristine 200 membrane. outstanding performance combined layer coordination layer, enabling precise discrimination. membrane's structural integrity stability further contribute its superior efficiency, making it promising candidate for large‐scale lithium extraction from salt lakes.

Language: Английский

Citations

2
Efficient Light-Driven Ion Pumping for Deep Desalination via the Vertical Gradient Protonation of Covalent Organic Framework Membranes DOI

Weipeng Xian,

Xiaoyi Xu, Yongxin Ge

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 28, 2024

Traditional desalination methods face criticism due to high energy requirements and inadequate trace ion removal, whereas natural light-driven pumps offer superior efficiency. Current synthetic systems are constrained by short exciton lifetimes, which limit their ability generate sufficient electric fields for effective pumping. We introduce an innovative approach utilizing covalent-organic framework membranes that enhance light absorption reduce charge recombination through vertical gradient protonation of imine linkages during acid-catalyzed liquid-liquid interfacial polymerization. This technique creates intralayer interlayer heterojunctions, facilitating hybridization establishing a robust built-in field under illumination. These improvements enable the achieve remarkable transport across extreme concentration gradients (2000:1), with rate approximately 3.2 × 10

Language: Английский

Citations

1