ACS Nano
·
2025
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IF 16
Shilong Li,Kecheng Guan,Dandan Zhou,Dong Zou,Jian Lu,Wenbo Jiang,Bin Chen,Jian Qiu,Lele Cui,Tianxiang Yu,Yuqing Sun,Zhi Xu,Wanqin Jin,Wenheng Jing
Two-dimensional (2D) material membranes have significant potential for selectively transporting molecules and ions, crucial for environmental and energy applications significantly. However, challenges such as complex pathways and instability due to weak interactions hinder their performance. This study takes 2D MXene (Ti3C2Tx) as a platform and proposes a lattice vacancy-anchored chemical etching method to perforate MXene nanosheets and produce acid cross-linkers simultaneously. The etching process involves H2O2 oxidation consuming Ti atoms from the lattice vacancies of MXene to create peroxo titanic acid (PTA), precisely generating nanopores in the nanosheets for additional transport pathways. At the same time, the produced PTA acts as a cross-linking agent that enhances the interaction between MXene nanosheets to form stabilized interlayer channels. This approach results in multilevel features in the MXene membrane, offering abundant vertical water channels and robust interlayer ion-sieving channels. Consequently, both permeability and selectivity improve nearly 10-fold compared to the pristine membrane, overcoming previous trade-offs. This strategy presents a precise and ingenious method for perforating 2D materials and constructing high-performance mass transport channels of 2D membranes at various levels, benefiting sustainable and highly efficient desalination processes.
研究领域:
材料科学
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环境工程
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化学工程
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产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Lingzhi Huang,Shiyun Chen,Li Ding,Haihui Wang
Two-dimensional (2D) nanofluidic channels have shown great potential for efficient ion separation due to the synergy of the charge microenvironment and confined 2D planar channels. However, current 2D channels mainly rely on postdecoration with ion-specific recognition molecules, while the regulation of the membrane structure and the role of the channel itself have been overlooked. Herein, we constructed two types of membranes to demonstrate the critical role of building units in 2D lamellar membranes. By tuning the lateral size of MXene nanosheets, we prepared a large-lateral-sized MXene membrane (LMM)(∼5.47 μm) and a small-lateral-sized MXene membrane (SMM)(∼524 nm) to systematically study the ion transport behavior. The results showed that the LMM exhibited preferential transport of monovalent ions (Li+, Na+, and K+) while impeding permeation of multivalent ions (Ca2+, Mg2+, and Al3+), contributing to the selectivity of Li+/Mg2+ ≈ 12. In contrast, the SMM allowed for the fast transport of all monovalent/divalent ions, leading to poor selectivity (e.g., Li+/Mg2+ ≈ 2.3), which could be attributed to the abundant nonselective defects in the SMM. Density functional theory calculations reveal that the weakest interaction between MXene and Li+ determines the selective transport of Li+ over other ions. This work highlights the importance of building defect-free 2D membranes for ion sieving using nondecorated 2D nanofluidic channels.
研究领域:
材料科学
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纳米流体学
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
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IF 9
Tao Yao,Mingyu Zhang,Zhijiang Sun,Fen Ran
Water flux and ion sieving capability are the primary indicators determining the separation performance of nanofiltration membranes. Increasing the effective contact area between the membrane surface and water without sacrificing the membrane's density is a practical way to improve water flow while preserving salt rejection. By integrating hydrophilic nanoparticles during the interfacial polymerization process, it is feasible to indirectly modify the surface morphology of the nanofiltration membrane, so efficiently managing the generation and structure of the polyamide selective layer. Here it is suggested a technique that includes adding produced hydrophilic nanoparticles in one dimension to the interfacial polymerization process to form the polyamide composite membrane through interfacial polymerization. The fabricated ultrathin composite membrane exhibits a water flux of 19.4 Lm -2 h −1 bar −1 and a salt (Na 2 SO 4 ) rejection rate exceeding 93 %. Furthermore, due to the modification of the added nanomaterials, they can participate in the interfacial polymerization process, resulting in enhanced stability during prolonged testing.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2017
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IF 3.359
Fuyin Ma,Zheng Li,Haogui Zhao,Yiyun Geng,Wei Zhou,Qingnuan Li,Lan Zhang
As a new carbon-based membrane material used for ionic and molecular sieving, the graphene oxide (GO) membrane also has potential application in radiochemical separation. In this work, the permeation performances of some typical metallic elements in high level-liquid waste (HLLW) through the ionic sieving 5-μm-thick GO membranes were investigated. It was found that the permeation rates of ions through GO membranes markedly decreased with the increase of hydrated ionic radii. Cs(I) and Sr(II) permeated through GO membranes quickly, whereas lanthanide ions and actinide ions infiltrated much more slowly, thus providing the feasibility of separation according to the difference of hydrated ionic radii. Moreover, the concentrations of initial metal ions and acidity in feed solutions also had influences on the permeation of ions through GO membranes, and higher initial metal ions and feed solution acidity were favorable to the removal of Cs(I) and Sr(II). The barrier separation test indicated that GO membranes had promising ability for the separation of Cs(I) and Sr(II) from lanthanide and actinide ions due to the difference of hydrated ion radius, and the separation factor of Cs(I)/U(VI) and Sr(II)/U(VI) would reach about 10 and 3 in single penetration. The presented results demonstrated that the membrane separation based on GO membrane would be a promising candidate for the removal of Cs(I) and Sr(II) from HLLW.
研究领域:
放射化学
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材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Yongtong Lei,Lijing Zhu,Jilong Xu,Shuan Liu,Zhixiang Zeng,Xiaocheng Li,Gang Wang
Metal organic framework (MOF) with fine pore structures, ultra-high porosity and large specific surface area can provide more water transport channels while achieving precise sieving of different sizes of ions, which is a promising material for high efficiency desalination. However, particle agglomeration, interface incompatibilities and interface defects severely restrict the performance of MOF-based membranes. It is still a challenge to construct MOF-based desalination membranes with both high water permeability and high ion sieving. Herein, the UiO-66-NH 2 based nanofiltration membrane was fabricated by in-situ growth of UiO-66-NH 2 on Nylon membrane and composed with polyamide (PA) layer by interfacial polymerization (IP). With 12 h solvothermal reaction, the UiO-66-NH 2 nanoparticles are found uniformly loaded on the Nylon substrate. Therefore, the water molecule transport channels provided by UiO-66-NH 2 nanoparticles reduce the transport resistance, which can improve the water permeability. More importantly, UiO-66-NH 2 nanoparticles are found to be involved in the IP process, which can reduce the interfacial defects and thus enhance the bonding force between the PA layer and base film. The synergistic effect of the UiO-66-NH 2 and PA layer improves the nanofiltration performance of the membrane with rejection rate of 92.97% for Na 2 SO 4 and the pure water permeance (PWP) of 11.55 L m −2 h −1 bar −1 . The N-UN12 @PA membrane also has excellent antifouling performance (flux recovery ratio (FRR) of 95.86%, reversible fouling ratio (Rr) of 33.93%, irreversible fouling ratio (Rir) of 4.14%). Unlike the mixed-matrix membrane (MMM) and polycrystalline MOF membrane, this strategy provides a promising method to prepare high-performance nanofiltration membrane for desalination.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
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IF 13.3
Xueyan Zhang,Xinxin Xing,Xudong Zhao,Jinhua Yang,Meihan Liu,Baosheng Liu,Xinli Gao,Hongliang Huang
Selective adsorption of lithium ion from aqueous media is one of important routes to solve the scarcity and high cost problems of this valuable resource. Crown ethers (CE) as classical Li-oriented molecules are commonly loaded in solid matrixes to construct adsorbents. However, unreasonable selection of matrixes easily leads to low loading efficiency and inadequate exposure of CE sites, resulting in unsatisfactory performances. Herein, we designed a novel crown ether-decorated metal–organic framework (MOF-808-12C4E), via grafting carboxybenzo 12-crown-4-ether (CB-12C4E) molecules in a highly porous MOF-808 platform. Based on the rich exchangeable sites, dense 12C4E units (1.47 mmol g −1 ) were successfully introduced in the Zr nodes of MOF-808. Thanks to the large ion diffusion channel and dense active sites, MOF-808-12C4E shows a high adsorption capacity (30.4 mg g −1 ) and very short adsorption equilibrium time (15 min). Selective adsorption of Li + ion over Na + , K + , Ca 2+ , and Mg 2+ ions was achieved, due to the higher suitability of Li + ion diameter with the size of 12C4E hole. Based on experimental characterizations and theoretical calculations, we confirm the crucial contribution of 12C4E units for the selective adsorption behavior of Li + ion. Thus, our work provides an efficient adsorbent for selectively capturing Li + ion, and meanwhile proves the promising potentials of porous MOFs for grafting active crown ethers.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Yunhuan Chen,Weier Wang,Xinyue Liu,Xiaoxiao Duan,Yongsheng Ren
Highly permselective and antifouling nanofiltration (NF) membranes are desirable materials for ion sieving. Integrating favorable properties through interfacial polymerization (IP) is challenging. Herein, nano-encapsulation of polyethyleneimine (PEI) is performed using a functional group pre-protection approach. By precisely controlling the release process of the nanocapsules during IP reaction to achieve in situ deep cross-linking of PEI. Nanocapsule-modulated IP (NMIP) strategy affects the morphology of polyamide network in several ways, with the Turing structure endowing the membrane with higher water permeance (15.1 L m -2 h −1 bar −1 ) and a narrowed pore size that enhances the ion-sieving properties (Cl - /SO 4 2- selectivity of 68.5). The nearly electroneutral separation layer shows low fouling rates and flux recoveries of up to 97.1 % in the treatment of charged organics and high stability under long-term high-loaded contamination conditions. This study unlocks new avenues for the precise, low-cost fabrication of high-performance ion-sieving materials.
研究领域:
材料科学
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环境工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Yuxiao Ran,Lang Liu,Yanqiong Bao
To address the challenges of salt interference and resource utilization difficulties in seawater desalination processes, there is an increasing demand for efficient separation of NaCl and Na₂SO₄. Inspired by the salt secretion mechanisms of mangrove ecosystems, we developed a cost-effective biomimetic system for salt separation and collection that synergistically integrates photothermal evaporation with ion-sieving processes and crystallization control mechanisms. This novel design achieves simultaneous separation and collection of NaCl at a single interface. The system demonstrates superior separation performance under high-salinity conditions, achieving a remarkable salt crystallization rate of 72 g m −2 h −1 in 20 wt% saline solution with a separation factor of 2.72 at a NaCl/Na₂SO₄ ratio of 3. The system maintained high-efficiency and stable operation during prolonged cycling experiments. By synergistically combining salt separation/collection with interfacial evaporation on a unified platform, this study presents an efficient and sustainable approach for salt fractionation that significantly advances the field of brine resource recovery.
研究领域:
环境科学
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材料科学
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水处理技术
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产品关联
DOI
高影响因子
ACS Nano
·
2020
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IF 14.588
Jiani Zhu,Lei Wang,Jin Wang,Fudi Wang,Mengtao Tian,Shuchang Zheng,Ning Shao,Lele Wang,Miaolu He
Two-dimensional (2D) membranes exhibit exceptional properties in molecular separation and transport, which reveals their potential use in various applications. However, ion sieving with 2D membranes is severely restrained due to intercalation-induced swelling. Here, we describe how to efficiently stabilize the lamellar architecture using Keggin Al13 polycations as pillars in a Ti3C2Tx membrane. More importantly, interlayer spacing can be easily adjusted with angstrom precision over a wide range (2.7–11.2 Å) to achieve selective and tunable ion sieving. A membrane with narrow d-spacing demonstrated enhanced selectivity for monovalent ions. When applied in a forward osmosis desalination process, this membrane exhibited high NaCl exclusion (99%) with a fast water flux (0.30 L m–2 h–1 bar–1). A membrane with wide d-spacing showed notable selectivity, which was dependent on the cation valence. When it was applied to acid recovery from iron-based industrial wastewater, the membrane showed good H+/Fe2+ selectivity, which makes it a promising substitute for traditional polymeric membranes. Thus, we introduce a possible route to construct 2D membranes with appropriate structures to satisfy different ion-sieving requirements in diverse environment-, resource-, and energy-related applications.
研究领域:
材料科学
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环境工程
·
分离技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Tianli Li,Wentao Liu,Yizhou Liu,Jian Wang,Hua Hao,Zhiyong Yu,Hanxing Liu
The paramount target in advancing high-efficiency lithium-sulfur (Li–S) batteries lies in hindering polysulfides shuttling and enhancing redox kinetics. Herein, the covalent organic frameworks (designated as TBCOF) are grafted in-situ on the surface of MXene to achieve MXene@TBCOF heterostructure at ambient temperature, modulating the kinetics behavior of ions owing to its unparalleled ionic sieving functionality. The resultant compound possesses a gradient (non-conductive/ conductive) electric field effect, well-defined porous architecture, and abundant sulfophilic/lithiophilic sites, enriching the chemical space of 0D-2D heterostructures. By harnessing the multiple-in-one characteristics of MXene@TBCOF heterostructure, the formed electron-bridge of integrated conductive MXene in heterostructures prohibits the accumulation of TBCOF and MXene, serving as a versatile accelerator for the polysulfides bidirectional evolution, as comprehensively evidenced by theoretical analysis and pouch cells. Therefore, the batteries equipped with MXene@TBCOF functional separator acquire a brilliant cyclicity at a current density of 1C (with capacity decaying rate of merely 0.0191 % per cycle) during 1500 cycles. Impressively, even with a sulfur loading up to 9.31 mg cm −2 , the batteries exhibit a superior area capacity of 7.14 mAh cm −2 after enduring 90 cycles. This work proposes an innovative one-step synthesis strategy to construct catalytic “ion-sieving” heterostructure via covalent coupling for practical Li-S batteries.
研究领域:
材料科学
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电化学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Jingyan Hu,Yingyao He,Jianqiang Wang,Jiahuan Liu,Fu Liu
It is a great challenge to achieve precise ion sieving by polyamide nanofiltration membrane separation. The key for solving this problem is the fine control of polyamide nanofiltration membrane pore structure. In this study, we propose a PIP pre-diffusion and TMC control release method to fabricate polyamide nanofiltration membrane. The PIP pre-diffusion and TMC control release offered a uniform PIP distribution and adjustable monomer ratio, therefore relatively narrowing pore size distribution. M-60s membrane has 91.5 % of pores smaller than the diameter of hydrated magnesium ions (0.86 nm) and 83.6 % smaller than that of sulfate ions (0.76 nm). In comparison, only 62.7 % and 45.3 % of the pores in the CIP membrane are smaller than these hydrated diameters. Therefore, the membrane exhibited high ions selectivity including Li + /Mg 2+ and Cl − /SO 4 2− of 44.6 and 256.4 respectively. The strategy proposed in the current study might offer a new approach for fabricating nanofiltration membrane with high ions selectivity.
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2023
·
IF 17.1
Hai Xu,Ruanye Zhang,Derong Luo,Jiuqing Wang,Hui Dou,Xiaogang Zhang,Gengzhi Sun
The high dissolution of polyiodides and unstable interface at the anode/electrolyte severely restrict the practical applications of rechargeable aqueous Zn-iodine batteries. Herein, we develop a zinc ion-based montmorillonite (ZMT) electrolyte membrane for synergizing ion sieve and solvation regulation to achieve highly stable Zn-iodine batteries. The rich M–O band and special cation-selective transport channel in ZMT locally tailor the solvation sheath around Zn2+ and therefore achieve high transference number (t+ = 0.72), benefiting for uniform and reversible deposition/stripping of Zn. Meanwhile, the mechanisms for three-step polyiodide generation and shuttle-induced Zn corrosion are highlighted by in situ characterization techniques. It is confirmed that the strong chemical adsorption between O atoms in ZMT and polyiodides species is the key to effectively inhibit the shuffle effect and side reactions. Consequently, the ZMT-based Zn-iodine battery delivers a high capacity of 0.45 mAh cm–2 at 1 mA cm–2 with a much improved Coulombic efficiency of 99.5% and outstanding capacity retention of 95% after 13 500 cycles at 10 mA cm–2. Moreover, owing to its high durability and chemical inertness and structural stability, ZMT-based electrolyte membranes can be recycled and applied in double-sided pouch cells, delivering a high areal capacity of 2.4 mAh cm–2 at 1 mA cm–2.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
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