JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Qiao Liu,Bingshan Tao,Nong Xu,Qing Wang,Long Fan,Yinhua Wan
Two-dimensional (2D) MXene membranes have attracted significant attention for their high efficiency in molecule separation. In this study, an interlaminar in-situ growth strategy was employed to incorporate TpHz into the adjacent layer space between the Ti 3 C 2 T x nanosheets of the 2D Ti 3 C 2 T x membrane. In the typical synthesis process, due to the hydrophilic nature of Ti 3 C 2 T x , the aqueous phase monomer diffuses through the Ti 3 C 2 T x layers, reacts with the organic phase monomer in the top-surface and generate TpHz in-situ . Gradually, TpHz grows into the interlaminar space of the Ti 3 C 2 T x nanosheets and the interior of the membrane. Owing to the charge transfer interaction existing between the TpHz and Ti 3 C 2 T x nanosheets, the adjacent layer space between the Ti 3 C 2 T x nanosheets is broadened without compromising the structural stability of the composite membranes. Accordingly, the TpHz/Ti 3 C 2 T x composite membrane (TTCM) exhibit highly efficient molecule sieving properties and excellent structural stability, with a high pure water permeance of 986.5 L m −2 h −1 ·bar −1 and a rejection rate of over 95.0 % for anionic organic dyes. Additionally, the TpHz/Ti 3 C 2 T x layer, with the thickness of only 160 nm, in the TTCM could withstand 80 h of water and solution flushing at a flow rate of 40 L min −1 in cross-flow filtration tests, maintaining stable solution permeance of 448 L m −2 h −1 ·bar −1 and rejection rates of 95.3 % demonstrating its high structural stability and potential for expanding industrial application in molecule sieving processes.
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
·
2023
·
IF 4.7
Mide Luo,Yali Zhao,Yanying Wei,Haihui Wang
Construction of large-area two-dimensional (2D) nanosheet membranes for gas separation, particularly tubular membranes, is extremely challenging. Here, electrophoretic deposition technology was employed to construct large-area tubular 2D MXene membranes for H 2 /CO 2 gas separation, where the membrane with a single tube area of 25 cm 2 could be successfully manufactured in approximately 5 min under optimal process conditions. The membrane exhibited good H 2 /CO 2 separation performance with H 2 /CO 2 selectivity of 53.0 and hydrogen permeance of 133.8 GPU, exceeding the 2008 Robeson upper bound, and showed excellent stability in long-term test with water vapor evaluations for more than 350 h. Additionally, some engineering issues and operation parameters concerning the separation performance of H 2 /CO 2 in single-module and dual-module separators have been thoroughly investigated and analyzed. This work has taken an important step toward the industrialization of 2D MXene membranes and also provided significant guidance to other 2D material-based membranes in approaching practical applications.
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
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Yanna Wu,Mengmeng Jia,Shuming Li,Zong Lu,Yanying Wei,Haihui Wang
Lithium extraction from salt lake is important for carbon neutrality, while obtaining both high Li + /Mg 2+ selectivity and high water permeance is still challenging. The burgeoning two-dimensional (2D) material membranes in decade show enormous potential to solve above problem due to its highly designable lamellar structure. In this work, a kind of positively charged laminated membranes using MXene nanosheets as building blocks with decoration of poly (diallyl dimethyl ammonium chloride) (PDDA) were proposed. Benefiting from the well–intercalated PDDA between MXene nanosheets, the interlayer spacing between neighboring nanosheets was greater than 2 nm, which was conductive to enhance water permeance. Simultaneously, the introduction of PDDA endowed the membrane with positive charge, which exhibited sharply improved Li + /Mg 2+ selectivity by an order of magnitude due to enhanced Donnan effect. The prepared MXene/PDDA membrane with a modification mass ratio of 1:10 exhibited high Li + /Mg 2+ selectivity of 29.3 with MgCl 2 saline solution permeance of 9.8 L m −2 h −1 ·bar −1 and pure water permeance of 32.3 L m −2 h −1 ·bar −1 , which was promising for lithium extraction. Such membrane constructing concept could be expanded to other kinds of membranes based on 2D nanosheets for effective ion sieving.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 21
·2885
·
IF 5.3
Jie Yang,Shilin Zhu,Hongli Zhang
Two-dimensional (2D) nanomaterial-based membranes feature attractive properties for molecular separation and transport, which exhibit huge potential in various chemical processes. However, the low permeability and bio-fouling of the MXene membrane in water treatment become huge obstacles to its practical application. Herein, a highly permselective and anti-bacterial 2D nanofiltration membrane is fabricated by intercalating a polycation of polydiallyldimethylammonium chloride (PDDA) into the Ti3C2TxMXene laminar architecture through a facile and patternable electrostatic assembly strategy. As a result, the as-fabricated Ti3C2Tx/PDDA composite membrane exhibits higher water permeance up to 73.4 L m−2h−1with a rejection above 94.6% for MgCl2. The resultant membrane simultaneously possesses good resistance to swelling and long-term stability in water environments, even after 8 h. Additionally, the Ti3C2Tx/PDDA membrane also demonstrates a high flux recovery ratio of nearly 96.1% to bovine serum albumin proteins after being cleaned. More importantly, the current membrane shows excellent anti-adhesive and anti-microbial activity against Gram-negativeEscherichia coli(E. coli) and Gram-positiveStaphylococcus aureus(S. aureus), with inhibition rates of 90% and 95% againstE. coliandS. aureus, respectively. This holds great potential for the application of the polyelectrolyte-intercalated MXene membrane in serving as a promising platform to separate molecules and/or ions in an aquatic environment.Keywords:Ti3C2Tx;MXene membrane;nanofiltration;two-dimensional membrane;anti-biofouling;PDDA
研究领域:
材料科学
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环境科学
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生物学
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产品关联
DOI
PubMed
高影响因子
Frontiers of Chemical Science and Engineering
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2020
·Vol. 15
·期 4
·882-891
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IF 3.552
Fan Yiyi,Li Jinyong,Wang Saidi,Meng Xiuxia,Jin Yun,Yang Naitao,Meng Bo,Li Jiaquan,Liu Shaomin
Hydrogen fuel has been embraced as a potential long-term solution to the growing demand for clean energy. A membrane-assisted separation is promising in producing high-purity H 2 . Molecular sieving membranes (MSMs) are endowed with high gas selectivity and permeability because their well-defined micropores can facilitate molecular exclusion, diffusion, and adsorption. In this work, MXene nanosheets intercalated with Ni 2+ were assembled to form an MSM supported on Al 2 O 3 hollow fiber via a vacuum-assisted filtration and drying process. The prepared membranes showed excellent H 2 /CO 2 mixture separation performance at room temperature. Separation factor reached 615 with a hydrogen permeance of 8.35 × 10 −8 mol·m −2 ·s −1 ·Pa −1 . Compared with the original Ti 3 C 2 T x /Al 2 O 3 hollow fiber membranes, the permeation of hydrogen through the Ni 2+ -Ti 3 C 2 T x /Al 2 O 3 membrane was considerably increased, stemming from the strong interaction between the negatively charged MXene nanosheets and Ni 2+ . The interlayer spacing of MSMs was tuned by Ni 2+ . During 200-hour testing, the resultant membrane maintained an excellent gas separation without any substantial performance decline. Our results indicate that the Ni 2+ tailored Ti 3 C 2 T x /Al 2 O 3 hollow fiber membranes can inspire promising industrial applications.
研究领域:
材料科学
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能源工程
✓ 已验证
DOI
高影响因子
Journal of CO2 Utilization
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2024
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IF 7.2
Heming Deng,Haoshuang Gu
Two-dimensional membranes are considered the next generation separation membrane with great application potential due to their excellent separation performance, good mechanical strength and thermal stability compared with traditional membrane materials. In this work, the flexible NH 2 -UIO-66@MXene membrane was successfully prepared for gas separation by loading NH 2 -UIO-66 particles onto Ti 3 C 2 nanosheets based on an in-situ growth strategy. A LiF-HCl mixed solution was used as the etchant to obtain the Ti 3 C 2 nanosheets. The loading of NH 2 -UIO-66 particles can regulate the interlayer spacing of Ti 3 C 2 nanosheets, improving the specific surface area of Ti 3 C 2 and the adsorption capacity for specific gases. The -NH 2 group in NH 2 -UIO-66 enabled preferential adsorption of CO 2 over H 2 , and the CO 2 molecules adsorbed in the channel can even block the molecules passing through, increasing the resistance of CO 2 diffusion. As a result, the NH 2 -UIO-66@Ti 3 C 2 hybrid membrane realizes the selective separation of H 2 /CO 2 mixed gas, and the separation selectivity is as high as 155. The gas separation selectivity and permeation of the final prepared NH 2 -UIO-66@MXene were enhanced and exceeded the upper limit of Robeson upper bound (2017).
研究领域:
材料科学
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化学工程
✓ 已验证
DOI
高影响因子
ACS Applied Polymer Materials
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2024
·
IF 4.4
Zhonghua Lv,Xi Chen,Ling Yang,Mengting Li,Changjun Xia,Chunjia Luo,Min Chao,Luke Yan
We present a biomimetic switchable MXene membrane for water treatment inspired by chloride ion transmembrane transport. The MXene membrane was modified with poly(2-diethylaminoethyl methacrylate), resulting in increased hydrophilicity and enlarged channels. The membrane exhibited a permeability of 4.42 × 104 L m–2 h–1 bar–1, surpassing conventional MXene membranes. The membrane also separated Methylene Blue positively charged at pH = 12 and Amido Black 10B negatively charged at pH = 2 with separation efficiency above 98%, thanks to controllable channel size and adjustable electrostatic interactions in response to pH or CO2. This research offers valuable insights into the design of pH-responsive membranes with adjustable selectivity, representing a significant advancement in smart filtration with versatile applications.
研究领域:
材料科学
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环境工程
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生物仿生学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
·
IF 8.4
Ting Li,Siyuan Liu,Jianyong Yu,Leiming Guo,Faxue Li
Advanced 2D MXene membranes endowed with size-adjustable transport pathways are greatly desired for tailored separation scenarios. How to construct such membranes in a facile way remains challenging. Herein, we develop an innovative strategy to prepare the MXene-based membranes with stable and highly tunable transport pathways for multiple separation scenarios through sub-nm-confined synthesis. By simply soaking the pristine MXene membranes in the mixed solution of tannic acid (TA) and 3-aminopropyltriethoxysilane (APTES), the chemical reaction of TA and APTES occurred in the sub-nm-scaled interlayer channels of the MXene membranes, inducing the generation of TA-APTES nanoaggregates. The interlayer spacings of the membranes can be continuously regulated in the range of 13.9–17.1 Å, while the water permeances are designated as between 10.5 and 317 L/(m 2 h bar). Moreover, the membranes are capable of effectively rejecting 89.9 % of NaCl or 98.2 % of MgSO 4 or 100 % of dyes on demand. The developed strategy of sub-nm-confined synthesis makes the constructed membranes much more stable than previously reported ones and suitable to the high-efficient separation of dye/salt mixtures. The intercalated membranes outperform most of other nanofiltration membranes in separating either NaCl or MgSO 4 or dye/salt mixtures. This work paves a new and facile way to construct advanced 2D membranes with desired transport pathways for multiple separation scenarios.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Baochun Meng,Guozhen Liu,Yangyang Mao,Feng Liang,Gongping Liu,Wanqin Jin
Two-dimensional (2D) materials have been demonstrated as promising building blocks of designing high-performance membranes for molecular separation. Nevertheless, it is a big challenge to apply 2D-material membranes for water desalination . Herein, we proposed a new type of surface-charged MXene (SC-MXene) membrane for water desalination, which was facilely fabricated by laminar stacking of MXene nanosheets and subsequent surface-coating with polyelectrolyte layer. The morphology, physicochemical structure and surface property of the MXene materials and resulted membranes were observed by XPS , SEM, water contact angle test , AFM , IR and XPS . These results demonstrated that coating polyelectrolyte (PEI) successfully tuned the surface charge and enhanced the hydrophilicity without scarifying the laminar structure of MXene membrane. By utilizing the effects of electrostatic interaction and size-sieving, the resulting surface-charged MXene (SC-MXene) membrane exhibited high salt rejection and water permeance during either nanofiltration or forward osmosis process, showing great potential for water desalination.
研究领域:
材料科学
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环境工程
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Chao Feng,Kaiqin Ou,Zhipeng Zhang,Yongpeng Liu,Yunpeng Huang,Zicheng Wang,Yan Lv,Yue-E Miao,Yong Wang,Qianqian Lan,Tianxi Liu
MXenes are receiving growing attention in wastewater treatment , but the preparation of ultrathin MXene membranes with short water pathways on macroporous substrates for improving flux is challenging due to the deformation of the flexible MXene nanosheets . Herein, we demonstrate the fabrication of ultrathin MXene membranes by constructing an intermediate porous covalent organic framework (COF) layer. COF nanosheets are first vacuum filtrated on macroporous substrates to form a porous COF layer, followed by the vacuum deposition of MXene nanosheets to produce the dual-layered COF/MXene composite membranes . The COF layer provides a smooth surface with rich pores and good hydrophilicity for depositing MXene nanosheets, leading to the well-assembled MXene layer as thin as 8 nm. The ultrathin MXene layer and the porous COF layer enable the short water transport pathways, and the well-assembled MXene nanosheets guarantee the narrow interlayer nanochannels. Membranes thereby are endowed with high permeance of 563 L/(m 2 ·h·bar) and high rejection to congo red of 99.6%, outperforming other reported COF- or MXene-based membranes. This work suggests a facile construction strategy of ultrathin MXene-based composite membranes with high separation performances, which are highly desired in water treatment.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Mao Mu,Nigel Graham,Wenzheng Yu,Kening Sun,Xiyan Xu,Ting Liu
The unique layered structure and abundant 2D nanochannels of MXene membranes have demonstrated outstanding permeability, indicating their great potential in the field of water treatment . However, their unstable interlayer spacing and irregular layer structure have limited their ability to separate small molecular pollutants effectively. In this study, we successfully prepared composite MXene membranes with high rejection and low adsorption properties by exploiting the differences in the surface functional groups and chain lengths of dopamine (DA) and polyethylene glycol (PEG) through an optimal cross-linking approach. These composite membranes exhibited excellent stability in terms of interlayer spacing and mitigated the adverse effects of stacking defects. Compared to MXene membranes, the composite membranes achieved a 1.76-fold increase in dye rejection efficiency, reaching 98.7% at most, with an adsorption ratio of only 1.8%. Moreover, outstanding performances were also exhibited in pressure and concentration load tests. Furthermore, in the context of forward osmosis applications, the composite membranes demonstrated excellent Na + rejection of 99.9%. More importantly, these membranes showed no performance deterioration throughout 50 filtration cycles, with only a slight increase in permeance of 19.3% over a 38-day testing period. Thus, this work presents a novel solution for fabricating MXene composite membranes with low swelling, minimal defects, and high stability, enhancing its potential in the field of water and wastewater treatment .
研究领域:
材料科学
·
水处理工程
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环境科学
✓ 已验证
产品关联
DOI
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
危险品化学品经营许可证（带存储）