Advanced Membranes最新文献_第4页

Laponite nanosheets modified polyethersulfone membranes with enhanced high-pressure resistance for stable separation 拉脱石纳米片改性聚醚砜膜具有增强的抗高压性能，可实现稳定的分离

IF 9.5

Advanced Membranes

Pub Date : 2025-12-10 DOI: 10.1016/j.advmem.2025.100206

Zhijiang Sun , Xianya Wu , Yumeng Wang , Yu Jiang , Tao Yao , Shengtao Niu , Jianzhou Niu , Dahui Wang , Zehua Yin , Fen Ran

Many high-performance ultrafiltration membranes have been developed to address pollutant removal in complex water environments. However, the permeability-selectivity trade-off and inherent instability issues remain unresolved. In this study, a dense ultrafiltration membrane modified with laponite nanosheets is fabricated for selective separation and purification. The laponite nanosheets exhibit excellent compatibility with the polyethersulfone matrix, owing to their well-defined dimensions, distinctive physicochemical properties, and the dispersing role of polyvinylpyrrolidone, resulting in a membrane with synergistic performance characteristics. The modified membrane demonstrates a high pure water flux (106.3 L m⁻² h⁻¹), near-complete rejection of Congo red (>99.9 %), and high rejection rate of Methylene blue (89.8 %). Within a wider pressure range (0.1–3.0 MPa), the permeation flux maintains a linear relationship with increasing pressure, while the rejection rate for Congo red is nearly 100 %. In addition, under a high pressure of 2.0 MPa, laponite nanosheets-modified polyethersulfone membrane exhibits high stability and good separation performance under high-pressure conditions. These attributes significantly enhance separation precision and operational reliability in dye wastewater systems, indicating strong potential for practical application.

为了解决复杂水环境中污染物的去除问题，开发了许多高性能超滤膜。然而，渗透选择性的权衡和固有的不稳定性问题仍然没有解决。在本研究中，制备了一种由拉脱土纳米片修饰的致密超滤膜，用于选择性分离和纯化。由于其明确的尺寸，独特的物理化学性质以及聚乙烯吡咯烷酮的分散作用，拉脱土纳米片与聚醚砜基质具有良好的相容性，从而形成具有协同性能特征的膜。改性后的膜具有较高的纯水通量（106.3 L m−2 h−1），对刚果红的去除率接近完全（99.9%），对亚甲基蓝的去除率较高（89.8%）。在较宽的压力范围内（0.1 ~ 3.0 MPa），渗透通量随压力的增加保持线性关系，刚果红的截留率接近100%。此外，在2.0 MPa高压下，拉脱土纳米片改性聚醚砜膜在高压条件下表现出高稳定性和良好的分离性能。这些特性显著提高了染料废水系统的分离精度和运行可靠性，显示出强大的实际应用潜力。

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引用次数: 0

Solvent desalination nanofiltration (SDNF) membranes with rigid microporous network 具有刚性微孔网络的溶剂脱盐纳滤膜

IF 9.5

Advanced Membranes

Pub Date : 2025-11-28 DOI: 10.1016/j.advmem.2025.100203

Feng-Ying Zhang , Jiang-Shan Xing , Ming-Jian Tang , Ming-Shu Li , Wai-Fen Yong , Xue-Li Cao , Mei-Ling Liu , Shi-Peng Sun , Weihong Xing

Solvent-resistant nanofiltration (SRNF) for desalination from organic solvent/water systems is crucial in electronics manufacturing. However, the development of high-performance membranes is persistently challenged by the trade-off between permeability and selectivity, along with issues of irreversible compaction and inadequate control over the interfacial polymerization (IP) process. To overcome these challenges, we engineered a high-performance solvent desalination nanofiltration (SDNF) membrane through the construction of a carboxylated microporous polymer (cPIM-1)/polyimide (PI) composite substrate, interfacial self-assembly of a cucurbit[6]uril-based host-guest selective layer, and a solvent-phase amination for enhanced rejection. The rigid skeleton of cPIM-1 significantly enhanced the compressive resistance of the composite membrane, resulting in a 10 % reduction in flux decline. The abundant surface carboxyl groups promoted the adsorption of aqueous amine monomers through electrostatic interactions, enabling precise control over the IP process. This resulted in a selective layer with smaller pores (r_p = 0.16 nm) and high negative surface charge (Zeta potential = −9.54 mV). The membrane demonstrated a MgSO₄ rejection rate of 91.3 % in a 30 wt% N-methylpyrrolidone (NMP)/H₂O solution, representing an approximately 30 % improvement over the PI membrane without cPIM-1 doping. This study introduces a novel material design strategy for high-performance SDNF membranes, offering significant potential for the recovery of high-value components from electronic industrial waste streams.

耐溶剂纳滤（SRNF）用于有机溶剂/水系统的脱盐在电子制造中至关重要。然而，高性能膜的开发一直受到渗透性和选择性之间权衡的挑战，以及不可逆压实和对界面聚合（IP）过程控制不足的问题。为了克服这些挑战，我们设计了一种高性能的溶剂脱盐纳滤（SDNF）膜，通过构建羧基化微孔聚合物(cpm -1)/聚酰亚胺（PI）复合衬底，界面自组装葫芦[6]uril基主客选择层，以及溶剂相胺化来增强截除率。cPIM-1的刚性骨架显著增强了复合膜的抗压能力，使通量下降幅度降低了10%。丰富的表面羧基通过静电相互作用促进了水胺单体的吸附，从而能够精确控制IP过程。这导致了具有较小孔隙（rp = 0.16 nm）和高表面负电荷（Zeta电位= - 9.54 mV）的选择性层。在30 wt% n -甲基吡啶酮(NMP)/H2O溶液中，该膜的MgSO4截留率为91.3%，比未掺杂cPIM-1的PI膜提高了约30%。本研究介绍了一种高性能SDNF膜的新型材料设计策略，为从电子工业废物流中回收高价值组件提供了巨大的潜力。

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引用次数: 0

Molecular fractionation with poly(ether ether ketone) hollow fibers 聚醚醚酮中空纤维的分子分馏

IF 9.5

Advanced Membranes

Pub Date : 2025-11-27 DOI: 10.1016/j.advmem.2025.100193

Banan Alhazmi , Lakshmeesha Upadhyaya , Shanshan Hong , Gergo Ignacz , Radosław Górecki , Maik Tepper , Hannah Roth , Matthias Wessling , Gyorgy Szekely , Suzana P. Nunes

Sustainable and efficient separation technologies are essential for minimizing the environmental impact of the chemical and pharmaceutical industries. Membranes with stability in solvents and precise molecular separation are needed. We report poly(ether ether ketone) (PEEK) membranes engineered for the separation of multicomponent mixtures of active pharmaceutical ingredients (API) of different size and polarity. PEEK is highly stable in solvents typically used in the industry even without crosslinking, but the insolubility is a challenge for solution processing and fibers fabrication. We spun PEEK fibers from solutions in methanesulfonic acid through acid-resistant spinnerets designed and fabricated by stereolithography 3D printing, which are not susceptible to corrosion. Membranes with acetonitrile permeance of around 3 L m⁻² h⁻¹ bar⁻¹ and over 90 % rejection of molecules with 120 g mol⁻¹ were obtained. We also innovate in providing a comprehensive performance characterization that predicts the efficiency in separating molecule pairs of different size and chemistry, a procedure more representative of industrial applications instead of the commonly used screening with dye molecules, which can be prone to adsorption artefacts. We discuss the transport mechanisms of organic solvents through the membranes providing a comprehensive analysis of experimental results to evaluate the contributions of pore flow, permeant-polymer affinity and friction to the transport.

可持续和高效的分离技术对于尽量减少化学和制药工业对环境的影响至关重要。需要在溶剂中具有稳定性和精确分子分离的膜。我们报道了聚醚醚酮（PEEK）膜用于分离不同大小和极性的活性药物成分（API）的多组分混合物。PEEK在工业中通常使用的溶剂中非常稳定，即使没有交联，但不溶解性是溶液加工和纤维制造的一个挑战。我们通过立体光刻3D打印设计和制造的耐酸喷丝器，从甲基磺酸溶液中纺出PEEK纤维，这种喷丝器不易受腐蚀。该膜的乙腈渗透率约为3 L m−2 h−1 bar−1，对120 g mol−1的分子的去除率超过90%。我们还在提供全面的性能表征方面进行了创新，预测了分离不同大小和化学性质的分子对的效率，这是一种更能代表工业应用的程序，而不是常用的染料分子筛选，因为染料分子容易吸附伪影。我们讨论了有机溶剂通过膜的传输机制，并对实验结果进行了综合分析，以评估孔隙流动、渗透聚合物亲和和摩擦对传输的贡献。

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引用次数: 0

Influence of filler microstructure on propylene/propane separation in calixarene-based mixed matrix membranes 填料微观结构对杯芳烃基混合基质膜中丙烯/丙烷分离的影响

IF 9.5

Advanced Membranes

Pub Date : 2025-11-25 DOI: 10.1016/j.advmem.2025.100192

Xiumei Geng , Ruiying Xie , Xinxin Sun , Xiang Zhang , Xuerui Wang , Roberto Castro Muñoz , Meixia Shan , Yatao Zhang

The pure organic nature and solubility of calixarenes in organic solvents position them as prospective fillers for mixed matrix membranes (MMMs). This investigation incorporated two calixarene materials, C-propylpyrogallol[4]arene (PgC₃) and sulfonato-calix[6]arene (SCA6), into a 6FDA-TMPDA matrix to fabricate MMMs targeting C₃H₆/C₃H₈ separation. The separation performance of two calixarenes based MMMs were investigated at various filler loadings. SCA6 was found to be a more suitable filler for 6FDA-TMPDA as its abundant -OH and -HSO₃ functional groups, which strengthened filler-matrix interfacial compatibility. The membrane containing 1 wt% SCA6 in 6FDA-TMPDA exhibited optimal performance, attaining the C₃H₆ permeability of 69.3 Barrer and an ideal selectivity of 17.3, surpassing the polymeric upper limit. The PgC₃/6FDA-TMPDA MMMs also displayed a marked selectivity enhancement from 7.1 to 18.9. Both 1 wt% SCA6/6FDA-TMPDA and 5 wt% PgC₃/6FDA-TMPDA membranes demonstrated long-term stability up to 20 days. The excellent separation performance and operational stability of these MMMs offer a promising alternative for efficient C₃H₆/C₃H₈ separation.

杯芳烃的纯有机性质和在有机溶剂中的溶解度使其成为混合基质膜（MMMs）的潜在填料。本研究将两种杯芳烃材料，c -丙基邻苯三酚[6]芳烃（PgC3）和磺化杯芳烃[6]芳烃（SCA6）加入6FDA-TMPDA基质中，制备了针对C3H6/C3H8分离的MMMs。研究了两种杯芳烃基MMMs在不同填料用量下的分离性能。sc6具有丰富的-OH和-HSO3官能团，增强了填料与基质的界面相容性，是6FDA-TMPDA更合适的填料。6FDA-TMPDA中含有1 wt% SCA6的膜表现出最佳性能，C3H6的渗透率为69.3 Barrer，理想选择性为17.3，超过了聚合物的上限。PgC3/6FDA-TMPDA MMMs的选择性也从7.1提高到18.9。1wt % SCA6/6FDA-TMPDA和5wt % PgC3/6FDA-TMPDA膜均表现出长达20天的长期稳定性。优异的分离性能和操作稳定性为高效分离C3H6/C3H8提供了良好的选择。

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引用次数: 0

Mono-/monovalent ions separation through an electro-nanofiltration 通过电纳滤分离单/单价离子

IF 9.5

Advanced Membranes

Pub Date : 2025-11-25 DOI: 10.1016/j.advmem.2025.100189

Yuwei Wang , Boyang Hui , Yanhong Ji , Jinjin Liu , Hong Wang , Benqiao He

The separation of mono-/monovalent ions posed a long-standing challenge due to nearly identical physicochemical properties. To address the challenge, an electro-nanofiltration (ENF) strategy was proposed to separate K⁺/Li⁺ with the assistance of multivalent cations. Experimental results demonstrated that an acceptable K⁺/Li⁺ separation factor was achieved under the synergistic effect of multivalent cations and electric field (EF). Through an external EF, the multivalent cations were accumulated on the membrane surface to enhance the positive charge density and created a strong near-surface EF. Under the synergistic effects of the near-surface EF and the external EF, low-hydration-energy hydrated ion (K⁺·nH₂O) underwent preferential dehydration. The separation could occur between hydrated (Li⁺·nH₂O) and dehydrated (K⁺) ions, resulting in a S_K,Li value of 3.2. Meanwhile, the ENF system exhibited good stability. The difference of activation energy (ΔEa) of transport process between K⁺ and Li⁺ increased significantly from −0.4 kJ mol⁻¹ under NF to 8.0 kJ mol⁻¹ under ENF, which was believed to be the kinetic reason for achieving K⁺/Li⁺ separation. Additionally, the separation of K⁺/Na⁺ or Na⁺/Li⁺ systems was achieved. Compared with existing mono-/monovalent ions separation strategies, the ENF strategy offered enhanced scalability and provided new insights into selective monovalent ion separation.

由于几乎相同的物理化学性质，单/单价离子的分离是一个长期的挑战。为了解决这一挑战，提出了一种电纳滤（ENF）策略，在多价阳离子的帮助下分离K+/Li+。实验结果表明，在多价阳离子和电场（EF）的协同作用下，获得了可接受的K+/Li+分离因子。通过外电效应，多价阳离子在膜表面聚集，增强了正电荷密度，形成了强的近表面电效应。在近表面电场和外部电场的协同作用下，低水合能水合离子（K+·nH2O）优先脱水。水合离子（Li+·nH2O）与脱水离子（K+）可发生分离，SK、Li值为3.2。同时，ENF体系具有良好的稳定性。K+和Li+输运过程的活化能差（ΔEa）从NF条件下的−0.4 kJ mol−1显著增大到ENF条件下的8.0 kJ mol−1，认为这是K+/Li+分离的动力学原因。此外，还实现了K+/Na+或Na+/Li+体系的分离。与现有的单/单价离子分离策略相比，ENF策略具有更强的可扩展性，并为选择性单价离子分离提供了新的见解。

{"title":"Mono-/monovalent ions separation through an electro-nanofiltration","authors":"Yuwei Wang , Boyang Hui , Yanhong Ji , Jinjin Liu , Hong Wang , Benqiao He","doi":"10.1016/j.advmem.2025.100189","DOIUrl":"10.1016/j.advmem.2025.100189","url":null,"abstract":"<div><div>The separation of mono-/monovalent ions posed a long-standing challenge due to nearly identical physicochemical properties. To address the challenge, an electro-nanofiltration (ENF) strategy was proposed to separate K<sup>+</sup>/Li<sup>+</sup> with the assistance of multivalent cations. Experimental results demonstrated that an acceptable K<sup>+</sup>/Li<sup>+</sup> separation factor was achieved under the synergistic effect of multivalent cations and electric field (EF). Through an external EF, the multivalent cations were accumulated on the membrane surface to enhance the positive charge density and created a strong near-surface EF. Under the synergistic effects of the near-surface EF and the external EF, low-hydration-energy hydrated ion (K<sup>+</sup>·nH<sub>2</sub>O) underwent preferential dehydration. The separation could occur between hydrated (Li<sup>+</sup>·nH<sub>2</sub>O) and dehydrated (K<sup>+</sup>) ions, resulting in a <em>S</em><sub>K,Li</sub> value of 3.2. Meanwhile, the ENF system exhibited good stability. The difference of activation energy (Δ<em>E</em>a) of transport process between K<sup>+</sup> and Li<sup>+</sup> increased significantly from −0.4 kJ mol<sup>−1</sup> under NF to 8.0 kJ mol<sup>−1</sup> under ENF, which was believed to be the kinetic reason for achieving K<sup>+</sup>/Li<sup>+</sup> separation. Additionally, the separation of K<sup>+</sup>/Na<sup>+</sup> or Na<sup>+</sup>/Li<sup>+</sup> systems was achieved. Compared with existing mono-/monovalent ions separation strategies, the ENF strategy offered enhanced scalability and provided new insights into selective monovalent ion separation.</div></div>","PeriodicalId":100033,"journal":{"name":"Advanced Membranes","volume":"7 ","pages":"Article 100189"},"PeriodicalIF":9.5,"publicationDate":"2025-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145748832","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Confined conversion of hydrogen-bonded organic framework into carbon molecular sieve-interlocked-substrate membrane for efficient CO2/CH4 separation 氢键有机框架转化为碳分子筛-联锁-底物膜的有效CO2/CH4分离

IF 9.5

Advanced Membranes

Pub Date : 2025-11-24 DOI: 10.1016/j.advmem.2025.100191

Chunchen Liu, Caiyan Zhang, Baolei Huang, Xinlei Yang, Hailing Guo, Daofeng Sun, Zixi Kang, Lili Fan

Carbon molecular sieve (CMS) membranes, derived from the crystalline porous and solution-processed hydrogen-bonded organic frameworks (HOFs), possess narrow pore size distributions for efficient gas molecular sieving. However, the small monomer molecules of HOF precursors (unlike polymer chains) can more easily infiltrate the porous α-Al₂O₃ substrates. Their conversion to CMS would lead to increased mass transfer resistance and reduced gas permeation. In this work, we turn this necessity into an advantage by fabricating CMS-interlocked-substrate membranes. This is achieved by infiltrating and confining a HOF-8 precursor within the surface voids of the substrate, followed by its subsequent conversion into CMS to serve as the selective layer. The derived CMS layers, with a thickness of ∼14.2 μm, are tightly interlocked with the substrates, as observed via scanning electron microscopy and energy-dispersive spectrometry. Consequently, the optimal CMS-interlocked-substrate membranes inherit the pore characteristics of their ordered porous precursors, featuring a narrower pore size distribution with a significant proportion of 3–4 Å ultramicropores, which yield an exceptional CO₂/CH₄ selectivity of 254.6. By eliminating the mass transfer resistance of continuous surface CMS layer, the membranes exhibit an enhanced CO₂ permeance of 137.3 GPU, surpassing our previous results of 47.6 GPU. Moreover, the membranes maintain stable separation in long-term permeation test and after surface sanding. These findings offer new perspectives on the fabrication of advanced CMS membranes.

碳分子筛（CMS）膜是由晶体多孔和溶液处理的氢键有机骨架（HOFs）演变而来的，具有狭窄的孔径分布，可用于高效的气体分子筛分。然而，HOF前体的小单体分子（不像聚合物链）更容易渗透到多孔的α-Al2O3底物中。它们转化为CMS将导致传质阻力增加和气体渗透率降低。在这项工作中，我们通过制造cms互锁基板膜将这种必要性转化为优势。这是通过渗透并将HOF-8前驱体限制在衬底的表面空隙中，随后将其转化为CMS作为选择层来实现的。通过扫描电子显微镜和能量色散光谱观察到，导出的厚度为~ 14.2 μm的CMS层与衬底紧密互锁。因此，最佳的cms -联锁底物膜继承了其有序多孔前体的孔隙特征，具有更窄的孔径分布和3-4 Å超微孔的显著比例，其CO2/CH4选择性为254.6。通过消除连续表面CMS层的传质阻力，膜的CO2透过率提高了137.3 GPU，超过了我们之前的47.6 GPU。在长期渗透试验和表面磨砂后，膜保持稳定的分离。这些发现为先进CMS膜的制备提供了新的视角。

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引用次数: 0

Recent progress in microporous membrane reactors for catalytic conversion CO2 into value-added chemicals 催化CO2转化为增值化学品的微孔膜反应器研究进展

IF 9.5

Advanced Membranes

Pub Date : 2025-11-24 DOI: 10.1016/j.advmem.2025.100190

Zhangjun Dai , Pei Nian , Longtian Cao , Xiaolong Wang , Xinhua Gao , Wenlan Ji , Yibin Wei

Catalytic conversion of CO₂ into high value-added chemicals offers an attractive route to address a range of climate issues caused by excessive CO₂ emission. However, the chemical inertness of CO₂ generally leads to unsatisfied CO₂ conversion and product selectivity. Catalytic membrane reactors (CMRs) have been considered promising to break the thermodynamic equilibrium of CO₂ catalytic reactions. This review firstly provides an overview of chemical reactions utilizing CO₂ and the classification of potential CO₂-derived chemical products. Then, the fundamentals of catalytic CO₂ conversion and the analysis of opportunities and difficulties of such reactions are presented. The advances of microporous membrane-based CMRs are deeply discussed regarding the membrane materials, applications for common chemical synthesis and reactor designs. Finally, the current achievements and future outlook in microporous membrane reactors (MMRs) for CO₂ catalytic conversion are summarized.

二氧化碳催化转化为高附加值化学品为解决二氧化碳过量排放引起的一系列气候问题提供了一条有吸引力的途径。然而，CO2的化学惰性通常导致CO2转化率和产物选择性不理想。催化膜反应器（CMRs）被认为有希望打破CO2催化反应的热力学平衡。本文首先综述了利用二氧化碳的化学反应以及潜在的二氧化碳衍生化学产品的分类。然后，介绍了催化CO2转化的基本原理，分析了催化CO2转化的机遇和困难。从膜材料、在化学合成中的应用和反应器设计等方面对微孔膜基cmr的研究进展进行了深入讨论。最后，对CO2催化转化微孔膜反应器（MMRs）的研究现状和发展前景进行了总结。

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引用次数: 0

Hydrazone-linked covalent organic frameworks for membrane separation 膜分离用腙连接共价有机框架

IF 9.5

Advanced Membranes

Pub Date : 2025-11-06 DOI: 10.1016/j.advmem.2025.100188

Jingsi Yuan , Keke Liu , Yunqiu Zhou , Penglin Cheng , Binyu Zhou , Xueli Cao , Miaomiao Tian , Shi-Peng Sun , Yatao Zhang , Junyong Zhu

Covalent organic frameworks (COFs), which are porous crystalline materials built using reticular and dynamic covalent chemistry, are attracting significant interest in advanced membrane separations. Their appeal stems from their higher mass transport efficiency and superior precision sieving, enabled by their ordered and modifiable pore channels, high porosity, and designable structure. Hydrazone-linked COFs, a subclass of Schiff base COFs, have emerged as promising membrane materials due to their large surface area, structural flexibility, and abundant heteroatomic sites. The versatility of their structure allows for precise tuning of pore size, architecture, and functionality by selecting specific building blocks or through post-modification, enabling the development of customized membranes for targeted separations. This review provides a comprehensive examination of the synthesis methods and applications of hydrazone-linked COF-based membranes, highlighting how their chemical stability, pore characteristics, and heteroatomic functionalities govern their performance. We analyze various fabrication techniques—including mixing, interfacial polymerization, covalent nanosheet stacking, and in situ growth—and discuss their impact on membrane performance. The applications in gas separation, water treatment, membrane catalysis, and energy storage are systematically evaluated, with a comparative analysis against conventional membrane materials. Finally, we identify persistent challenges related to scalability and long-term stability and outline future research directions to facilitate the practical implementation of these advanced membranes.

共价有机框架（COFs）是一种利用网状和动态共价化学构建的多孔晶体材料，在先进的膜分离领域引起了人们的极大兴趣。它们的吸引力来自于它们更高的质量传输效率和卓越的精确筛分，这是由于它们有序和可修改的孔隙通道、高孔隙率和可设计的结构。作为希夫碱COFs的一个亚类，腙连接COFs因其大表面积、结构柔韧性和丰富的杂原子位点而成为一种很有前途的膜材料。其结构的多功能性允许通过选择特定的构建块或通过后期修改来精确调整孔径，结构和功能，从而开发针对目标分离的定制膜。本文综述了腙连接cof基膜的合成方法和应用，重点介绍了它们的化学稳定性、孔隙特性和杂原子功能如何影响它们的性能。我们分析了各种制备技术，包括混合、界面聚合、共价纳米片堆叠和原位生长，并讨论了它们对膜性能的影响。系统评价了其在气体分离、水处理、膜催化、储能等方面的应用，并与传统膜材料进行了对比分析。最后，我们确定了与可扩展性和长期稳定性相关的持续挑战，并概述了未来的研究方向，以促进这些先进膜的实际实施。

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引用次数: 0

A novel homogeneous amphipathic PTFE/β-FeOOH nanofiber membrane for emulsion separation and photocatalytic degradation in harsh environments 一种新型均相两亲性PTFE/β-FeOOH纳米纤维膜，用于恶劣环境下的乳液分离和光催化降解

IF 9.5

Advanced Membranes

Pub Date : 2025-11-05 DOI: 10.1016/j.advmem.2025.100187

Fan Liu , Xin Wang , Jun Wu , Hongbo Yang , Baolong Li , Zihui Dong , Xutong Han , Xiaolei Li , Qinglin Huang

The efficient separation of emulsion and the simultaneous degradation of organic pollutants remain critical challenges in wastewater treatment, particularly under harsh environments. In this work, a multifunctional Polytetrafluoroethylene (PTFE)/β-FeOOH (beta-iron oxyhydroxide) nanofiber membrane was successfully fabricated via electrospinning combined with in situ mineralization. The membrane exhibited superamphiphilicity in air, underwater superoleophobicity, and superhydrophobicity in oil, with tunable surface wettability. Uniformly anchored β-FeOOH nanorods increased surface roughness and hydrophilicity while providing abundant catalytic sites, enabling synergistic oil–water emulsion separation and photo-Fenton degradation. At a low operating pressure of 0.2 bar, high permeation fluxes of 2713.29 and 2108.37 L·m⁻²·h⁻¹ were achieved for O/W (oil in water) and W/O(water in oil) emulsions, with separation efficiencies up to 99.90 %. The membrane maintained excellent chemical stability after 10 separation–regeneration cycles under pH 1 and 30 wt% NaOH conditions, retaining fluxes of 1948.47 and 2150.53 L·m⁻²·h⁻¹ with efficiencies of 99.38 % and 99.62 %, respectively. Additionally, methylene blue (MB) and rhodamine B (Rh B) removal rates remained above 98 % after five photo-Fenton cycles, and the flux recovery rate reached 97.88 %. These results demonstrate superior chemical resistance, antifouling properties, and long-term durability. Therefore, the proposed PTFE/β-FeOOH nanofiber membrane offers a promising strategy for efficient emulsion separation and organic pollutant purification in harsh environments.

乳化液的有效分离和有机污染物的同时降解仍然是废水处理的关键挑战，特别是在恶劣环境下。本文采用静电纺丝与原位矿化相结合的方法制备了多功能聚四氟乙烯(PTFE)/β-羟基氧化铁（β-FeOOH）纳米纤维膜。该膜在空气中表现出超两亲性，在水中表现出超疏油性，在油中表现出超疏水性，表面润湿性可调。均匀锚定的β-FeOOH纳米棒提高了表面粗糙度和亲水性，同时提供了丰富的催化位点，实现了油水乳液的协同分离和光- fenton降解。在0.2 bar的低操作压力下，O/W（油中油）和W/O（油中水）乳剂的渗透通量分别为2713.29和2108.37 L·m⁻²·h⁻¹，分离效率高达99.90%。在pH值为1和NaOH浓度为30 wt%的条件下，经过10次分离-再生循环后，膜保持了良好的化学稳定性，其通量为1948.47和2150.53 L·m⁻²·h⁻¹，效率分别为99.38%和99.62%。经过5次光- fenton循环后，亚甲基蓝（MB）和罗丹明B （Rh B）的去除率保持在98%以上，通量回收率达到97.88%。这些结果显示出优异的耐化学性，防污性能和长期耐久性。因此，所提出的PTFE/β-FeOOH纳米纤维膜为在恶劣环境下高效分离乳液和净化有机污染物提供了一种很有前景的策略。

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引用次数: 0

Ultra-stable Ni-overdoped yttria-stabilized zirconia oxygen separation membranes for methane partial oxidation 甲烷部分氧化用超稳定镍掺杂钇稳定氧化锆氧分离膜

IF 9.5

Advanced Membranes

Pub Date : 2025-11-03 DOI: 10.1016/j.advmem.2025.100186

Yi Gao , Tengpeng Wang , Fangsheng Liu , Dongjie Fan , Xiaoyu Xie , Zhengmao Ye , Dehua Dong , Huanting Wang , Zongping Shao

Ceramic oxygen separation membranes have advantages over cryogenic distillation and pressure swing adsorption in terms of oxygen production. However, the application of ceramic membranes is restricted by membrane stability issues at high operation temperatures. This study develops ultra-stable oxygen separation membranes through the over-doping of Ni into yttrium-doped zirconia (NYSZ). The Ni doping amount reaches 18.1 mol%, and Ni dissolution substantially increases the electronic conductivity of the yttrium-doped zirconia membranes under both oxidizing and reducing atmospheres, which is as high as 0.96 S cm⁻¹. Accordingly, high oxygen permeation rates of up to 1.68 mL min⁻¹ cm⁻² at 800 °C were achieved, which are comparable with those of conventional perovskite membranes (3.53 mL min⁻¹ cm⁻²). The ultra-stable NYSZ membranes were confirmed with stable electrochemical reforming of methane for 310 h. Therefore, the robust NYSZ membranes demonstrate great potential in practical applications.

在制氧方面，陶瓷氧分离膜具有低温蒸馏和变压吸附的优点。然而，陶瓷膜的应用受到高温下膜稳定性问题的限制。本研究通过在掺钇氧化锆（NYSZ）中过量掺杂Ni来制备超稳定的氧分离膜。Ni掺杂量达到18.1 mol%，在氧化和还原气氛下，Ni的溶解均显著提高了钇掺杂氧化锆膜的电导率，最高可达0.96 S cm−1。因此，在800°C下实现了高达1.68 mL min - 1 cm - 2的高氧渗透率，这与传统钙钛矿膜（3.53 mL min - 1 cm - 2）相当。通过稳定的甲烷电化学重整310 h，证实了NYSZ膜的超稳定性。因此，坚固耐用的NYSZ膜在实际应用中显示出巨大的潜力。

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