JOURNAL OF MEMBRANE SCIENCE
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2025
·
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
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Xue-Jie Zhang,Wen-Cui Li,Ya-Qi Ba,Gang Li,Guang-Ping Hao,An-Hui Lu
The uptake of hydrogen (H 2 ) from natural gas pipelines (CH 4 ) through membrane separation technology is an efficient avenue of obtaining H 2 resources. Carbon membranes have the potential to be an attractive option for energy-efficient gas separations in the next generation of membranes due to their precise molecular discrimination ability and easy scalability. Here, we report a carbon membrane composed of a mesoporous substrate, seed layer and sieving layer, achieving a one-step uptake with 55.3 × 10 -9 mol·m −2 ·s −1 Pa −1 permeance and a separation factor for H 2 /CH 4 of 359.1 by feeding hydrogen (20 vol%). As revealed by the kinetic diffusion experiment, H 2 is transported in mesoporous substrate via Knudsen flow, differing from the transition flow taken by CH 4 , thus H 2 diffusion rates exceed CH 4 by an order of magnitude, which substantially increased H 2 purity from 20 vol% to higher purity as gas mixtures passed through the substrate. Then, the H 2 passed through the seed layer and sieving layer, resulting in a final H 2 purity of ∼ 99 vol%, a sharp increase from the initial low concentration. This carbon membrane integrates three functions of capture, pre-separation and purification into one material and provides a new solution for the uptake of H 2 from CH 4 .
研究领域:
材料科学
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能源工程
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DOI
高影响因子
Small
·
2025
·
IF 12.1
Yi Huang,Ruobing Yi,Yu Qiang,Binyou Xie,Min Zhang,Shanshan Liang,Junlang Chen,Shuai Wang,Liang Chen
Intelligent membranes with programmable permeance and precise sieving performance are in high demand for complex water treatment scenarios. Herein, a bioinspired membrane featuring intelligent adaptive 2D nanochannels with outstanding molecule sieving performance is reported. In particular, a protein-mimetic 2D nanochannel with pH-responsive characteristics is constructed by introducing sodium alginate (SA) molecular chains into GO laminates. The conformational transformation of SA chains under varying pH conditions enables adaptive regulation of the 2D channel size and selective molecular transport. The resulting GO-SA membrane possesses outstanding water permeance up to 122.67 L m −2 h −1 bar −1 , along with a high sieving response factor of 50.12. Besides, it is discovered that the introduction of multivalent Ca 2+ ions can stabilize the membrane structure, thereby “locking” the pH-responsive behavior. Based on this, the water treatment system is designed can not only realize the multistage separation of dye molecules, but also enable the recovery and recycling of acid and alkali. This strategy provides insights for designing intelligent membranes with gated responses.
研究领域:
材料科学
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环境工程
·
生物学
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jie Gao,Li-Bo Huang,Xianghao Meng,Lei Xia,Fan Yi,Zexuan He,Zeyu Pei,Changting Hong,Guo Wang,Yuhan Wang,Zhongyi Jiang
Nanofiltration holds significant potential for mitigating water scarcity, yet reconciling high selectivity with efficient mass transfer remains a critical challenge. MXene membranes enable precise molecular sieving through interlayer spacing, while covalent organic framework (COF) membranes leverage penetrating pores for rapid mass transfer. However, MXene membranes suffer from restricted permeability and structural instability, whereas COF membranes face limitations in achieving small-sized pores and compromising sieving efficiency. Herein, we fabricate a heterostructured MXene/COF membrane by synergistically manipulating interlayer spacing of MXene with penetrating pores of COF via sequential vacuum-assisted self-assembly. Matched surface hydrophilicity and electrostatic property between MXene and COF render robust interfacial adhesion. The optimal MXene/COF membrane exhibits a water permeance of 356.6 ± 24.1 L m −2 h −1 bar −1 and a CR rejection of 99.8 %, along with excellent operational stability during 48-hour continuous filtration. The MXene/COF membrane opens a novel avenue for fabricating versatile heterostructured membranes for advanced separations.
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
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Zhiyuan Liu,Yanni Liu,Haoran Wang,Zhou Qu,Jinpeng Hou,Hong Meng,Hongwei Fan
Metal–organic framework (MOF) membranes have great potential in efficient helium (He) recovery, but it is highly demanded to improve their separation performance by enhancing molecular sieving. Herein, we explored an orifice-modified MOF-on-MOF bilayer membrane prepared by growing an amino-functionalized ZIF-7 layer on a ZIF-90 layer through an aldehyde-amine condensation reaction. Due to the precise docking between the aperture windows of the crystal cells of such two MOFs, the size-sieving effect was intensified for selective He separation. The resultant membrane exhibits significantly increased selectivities for He/N2 and He/CH4 along with a satisfactory He permeance (∼67 × 10–10 mol·m–2·s–1·Pa–1). Specifically, the He/N2 selectivity of the membrane can reach 16.19, which is about 5 times higher than that of the ZIF-90 membrane (3.24), ranking among the reported He-selective MOF membranes. In addition, a continuous operation for 100 h, subjected to a successive test at room temperature and 150 °C indicates that the membrane has excellent stability. The proposed concept of orifice-modified MOF-on-MOF would provide a new idea for the design and development of advanced MOF-based gas separation membranes.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2024
·
IF 8.4
Jinyuan Hu,Boru Cai,Yaohui Wang,Zhengran Bian,Tianle Hou,Yanwei Sun
Amorphous metal–organic frameworks (MOFs) present significant potential for achieving high permeability and selectivity in separation applications. However, developing effective fabrication strategies for amorphous MOF membranes with well-defined channels remains a considerable challenge. In this study, amorphous titanium-based MOF membranes with concurrently optimized intercrystalline and intracrystalline selective transport channels were successfully prepared. The resulting membranes exhibited exceptional sieving performance for dyes with molecular weight cutoff of 600 Da. Additionally, defect-rich dual water channels within and between the amorphous MOF aggregates led to a remarkable water permeances up to 107.4 L m −2 h −1 bar −1 , significantly surpassing the benchmarks set by other nanofiltration membranes. This work offers valuable insights into the influence of amorphization on the design of a wide variety of MOF membranes, paving the way for advanced separation applications.
研究领域:
材料科学
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化学工程
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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
·
2018
·
IF 6.578
Xinru Zhang,Tao Zhang,Yonghong Wang,Jinping Li,Chengcen Liu,Nanwen Li,Jiayou Liao
Mixed-matrix membranes (MMMs) for CO 2 /N 2 separation were prepared by incorporating nickel-substituted ZIF-8 (Zn/Ni-ZIF-8) into a polyether-block-amide (PEBA2533) polymer, in which the Zn and Ni ions in Zn/Ni-ZIF-8 have different affinities for CO 2 based on π-complexation; these MMMs exhibited exceptional molecular sieving properties compared to ZIF-8-PEBA MMMs. Scanning electron microscopy revealed that Zn/Ni-ZIF-8 nanoparticles were small and uniformly distributed within the PEBA, and attenuated total reflectance Fourier-transform infrared spectroscopy revealed good interfacial compatibility between the Zn/Ni-ZIF-8 and PEBA; consequently these MMMs exhibited excellent mechanical properties . The 10% Zn/Ni-ZIF-8-PEBA MMM showed a high CO 2 permeability of 321 Barrer, and a CO 2 /N 2 selectivity of 42.8 at 2 bar; these values were much higher than those of the 10% ZIF-8-PEBA MMM (266 Barrer and 33.8, respectively). We assume that different metal-ion affinities towards CO 2 resulted in the asymmetric adsorption/desorption behaviour of these MMMs, which led to a significantly higher permselectivity for the Zn/Ni-ZIF-8-PEBA MMM. The MMM loaded with 10% Zn/Ni-ZIF-8 exhibited long-term CO 2 -separation-performance stability under mixed-gas conditions, with a CO 2 permeability of 282 Barrer and a CO 2 /N 2 selectivity of 42.7. Moreover, the permselectivity of the 10% Zn/Ni-ZIF-8-PEBA MMM under pure-gas condition surpassed Robeson's upper bound reported in 2008.
研究领域:
材料科学
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环境工程
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产品关联
DOI
高影响因子
AICHE JOURNAL
·
2021
·Vol. 68
·期 3
·e17551
·
IF 3.993
Shi Tu,Liang Yu,Ying Wu,Yongwei Chen,Houxiao Wu,Liuqing Wang,Baoyu Liu,Xin Zhou,Jing Xiao,Qibin Xia
Developing energy-efficient alternatives for propylene (C 3 H 6 ) and propane (C 3 H 8 ) separation is of great significance and challenge in the petrochemical industry. Herein, we report the rational design of a new yttrium-based ultramicroporous metal–organic framework (MOF) comprised of 12-connected hexanuclear [Y 6 (OH) 8 (COO) 12 ] 2− cluster and 5-(3,5-dicarboxybenzoylamino)isophthalic acid (H 4 dbai) with ftw topology. It possesses a suitable pore window size and a relatively large pore volume for molecular sieving separation of C 3 H 8 from C 3 H 6 with a high C 3 H 6 capacity. At 298 K and 100 kPa, the adsorption capacity of C 3 H 6 was 2.57 mmol/g, which is the highest among the reported C 3 H 6 /C 3 H 8 molecular sieving MOF adsorbents. The molecular simulation revealed that the steric hindrance effect together with the electrostatic interaction of the oxygen sites in the window resulted in the molecular sieving separation of C 3 H 6 /C 3 H 8 . The breakthrough experiments confirmed its excellent separation performance under dynamic conditions to produce high purity (97.1%) of C 3 H 6 with a working adsorption capacity of 1.75 mmol/g.
研究领域:
化学工程
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材料科学
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产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 36
·18735-18744
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IF 11.301
Junyuan Xia,Peng Xiao,Jincui Gu,Tianyu Chen,Chaohui Liu,Luke Yan,Tao Chen
Graphene oxide (GO) has superior molecular sieving abilities due to its unimpeded two-dimensional (2D) nano-channels and nacre-like lamellar structure. However, it remains a huge challenge to fully exploit its unmatched features to construct a GO-based membrane on a large scale for excellent screening performance. Here, we display a facile, ultrafast and environmentally friendly strategy to design an ultrathin (graphene/graphene oxide@polyetherimide) GR/GO@PEI composite membrane under the collective effects of a hydrophilic PEI molecular-bridge and an ordered GR/GO laminar structure. Excitingly, this composite membrane presents extraordinary structural stability, even when transferred to any given substrate, regardless of its chemical components, structure, or specification. Furthermore, this membrane shows high permeance of up to 191 L m−2 h−1 bar−1 and over 99% rejection of Congo red, far superior to the majority of GO-based separation membranes reported so far. In addition, it can withstand several types of physical damage and chemical corrosion, as well as being further able to realize the purification of actual, complex, multi-component, domestic sewage. This work will open the door to developing scalable 2D lamellar membranes with ultrafast and precise separation channels for practical water purification.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2022
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IF 10.383
Qing Hu,Chaofeng Zhu,Wen Yan,Yang Wang,Songlin Cui,Xihai Chen,Bo Liu
Membranes composed of two-dimensional (2D) materials suffer from low stability and structural swelling and are usually restricted to applications in aqueous systems. Among various 2D materials, graphitic phase carbon nitride (GCN, g-C3N4) has shown great application potential owing to its structural tunability. Herein, we develop a coordination-assisted strategy to regulate the GCN layer spacing and chemical environment via copper ion (Cu2+) coordination-assisted intercalation of enantiopure (1S,2S)-(−)-1,2-diphenyl-1,2-ethanediamine (DPE) between GCN nanosheets. The obtained GCN-Cu-DPE membrane is continuous and intact, free of cracks and pinholes, stable under acidic and alkaline conditions, and exhibits water permeability above 215 L m–2 h–1 bar–1 and a high rejection rate to dye molecules. The membrane is amphiphilicity and thus allows both polar solvent (water) and nonpolar solvent (hexane) to freely pass through. Remarkably, the permeation rate is proportional to the viscosity of the solvent. Benefiting from the chiral space between nanosheets, the GCN-Cu-DPE membrane shows selective permeation of aspartic acid racemate in aqueous systems and limonene racemate in the organic phase. Our work demonstrates a general and promising strategy for chiral membrane fabrication toward high-value-added chiral separation, especially in the pharmaceutical industry.
研究领域:
材料科学
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化学工程
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分离技术
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Ao Tang,Zhuo Chen,Huijie Nie,Jie Dong,Xin Zhao,Xiuting Li,Qingsong Xu,Qinghua Zhang
A series of highly selective polyimide gas separation membranes were successfully synthesized by reacting the newly synthesized dianhydride monomers containing the amide unit and benzyl group with a commercial diamine, 1,3,5-trimethyl-2,4-phenylenediamine (DAM). The combination of the intermolecular hydrogen-bonding interaction from the amide-imide backbone and the thermo-oxidative cross-linking network induced by the benzyl units endows the membrane with a strong size-sieving capability with an ideal CO 2 /CH 4 selectivity > 125 (over six times higher than that of the commercial Matrimid 5218) with a moderate CO 2 permeability, ranking the top among that of the polyimide gas separation membranes reported so far. The comprehensive separation performance for the CO 2 /CH 4 gas pair surpasses the state-of-the-art 2008 upper bound. Moreover, the prepared membrane showed an increased stability toward high CO 2 pressure of 12 bar, demonstrating an excellent plasticization resistance due to the tightened molecular packing and confined molecular chain motion as well as the rigid nature of the polymer backbone, which also enabled high glass transition temperatures (>400 °C) and fine mechanical properties (tensile strength > 52 MPa) as well as an anti-aging property of the prepared membranes. This study provides a reliable route for constructing polymer membranes with an accurate gas molecular sieving ability and high durability.
研究领域:
材料科学
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化学工程
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2021
·
IF 8.742
Guiliang Li,Yanmin Qi,Haibo Lin,Na Lu,Jiaping Chen,Jianqiang Wang,Qiu Han,Fu Liu
Lamellar membranes are attracting extensive attention for high throughput and precise molecules/ions sieve separation. However, the energy-consuming exfoliation and low yield of single-layer nanosheets restrict the massive production of membranes. Herein, we facilely fabricated 2D Ni-mediated metal-organic framework (Ni-MOF) membranes directly from multiply stacked nanosheets (MSNs) for both aqueous and organic molecular sieve separation. Multiply layered nanosheets were obtained from a high concentration dispersion via simple ultrasonic treatment. The morphology and chemistry of synthesized Ni-MOF nanosheets were characterized via scanning electron microscopy (SEM), N 2 adsorption-desorption, Fourier transform infrared spectra (FTIR), and X-ray photoelectron spectra (XPS). The thickness of Ni-MOF membranes could be well regulated by the volume of dispersion. The membrane exhibited high molecular rejection to 8GX (97.29%), EB (96.28%), CR (99.69%), and CBB (93.31%) in water, respectively and a stable perm-selectivity in continuous 24 h filtration. The lamellar membrane showed excellent pressure and pH (2–10) resistance. The membrane achieved rational permeance of various organic solvents mainly depending on viscosity and good rejection to MB (91.37%), BY (92.01%), and EB (96.90%) in isopropanol.
研究领域:
材料科学
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化学工程
·
环境科学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）