COLLOIDS AND SURFACES B-BIOINTERFACES
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2025
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IF 5.6
Yue Huang,Lunhao Zhi,Chong Cheng,Qiang Wei,Shudong Sun,Changsheng Zhao
In extracorporeal membrane oxygenation (ECMO) treatment, designing membrane with self-anticoagulant properties can solve problems resulting from the adverse effect of anticoagulants. In this study, 2,4,6-Triformylphloroglucinol (Tp) and 2,5-Diaminobenzenesulfonic acid (Pa-SO 3 H) were applied to grow a sulfonated COF film in situ on the polyethersulfone (PES) membrane. The introduction of sulfonic groups increased the hydrophilicity and electronegativity of the TpPa COF film, improved its anti-protein adhesion properties, maintained the normal morphology of blood cells, and endowed the COF film with antithrombotic properties. In the porcine blood circulation test, the duration to increase So 2 (O 2 saturation) from ∼75–95 % in TpPa-SO 3 H COF/PES membrane (M-TpPa-SO 3 H) was 70 min shorter than that in TpPa COF/PES membrane (M-TpPa). This preparation method is applicable to the preparation of not only flat membranes, but also hollow fiber membranes. These findings emphasize the potential of M-TpPa-SO 3 H in ECMO applications, providing superior antithrombotic property and CO 2 efflux potential.
研究领域:
生物医学工程
·
材料科学
·
血液学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Mengxuan Zhang,Baoyu Wang,Mengying Xie,Jie Bai,Runnan Zhang,Hong Wu,Zhongyi Jiang
The thin-film composite (TFC) membranes fabricated via interfacial polymerization (IP) of polyamide selective layers on porous substrates have prevailed in nanofiltration. An effective porous substrate is expected to play a synergistic role in optimizing the overall membrane performance by reducing transport resistance and promoting the formation of the selective layers. Although electrospun nanofibrous membranes (ENM) with high porosity and interconnected network are inherently engineered as substrates to facilitate transport processes, their poor monomer storage ability impedes the subsequent formation of defect-free polyamide layers. In this work, an in-situ covalent organic framework-modified ENM (COF@ENM) was prepared and employed as a hybrid substrate to construct ultra-thin and defect-free polyamide TFC membranes. The introduction of TpPa-SO₃H COF effectively captures and stores the amine monomers through inherent pores and electrostatic interaction. The optimized PA/COF@ENM membrane achieved a remarkable water permeance of 45.7 ± 0.5 L·m −2 ·h −1 ·bar −1 , while successfully maintaining a high Na 2 SO 4 rejection of 98.6 %. Overall, the outstanding performance of the in-situ TpPa-SO₃H COF-modified nanofibrous substrates-based TFC membrane can lead to new advances in nanofibrous substrates manufacturing.
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高影响因子
JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Yingying Wang,Taipeng Jiang,Jian Wu,Sheng Chen,Meng Li,Weijie Wei,Lingling Zeng,Jin Li,Zhuwei Gao
In this study, a multifunctional composite membrane (PDMS@CNT@COF@CF) integrating superhydrophobic, efficient photo-thermal conversion, and electrical insulation properties was developed through a functional co-design strategy. The material was constructed by depositing a covalent organic framework (COF) on the surface of carbon nanotube (CNT) via room temperature in situ polymerization. It was then robustly anchored onto a cotton fabric (CF) substrate through polydimethylsiloxane (PDMS) coating. The prepared composite membrane exhibited excellent superhydrophobic in air (water contact angle of 157.4°), and achieved separation efficiencies exceeding 96.0 % for both light and heavy oils. The separation efficiency of 98.6 % with a flux of 12913.6 L/m 2 · h was maintained after 30 cycles of use. Furthermore, the in-situ modification of COF significantly enhanced the volume resistance of the material to the MΩ level, which was three orders of magnitude higher than pure CNT. Notably, under 1.0 kW/m 2 simulated sunlight, the surface temperature of the PDMS@CNT@COF@CF rase to 76.3 °C within 180 s. The synergistic photothermal-superhydrophobic effect significantly reduced the viscosity of crude oil, enabling continuous recovery when coupled with a peristaltic pumping system. It is expected to facilitate the research and development process of oil-water separation materials adapted to complex marine environments.
研究领域:
材料科学
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化学工程
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环境科学
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纳米技术
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能量转换
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shan Luo,Ran Chen,Ruiyuan Zeng,Dai Shi,Youqing Tian,Jiamei Sun,Zifan Song,Yuanhui Xiao,Jiashu Yuan,Jianghuan Shi,Haixiong Liu,Hanyang Liu,Beili Lu,Lirong Tang,Biao Huang,Jiande Lin,Meijie Wang,Xinda You
Ionic covalent organic framework (iCOF) nanosheet membranes hold great potential in nanofiltration-based desalination by offering superior chargeability for ion exclusion. However, controllable assembly of iCOF nanosheets into high-performance membranes remains challenging due to the electrostatic repulsion between them. We propose an electrostatic-modulation strategy to reduce the chargeability of iCOF nanosheets by modulating the dielectric properties of the solvent environment, which enables the fabrication of dense laminated charged COF membranes (CCOFMs). By decreasing the solvent dielectric constant from 78.5 (water) to 24.3 (ethanol), the zeta potential of sulfonated COF nanosheets is compressed from −35.8 mV to −3.76 mV. The reduction in chargeability weakens the electrostatic interaction energy between iCOF nanosheets by approximately 500 kJ mol −1 and thereby promoting the formation of a denser laminated structure during subsequent vacuum-assisted assembly. The denser structure of CCOFMs leads to narrowed effective pore size from 0.678 nm to 0.476 nm to enhance ion exclusion by coupling steric hindrance and electrostatic effect. The optimized CCOFM display outstanding rejections of ∼96.3%, ∼95.0%, and ∼80.0% for Na 2 SO 4 , MgSO 4 , and NaCl, respectively, surpassing the benchmark COF membranes. The dense structure also renders CCOFM outstanding stability by maintaining Na 2 SO 4 rejection above 94.7% for over 1000 h, which enables the purification of organic saline wastewater with Na 2 SO 4 rejection of ∼97.3% and tetracycline rejection of ∼99.9%. The electrostatic-modulated assembly of iCOF nanosheets enlightens the precise construction of charged laminated membranes for ion-related separations.
研究领域:
材料科学
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化学工程
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膜技术
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分离科学
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纳米技术
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DOI
高影响因子
AICHE JOURNAL
·
2024
·
IF 3.5
Ruilong Li,Yongjian Yang,Jingjing Chen,Chongchong Chen,Wenpeng Li,Xiaoli Wu,Jingtao Wang
Porous membranes, a type of material widely used in nanofiltration, are confronted with the limitation that the influence of channel–molecule interactions on transport behaviors has yet been investigated in detail. Herein, covalent organic framework membranes with adjustable pore sizes (⁓ 2.5 nm and ⁓ 1.2 nm) and chemical groups (−F, −OH, and −CO−) were prepared by interfacial polymerization. We demonstrate that strong channel–molecule attraction induces the formation of stable solvent layers along nanochannel walls, which protect central molecules from the attraction of chemical groups. Significantly, stable solvent layers permit fast transport of ethanol (245.6 L m −2 h −1 bar −1 ) with reactive black (RB) rejection of 96%. Likely, for membranes with weak channel–molecule attraction, no solvent layers are formed and molecules also transport smoothly. Interestingly, membranes that exhibit moderate channel–molecule attraction exert metastable solvent layers, thus displaying high transport resistance. This hindrance effect on molecule transport becomes more pronounced in smaller nanochannels.
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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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
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2024
·
IF 8
Runcheng Liu,Jie Yan,Jian Shi,Shouzhen Jiang,Wen Yang,Zihao Zhang,Mingshun Jiang
Tilted fiber Bragg grating-based surface plasmon resonance (TFBG-SPR) sensors, despite their portability and high sensitivity, often suffer from background interference and lack self-cleaning capabilities. Although two-dimensional materials possess the capacity to enhance sensor functionality, their integration frequently results in uneven dispersion or agglomeration of nanosheets, compromising stability and reproducibility. Herein, a novel TFBG-SPR sensor that integrates a large-area, self-supported covalent organic framework (COF) film with Ag nanoparticles (NPs) is proposed. The COF-366 film functions as a molecular sieve, selectively isolating target analytes from background molecules, thereby improving anti-interference performance. The Ag NPs generate localized surface plasmon resonance (SPR) hotspots, significantly enhancing the signal of the target analyte. Moreover, the sensor exhibits robust self-cleaning properties through SPR-driven photocatalytic degradation. These attributes collectively endow the sensor with superior anti-interference, self-cleaning, and high-sensitivity functionalities, making it suitable for reliable detection in practical applications. Experimental validation reveals that the sensor effectively eliminates background interference and maintains consistency across repeated measurements, achieving a detection limit of 1.5 × 10 –10 M for methylene blue. This work offers a promising candidate for large-scale environmental monitoring and other challenging detection scenarios, thereby expanding the application range of COF materials in advanced photonic devices.
研究领域:
传感器技术
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材料科学
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环境监测
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DOI
高影响因子
DESALINATION
·
2024
·
IF 8.3
Kai Zhao,Xueting Zhao,Qianying Lu,Yuanyuan Jiang,Jiefeng Pan
Solar interface evaporation technology can effectively draw fresh water from the abundant seawater by utilizing green and clean solar energy. Advanced photothermal conversion materials play a crucial role in solar interface evaporation. As an emerging class of crystalline conjugated polymers, COFs (Covalent Organic Frameworks) provide an ideal molecular platform for the design of photothermal conversion materials. However, the mechanisms in which COF nano-morphologies promote photothermal conversion and the interface evaporation process remain unclear. In this work, we take advantage of the highly designable structure and functionality of COFs and develop porphyrin squaric acid-based COF membranes by controlling the nucleation and growth of COF crystal templated by porphyrin self-assemblies. These membranes feature an intramolecular donor-acceptor (D-A) heterojunction structure favorable for photothermal conversion and a unique nanosheet array structure. The arrayed COF nanosheets enhance light absorption and reduce the enthalpy of water evaporation, thereby increasing the evaporation rate. The membrane achieves an evaporation rate of 2.32 kg m −2 h −1 and an evaporation efficiency of 85.7 %. The COF membrane enables solar-driven desalination and demonstrates long-term salt resistance. This work provides a practical approach for constructing interface evaporation materials with unique micro/nanostructures.
研究领域:
材料科学
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环境科学
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能源科学
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产品关联
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2024
·
IF 8.4
Yanting Tang,Qingnan Wang,Xiaohe Tian,Chenlu Liu,Keming Zhang,Xiaoting Feng,Rui Zhang,Yueyangchao Yu,Shaofei Wang
Covalent organic frameworks (COFs), characterized by their well-organized porous structure, exhibit promising prospects for carbon capture. Nevertheless, their weak film-forming property and relatively large pore sizes constrain their utilization as gas separation membranes. This study introduced a facile approach to fabricating COF membranes tailored for CO 2 separations. By introducing an extra monomer, trimesoyl chloride (TMC), together with COF monomers, a thin and defect-free layer of COF-polyamide was synthesized by interfacial polymerization process. The amide structure embedded into the COFs layers was expected to mend the defects, strengthen the binding forces, and improve the stability of the COFs layers. To further enhance the performance, imidazolium ionic liquid (IL) was adopted to modify the COF-polyamide layer. The introduction of TMC rendered the COF-polyamide layer more negatively charged, facilitating stronger binding to the positively charged cations in the IL. This modification with IL effectively reduced the pore size of the COFs and increased the affinity for CO 2 . The resultant COF composite membranes exhibited a high CO 2 permeance of 125.9 GPU and CO 2 /N 2 selectivity up to 35.0, accompanied by robust long-term stability. Our method paves a new way for the fabrication and application of interfacial polymerized COF membranes for gas separation applications.
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
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Rui Ge,Teng Huo,Ming Xue Nie,Juan Lu,Haijun Hou,Xia Zhan
Graphene oxide membrane (GOM) possesses ultrafast and tunable two-dimensional water transport pathways, making it an ideal candidate for nanofiltration separation of dye wastewater. However, GOM also faces great challenges such as poor aqueous stability, collapse of non-oxygenated regions under high pressure, and limitations imposed by trade-off effects. In this study, covalent organic frameworks (COFs) were in-situ formed within GOM interlayers and on membrane surface to enlarge interlayer spacings and enhance hydrophilicity of GOM simultaneously via a two-step method including monomer retention in GOM and in-situ confined interfacial polymerization of COFs. Fourier transformation infrared spectroscopy (FT-IR) and X-ray photoelectron spectrometry (XPS) results confirmed the successful synthesis of COF on GOM surface, which enhanced membrane surface hydrophilicity and bridged the split defects of GOM. According to X-ray diffraction measurements (XRD) and scanning electron microscope (SEM) results, COF@GO membranes possessed enlarged interlayer spacings and increased thickness of selective layer, which indicated the successful intercalation of COF into GO interlayer. COF@GO-50 membrane exhibited an ultrahigh pure water permeability (PWP) of 148.1 L/(m 2 ·h·bar), with 99.0 % rejection for direct red 80 (DR80) aqueous solution and 9.6 % NaCl rejection. The ultrahigh water permeance might be ascribed to the enlarged interlayer pathways, the shortened vertical pathways provided by in-plane pores of COF nanosheets, and enhanced water adsorption capacity due to enhanced membrane hydrophilicity. Moreover, COF@GO nanofiltration membrane demonstrated excellent anti-fouling properties and long-term stability in 30h continuous operation, maintaining considerable separation efficiency under harsh conditions. This work provides a straightforward and applicable strategy to simultaneously enlarge interlayer spacings and enhance surface hydrophilicity of GOM via in-situ confined preparation of COFs, achieving ultrahigh water permeance and overcoming the trade-off effect between permeability and selectivity of GOM.
研究领域:
材料科学
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环境工程
·
化学工程
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Yanyun Hou,Zhengjun Su,Yuhuan Wu,Jing Ma
Covalent organic frameworks (COFs) have shown great potential in separation applications owning to their tunable framework and rich chemical properties. However, preparing flexible COF membrane with precise separation performance is challenging. Herein, inspired by the “brick–mortar” structure, we designed a flexible COF composite membrane with the synergy of carbon nanotube (CNT) and metal–organic framework (MOF) through a multi-interface regulation strategy. Specifically, CNT (sand) was inserted in COF interlayers (brick) for improved flexibility. To achieve better molecular-sieving effect of the membrane, MOF (cement) was confined grown in the pores of COF/CNT composite. The formed heterogeneous structure endows the COF composite membrane with interpenetrated molecular sieving pores. As a result, the obtained COF composite membrane exhibits good flexibility. Meanwhile, the COF composite membrane shows high permeability and rejection ratios for dyes because of the precise sieving pores. This facile strategy presents an attractive insight into the development of other advanced membranes for broad application prospects.
研究领域:
材料科学
·
环境科学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2021
·Vol. 56
·期 23
·13031-13042
·
IF 4.22
Liu Yanyan,Lyu Qiang,Wang Zhikun,Sun Yi,Li Chunling,Sun Shuangqing,Lin Li-Chiang,Hu Songqing
Frequent oil spills pose severe damages to the marine ecosystems and result in hazardous fires when the spilled oil is ignited. Developing high-performance, flame-retardant absorbent materials for large-scale water treatment is therefore urgently needed. Herein, we report an efficient post-synthetic silylation process to achieve a porous covalent-organic framework (COF), denoted as [CF 3 ] − COF. The absorption capacity of oils and organic solvents in [CF 3 ] − COF was explored by experimental measurements with the absorption mechanism illuminated by molecular simulations. The prepared [CF 3 ] − COF powders were further loaded into melamine sponge to yield a highly hydrophobic absorbent denoted as [CF 3 ] − COF@sponge, which was demonstrated to effectively remove oils/organic solvents with outstanding stability and excellent flame retardancy. Moreover, an oil-collecting apparatus was designed to continuously separate oils/organic solvents from water. The rapid recovery of oils/organic solvents from water using this device proves the great promise of [CF 3 ] − COF@sponge in water treatment.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
ACS Catalysis
·
2026
·
IF 13.6
Yin-Xian Chen,Zi-Ying Liang,Songlin Deng,Ya-Nan Fan,Ting-Ting Nan,Qing-Hua Dai,Wei Geng,Yang-Yang Xiong,Cheng-Xia Chen,Mei Pan,Cheng-Yong Su
The precise construction of robust photoredox/organometallic platforms holds great potential for synergistic metallaphotocatalytic (MPC) organic transformations, yet it is highly challenging. Herein, we demonstrate a facile and versatile methodology of post-synthetic metallization (PSM) for precise immobilization of single-atom Ni sites into a photosensitive triazine-functionalized sp2 carbon-conjugated COF (TFPT-BpyDAN-COF) to construct a robust dual photoredox/Ni catalyst, TFPT-BpyDAN(Ni)-COF. TFPT-BpyDAN(Ni)-COF showcases efficient MPC C−S/C−N cross-coupling performance between various aryl iodides and amines/thiols with yields of up to 99%, which is better than its homogeneous counterpart, due to a spatial proximity effect of photoredox centers and Ni catalytic centers that effectively facilitates rapid electron transfer to produce NiI active sites for the oxidative addition. Moreover, TFPT-BpyDAN(Ni)-COF presents good recyclability and durability, attributable to its high physicochemical stability and distinct site isolation effect. The underlying MPC mechanism has been well illustrated by detailed experiments. This work demonstrates that immobilizing organometallic catalysts into a photoactive full-sp2 carbon-conjugated COF offers significant benefits for C−S/C−N bond formation, providing an effective strategy for ingeniously designing high-performance MPC scaffolds.
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高影响因子
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