Advanced Membranes
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2025
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IF 9.5
Chen-Jie Wei,Xun Li,Xing-Yu Chen,Ya-Wei Lin,Dong Yu,He-Lin Zhu,Xue-Li Cao,Bai-Long Xu,Li-Fen Liu
High temperature resistant thin-film composite polyamide (TFC PA) membranes are notable across various applications. However, the pursuit of efficient separation at elevated temperatures was hindered by the thick and unstable active layer. In this work, based on covalent organic frameworks (COFs) decorated with exceptional porosity, remarkably large specific surface areas, and outstanding thermal stability, a TFC PA reverse osmosis (RO) membrane featuring a slimmer selective layer and enhanced thermal stability was achieved through interfacial polymerization mediated by COF nanoparticles as aqueous-phase modifier. Firstly, a novel COF TpDATB nanoparticles with high free volume and rigidity were designed and synthesized based on 3,3'-diamine-Trögers base (DATB) with V-shaped rigid structure and 1,3,5-Triformylphloroglucinol (Tp). The introduction of COF TpDATB nanoparticles retards the penetration of the aqueous phase into the organic phase, facilitating the formation of a thinner and more uniform PA selective layer. The resultant COF TpDATB modified TFC RO membrane exhibited a water permeance of 35.8 L/(m 2 ·h) and high salt rejection rate of 99.6%. Notably, the hydrogen bond crosslinking density might be increased owing to hydrogen bond formation between carboxyl groups of PA separation layer and a tertiary amine group of COF TpDATB , which further guarantee the high salt rejection under high temperature. The membrane showed a high water permeance of 83.7 L/(m 2 ·h) and rejection rate of 99.1% even at 70 °C. Overall, enhanced by incorporation of COF TpDATB nanoparticles, TFC PA RO membrane exhibited excellent thermal stability and separation efficiency. The current work is envisaged to supply direction for the high-performance TFC PA RO membrane for high temperature resistance.
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DOI
高影响因子
Analytical Methods
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2025
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IF 2.6
Yu Gan,Yingying Fu,Zhengchao Duan,Lianzhi Wang
Pentachloronitrobenzene (PCNB), an organochlorine fungicide, poses a serious threat to the ecological environment and human health owing to its high toxicity and strong bioaccumulation potential. Therefore, establishing a simple and sensitive method for PCNB detection is of great significance for safeguarding public health and public safety. Covalent Organic Frameworks (COFs) possess advantages such as unique structure and excellent performance; when combined with high-sensitivity fluorescence detection technology, they show broad application prospects in pesticide residue detection. In this study, a novel fluorescent probe material (COFML-Tp) was synthesized at room temperature using melem (ML) and triformylphloroglucinol (Tp) as raw materials. Based on the Inner Filter Effect (IFE) occurring between PCNB and COFML-Tp, the fluorescence intensity of COFML-Tp is significantly reduced or even quenched, thereby realizing the quantitative detection of PCNB. Experimental results show that this fluorescent probe exhibits high sensitivity (limit of detection, LOD = 0.46 μM; limit of quantification, LOQ = 1.53 μM), a wide linear range (1.53-40 μM), and good selectivity in PCNB detection. Furthermore, the material has excellent chemical stability and hydrophilicity, providing a new approach for the detection of PCNB in aqueous environments. This study not only expands the application potential of COFs materials in the field of pesticide detection but also provides technical references for pesticide residue monitoring and food safety supervision.
研究领域:
环境化学
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分析化学
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材料科学
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食品安全
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传感器与检测技术
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DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Chengbo Liu,Shichao Liu,Bo Pang,Guihui Xie,Huimin Zhao,Li Tian,Fujun Cui,Zijun Zhao,Yan Dai,Xiaoming Yan,Gaohong He,Xuemei Wu
Covalent organic frameworks (COFs) are expected to break through the trade-off between proton conduction and vanadium ion permeation in ion conductive membranes, however, maximizing intrinsic benefits of the nanoscale COF materials in polymer-based membranes remains a challenge. Herein, the ionic cluster in the membrane acts as a template to create a unique morphology of COF/ionic cluster intergrown ion conductive channel. The ionic cluster template anchors tris (4-aminophenyl) amine (TAPA) monomer through multiple hydrogen bond interactions with sulfonic acid groups during the casting of the sulfonated polybenzimidazole (SPBI) membrane, inducing the intergrowth of TpTAPA-COF nanoparticles with ionic clusters. The intergrown COF/ionic cluster microphase significantly increases the size of hydrophilic ion conductive channel from 5-8 nm to 20–30 nm with only about COF content of 1 wt%, and establishes vanadium ion sieving networks through the 6 Å pores of TpTAPA-COF. This leads to a high ion selectivity of the SPBI/COF-1 % membrane (8.1 × 10 9 mS s cm −3 ), about 3.9 folds that of Nafion 212 (2.1 × 10 9 mS s cm −3 ). The corresponding vanadium redox flow battery (VRFB) shows a high energy efficiency of 82.3 % at 200 mA cm −2 and maintain stable cycling performance over 800 cycles without change in chemical structure. The design of COF/ionic cluster intergrown microstructure provides an effective strategy for incorporating COFs into polymer matrix.
研究领域:
材料科学
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电化学
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能源存储
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膜科学
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高分子化学
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纳米功能材料
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DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
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2025
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IF 9
Yi Huang,Meng Cao,Lingfei Ye,Jie Liao,Haonan Wu,Lan Yi,Shangqing Chen,Fanpeng Cheng,Huijuan Guo,Liwei Cheng,Lijuan Shi,Qun Yi
Mixed matrix membranes (MMMs) incorporating porous fillers offer transformative potential for gas separations, yet their practical implementation is often hindered by interfacial defects and the inherent permeability–selectivity trade-off. Herein, we propose a covalent organic framework (COF) engineering strategy that integrates ionic functionalization with alkyl chain length modulation (C2, C8, C12) to fabricate high-performance 6FDA-DAM-based MMMs. By grafting bromoalkanes onto the pyridinic sites of TpDp COF, the resulting ionic COFs (iCOF TpDp–CnBr) synergistically eliminate interfacial voids through Br − -mediated electrostatic attraction and alkyl-dependent van der Waals interactions, while the bromide anions establish CO2-philic nanochannels via ion–quadrupole interactions. At 10 wt% loading, the 6FDA-DAM/TpDp–C8Br MMM achieves a CO 2 permeability of 363.7 Barrer and a CO 2 /CH 4 selectivity of 48.7, representing a 2.4-fold increase in permeability and a 2.7-fold enhancement in selectivity over the pristine polymer. This dual improvement transcends the 2008 Robeson upper bound, driven by optimized interfacial adhesion and tailored redistribution of free volume. Long-term stability tests (35 °C, 0.2 MPa) confirm structural integrity under the evaluated conditions. Density functional theory simulations reveal that the C8 alkyl chain minimizes interfacial energy by balancing steric hindrance and polymer–filler compatibility, establishing a charge–chain molecular design paradigm for next-generation membranes with promising application in natural gas purification.
研究领域:
材料科学
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膜技术
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气体分离
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高分子化学
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可持续能源
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DOI
高影响因子
MICROCHEMICAL JOURNAL
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2024
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IF 4.9
Weili Hao,Fanghua Yin,Ke Wang,Ling Ma,Kaoqi Lian,Hongmei Shi
Currently, antibiotic residues in the environment pose a serious public health risk; therefore, new sensitive approaches for detecting the presence of antibiotics are urgently needed. Ionic-type covalent organic frameworks (TAPB-(TFIT) + Cl − -COFs) were designed and prepared in this work, and these imine-linked COFs were characterized by several techniques, proving of porous structure and rich of nitrogen. The materials were applied to the extraction of β-lactams from aqueous samples, and the important parameters of the adsorption–desorption conditions were optimized. A dispersive solid-phase extraction method coupled with ultrahigh-performance liquid chromatography-tandem mass spectrometry (TAPB-(TFIT) + Cl − -COFs-d-SPE-UPLC-MS/MS) was proposed and utilized to determine the levels of 11 antibiotics in the β-lactams in the extracted samples. Good linearity (1.0–200.0 μg·L −1 , r > 0.9999) was achieved together with limits of detection and quantification of 0.01–0.92 μg·L −1 and 0.05–2.78 μg·L −1 , respectively; recoveries ranged from 75.57 to 114.20 %, conferring relative standard deviations < 8.99 % and negligible matrix effects (84.88–109.40 %). The synthesized TAPB-(TFIT) + Cl − -COFs were demonstrated to have good reusability and high stability. Furthermore, the proposed method was clearly shown to be sensitive and separable for the reliable simultaneous detection of 11 β-lactam residues in aquatic environments.
研究领域:
环境科学
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分析化学
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药物分析
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Chengxia Tan,Jianye Li,Wei Liu,Qiaowei Zhao,Xuedong Wang,Yanyan Li
For the first time, a kind of novel magnetic covalent organic framework nanocomposites (NiFe 2 O 4 @COFs) was fabricated through facile room-temperature synthesis approach. The magnetic nanocomposites (MNCs) were based on NiFe 2 O 4 as magnetic core and COFs as shell. The NiFe 2 O 4 @COF MNCs were used for the first time as an adsorbent/extractant in the effervescent reaction-enhanced microextraction (MNER-EM) procedures. The equilibrium adsorption capacities ( Q e , mg/g ) of six endocrine disruptors (EDs) on the MNCs reached up to 38.3–88.1 mg/g, which mainly resulted from strong π-π interactions between EDs and NiFe 2 O 4 @COF MNCs. The MNER-EM method integrated efficiently MNCs-based adsorption/extraction, CO 2 -induced vigorous dispersion and conveniently magnetic separation into one synchronous step. Several operational parameters were rigorously optimized, including molar ratio of effervescent tablet composition, kind and dosage of adsorbent, kind of elution solvent, pH, extraction temperature and salt addition. Under optimized conditions, the MNER-EM/HPLC-FLD method had a good linear range (0.1 ~ 0.5–200 µg L −1 ), good recoveries (83.4–106.2%), low limits of detection (0.019–0.096 µg L −1 ) and high precision (RSDs of 3.11–5.73%) for six EDs in real-world water, beverage and human urine and serum samples. Consequently, the NiFe 2 O 4 @COF MNCs provide a good alternative for replacing traditional magnetic separation and adsorbent materials, and also this proposed method shows a great potential in conventional monitoring of trace EDs in liquid matrices.
研究领域:
分析化学
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环境科学
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材料科学
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DOI
高影响因子
Sustainable Materials and Technologies
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2025
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IF 9.2
Dan Xu,Yuwei Hua,Yanyan Huang,Yiming Zhao,Xin Chen,Jingyuan Zhang,Ge Chen,Guangyang Liu,Zhijian Wu,Xiaomin Xu,Donghui Xu
The rapid industrialization and extensive use of synthetic dyes have led to significant environmental pollution, particularly through dye wastewater, which poses severe ecological risks. Conventional single treatment methods often struggle to effectively remove complex and stable dye molecules. In this study, we developed COF-based chitosan hydrogel microspheres by combining COF-LZU1 and Co(OH)₂ via co-precipitation and self-assembly techniques. The synergistic effect between COF and Co(OH)₂ enabled simultaneous adsorption and degradation of neutral red, significantly enhancing the adsorption capacity. Under optimal conditions (15 mg of composite material, 20 min reaction time, pH = 7), the composite exhibited an adsorption capacity of 1325.48 mg/g and a degradation efficiency of 100 %, surpassing the performance of most conventional adsorbents. Furthermore, the incorporation of Co(OH)₂ into COF enhanced the stability of the composite material, as indicated by thermodynamic analysis and adsorption performance across different component ratios. Adsorption process modeling revealed that the adsorption kinetics fit well with the Elovich model, while isothermal adsorption followed the Langmuir model. Among common interfering substances, CH₃COO − was found to enhance the catalytic process, whereas humic acid inhibited it. Quenching experiments and EPR analysis confirmed that superoxide anion radicals (•O₂ − ) and singlet oxygen ( 1 O₂) were the primary active species in the catalytic process, with hydroxyl radicals (•OH) playing a relatively minor role. This study highlights the synergistic interaction of COF and Co(OH)₂ in improving adsorption performance, stability, and catalytic efficiency, providing a novel strategy for the preparation of advanced composite materials and new insights into pollutant removal mechanisms.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2026
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IF 9.6
Yazhou Kang,Xiaohai Wu,Shaohui Guo,Mengxiang Cheng,Xiaojian Bai,Xian-Ming Zhang
Acrylic resin is widely used for wall painting conservation but is limited in weather resistance due to insufficient ultraviolet (UV) resistance and poor water vapor permeability. Most modification strategies employ inorganic nanoparticles; however, interfacial structural mismatch and insufficient bonding strength between phases often result in coating embrittlement. This study develops a molecular-level compatibility regulation strategy for in situ polymerization of acrylic resin monomers on nano covalent organic frameworks (COFs) to enable robust interfacial bonding through chain entanglement and hydrogen-bonding interactions. Through precise structural control of COFs, the coating achieves synergistic enhancement in mechanical strength and multifunctional performance, ensuring sustainable conservation of wall paintings. The optimized coating (P/T-30%) exhibits a fracture strain of 630%, an average UV transmittance of 37.27% (290 − 400 nm), and a water vapor transmission rate of 30.92 g/(m 2 ·24h). Under multi-factor accelerated aging tests combining UV irradiation and condensation, P/T-30% demonstrates superior overall protective performance compared to conventional protective materials. Density functional theory calculations reveal that incorporating nano-COF units substantially elevates the cohesive energy of the polymer system, thereby elucidating a key internal mechanism for enhancing weather resistance. These findings provide a pioneering approach for the application of emerging two-dimensional nanomaterials in cultural heritage conservation
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DOI
PubMed
高影响因子
FOOD CHEMISTRY
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2023
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IF 8.8
Dongdong Li,Hongyuan Zhao,Guoquan Wang,Runqiang Liu,Lianyang Bai
Diuron (DU) exhibits good weed control effect but possesses strong hazard to human health, thereby designing a fast and sensitive method to detect DU is highly urgent. Herein, we report the ultrasonic-assisted self-assembly synthesis of porous covalent organic frameworks (COFs) spheres@graphitized multi-walled carbon nanotubes (GCNTs) composite based on π-π conjugation effect at room temperature, which was employed for DU determination. For the COFs@GCNTs composite, COFs with ultrahigh specific surface area shows strong adsorption ability towards DU, whereas GCNTs with favorable conductivity help to form the 3D interconnected conductive network around COFs spheres, thereby effectively compensating for the poor conductivity of COFs. Because of the synergistic effect between COFs and GCNTs, the developed sensor presented a low detection limit of 0.08 µM in the concentration range of 0.30–18.00 µM. Moreover, the actual sample analysis in the tomato and cucumber yielded satisfactory recoveries (96.40%–103.20%), proving reliable practicability of the developed sensor.
研究领域:
材料科学
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食品科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
ENVIRONMENTAL RESEARCH
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2023
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IF 8.3
Shan Peng,Haobo Ma,Xiaoyan Hao,Ruimeng Han,Xiaoyu Ji,Lei Wang,Yanyan Fang,Kyongjin Pang,Kwon Il-Ho,Xiaoxin Chen
Oil spills and micropollutants have become thorny environmental issues , posing serious threat to ecosystem and human health. To settle such dilemma, this study successfully constructed a robust and environmentally-friendly MOFs-COFs hybrid-based membrane (FS-50/COF(MATPA)-MOF(Zr)/PDA@PVDF) for the first time through solution synthesis and solvothermal method, combined with surface modification of FS-50 molecule. Importantly, we employed a simple two-step strategy to obtain the high-aspect-ratio MOFs fibers: (1) solvent regulation to generate smaller needle-like whiskers during the in-situ growth of MOFs on COFs; (2) high pressure induced directional crystallization in filtration process. The introduction of polydopamine (PDA) greatly improved the adhesion between coating and PVDF membrane. The in-situ growth of high length-diameter ratio MOFs fibers on blocky COFs greatly enhanced the specific surface area of MOFs-COFs hybrid, thus provided sufficient absorption sites. The functional groups of FS-50 endowed the hybrid membrane with superhydrophilicity and superoleophobicity, which facilitated to selectively penetrate water molecules and repel non-polar pollutants. The separation efficiency and decontamination mechanism of hybrid membrane to the simulated oily wastewater (containing various MPs , dyes, and pesticides) were investigated through experiments and theoretical calculations. The hybrid membrane could selectively and synchronously adsorb various dyes (20 mg/L–120 mg/L, almost 100% removal) and pesticides (10 mg/L for DIF and TET, adsorption rates 93.2% and 90.9%, respectively) from oil-water emulsion (50 mL). The large-scale coated sponge (6 cm × 4.5 cm × 3 cm) could quickly achieve separation of oil-water mixture (almost 100%) with a water permeability of more than 162 L m −2 ·h −1 ·bar −1 , and simultaneously remove various MPs (PP-2000, PP-100, PE-2000, PS-100, 0.2 g/300 mL for each), Sudan Ⅲ (C 0 = 200 mg/L), and DIF (C 0 = 10 mg/L) from a simulant oily wastewater (300 mL), with the removal rates of almost 100% for MPs, 99.7% for Sudan Ⅲ, and 95.8% for DIF. Furthermore, we elucidated the removal mechanism of pesticide and dyes through simulating the theoretical adsorption energy and potential adsorption sites. The hybrid membrane not only provides a promising candidate for the removal of multiple pollutants from oil-water emulsion, but also opens a new strategy for achieving efficient and clean aquatic environment restoration.
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DOI
PubMed
高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Yuzhao Hou,Binyan Yang,Simon Sani Ocholi,Fengchao Wang,Zhifei Fu,Liming Wang,Lifeng Han,Pengli Du,Jia Zhao,Ping He,Zixin Zhang,Erwei Liu
Estrogen compounds in food exhibit bioaccumulation and endocrine-disrupting effects, posing serious risks to ecosystems and human health. Here, a novel core–shell magnetic covalent organic framework (COFs @ Fe 3 O 4 @C NPs) was developed for efficient enrichment and sensitive detection of estrogens in meat samples. The adsorption feasibility and mechanism of TAPB-DVA-COF were investigated using density functional theory (DFT) and molecular dynamics simulation (MDS). DFT calculations confirmed that hydrogen bonding and π–π stacking drive spontaneous adsorption, with adsorption energies ranging from −21.26 to −11.59 kcal mol −1 . MDS further revealed the formation of stable estrogen-COF complexes through close interfacial contact and persistent hydrogen bonding, confirming the existence of low-energy conformations. Based on these insights, COFs were anchored onto polydopamine-modified carbon-coated Fe 3 O 4 nanoparticles at room temperature to fabricate a magnetic adsorbent, which was then employed as a magnetic solid-phase extraction (MSPE) material. The adsorbent exhibited high surface area, strong magnetic responsiveness, and excellent stability. Coupled with high-performance liquid chromatography (HPLC), the established MSPE–HPLC method achieved a wide linear range ( R ≥ 0.9996) and low detection limits (0.21–12.79 μg L −1 ). In pork and chicken samples, recoveries ranged from 91.7 % to 113.5 % with relative standard deviations of 1.0–6.1 %. This study demonstrates the superior performance of COFs @ Fe 3 O 4 @C NPs for estrogen detection and highlights MDS as an efficient and economical tool for predicting adsorption behavior, offering valuable guidance for material design.
研究领域:
分析化学
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食品安全
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纳米材料
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计算化学
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环境毒理学
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药物代谢
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分离科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
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IF 13.273
Qinzhi Wang,Yijian Zhao,Zhan Shi,Xinyu Sun,Tong Bu,Changqiu Zhang,Zexiang Mao,Xiaohan Li,Li Wang
Azo dyes in soft drinks present a serious risk to human health and are strictly limited in many countries. Herein, we demonstrate that covalent-organic framework (COF) can be facilely grown on magnetic metal–organic framework (MOF) to form three kinds of porous Fe 3 O 4 @MOF(M = Fe, Ti, Zr)@COFs composites for efficient azo dyes adsorption. Adsorption performances of Fe 3 O 4 @MOF(M = Fe, Ti, Zr)@COFs toward azo dyes were systemically investigated by adsorption kinetics , adsorption isotherms and adsorption thermodynamics. Under optimized conditions, the maximum adsorption capacities of both Fe 3 O 4 @MOF(Fe)@COF and Fe 3 O 4 @MOF(Zr)@COF for Congo red (CR) are 1250.02 and 625.13 mg g −1 , and the Fe 3 O 4 @MOF(Ti)@COF for Chrysoidine (CYD) is 294.12 mg g −1 , all which are higher than those of mostly previous reports. Furthermore, possible mechanisms of adsorption were revealed through Fourier-transform infrared spectra and X-ray photoelectron spectroscopy analysis. These Fe 3 O 4 @MOF(M = Fe, Ti, Zr)@COFs composites also present good biocompatibility, and exhibit high adsorption capacities for CR or CYD in soft drinks, which can be suggested as effective adsorbents for the azo dyes removal from soft drinks.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）