JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Bin Yu,Tianhao Lan,Hui Wang,Linxuan Han,Yutao Liu,Jinping Li,Libo Li
The reverse separation of CO 2 /C 2 H 2 offers energy benefits while presents strategical challenges due to the similar molecular sizes of CO 2 /C 2 H 2 and the preferential adsorption/solution of C 2 H 2 by most adsorbents and membranes. However, except for thermodynamic factors, kinetic diffusion can also play a pivotal role, particularly embodied in the membrane-based separation process where permeation is governed by the combined effects of solubility and diffusion. Here, we report a mixed matrix membrane (MMM) incorporating a metal-organic framework (MOF), KAUST-7, that selectively blocks C 2 H 2 while allowing rapid CO 2 diffusion to implement a diffusion dominated, CO 2 -selective reverse separation process. Tetrafluoroborate ions (BF 4 − ) is introduced in situ as a structure-directing agent (SDA) during the synthesis of KAUST-7(BF 4 − ), which offers a regular and nanoscale morphology, and more uniform dispersion and enhanced interfacial compatibility within the polymer matrix. The resulting MMM, incorporating 10 wt% of KAUST-7(BF 4 − ), exhibits a CO 2 /C 2 H 2 selectivity of 11.36 and a CO 2 permeability of 571.74 Barrer, demonstrating for the first time the potential of membrane-based CO 2 /C 2 H 2 separation and probably stimulating intense exploration of CO 2 /C 2 H 2 separation membranes.
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ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Jiaxin Wu,Yuhan Ma,Haichang Zhang,Haonan Xie,Jin Hu,Chunsheng Shi,Biao Chen,Chunnian He,Naiqin Zhao
Poly(ethylene oxide) (PEO)-based electrolytes have been extensively studied for all-solid-state lithium-metal batteries due to their excellent film-forming capabilities and low cost. However, the limited ionic conductivity and poor mechanical strength of the PEO-based electrolytes cannot prevent the growth of undesirable lithium dendrites, leading to the failure of batteries. Metal–organic frameworks (MOFs) are functional materials with a periodic porous structure that can improve the electrochemical performance of PEO-based electrolytes. However, the enhancement effect of MOFs with different metal centers and the interaction mechanism with PEO remain unclear. Herein, MOF-74s with Cu or Ni centers are prepared and used as fillers of PEO-based electrolytes. Adding 15 wt % of Cu-MOF-74 to the PEO-based electrolyte (15%Cu-MOF/P–Li) effectively improves the ionic conductivity, lithium transference number, and mechanical strength of the PEO-based electrolyte simultaneously. Furthermore, the ordered pore channels of Cu-MOF-74 provide uniform Li-ion transport pathways, facilitating homogeneous Li+ deposition. As a result, the lithium symmetric cell with 15%Cu-MOF/P–Li shows stable cycles for 1080 h at 0.1 mA cm–2 and 0.1 mAh cm–2, and the Li | 15% Cu-MOF/P–Li | LFP full cell exhibits a long cycle life up to 200 cycles at 60 °C and 0.5 C, with a capacity retention rate of 89.7%.
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Applied Materials Today
·
2024
·
IF 7.2
Yuhang Xu,Senlin Rao,Yi Wendi,Yi Junchao,Feng Liu,Gary J. Cheng
The incorporation of shear thickening fluid (STF) into aramid fabric has emerged as a compelling strategy to augment the protective attributes of aramid-based soft body armor. The peak viscosity of STF assumes a pivotal role in shaping the efficacy of this enhancement. In this study, we present an innovation in the design and synthesis of an ultrahigh peak viscosity STF using metal-organic framework (MOF)/SiO 2 nanoparticles as the core constituents. The remarkable enhancement in peak viscosity of MOFs/SiO 2 -based STF, taking ZIF-8 as an exemplary MOFs material, is attributed to the pronounced interparticle contact friction facilitated by the rugged surface morphology of the ZIF-8/SiO 2 nanoparticles. Therefore, ZIF-8/SiO 2 -based STF (62.5 wt.%) demonstrates a peak viscosity approximately 3938 times greater than that of conventional SiO 2 -based STF (62.5 wt.%). This extraordinary STF formulation has been successfully employed in aramid fabric-based soft body armor, resulting in a significantly advancement in protective performance. Compared to Kevlar fabric impregnated with SiO 2 -based STF (62.5 wt.%), the utilization of ZIF-8/SiO 2 -based STF (62.5 wt.%) results in substantial and scientifically significant improvements in key mechanical parameters. These include a notable 15.4 % increase in maximum stabbing force, a remarkable 29.5 % augmentation in maximum yarn pull-out force, a 24.3 % boost in maximum yarn tensile strength, and a 204.5 % enhancement in maximum fabric tensile strength. This research underscores the profound impact of synergizing ZIF-8 and SiO 2 within the STF matrix, and significantly improves the protective abilities of SiO 2 -based STF-impregnated Kevlar fabrics, which provides a new route to design STF-impregnated ballistic fabric with high protective performance.
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TALANTA
·
2022
·
IF 6.556
Lili Xiao,Kaixiu Yang,Jiaxing Duan,SiYan Zheng,Jin Jiang
In this work, spherical Ni-based metal-organic frameworks (Ni-MOFs) were used as precursors for preparing nanorod-like nickel phosphate (r-NiPO) with enhanced electro-catalytic properties in detection of glucose. It was found that the addition of nickel ion has a profound effect on construction of nickel phosphate with flower-like, rod-like, and ribbon-like structure in presence of H 2 PO 2 − . The r-NiPO consisted of multiple phases of nickel phosphate showed porous, interconnected structure and abundant active Ni(II)/Ni(III) pairs, which was beneficial to facilitate glucose oxidation. In comparison with Ni-MOF, r-NiPO exhibited the superior electrocatalytic property on oxidation of glucose because of the exposing more active Ni sites in r-NiPO than that of Ni-MOF precursor. r-NiPO modified glassy carbon electrode (r-NiPO/GCE) showed a good linear response to glucose from 1.0 μM to 3.0 mM with a high sensitivity of 3169 μA mM −1 cm −2 . In addition, r-NiPO/GCE can be used to detect glucose in human serum with satisfactory recoveries (90–97%).
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RENEWABLE ENERGY
·
2023
·
IF 8.7
Zhiqiang Zou,Hao Zhou,Lingmei Dai,Dehua Liu,Wei Du
The poor stability of metal-organic frameworks (MOFs) limits their practical applications in many fields. Zeolitic imidazolate frameworks (ZIF-8) has been widely studied as an enzyme immobilization carrier. In this paper, the stability of ZIF-8-immobilized lipase in methanolysis for biodiesel production was studied. Fatty acids as conventional substances involved in lipase-mediated natural acylation were found to destroy the structure of ZIF-8 through ligand exchange mechanism. A new MOF was successfully constructed by using phthalic acid (pKa much smaller than 2-methylimidazole) as the exchange ligand. This novel MOF (abbreviated as LeZIF-8-PA X, X represents reaction hours) had dual stability in water and even in pure oleic acid. Lipase immobilized on LeZIF-8-PA 0.5 showed higher specific activity. FTIR analysis showed that enzyme molecule immobilized on Le-ZIF-8-PA 0.5 had higher conformational flexibility than that with ZIF-8 as the carrier. When applied to methanolysis for biodiesel production, ET 2.0/LeZIF-8-PA 0.5 maintained intact morphology while ET 2.0/ZIF-8 almost lost its original morphology, with enzyme activity of 81.5% and 60.2% retained respectively after 5 batch reactions . This work is anticipated to provide new ideas for constructing stable MOFs and promoting the application of MOFs-immobilized enzymes in many chemical and pharmaceutical industrial processes.
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Materials Chemistry Frontiers
·
2021
·Vol. 5
·期 20
·7617-7627
·
IF 6.482
Zhenhua Chao,Jingyu Li,Wenning Jiang,Chong Zhang,Jiaxin Ji,Xia Hua,Li Xu,Lulu Han,Lingyun Jia
The accumulation of protein-bound uremic toxins (PBUTs) in the blood may result in the development of uremia into advanced stages. However, traditional hemoperfusion absorbents for PBUT removal have the main drawbacks of non-specific adhesion of plasma proteins, lower PBUT adsorption efficiency and poor hemocompatibility. Here, we report a micro–nanostructural design to synthesize a novel hemocompatible hemoperfusion absorbent by combining nanoporous hollow microspheres and PBUT-absorbing nanoparticles. Natural pollen nanoporous hollow microspheres were used as a skeleton to accelerate PBUT adsorption, and the PBUT-absorbing NU-1000 nanoparticles were in situ grown and decorated on the pollen skeleton (PPNU) via the intermediation of a polydopamine layer. Moreover, heparin was modified on the PPNU (PPNUH) to offer excellent hemocompatibility without sacrificing the PBUT-adsorbing sites of NU-1000. PPNUH specifically adsorbed PBUTs and possessed a high maximum adsorption capacity for various PBUTs (282 mg g−1 for p-cresyl sulfate, 329 mg g−1 for indoxyl sulfate, and 188 mg g−1 for quinoline acid). Furthermore, the integration of nanoporous hollow microspheres and PBUT-absorbing nanoparticles permitted quick adsorption of 85% of the free PBUT within 10 s while removing 70% of albumin-bound PBUTs within the first 1 min in simulated hemoperfusion. The exquisite micro–nanostructure of PPNUH and heparin modification synergistically achieved the efficient, rapid, and safe removal of PUBTs, and the design strategy provided a guiding idea for the development of future multifunctional and portable hemoperfusion materials.
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JOURNAL OF FOOD COMPOSITION AND ANALYSIS
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2022
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IF 4.52
Haishuai Peng,Yuanyuan Hui,Meixue Pu,Ding Yang,Aiqing Zhao,Weizhe Wang,Shan Wu,Bini Wang
Streptomycin (STR) residues in dairy products could cause serious health risks for human or affect the quality of the dairy products fermented by lactic acid bacteria , thereby resulting in economic losses. Thus, STR detection methods need to be developed quickly, simply, and sensitively. In this study, polyethyleneimine (PEI)-functionalized NH 2 -MIL-101(Fe) (PEI-Fe-MOF) was characterized and found to exhibit an enhanced electrochemical characteristics, when compared to Fe-MOFs. [email protected] core-shell NPs could further amplify its electrochemical signal. Based on the PEI-Fe-MOF/ [email protected] NPs nanocomposites, we have developed a novel electrochemical aptasensor to detect STR rapidly. When detected under optimal conditions, a wide linear range between 0.1 and 200 nM was observed for the aptasensor with a detection limit of 0.033 nM. Furthermore, the developed aptasensor has been satisfactorily applied for the rapid STR detection in dairy products with recoveries ranging from 98.2% to 110.1%. Therefore, our method can be considered a new effective method for the rapid detection of STR in dairy products.
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FOOD CHEMISTRY
·
2020
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IF 6.306
Xiong-Xin Peng,Guang-Ming Bao,Yu-Fei Zhong,Li Zhang,Kang-Bo Zeng,Jia-Xin He,Wei Xiao,Yi-Fan Xia,Qing Fan,Hou-Qun Yuan
Thiabendazole (TBZ), has been extensively employed as a pesticide and/or a fungicide in agriculture, while its residues would threaten to public health and safety. Simple, rapid and sensitive probes for detection of TBZ in real food samples is significantly desirable. In present work, a highly selective and sensitive luminescent sensor for monitoring TBZ in oranges has been constructed based on a Tb 3+ -functionalized Zr-MOF (Tb 3+ @ 1 ). Tb 3+ @ 1 exhibited many attractive sensing properties toward TBZ, including broad linear range (0–80 μM), high selectivity, low LOD (0.271 μM) and rapid response time (less than1 min). Moreover, the probe was employed to determine TBZ in real orange samples, in which good recoveries from 98.41 to 104.48% were obtained. It only takes 35 min for the whole process of detection TBZ in real orange samples combined with QuEChERS method. Therefore, this work provided a reliable and rapid method for monitoring the TBZ in real orange samples.
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Sustainable Energy & Fuels
·
2019
·Vol. 3
·期 11
·3078-3084
·
IF 4.912
Qinghua Yang,Rongrong Zhang,Wenfeng Wang,Panpan Zhou,Longgang Wang,Tianyun Chen,Huajian Xu,Lei Zheng
Herein, a facile and universal strategy for preparing metal phosphides using metal organic frameworks (MOFs) was designed and a highly efficient hydrogen evolution reaction (HER) catalyst was developed. By employing MIL-101(Fe) as the precursor, through carbonization, in situ reduction and a direct phosphating process in the presence of NaH2PO2, carbon-coated FeP nanoparticles (FeP-NPs/C) with a large specific surface area (114.3 m2 g−1) were successfully synthesized. When applied for HER testing in 0.5 M H2SO4 solution, the catalyst exhibited superior HER activity with an onset overpotential of 23 mV, a Tafel slope of 72 mV dec−1, an exchange current density of 0.925 mA cm−2 and an overpotential of 72 mV at a current density of 10 mA cm−2, which were comparable to or even better than those of most of the catalysts reported so far. Moreover, it exhibited no obvious decay after 1000 cycles in a long-term durability test.
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JOURNAL OF MOLECULAR LIQUIDS
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2022
·
IF 6.633
Haojie Sun,Bo Yu,Xue Pan,Zhicheng Liu
Metal-organic frameworks (MOFs) such as zeolitic imidazolate framework (ZIF) have shown potential in removing various contaminants from water. However, the MOF materials, usually in powder form, suffer from easy aggregation and poor recyclability, limiting their practical applications in water treatments. Here, we have designed leaf-like MOF-decorated electrospun nanofiber membrane as adsorbent to address the problems. More specifically, two dimensional ZIF-L materials were decorated on electrospun polyacrylonitrile nanofibers (NF) using an in-situ growth method. The obtained ZIF-L/NF nanocomposite can efficiently adsorb toxic malachite green and reach a high adsorption capacity of 5103 mg g −1 , attributed to the π-π stacking interactions between the ZIF-L and the dyes. The adsorption process conforms to pseudo-second-order kinetics and Langmuir isotherm model. From thermodynamic analysis, it was found that the adsorption was spontaneous and endothermic. Moreover, the ZIF-L/NF nanocomposite also exhibits excellent recyclability in the adsorption–desorption test.
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ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Qiuchun Dong,Qian Wang,Ziyang Dai,Huajun Qiu,Xiaochen Dong
Developing highly active electrocatalysts with low cost and high efficiency for oxygen evolution reactions (OER) is important for the practical implementations of hydrogen energy. Here, we report a Zn-doped CoSe2 nanosheets grown on free-standing carbon fabric collector (CFC), which was synthesized by using a metal–organic framework (MOF) as precursor and followed by a selenylation process. Importantly, the Zn-doped CoSe2/CFC electrode exhibited an obviously enhanced catalytic activity for OER in 1 M KOH aqueous solution compared with CoSe2/CFC, showing a small overpotential of 356 mV for a current density of 10 mA cm–2, a small Tafel slope of 88 mV dec–1, and an excellent stability. The robust and free-standing electrode shows great potential as an economic catalyst for OER applications.
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CARBOHYDRATE POLYMERS
·
2020
·
IF 7.182
Wanli Lu,Chao Duan,Chaoran Liu,Yanling Zhang,Xin Meng,Lei Dai,Wenliang Wang,Hailong Yu,Yonghao Ni
Membrane technology is one of the most promising technologies for wastewater remedy. However, it remains challenging to prepare high-performance membrane matrix for complex pollutants, e.g. containing both oil and organic dye. In this work, we facilely fabricate a cellulose-fiber-supported MOF photocatalytic membrane, namely Ag@AgCl@MIL-100(Fe)/CCF, which was prepared via carboxymethylation of cotton fabric (CCF) as scaffold and in-situ synthesis of MOF derivative as photocatalyst. The carboxymethylation significantly improves the hydrophilicity of cotton fabric and the deposition amount of MIL-100(Fe). The high hydrophilicity of modified CCF and porous MIL-100(Fe) further enable the membrane with an efficient adsorption capacity of dyes and underwater oleophobicity against oils. The photocatalysts Ag@AgCl nanoparticles anchored onto MIL-100(Fe) promote the photocatalytic activity. As a result, the membrane shows simultaneous high removal efficiency towards dyes (97.3 %) and oils (99.64 %). Additionally, thanks to the good photocatalytic activity against organic pollutants, the membrane exhibits excellent self-cleaning and a long-term reuse capacity.
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