Bimetallic metal-organic frameworks nanocages as multi-functional fillers for water-selective membranes

Cheng, Xuanxuan; Jiang, Zhongyi; Cheng, Xiaoman; Guo, Song; Tang, Lei; Yang, Hao; Wu, Hong; Pan, Fusheng; Zhang, Peng; Cao, Xingzhong; Wang, Boyu

doi:10.1016/j.memsci.2017.09.056

Cited by 47 publications

(27 citation statements)

References 48 publications

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“…To improve physicochemical and transport properties of the SA membranes, various efforts are applied by cross-linking of the membranes [19,21,22], chemical modifications [5], blending with other polymers [14,[23][24][25], and the development of mixed matrix membranes (MMMs) (the formation of organic-inorganic composites). Modifiers such as metal oxides [21,[26][27][28], attapulgite nanorods [19], covalent organic frameworks [29,30], glycogen [22], zeolites [18,31], metal-organic frameworks [20,[32][33][34][35], etc. have been used to develop hybrid SA membranes.…”

Section: Introductionmentioning

confidence: 99%

Novel Mixed Matrix Sodium Alginate–Fullerenol Membranes: Development, Characterization, and Study in Pervaporation Dehydration of Isopropanol

et al. 2020

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Novel mixed matrix dense and supported membranes based on biopolymer sodium alginate (SA) modified by fullerenol were developed. Two kinds of SA–fullerenol membranes were investigated: untreated and cross-linked by immersing the dry membranes in 1.25 wt % calcium chloride (CaCl2) in water for 10 min. The structural and physicochemical characteristics features of the SA–fullerenol composite were investigated by Fourier-transform infrared (FTIR) and nuclear magnetic resonance (NMR) spectroscopic methods, scanning electron (SEM) and atomic force (AFM) microscopies, thermogravimetric analysis (TGA), and swelling experiments. Transport properties were evaluated in pervaporation dehydration of isopropanol in a wide concentration range. It was found that the developed supported cross-linked SA-5/PANCaCl2 membrane (modified by 5 wt % fullerenol) possessed the best transport properties (the highest permeation fluxes 0.64–2.9 kg/(m2 h) and separation factors 26–73,326) for the pervaporation separation of the water–isopropanol mixture in the wide concentration range (12–90 wt % water) at 22 °C and is suitable for the promising application in industry.

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Section: Introductionmentioning

confidence: 99%

Novel Mixed Matrix Sodium Alginate–Fullerenol Membranes: Development, Characterization, and Study in Pervaporation Dehydration of Isopropanol

et al. 2020

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“…To date, several bi‐metallic MOF (or hetero‐metallic MOF) were reported for gas adsorption, catalysis, and proton conduction . Integration of two different metals into the framework forms hetero‐metallic MOF, which provides the MOF with new functionalities .…”

Section: Introductionmentioning

confidence: 99%

“…30 To date, several bi-metallic MOF (or hetero-metallic MOF) were reported for gas adsorption, catalysis, and proton conduction. [31][32][33][34] Integration of two different metals into the framework forms hetero-metallic MOF, which provides the MOF with new functionalities. 35 Zhai et al prepared the hetero-metallic proton-conducting MOF based on Indium-chromium metal by using 4,5-dicarboxylate as a linker.…”

Section: Introductionmentioning

confidence: 99%

Improving the performance of sulfonated polymer membrane by using sulfonic acid functionalized hetero‐metallic metal‐organic framework for DMFC applications

et al. 2019

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Summary Proton transport played a crucial part in the fuel cells, sensors, and batteries. The electrolyte used in fuel cells should possess high proton conductivity and good chemical stability. Herein, taking advantage of the high proton conductivity of metal‐organic framework (MOF) and the good chemical stability of branched polymers, a new heterometallic mediated MOF (Zr‐Cr‐SO3H) is synthesized and utilized as a filler in the highly branched sulfonated polymer (BSP). In addition, Zr‐SO3H MOF is also prepared for comparison. Transmission electron microscope study shows that the prepared MOF particles are spherical in size and interconnected through nanosheets. The optimized quantity of MOFs inside the polymer matrix improves the water sorption, mechanical property, and proton conductivity. The composite membranes display an improved open‐circuit voltage than the pristine BSP membrane. By comparing the Zr‐SO3H MOF incorporated composite membrane, Zr‐Cr‐SO3H MOF incorporated composite membranes display higher proton conductivity and peak power density in a single‐cell test. In particular, the single‐cell fabricated with Zr‐Cr‐SO3H MOF incorporated composite membrane is able to reach the peak power density of 64.6 mWcm−2 at 60°C, which is 26% greater than the Nafion 212 membrane. Furthermore, this work offers a new strategy for the utilization of hetero‐metal MOF as a filler for proton exchange membrane applications.

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“…Compared with traditional distillation separation process, pervaporation has demonstrated advantages of relatively simple and convenient operation, environmental benignity and low energy consumption, especially in separating azeotropic mixtures and purifying heat-sensitive hazardous compounds [1][2][3]. Recently, many regulation strategies were attempted to enhance the PV membrane selectivity and promote permeation flux at the same time, such as exploiting new membrane materials [4], designing suitable membrane structures [5] and introducing novel nanofillers into polymer matrix [6,7]. Compared with mixed matrix membranes, PV composite membranes commonly consist of a porous substrate and an ultra-thin selective layer.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Dehydration Performance of Isopropanol by Introducing Intermediate Layer into Sodium Alginate Nanofibrous Composite Pervaporation Membrane

Cheng

Shen

et al. 2019

Adv. Fiber Mater.

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A novel three-tier composite membrane based on highly porous nanofibrous substrate was demonstrated for efficient isopropanol dehydration by pervaporation. Here, polyethyleneimine (PEI) modified graphene oxide (GO) sheets were vacuumassistant assembled onto porous electrospun polyacrylonitrile (PAN) nanofibrous substrate to achieve a smooth, hydrophilic and compact PEI-GO intermediate layer. The introduction of PEI chains endowed GO interlayer with sufficient interaction for bonding adjacent GO nanosheets to enhance stability in water/isopropanol mixture and also with the ascended interlamellar space to improve the water-sorption ability due to the abundant active amino groups. Benefiting from PEI-GO layer, a defect-free sodium alginate (SA) skin layer could be facilely manufactured with elaborately controlled thickness as thin as possible in order to reduce mass transfer resistant and enhance permeability maximally. Meanwhile, the interlayer would also contribute to enhance interfacial adhesion to promote the structure integrity of three-tier thin-film nanofibrous composite (TFNC) membrane in pervaporation dehydration process. After fine-tuning of membrane preparation process, the SA/PEI(75)-GO-60/PAN TFNC membrane exhibited competitive pervaporation performance with the permeate flux of 2009 g/m 2 h and the separation factor of 1276 operated at 70 °C for dehydration of 90 wt% isopropanol solution. The unique three-tier composite membrane structure suggested an effective and facile approach to design novel membrane structure for further improvement of pervaporation performance.

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Bimetallic metal-organic frameworks nanocages as multi-functional fillers for water-selective membranes

Cited by 47 publications

References 48 publications

Novel Mixed Matrix Sodium Alginate–Fullerenol Membranes: Development, Characterization, and Study in Pervaporation Dehydration of Isopropanol

Novel Mixed Matrix Sodium Alginate–Fullerenol Membranes: Development, Characterization, and Study in Pervaporation Dehydration of Isopropanol

Improving the performance of sulfonated polymer membrane by using sulfonic acid functionalized hetero‐metallic metal‐organic framework for DMFC applications

Enhancing Dehydration Performance of Isopropanol by Introducing Intermediate Layer into Sodium Alginate Nanofibrous Composite Pervaporation Membrane

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