Synthesis of stable UiO-66 membranes for pervaporation separation of methanol/methyl tert-butyl ether mixtures by secondary growth

Wu, Feichao; Lin, Lu; Liu, Haiou; Wang, Huanting; Qiu, Jieshan; Zhang, Xiongfu

doi:10.1016/j.memsci.2017.09.047

Cited by 76 publications

(33 citation statements)

References 63 publications

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“…Continuous growth of UiO-66 results in either a polycrystalline or an epitaxial film. As free-standing films were not mechanically robust, porous and nonporous substrates were employed to support UiO-66 membranes [28,59,[86][87][88][89][90][91][92][93][94][95][96] and films [96,[99][100][101][102][103][104][105][106][107][108][109][110][111][112], respectively. Porous metal and ceramic substrates with minimal permeation resistance in the configuration of flat sheets and tubes were adopted for supporting UiO-66 membranes.…”

Section: Approaches For Fabricating Uio-66 Membranesmentioning

confidence: 99%

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Metal-organic framework UiO-66 membranes

Liu

2019

Front. Chem. Sci. Eng.

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Metal-organic frameworks (MOFs) have emerged as a class of promising membrane materials. UiO-66 is a prototypical and stable MOF material with a number of analogues. In this article, we review five approaches for fabricating UiO-66 polycrystalline membranes including in situ synthesis, secondary synthesis, biphase synthesis, gas-phase deposition and electrochemical deposition, as well as their applications in gas separation, pervaporation, nanofiltration and ion separation. On this basis, we propose possible methods for scalable synthesis of UiO-66 membranes and their potential separation applications in the future.

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Section: Approaches For Fabricating Uio-66 Membranesmentioning

confidence: 99%

“…UiO-66 membranes were further developed by using modulated synthesis [59,[90][91][92][93][94][95][96]. The so-called coordination modulation method was initially proposed by Tsuruoka et al [97] and employed in UiO-66 crystal preparation by Schaate et al [98].…”

Section: Introductionmentioning

confidence: 99%

Metal-organic framework UiO-66 membranes

Liu

2019

Front. Chem. Sci. Eng.

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“…In our recent publication, a novel strategy was proposed to form an MOF-based composite membrane for nanofiltration [27], in which a suspension of UiO-66 nanoparticles as one of the most stable frameworks in water [28,29,30] was deposited onto a regenerated cellulose (RC) support via suction filtration. The nanoparticles were filled in the pore network or loaded on the external surface of the support membrane to form a selective layer.…”

Section: Introductionmentioning

confidence: 99%

Design of a Semi-Continuous Selective Layer Based on Deposition of UiO-66 Nanoparticles for Nanofiltration

et al. 2018

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Deposition of UiO-66 metal–organic framework nanoparticles onto a porous polymer support is a promising approach to designing highly-permeable, size-selective, flexible, and stable membranes for water filtration. In this article, a series of UiO-66 nanoparticles having different particle sizes were synthesized and employed to prepare UiO-66-deposited composite membranes. It was found that the size of the UiO-66 nanoparticles had great influences on the performance of the composite membranes for the filtration of a methylene blue aqueous solution. The deposition of smaller nanoparticles afforded a selective layer having a greater external surface area and narrower interparticle voids. These features made the deposition of smaller nanoparticles more advantageous in terms of the flux and rejection, while the deposition of greater nanoparticles afforded a selective layer more tolerant for fouling. Bimodal composite membranes were prepared by depositing mixed UiO-66 nanoparticles of smaller and bigger sizes. These membranes successfully combined the advantages of nanoparticles of a distinct size.

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“…The seeding of U-S(X) integrated with the substrate closely because the coordination bonds between the carboxylate oxygens and aluminum atoms from substrate were constructed, which favored the nucleation and growth of U-S(X) on the alumina substrate [14,20,34]. The U-S(X) layers are 300-800 nm in thickness, substantially thinner than most of the UiO-type membranes reported so far [6,7,20,35]. However, decoration level (density of the grown U-S(X) leaves) of U-SM(X)s varies with the addition of sulfonic acid group; surface coverage of "leaves" becomes sparse.…”

Section: Characterization Of Uio-66-so 3 H Membranesmentioning

confidence: 97%

“…Metal-organic frameworks (MOFs) are famous potential candidates in membrane-integrated separation processes due to their angstrom-sized pores [1][2][3]. Previously, MOF membranes have shown successful use in gas separation [4,5], pervaporation [6,7], organic solvent nanofiltration [8], and dye separation [9,10]. However, effectual use of the MOFs in extracting valuable metal cations from salt lakes and seawater is still a problem, which urges membrane scientists to find a proper answer.…”

Section: Introductionmentioning

confidence: 99%

Engineering Leaf-Like UiO-66-SO3H Membranes for Selective Transport of Cations

Shehzad

Wang

et al. 2020

Nano-Micro Lett.

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HIGHLIGHTS • Ultrathin (< 600 nm) and defect-free leaf-like UiO-66-SO 3 H membranes were fabricated via in situ smart growth. • The sulfonated angstrom-sized ion transport channels in the membranes could accelerate the cation permeation (~ 3× faster than nonfunctionalized UiO-66 membrane) and achieve a high ion selectivity (Na + /Mg 2+ > 140). ABSTRACT Metal-organic frameworks (MOFs) with angstrom-sized pores are promising functional nanomaterials for the fabrication of cation permselective membranes (MOF-CPMs). However, only a few research reports show successful preparation of the MOF-CPMs with good cation separation performance due to several inherent problems in MOFs, such as arduous selfassembly, poor water resistance, and tedious fabrication strategies. Besides, low cation permeation flux due to the absence of the cation permeation assisting functionalities in MOFs is another big issue, which limits their widespread use in membrane technology. Therefore, it is necessary to fabricate functional MOF-CPMs using simplistic strategies to improve cation permeation. In this context, we report a facile in situ smart growth strategy to successfully produce ultrathin (< 600 nm) and leaflike UiO-66-SO 3 H membranes at the surface of anodic alumina oxide. The physicochemical characterizations confirm that sulfonated angstrom-sized ion transport channels exist in the as-prepared UiO-66-SO 3 H membranes, which accelerate the cation permeation (~ 3× faster than non-functionalized UiO-66 membrane) and achieve a high ion selectivity (Na + /Mg 2+ > 140). The outstanding cation separation performance validates the importance of introducing sulfonic acid groups in MOF-CPMs.

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Synthesis of stable UiO-66 membranes for pervaporation separation of methanol/methyl tert-butyl ether mixtures by secondary growth

Cited by 76 publications

References 63 publications

Metal-organic framework UiO-66 membranes

Metal-organic framework UiO-66 membranes

Design of a Semi-Continuous Selective Layer Based on Deposition of UiO-66 Nanoparticles for Nanofiltration

Engineering Leaf-Like UiO-66-SO3H Membranes for Selective Transport of Cations

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