Growth of ZnO self-converted 2D nanosheet zeolitic imidazolate framework membranes by an ammonia-assisted strategy

Li, Yujia; Lin, Lu; Tu, Min; Nian, Pei; Howarth, Ashlee J.; Farha, Omar K.; Qiu, Jieshan; Zhang, Xiongfu

doi:10.1007/s12274-017-1803-0

Cited by 81 publications

(41 citation statements)

References 49 publications

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“…The H 2 -permselectivities of the composite membrane measured in this study were briefly compared with those recently reported for other membranes composed of various materials systems, and their H 2 permeation data with α(H 2 /X) (X = N 2 (0.364 nm) [ 51 ] or O 2 (0.346 nm) [ 51 ]) measured under the dry condition at T ≤ 50 °C are listed in Table 3 [ 18 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 ]. Among them, novel ultrathin (9 nm thickness) graphene oxide membrane formed on an anodic oxidized alumina support (#09) exhibited a H 2 permeance of approximately 1 × 10 −7 mol m −2 s −1 Pa −1 with α(H 2 /N 2 ) of 900 at 20 °C [ 75 , 76 ].…”

Section: Resultsmentioning

confidence: 99%

Hydrogen Selective SiCH Inorganic–Organic Hybrid/γ-Al2O3 Composite Membranes

et al. 2020

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Solar hydrogen production via the photoelectrochemical water-splitting reaction is attractive as one of the environmental-friendly approaches for producing H2. Since the reaction simultaneously generates H2 and O2, this method requires immediate H2 recovery from the syngas including O2 under high-humidity conditions around 50 °C. In this study, a supported mesoporous γ-Al2O3 membrane was modified with allyl-hydrido-polycarbosilane as a preceramic polymer and subsequently heat-treated in Ar to deliver a ternary SiCH organic–inorganic hybrid/γ-Al2O3 composite membrane. Relations between the polymer/hybrid conversion temperature, hydrophobicity, and H2 affinity of the polymer-derived SiCH hybrids were studied to functionalize the composite membranes as H2-selective under saturated water vapor partial pressure at 50 °C. As a result, the composite membranes synthesized at temperatures as low as 300–500 °C showed a H2 permeance of 1.0–4.3 × 10−7 mol m−2 s−1 Pa−1 with a H2/N2 selectivity of 6.0–11.3 under a mixed H2-N2 (2:1) feed gas flow. Further modification by the 120 °C-melt impregnation of low molecular weight polycarbosilane successfully improved the H2-permselectivity of the 500 °C-synthesized composite membrane by maintaining the H2 permeance combined with improved H2/N2 selectivity as 3.5 × 10−7 mol m−2 s−1 Pa−1 with 36. These results revealed a great potential of the polymer-derived SiCH hybrids as novel hydrophobic membranes for purification of solar hydrogen.

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Section: Resultsmentioning

confidence: 99%

Hydrogen Selective SiCH Inorganic–Organic Hybrid/γ-Al2O3 Composite Membranes

et al. 2020

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“…In fact, thinner nanosheet ZIF membranes could exhibit better H 2 /CO 2 gas separation performance. 19 , 25 Moreover, it is much more challenging to fabricate a defect-free and thin crystalline nanosheet membrane on a tubular substrate than a planar one. Unfortunately, by this strategy, we have not achieved a much thinner nanosheet membrane yet by now.…”

Section: Resultsmentioning

confidence: 99%

“…In our previous study, a 2D ZIF nanosheet membrane was achieved by a self-conversion growth of ZnO nanoparticles (NPs). 25 However, the orientation of the achieved nanosheet membrane is still unsatisfactory, which seriously influences the microstructure and separation performance of the membrane. Moreover, the operation process is rather complicated and the reproducibility of membrane preparation is poor.…”

Section: Introductionmentioning

confidence: 99%

GO-guided direct growth of highly oriented metal–organic framework nanosheet membranes for H₂/CO₂ separation

et al. 2018

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“…This noteworthy performance is attributed probably to the fabrication method, which implicates the strong chemical bonding induced between the support, COF, and MOF, since the COF material can cooperate via imine groups with polyaniline, while in case of the ZIF, the HN-Zn-imidazole bonds could help in sealing the interface with the COF. There has been an increasing interest in two dimensional (2D) MOF nanosheets,, due to their unique properties, such as large surface areas, nanometer-sized cavities, uniform channels, stability, and chemical tunability, which make them potential candidates for applications in membrane gas separations [138,139]. Zhang et al fabricated a highly oriented tubular membrane of Zn2(bIm)4 (bIm = benzimidazole) ZIF nanosheet was fabricated by using the self-conversion of ZnO nanoparticles (NPs), and following a graphene oxide (GO) guided method ( Figure 45) [122].…”

Section: Hydrogen Purification and Recyclingmentioning

confidence: 99%

Metal–Organic Framework Membranes: From Fabrication to Gas Separation

et al. 2018

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Gas membrane-based separation is considered one of the most effective technologies to address energy efficiency and large footprint challenges. Various classes of advanced materials, including polymers, zeolites, porous carbons, and metal–organic frameworks (MOFs) have been investigated as potential suitable candidates for gas membrane-based separations. MOFs possess a uniquely tunable nature in which the pore size and environment can be controlled by connecting metal ions (or metal ion clusters) with organic linkers of various functionalities. This unique characteristic makes them attractive for the fabrication of thin membranes, as both the diffusion and solubility components of permeability can be altered. Numerous studies have been published on the synthesis and applications of MOFs, as well as the fabrication of MOF-based thin films. However, few studies have addressed their gas separation properties for potential applications in membrane-based separation technologies. Here, we present a synopsis of the different types of MOF-based membranes that have been fabricated over the past decade. In this review, we start with a short introduction touching on the gas separation membrane technology. We also shed light on the various techniques developed for the fabrication of MOF as membranes, and the key challenges that still need to be tackled before MOF-based membranes can successfully be used in gas separation and implemented in an industrial setting.

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Growth of ZnO self-converted 2D nanosheet zeolitic imidazolate framework membranes by an ammonia-assisted strategy

Cited by 81 publications

References 49 publications

Hydrogen Selective SiCH Inorganic–Organic Hybrid/γ-Al2O3 Composite Membranes

Hydrogen Selective SiCH Inorganic–Organic Hybrid/γ-Al2O3 Composite Membranes

GO-guided direct growth of highly oriented metal–organic framework nanosheet membranes for H₂/CO₂ separation

Metal–Organic Framework Membranes: From Fabrication to Gas Separation

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Growth of ZnO self-converted 2D nanosheet zeolitic imidazolate framework membranes by an ammonia-assisted strategy

Cited by 81 publications

References 49 publications

Hydrogen Selective SiCH Inorganic–Organic Hybrid/γ-Al2O3 Composite Membranes

Hydrogen Selective SiCH Inorganic–Organic Hybrid/γ-Al2O3 Composite Membranes

GO-guided direct growth of highly oriented metal–organic framework nanosheet membranes for H2/CO2 separation

Metal–Organic Framework Membranes: From Fabrication to Gas Separation

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Product

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GO-guided direct growth of highly oriented metal–organic framework nanosheet membranes for H₂/CO₂ separation