Photo-switchable smart metal–organic framework membranes with tunable and enhanced molecular sieving performance

2018 ◽  
Vol 6 (48) ◽  
pp. 24949-24955 ◽  
Author(s):  
Chuanyao Liu ◽  
Yunzhe Jiang ◽  
Chen Zhou ◽  
Jürgen Caro ◽  
Aisheng Huang
Keyword(s):  
Separation Factor ◽  
Metal Organic Framework ◽  
Metal Organic ◽  
Molecular Sieving ◽  
Organic Framework

A novel photo-switchable Cu(AzDC)(4,4′-BPE)0.5 membrane was developed with the H2/CO2 separation factor being switched reversibly between 21.3 and 43.7 after irradiation with Vis light (455 nm) and UV (365 nm).

Metal-organic framework nanosheets as building blocks for molecular sieving membranes

Science ◽  
2014 ◽  
Vol 346 (6215) ◽  
pp. 1356-1359 ◽  
Author(s):  
Y. Peng ◽  
Y. Li ◽  
Y. Ban ◽  
H. Jin ◽  
W. Jiao ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Building Blocks ◽  
Metal Organic ◽  
Molecular Sieving ◽  
Organic Framework

Interfacial microfluidic processing of metal-organic framework hollow fiber membranes

Science ◽  
2014 ◽  
Vol 345 (6192) ◽  
pp. 72-75 ◽  
Author(s):  
Andrew J. Brown ◽  
Nicholas A. Brunelli ◽  
Kiwon Eum ◽  
Fereshteh Rashidi ◽  
J. R. Johnson ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Hollow Fibers ◽  
Membrane Fabrication ◽  
Separation Factors ◽  
Metal Organic ◽  
Membrane Defects ◽  
Molecular Sieving ◽  
Positional Control ◽  
Organic Framework

Molecular sieving metal-organic framework (MOF) membranes have great potential for energy-efficient chemical separations, but a major hurdle is the lack of a scalable and inexpensive membrane fabrication mechanism. We describe a route for processing MOF membranes in polymeric hollow fibers, combining a two-solvent interfacial approach for positional control over membrane formation (at inner and outer surfaces, or in the bulk, of the fibers), a microfluidic approach to replenishment or recycling of reactants, and an in situ module for membrane fabrication and permeation. We fabricated continuous molecular sieving ZIF-8 membranes in single and multiple poly(amide-imide) hollow fibers, with H2/C3H8 and C3H6/C3H8 separation factors as high as 370 and 12, respectively. We also demonstrate positional control of the ZIF-8 films and characterize the contributions of membrane defects and lumen bypass.

Efficient SO2 Removal Using a Microporous Metal–Organic Framework with Molecular Sieving Effect

2019 ◽  
Vol 59 (2) ◽  
pp. 874-882 ◽  
Author(s):  
Yan Zhang ◽  
Zhonghang Chen ◽  
Xing Liu ◽  
Ze Dong ◽  
Peixin Zhang ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
So2 Removal ◽  
Metal Organic ◽  
Molecular Sieving ◽  
Sieving Effect ◽  
Organic Framework

scholarly journals Paralyzed membrane: Current-driven synthesis of a metal-organic framework with sharpened propene/propane separation

2018 ◽  
Vol 4 (10) ◽  
pp. eaau1393 ◽  
Author(s):  
Sheng Zhou ◽  
Yanying Wei ◽  
Libo Li ◽  
Yifan Duan ◽  
Qianqian Hou ◽  
...  
Keyword(s):  
Large Scale ◽  
Metal Organic Framework ◽  
Great Promise ◽  
Cubic Phase ◽  
Membrane Composition ◽  
Zeolitic Imidazolate Framework ◽  
Metal Organic ◽  
Dynamics Simulations ◽  
Molecular Sieving ◽  
Organic Framework

Metal-organic framework (MOF) membranes show great promise for propene/propane separation, yet a sharp molecular sieving has not been achieved due to their inherent linker mobility. Here, zeolitic imidazolate framework ZIF-8–type membranes with suppressed linker mobility are prepared by a fast current–driven synthesis (FCDS) strategy within 20 min, showing sharpened molecular sieving for propene/propane separation with a separation factor above 300. During membrane synthesis, the direct current promotes the metal ions and ligands to assemble into inborn-distorted and stiffer frameworks with ZIF-8_Cm (a newly discovered polymorph of ZIF-8) accounting for 60 to 70% of the membrane composition. Molecular dynamics simulations further verify that ZIF-8_Cm is superior to ZIF-8_I 4¯3m (the common cubic phase) for propene/propane separation. FCDS holds great potential to produce high-quality, ultrathin MOF membranes on a large scale.

A Pt/Al2O3-supported metal–organic framework film as the size-selective core–shell hydrogenation catalyst

2016 ◽  
Vol 52 (44) ◽  
pp. 7161-7163 ◽  
Author(s):  
Sonia Aguado ◽  
Sawsan El-Jamal ◽  
Frederic Meunier ◽  
Jerome Canivet ◽  
David Farrusseng
Keyword(s):  
Metal Organic Framework ◽  
Hydrogenation Catalyst ◽  
Homogeneous Layer ◽  
Core Shell ◽  
Double Bonds ◽  
Metal Organic ◽  
Molecular Sieving ◽  
Pt Catalyzed ◽  
Organic Framework ◽  
Supported Metal

The substituted imidazolate-based MOF (SIM-1) easily forms a homogeneous layer at the surface of millimetric platinum-loaded alumina beads. This new core–shell SIM-1@Pt/Al2O3 catalyst shows the fine molecular sieving effect for the Pt-catalyzed hydrogenation of carbon–carbon double bonds.

scholarly journals A zirconium squarate metal–organic framework with modulator-dependent molecular sieving properties

2014 ◽  
Vol 50 (70) ◽  
pp. 10055-10058 ◽  
Author(s):  
Bart Bueken ◽  
Helge Reinsch ◽  
Nele Reimer ◽  
Ivo Stassen ◽  
Frederik Vermoortele ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Squaric Acid ◽  
Metal Organic ◽  
Zirconium Metal ◽  
Molecular Sieving ◽  
Organic Framework

The guest uptake properties of a new squaric acid based zirconium metal–organic framework depend on the modulator used during synthesis.

Molecular sieving of acetylene from ethylene in a rigid ultramicroporous metal organic framework

2021 ◽  
Author(s):  
KaiJie Chen ◽  
Xue Jiang ◽  
Tony Pham ◽  
Jian-Wei Cao ◽  
Katherine A. Forrest ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Metal Organic ◽  
Molecular Sieving ◽  
Organic Framework

scholarly journals Hydrogen Separation Performance of UiO-66-NH2 Membranes Grown via Liquid-Phase Epitaxy Layer-by-Layer Deposition and One-Pot Synthesis

Membranes ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 735
Author(s):  
Alessandro Micero ◽  
Tawheed Hashem ◽  
Hartmut Gliemann ◽  
Aline Léon
Keyword(s):  
Separation Factor ◽  
Metal Organic Framework ◽  
International Standards ◽  
Separation Performance ◽  
Layer By Layer ◽  
Hydrogen Fuel ◽  
Equimolar Ratio ◽  
One Pot ◽  
Metal Organic ◽  
Organic Framework

The quality assurance of hydrogen fuel for mobile applications is assessed by the guidelines and directives given in the European and international standards. However, the presence of impurities in the hydrogen fuel, in particular nitrogen, water, and oxygen, is experienced in several refueling stations. Within this work, metal-organic framework (MOF)-based membranes are investigated as a fine-purification stage of the hydrogen fuel. Three H2/N2 concentrations have been used to analyze the separation factor of UiO-66-NH2 membranes prepared using the layer-by-layer (LBL) and the one-pot (OP) synthesis methods. It is shown that the separation factor for an equimolar ratio is 14.4% higher for the LBL sample compared to the OP membrane, suggesting a higher orientation and continuity of the LBL surface-supported metal-organic framework (SURMOF). Using an equimolar ratio of H2/N2, it is shown that selective separation of hydrogen over nitrogen occurs with a separation factor of 3.02 and 2.64 for the SURMOF and MOF membrane, respectively. To the best of our knowledge, this is the highest reported performance for a single-phase UiO-66-NH2 membrane. For higher hydrogen concentrations, the separation factor decreases due to reduced interactions between pore walls and N2 molecules.

Molecular Sieving Mechanism of Polysulfide-Blocking Metal-Organic Framework Separator for Lithium-Sulfur Batteries

2021 ◽  
Author(s):  
Taegon Jeon ◽  
Sung Chul Jung
Keyword(s):  
Metal Organic Framework ◽  
Critical Issue ◽  
Shuttle Effect ◽  
Practical Applications ◽  
Lithium Sulfur Batteries ◽  
Metal Organic ◽  
Molecular Sieving ◽  
Lithium Sulfur ◽  
Organic Framework

Development of functional separators that block the migration of lithium polysulfides (LPSs) is an efficient way to suppress the shuttle effect, a critical issue restricting the practical applications of lithium–sulfur...

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