Journal ArticleDOI
Oriented MFI Membranes by Gel-Less Secondary Growth of Sub-100 nm MFI-Nanosheet Seed Layers.
Kumar Varoon Agrawal,Berna Topuz,Tung Cao Thanh Pham,Thanh Huu Nguyen,Nicole Sauer,Neel Rangnekar,Han Zhang,Katabathini Narasimharao,Sulaiman Nasir Basahel,Lorraine F. Francis,Christopher W. Macosko,Shaeel A. Al-Thabaiti,Michael Tsapatsis,Kyung Byung Yoon +13 more
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TLDR
A zeolite membrane fabrication process combining 2D-zeolite nanosheet seeding and gel-free secondary growth is described, which produces selective molecular sieve films that are as thin as 100 nm and exhibit record high permeances for xylene- and butane-isomers.Abstract:
A zeolite membrane fabrication process combining 2D-zeolite nanosheet seeding and gel-free secondary growth is described. This process produces selective molecular sieve films that are as thin as 100 nm and exhibit record high permeances for xylene- and butane-isomers. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.read more
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Two-Dimensional-Material Membranes: A New Family of High-Performance Separation Membranes.
TL;DR: These are the latest ground-breaking studies in 2D-material membranes as nanosheet and laminar membranes, with a focus on starting materials, nanostructures, and transport properties.
Journal ArticleDOI
Zeolite membranes – a review and comparison with MOFs
TL;DR: The latest developments in zeolite membranes are reviewed, with an emphasis on the synthesis techniques, including seed assembly and secondary growth methods, and the latest advancements in MOF and mixed matrix membranes are highlighted.
Journal ArticleDOI
Mixed matrix formulations with MOF molecular sieving for key energy-intensive separations.
Gongping Liu,Gongping Liu,Valeriya Chernikova,Yang Liu,Kuang Zhang,Youssef Belmabkhout,Osama Shekhah,Chen Zhang,Shouliang Yi,Mohamed Eddaoudi,William J. Koros +10 more
TL;DR: Efficient incorporation of engineered submicrometre-sized metal–organic framework (MOF) crystals into polymers to form hybrid materials that successfully translate the excellent molecular sieving properties of face-centred cubic (fcu)-MOFs into the resultant membranes are reported on.
Journal ArticleDOI
Ultra-selective high-flux membranes from directly synthesized zeolite nanosheets
Mi Young Jeon,Donghun Kim,Prashant Kumar,Pyung Soo Lee,Neel Rangnekar,Peng Bai,Meera Shete,Bahman Elyassi,Han Seung Lee,Katabathini Narasimharao,Sulaiman Nasir Basahel,Shaeel A. Al-Thabaiti,Wenqian Xu,Hong Je Cho,Evgenii O. Fetisov,Raghuram Thyagarajan,Robert F. DeJaco,Wei Fan,K. Andre Mkhoyan,J. Ilja Siepmann,Michael Tsapatsis +20 more
TL;DR: A nanocrystal-seeded growth method triggered by a single rotational intergrowth is used to synthesize high-aspect-ratio MFI nanosheets with a thickness of 5 nanometres (2.5 unit cells), which allow the fabrication of thin and defect-free coatings that effectively cover porous substrates.
Journal ArticleDOI
Zeolitic Imidazolate Framework/Graphene Oxide Hybrid Nanosheets as Seeds for the Growth of Ultrathin Molecular Sieving Membranes
TL;DR: This 2D nano-hybrid seeding strategy can be readily extended to the fabrication of other defect-free and ultrathin MOF or zeolite molecular sieving membranes for a wide range of separation applications.
References
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Journal ArticleDOI
Ordered porous materials for emerging applications
TL;DR: The past decade has seen significant advances in the ability to fabricate new porous solids with ordered structures from a wide range of different materials, which has resulted in materials with unusual properties and broadened their application range beyond the traditional use as catalysts and adsorbents.
Journal ArticleDOI
Stable single-unit-cell nanosheets of zeolite MFI as active and long-lived catalysts
Minkee Choi,Kyungsu Na,Jeongnam Kim,Jeongnam Kim,Yasuhiro Sakamoto,Yasuhiro Sakamoto,Osamu Terasaki,Osamu Terasaki,Ryong Ryoo,Ryong Ryoo +9 more
TL;DR: It is shown that appropriately designed bifunctional surfactants can direct the formation of zeolite structures on the mesoporous and microporous length scales simultaneously and thus yield MFI (ZSM-5, one of the most important catalysts in the petrochemical industry) zeolites that are only 2 nm thick, which corresponds to the b-axis dimension of a single MFI unit cell.
Journal ArticleDOI
Microstructural optimization of a zeolite membrane for organic vapor separation.
Zhiping Lai,Griselda Bonilla,Isabel Díaz,José Geraldo Nery,Khristina Sujaoti,Miguel A. Amat,Efrosini Kokkoli,Osamu Terasaki,Robert Thompson,Michael Tsapatsis,Dionisios G. Vlachos +10 more
TL;DR: Comparison with previously reported membranes shows that these microstructurally optimized films have superior performance for the separation of organic mixtures with components that have small differences in size and shape, such as xylene isomers.
Journal ArticleDOI
Structure of synthetic zeolite ZSM-5
TL;DR: In this article, the shape selective catalysts with unique channel structures have been determined using model building, single crystal and powder X-ray data, and they have been shown to possess unusual catalytic properties and high thermal stability.
Journal ArticleDOI
Zeolite membranes – Recent developments and progress
Juergen Caro,Manfred Noack +1 more
TL;DR: The remarkable progress made in the preparation and characterization of zeolite membranes during the last few years has stimulated several industrial R&D projects exploiting the shape-selectivity of ZO membranes in mass separation as mentioned in this paper.
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Ultra-selective high-flux membranes from directly synthesized zeolite nanosheets
Mi Young Jeon,Donghun Kim,Prashant Kumar,Pyung Soo Lee,Neel Rangnekar,Peng Bai,Meera Shete,Bahman Elyassi,Han Seung Lee,Katabathini Narasimharao,Sulaiman Nasir Basahel,Shaeel A. Al-Thabaiti,Wenqian Xu,Hong Je Cho,Evgenii O. Fetisov,Raghuram Thyagarajan,Robert F. DeJaco,Wei Fan,K. Andre Mkhoyan,J. Ilja Siepmann,Michael Tsapatsis +20 more