共查询到20条相似文献,搜索用时 15 毫秒
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Ken‐ichi Sawamura Dr. Teruaki Izumi Kiyotoshi Kawasaki Shintaro Daikohara Tetsu Ohsuna Prof. Mitsuko Takada Dr. Yasushi Sekine Prof. Eiichi Kikuchi Prof. Masahiko Matsukata Prof. 《化学:亚洲杂志》2009,4(7):1070-1077
Sort the bigs from the smalls : Reverse‐selective membranes, through which bigger molecules selectively permeate, are attractive for developing chemical processes. A new adsorption‐based reverse‐selective membrane that utilizes a Na cation occluded in a zeolitic framework is presented. The membrane developed enables the selective permeation and separation of bigger polar molecules, such as methanol and water, from hydrogen above 473 K.
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Microporous metal–organic frameworks (MOFs) are comparatively new porous materials. Because the pores within such MOFs can be readily tuned through the interplay of both metal‐containing clusters and organic linkers to induce their size‐selective sieving effects, while the pore surfaces can be straightforwardly functionalized to enforce their different interactions with gas molecules, MOF materials are very promising for gas separation. Furthermore, the high porosities of such materials can enable microporous MOFs with optimized gas separation selectivity and capacity to be targeted. This Focus Review highlights recent significant advances in microporous MOFs for gas separation. 相似文献
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Cover Picture: Open‐Pore Two‐Dimensional MFI Zeolite Nanosheets for the Fabrication of Hydrocarbon‐Isomer‐Selective Membranes on Porous Polymer Supports (Angew. Chem. Int. Ed. 25/2016) 下载免费PDF全文
Han Zhang Prof. Qiang Xiao Prof. Xianghai Guo Prof. Najun Li Prashant Kumar Neel Rangnekar Mi Young Jeon Prof. Shaeel Al‐Thabaiti Prof. Katabathini Narasimharao Prof. Sulaiman Nasir Basahel Prof. Berna Topuz Frank J. Onorato Prof. Christopher W. Macosko Prof. K. Andre Mkhoyan Prof. Michael Tsapatsis 《Angewandte Chemie (International ed. in English)》2016,55(25):7009-7009
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Since the discovery of graphene and its derivatives, the development and application of two‐dimensional (2D) materials have attracted enormous attention. 2D microporous materials, such as metal‐organic frameworks (MOFs), covalent organic frameworks (COFs), graphitic carbon nitride (g‐C3N4) and so on, hold great potential to be used in gas separation membranes because of their high aspect ratio and homogeneously distributed nanometer pores, which are beneficial for improving gas permeability and selectivity. This review briefly summarizes the recent design and fabrication of 2D microporous materials, as well as their applications in mixed matrix membranes (MMMs) for gas separation. The enhanced separation performances of the membranes and their long‐term stability are also introduced. Challenges and the latest development of newly synthesized 2D microporous materials are finally discussed to foresee the potential opportunities for 2D microporous material‐based MMMs. 相似文献
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In situ Generation of Reticulate Micropores through Covalent Network/Polymer Nanocomposite Membranes for Reverse‐Selective Separation of Carbon Dioxide 下载免费PDF全文
Eunkyung Jeon Dr. Su‐Young Moon Jae‐Sung Bae Prof. Ji‐Woong Park 《Angewandte Chemie (International ed. in English)》2016,55(4):1318-1323
We demonstrate the synthesis of a microporous covalent‐network membrane derived from co‐continuous blends of a porogenic urea network and a polyimide (PI). We show that the urea networks in the PI matrix may be thermally rearranged while selectively expelling small molecular fragments, thereby forming a new network bearing reticular microporous molecular pathways. The porous structures enable reverse‐selective gas separation, efficiently blocking carbon dioxide to which most polymeric membranes exhibit selective permeability. The proposed method for fabricating microporous organic membranes with highly tunable porosities using a variety of chemical structures and processing parameters is facile and shows promise for the creation of new membrane‐based molecular‐separation techniques. 相似文献
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Chemically Stable Covalent Organic Framework (COF)‐Polybenzimidazole Hybrid Membranes: Enhanced Gas Separation through Pore Modulation 下载免费PDF全文
Bishnu P. Biswal Harshal D. Chaudhari Prof. Dr. Rahul Banerjee Prof. Dr. Ulhas K. Kharul 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(14):4695-4699
Highly flexible, TpPa‐1@PBI‐BuI and TpBD@PBI‐BuI hybrid membranes based on chemically stable covalent organic frameworks (COFs) could be obtained with the polymer. The loading obtained was substantially higher (50 %) than generally observed with MOFs. These hybrid membranes show an exciting enhancement in permeability (about sevenfold) with appreciable separation factors for CO2/N2 and CO2/CH4. Further, we found that with COF pore modulation, the gas permeability can be systematically enhanced. 相似文献
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Cover Picture: para‐Xylene Ultra‐selective Zeolite MFI Membranes Fabricated from Nanosheet Monolayers at the Air–Water Interface (Angew. Chem. Int. Ed. 2/2018) 下载免费PDF全文
Dr. Donghun Kim Mi Young Jeon Prof. Benjamin L. Stottrup Prof. Michael Tsapatsis 《Angewandte Chemie (International ed. in English)》2018,57(2):361-361
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Dr. Ceri Hammond Dr. Robert L. Jenkins Dr. Nikolaos Dimitratos Dr. Jose Antonio Lopez‐Sanchez Dr. Mohd Hasbi ab Rahim Dr. Michael M. Forde Adam Thetford Dr. Damien M. Murphy Dr. Henk Hagen Dr. Eric E. Stangland Prof. Jacob M. Moulijn Dr. Stuart H. Taylor Dr. David J. Willock Prof. Graham J. Hutchings 《Chemistry (Weinheim an der Bergstrasse, Germany)》2012,18(49):15557-15557
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Inside Back Cover: Facile Synthesis,Characterization, and Catalytic Behavior of a Large‐Pore Zeolite with the IWV Framework (Chem. Eur. J. 12/2016) 下载免费PDF全文
Dr. Joel E. Schmidt Dr. Cong‐Yan Chen Stephen K. Brand Dr. Stacey I. Zones Prof. Mark E. Davis 《Chemistry (Weinheim an der Bergstrasse, Germany)》2016,22(12):4295-4295