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[Nature Mater] MOFs 納米片用于氣體小分子分離 已有1人參與
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Title: Metal–organic framework nanosheets in polymer composite materials for gas separation Authors: Tania Rodenas, Ignacio Luz, Gonzalo Prieto, Beatriz Seoane,Hozanna Miro,Avelino Corma,Freek Kapteijn,Francesc X. Llabrés i Xamena & Jorge Gascon Abstract: Composites incorporating two-dimensional nanostructures within polymeric matrices have potential as functional components for several technologies, including gas separation. Prospectively, employing metal–organic frameworks (MOFs) as versatile nanofillers would notably broaden the scope of functionalities. However, synthesizing MOFs in the form of freestanding nanosheets has proved challenging. We present a bottom-up synthesis strategy for dispersible copper 1,4-benzenedicarboxylate MOF lamellae of micrometre lateral dimensions and nanometre thickness. Incorporating MOF nanosheets into polymer matrices endows the resultant composites with outstanding CO2 separation performance from CO2/CH4 gas mixtures, together with an unusual and highly desired increase in the separation selectivity with pressure. As revealed by tomographic focused ion beam scanning electron microscopy, the unique separation behaviour stems from a superior occupation of the membrane cross-section by the MOF nanosheets as compared with isotropic crystals, which improves the efficiency of molecular discrimination and eliminates unselective permeation pathways. This approach opens the door to ultrathin MOF–polymer composites for various applications. link: http://www.nature.com/nmat/journal/v14/n1/full/nmat4113.html Fulltext:最近的MOFs單層納米膜作為氣體分離的相關(guān)研究很熱啊...不過話說回來分離作為多孔材料不褪色的應(yīng)用也是著實(shí)讓我們驚喜了一把...另外附上近期大化所楊老師的文章 http://www.sciencemag.org/content/346/6215/1356.full [ Last edited by liwentao2010 on 2014-12-30 at 21:45 ] |

木蟲 (小有名氣)
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