學術活動   NAVIGATION

金屬有機骨架微孔復合膜的合成與應用

主講人:王煥庭

時間:2019年12月17日(星期二)上午10:00

地點:重點實驗室五樓報告廳

主講人介紹:

王煥庭教授目前是澳大利亞Monash大學化學工程系教授,澳大利亞工程院院士,任工程學院副院長以及Monash膜創新中心主任。曾獲得澳大利亞研究理事會(ARC)QEII Fellowship(2004)、Future Fellowship(2010),英國皇家化學學會會士(2011),美國化學工程師學會會士(2017)以及澳大利亞皇家化學會的R.K. Murphy Medal(2019)。其領導的課題組主要從事高性能膜材料、納米結構材料的設計與制備及其在環境和能源領域的應用研究,在Nature Materials、Nature Communications、Advanced Materials、Angewandte Chemie International Edition等期刊發表論文390余篇,多次受邀作國際會議特邀學術報告。王煥庭教授現擔任ACS旗下化工權威期刊Industrial & Engineering Chemistry Research副主編。

主要內容:

Metal–organic framework (MOF)-based membranes have shown attractive ion separation properties. To investigate ion selective transport mechanisms and develop membranes for potential applications, new strategies are needed to achieve ultrathin and defect-free MOF membranes with tailorable functionality. We have recently developed new seeding methods for fabricating ultrathin and high-quality molecular sieving membranes on various porous substrates. For instance, hybrid MOF nanosheets are formed by growing MOF nanocrystals on both sides of 2D graphene oxide nanosheets. These flexible, micro-sized hybrid nanosheets allow for seeding substrates with large-pores and rough surface, eliminating substrate modification required in the conventional synthesis using nanocrystal seeds. We have further developed a novel nanocrystal-mask plasma etching method for synthesizing MOF/mesoporous GO (MOF/MGO) hybrid nanosheets. Due to their ultrathin thickness and well-aligned MGO nanosheets, this hierarchical structural MOF/MGO membrane is suitable for studying ion transport and selection. We have discovered that such membranes have fast, selective ion permeation properties and demonstrated selective transport of various cations and anions in MOF-based membranes. The ZIF-8 and zirconium-based UiO-66 membranes showed a LiCl/RbCl selectivity of ~4.6 and ~1.8, respectively. UiO-66-X (X = H, NH2, and N+(CH3)3) exhibited ultrahigh F? conductivity up to ~10 S ··m?1, and ultrahigh F?/Cl? selectivity, from ~13 to ~240. Our studies open up a new avenue to develop a unique MOF membrane platform for efficient ion separations.


主辦單位:材料化學工程國家重點實驗室

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