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金属有机骨架微孔复合膜的合成与应用

主讲人:王焕庭

时间:2019年12月17日(星期二)上午10:00

地点:重点实验室五楼报告厅

主讲人先容:

王焕庭教授目前是澳大利亚Monash大学化学工程系教授,澳大利亚工程院院士,任工程学院副院长以及Monash膜创新中心主任。曾获得澳大利亚研究理事会(ARC)QEII Fellowship(2004)、Future Fellowship(2010),英国皇家化学学会会士(2011),美国化学工程师学会会士(2017)以及澳大利亚皇家化学会的R.K. Murphy Medal(2019)。其领导的课题组主要从事高性能膜材料、纳米结构材料的设计与制备及其在环境和能源领域的应用研究,在Nature Materials、Nature Communications、Advanced Materials、Angewandte Chemie International Edition等期刊发表论文390余篇,多次受邀作国际会议特邀学术报告。王焕庭教授现担任ACS旗下化工权威期刊Industrial & Engineering Chemistry Research副主编。

主要内容:

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.


主办单位:材料化学工程国家重点实验室

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