School of Materials Science and Engineering,
Nanyang Technological University, Singapore
题目：Preparation and Applications of Nanoparticle/Metal-Organic Framework Composites
地点：909号楼一楼B会议室(Conference Room B, 909-1F)
Metal-organic frameworks (MOFs)are microporous materials synthesized through assembling metal ions with organic ligands. MOFs have crystalline structures and are typically characterized by large internal surface areas, uniform but tunable cavities, and tailorable chemistry. MOFs have shown great promise for a variety of applications, including gas storage, chemical separation, catalysis and sensing. Particularly, the incorporation of nanoparticles in MOFs has attracted great attention because of the benefits of the novel chemical and physical properties exhibited by certain classes of nanoparticles. Although many reports on nanoparticle/MOF composites and their applications appeared, this emerging area is characterized by significant challenges. Recently, we developed an encapsulation strategy that allows any of several types of nanoparticles to be fully incorporated within crystals of a readily synthesized zeolitic imidazolate framework material, ZIF-8, in a well-dispersed fashion. In contrast to previous reports in which nanoparticles were used as seeds to induce the nucleation of MOF crystals, our strategy relies on the successive adsorption of nanoparticles onto the continuously forming surfaces of the growing MOF crystals. This allows ready control over the spatial distribution of nanoparticles within ZIF-8 crystals by adjusting the time of nanoparticle addition during the MOF-formation reaction. The as-prepared hybrid materials exhibit both active (catalytic, magnetic, and optical) properties deriving from the incorporated nanoparticles and size- and alignment-selective behavior (i.e., molecular sieving and regioselective guest reactivity) originating from the well-defined microporous nature of the MOF component.
Dr. HUO Fengwei is an Assistant Professor in the School of Materials Science and Engineering at Nanyang Technological University. He obtained his B.S. degree in Chemistry, at Jilin University in 1999. He then continued his master research there, supervised by Prof. Xi Zhang. In 2003, he joined Prof. Chad A. Mirkin’s group for his PhD study in chemistry at Northwestern University and obtained PhD degree in 2009. The current research of Dr. Huo’s group involves nanolithography, metallic-organic frameworks (MOFs) materials and catalysis study. He is the author of over thirty publications, including Science, Nature Nanotechnology, Nature Chemistry, Advanced Materials, and Proceedings of the National Academy of Sciences.
1. Lu, G.; Li, S.; Guo, Z.; Farha, O. K.; Hauser, B. G.; Qi, X.; Wang, Y.; Wang, X.; Han, S.; Liu, X.; DuChene, J. S.; Zhang, H.; Zhang, Q.; Chen, X.; Ma, J.; Joachim Loo, S. C.; Wei, D. W.; Yang, Y.; Hupp, J. T.*; Huo, F.* Nature Chemistry 2012, 4, 310-316.
2. Huo, F.; Zheng, G.; Liao, X.; Giam, L. R.; Chai, J.; Chen, X.; Shim, W.Y.; Mirkin, C. A. Nature Nanotechnology 2010, 5, 637-640.
3. Huo, F.; Zheng, Z.; Zheng, G.; Giam, L. R.; Zhang H.; Mirkin, C. A. Science, 2008, 321, 1658-1660.