polymer compositenanoporous materials

Prepapration, Applications and Structural Determination of Nano-porous Materials Contents Definition of “Nanoporous materials” History Structures and Characterization Chemical Bonds & Self-assembly Preparation of Nanoporous materials Applications Nanostructured Materials •Nanostructures represent the transition from atom to solid. •It is essential to obtain particles or pores with uniform diameters and shapes and, for the purpose of particular applications, to arrange and embed them in a superstructure. •Size quantization effects, high number of surface atoms, and special surface states. •Special optical, electronic, magnetic, and chemical properties •Good applications in the areas of signal transmission, data and energy storage, catalysis, as well as biology. 定 定 義 義 Definition Definition 什麼是奈米孔洞材料 What are Nano-porous materials 奈米孔洞材料 Nanoporous materials IUPAC（International Union of Pure and Applied Chemistry）將多孔性材料按孔洞直徑大小分類 成三類: w 微孔洞（microporous，d＜2 nm） w 介孔洞（mesoporous，2 nm＜d＜50 nm ） w 大孔洞（macroporous，d＞50 nm） Photonic crystals Angew. Chem. Int. Ed. Vol. 41, pp. 688-714 (2002) 奈米孔洞材料 Nano-porous materials Zeolites (沸石) & Molecular Sieves (分子篩) w Zeolites w - crystalline aluminosilicate with open structures w Molecular Sieves w -materials which can separate gases based on molecular size 沸石骨架結構的形成 Construction of Zeolites Building unit 沸石骨架中的矽原子被異原子取代 Isomorphous substitution of Si in zeolite framework [...]... in refining and petrochemicals worldwide ⇒ Many synthetic zeolites are prepared 結 構 Structure 奈米孔洞材料的結構與鑑定 Structures and Structural characterization of Nano-porous materials 奈米孔洞材料鑑定技術 Techniques for characterization of nano-porous materials w Crystalline structure - Single crystal & Powder X-ray diffraction (XRD) - Electron crystallography w Oxidation state & Coordination - X-ray absorption spectra...不同孔洞結構的 沸石 Zeolites of various pore structures 發 展 史 Historical development of Nano-porous Materials 奈米孔洞材料的演進 Historical development • Natural zeolites discovery of “stilbite” by Swedish mineralogist A.F Cronsted in 1756 - since 1950s, >1000 zeolite minerals in >40 countries - • “Zeolite” means... Properties of Hexagonal MCM-41 Benzene Sorption Isotherm Pore-Size Distribution TEM de Broglie relation λ = h / mv Electron diffraction crystallography 29Si MAS NMR 奈米孔洞材料的製備 Preparation of Nano-porous materials 化學鍵 & 自組作用 Chemical bonds & Self-assembly Periodic Table A Summary of Trends Pauling’s Electronegativities w w w χA = χB non-polar covalent bond χA - χB < 1.8 polar covalent bond χA - χB > 2 . Determination of Nano-porous Materials Contents Definition of “Nanoporous materials History Structures and Characterization Chemical Bonds & Self-assembly Preparation of Nanoporous materials Applications Nanostructured. as well as biology. 定 定 義 義 Definition Definition 什麼是奈米孔洞材料 What are Nano-porous materials 奈米孔洞材料 Nanoporous materials IUPAC（International Union of Pure and Applied Chemistry）將多孔性材料按孔洞直徑大小分類 成三類: w. (2002) 奈米孔洞材料 Nano-porous materials Zeolites (沸石) & Molecular Sieves (分子篩) w Zeolites w - crystalline aluminosilicate with open structures w Molecular Sieves w -materials which can separate