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Ç°Ãæ¸÷λ´óÏÀµÄÖ÷ÒªÊÓÏß¶¼¼¯ÖÐÔÚ½é¿×¹è£¨Mesoporous Silica£©£¬ÄÇôÎÒ¾ÍÀ´ÆªNatureÉϵĹØÓÚmesoporous metal oxides µÄÎÄÕ¡£^_^ Title£ºGeneralized syntheses of large-pore mesoporous metal oxides with semicrystalline frameworks Authors£ºPeidong Yang, Dongyuan Zhao, David I. Margolese,Bradley F. Chmelka& Galen D. Stucky VOL 396£¬Page152 Abstract: Surfactants have been shown to organize silica into a variety of mesoporous forms, through the mediation of electrostatic, hydrogen-bonding, covalent and van der Waals interactions(1-8). This approach to mesostructured materials has been extended, with sporadic success, to non-silica oxides(5-17), which might promise applications involving electron transfer or magnetic interactions. Here we report a simple and versatile procedure for the synthesis of thermally stable, ordered, large-pore (up to 140 Angstrom) mesoporous metal oxides, including TiO2, ZrO2, Al2O3, Nb2O5, Ta2O5, WO3, HfO2, SnO2, and mixed oxides SiAlO3.5, SiTiO4, ZrTiO4, Al2TiO5 and ZrW2O8. We used amphiphilic poly(alkylene oxide) block copolymers as structure-directing agents in non-aqueous solutions for organizing the network-forming metal-oxide species, for which inorganic salts serve as precursors. Whereas the pore walls of surfactant-templated mesoporous silica(1) are amorphous, our mesoporous oxides contain nanocrystalline domains within relatively thick amorphous walls. We believe that these materials are formed through a mechanism that combines block copolymer self-assembly with complexation of the inorganic species. |
33Â¥2007-04-30 23:31:03
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3Â¥2007-04-26 17:30:55
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ÍÆ¼ö¼¸Æª½é¿×²ÄÁÏÖØÒªµÄ×ÛÊö£º Chem. Mater. 1996, 8, 1147-1160 Surfactant Control of Phases in the Synthesis of Mesoporous Silica-Based Materials(StuckyºÍ»ôÆôÉý ±íÃæ»îÐÔ¼ÁµÄ¶Ñ»ý²ÎÊýºÍ½á¹¹µÄ¹ØÏµ£© Chem. Rev. 1997, 97, 2373-2419 From Microporous to Mesoporous Molecular Sieve Materials and Their Use in Catalysis£¨Ö÷Òª½éÉܽé¿××÷´ß»¯ÔØÌåµÄÓ¦Óã© Chem. Rev. 2006, 106, 3790-3812 Advances in the Synthesis and Catalytic Applications of Organosulfonic-Functionalized Mesostructured Materials£¨Óлú¹ÙÄÜ»¯½é¿×µÄºÏ³É¼°ÔÚ´ß»¯ÖеÄÓ¦Óã© Acc. Chem. Res. 2002, 35, 927-935¡¡Structural and Morphological¡¡Control of Cationic¡¡Surfactant-Templated¡¡Mesoporous Silica£¨Ä²ÖÐÔ ¾ßÌå̸ÂÛ½é¿×ÐÎòµÄÐγɣ©¡¡ Angew. Chem. Int. Ed. 2006, 45, 3216¨C3251 Silica-Based Mesoporous Organic-Inorganic Hybrid Materials£¨Frank Hoffmann ËùÖø£¬·Ç³£ºÃ£© Acc.Chem.Res.2005, 38,305-312 Past, Present, and Future of Periodic Mesoporous Organosilicas-The PMOs£¨O'zin ÖØµã½éÉÜÖÜÆÚÐÔ½é¿×£© NATURE 2002 417 813 Ordered porous materials for emergeing application £¨´óÅ£DavisËùÖø£© Chem. Mater. 1999, 11, 2633-2656 Tailored Porous Materials(Thomas J.) |
5Â¥2007-04-26 20:50:31
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½é¿×·Ö×ÓɸµÄÓ¦Ó㺠½é¿×·Ö×ÓɸÎü¸½°±»ùË᣺ Carbon 44 (2006) 530¨C536 Adsorption of L-histidine over mesoporous carbon molecular sieves(Ó¡¶ÈÈË A. Vinu£© Separation and Purification Technology 48 (2006) 197¨C201 Amino acid adsorption onto mesoporous silica molecular sieves £¨Êׯª£© ½é¿×·Ö×ÓɸÎü¸½µ°°×ÖÊ£¨Ã¸£© Journal of Molecular Catalysis B£ Enzymatic 2£¨1996£© 115£ 126 Enzyme immobilization in MCM-4 1 molecular sieve£¨Êׯª£© J. Am. Chem. Soc. 1999, 121, 9897-9898 Mesoporous Silicate Sequestration and Release of Proteins£¨stucky) J. AM. CHEM. SOC. 2004, 126, 12224-12225 Protein Encapsulation in Mesoporous Silicate-The Effects of Confinement on Protein Stability, Hydration, and Volumetric Properties J. Phys. Chem. B 2003, 107, 8297-8299 Adsorption of Cytochrome C on New Mesoporous Carbon Molecular Sieves(Vinu, A) ½é¿×·Ö×Óɸ¸ºÔØ´ß»¯¼Á J. Phys. Chem. B 2006, 110, 15212-15217 Fabrication and characterization of mesoporous Co3O4 core-mesoporous silica shell nanocomposites£¨µäÐ͵Äcore£shell½á¹¹£© CHEM. COMMUN., 2003, 1522¨C1523 Ultra-thin porous silica coated silver¨Cplatinum alloy nano-particle as a new catalyst precursor Applied Catalysis A General 308 (2006) 19¨C30 Carbon oxide hydrogenation over silica-supported iron-based catalysts Influence of the preparation route Chem. Commun., 2005, 348¨C350 Metallic Ni nanoparticles confined in hexagonally ordered mesoporous silica material ½é¿×·Ö×ÓɸÔÚÒ©Îï¿É¿ØÊÍ·Å·½ÃæµÄÓ¦Óà Chem. Mater. 2001, 13, 308-311 A New Property of MCM-41, Drug Delivery System£¨Vallet-Regi Êׯª£© Nature 2003, 421, 350 ¨C 353¡¡Photocontrolled reversible release¡¡of guest molecules from coumarinmodified¡¡modified¡¡mesoporous silica£¨µÚÒ»´ÎÖ»ÄÜ»¯£© J. AM. CHEM. SOC. 2005, 127, 8916-8917 Fabrication of Uniform Magnetic Nanocomposite Spheres with a Magnetic Core-Mesoporous Silica Shell Structure-support£¨Ê©½£ÁÖ ËùνµÄ¡°Ò©Îï·Ö×ÓÔËÊä³µ¡±£© Angew. Chem. Int. Ed. 2005, 44, 5038 ¨C5044 Stimuli-Responsive Controlled-Release Delivery System Based on Mesoporous Silica Nanorods Capped with Magnetic Nanoparticles£¨Victor S.-Y. Lin* ÔÚÖÇÄܽé¿×Ò©ÎïÊÍ·Å·½ÃæÊǹ±Ï×¾Þ´ó£© ½é¿×·Ö×ÓɸÎü¸½·ÏË®ÑôÀë×Ó Chemosphere 59 (2005) 779¨C786 Heavy metals removal from electroplating wastewater by aminopropyl-Si MCM-41 Environ. Sci. Technol.2000, 34,4822-4827 Surfactant-Templated Mesoporous Silicate Materials as Sorbents for Organic Pollutants in Water Ind. Eng. Chem. Res. 2004, 43, 1478-1484 Highly Selective Adsorption of Pt2+ and Pd2+ Using Thiol-Functionalized Mesoporous Silica ½é¿×·Ö×ÓɸÔÚÉ«Æ×ÖеÄÓ¦Óà Chem. Commun., 2002, 752 - 753¡¡Biomolecule separation using large pore mesoporous SBA-15 as a substrate in high performance liquid chromatography Electrophoresis 2006,27,742¨C748 Large-pore¡¡mesoporous SBA-15¡¡silica¡¡particles with submicrometer¡¡size as¡¡stationary phases for¡¡high-speed CEC¡¡seperation ½é¿×·Ö×Óɸ×÷ΪӲģ°å Adv. Mater. 2001, 13,¡¡677-681¡¡Ordered Mesoporous Carbons£¨Ryong Ryoo£© Microporous and Mesoporous Materials 63 (2003) 1¨C9 Synthesis and characterization of spherical carbon and polymer capsules with hollow macroporous core and mesoporous shell structures ½é¿×·Ö×Óɸ¸´ºÏ²ÄÁÏ£¨ÊµÏÖ¹âѧÐÔÄÜ£¬±ÈÈç²ôÈë¶þÑõ»¯îÑ£¬Á¿×ӵ㣩 J. Phys. Chem. B 2005, 109, 12309-12315 Synthesis and Characterization of Nano titania Particles Embedded in Mesoporous Silica with Both High Photocatalytic Activity and Adsorption Capability Chem. Mater. 2005, 17, 1269-1271 Preparation of Mesoporous Titania Thin Films with Remarkably High Thermal Stability J. AM. CHEM. SOC. 2006, 128, 688-689¡¡Magnetic Fluorescent Delivery Vehicle Using Uniform Mesoporous Silica¡¡Spheres Embedded with Monodisperse Magnetic and Semiconductor¡¡Nanocrystals¡¡¡¡ ½é¿×·Ö×Óɸ±¡Ä¤ [ Last edited by 604gq on 2007-4-27 at 20:36 ] |
6Â¥2007-04-26 21:37:16













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