Journal ArticleDOI
Triblock copolymer syntheses of mesoporous silica with periodic 50 to 300 angstrom pores
Dongyuan Zhao,Jianglin Feng,Qisheng Huo,Nicholas A. Melosh,Glenn H. Fredrickson,Bradley F. Chmelka,Galen D. Stucky +6 more
TLDR
Use of amphiphilic triblock copolymers to direct the organization of polymerizing silica species has resulted in the preparation of well-ordered hexagonal mesoporous silica structures (SBA-15) with uniform pore sizes up to approximately 300 angstroms.Abstract:
Use of amphiphilic triblock copolymers to direct the organization of polymerizing silica species has resulted in the preparation of well-ordered hexagonal mesoporous silica structures (SBA-15) with uniform pore sizes up to approximately 300 angstroms. The SBA-15 materials are synthesized in acidic media to produce highly ordered, two-dimensional hexagonal (space group p6mm) silica-block copolymer mesophases. Calcination at 500°C gives porous structures with unusually large interlattice d spacings of 74.5 to 320 angstroms between the (100) planes, pore sizes from 46 to 300 angstroms, pore volume fractions up to 0.85, and silica wall thicknesses of 31 to 64 angstroms. SBA-15 can be readily prepared over a wide range of uniform pore sizes and pore wall thicknesses at low temperature (35° to 80°C), using a variety of poly(alkylene oxide) triblock copolymers and by the addition of cosolvent organic molecules. The block copolymer species can be recovered for reuse by solvent extraction with ethanol or removed by heating at 140°C for 3 hours, in both cases, yielding a product that is thermally stable in boiling water.read more
Citations
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Nonionic Triblock and Star Diblock Copolymer and Oligomeric Surfactant Syntheses of Highly Ordered, Hydrothermally Stable, Mesoporous Silica Structures
TL;DR: In this paper, a family of highly ordered mesoporous (20−300 A) structures have been synthesized by the use of commercially available nonionic alkyl poly(ethylene oxide) (PEO) oligomeric surfactants and poly(alkylene oxide) block copolymers in acid media.
Journal ArticleDOI
Core/Shell Nanoparticles: Classes, Properties, Synthesis Mechanisms, Characterization, and Applications
Journal ArticleDOI
Ordered mesoporous [alpha]-MoO3 with iso-oriented nanocrystalline walls for thin-film pseudocapacitors
TL;DR: It is shown that the capacitive charge-storage properties of mesoporous films of iso-oriented alpha-MoO(3) are superior to those of either Mesoporous amorphous material or non-porous crystalline MoO( 3).
Journal ArticleDOI
Generalized syntheses of large-pore mesoporous metal oxides with semicrystalline frameworks
TL;DR: In this article, a simple and versatile procedure for the synthesis of thermally stable, ordered, large-pore (up to 140 A) mesoporous metal oxides was described.
Journal ArticleDOI
Synthesis of New, Nanoporous Carbon with Hexagonally Ordered Mesostructure
Shinae Jun,Sang Hoon Joo,Ryong Ryoo,Michal Kruk,Mietek Jaroniec,Zheng Liu,Tetsu Ohsuna,Osamu Terasaki +7 more
TL;DR: O.R.T. and Z.L.K. as discussed by the authors acknowledge donors of the Petroleum Research Fund administered by the American Chemical Society (ACS), and thank CREST, JST for supports.
References
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Journal ArticleDOI
A new family of mesoporous molecular sieves prepared with liquid crystal templates
Jeffrey S. Beck,James C. Vartuli,Wieslaw J. Roth,M. E. Leonowicz,Charles T. Kresge,Kirk D. Schmitt,Cynthia Ting-Wah Chu,David H. Olson,E. W. Sheppard,S. B. McCullen,J. B. Higgins,J.L. Schlenker +11 more
TL;DR: In this paper, the synthesis, characterization, and proposed mechanism of formation of a new family of silicatelaluminosilicate mesoporous molecular sieves designated as M41S is described.
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Generalized synthesis of periodic surfactant/inorganic composite materials
Qisheng Huo,David I. Margolese,Ulrike Ciesla,Pingyun Feng,Thurman E. Gier,Peter Sieger,R. Leon,Pierre Petroff,Ferdi Schüth,Ferdi Schüth,Galen D. Stucky +10 more
TL;DR: In this article, a generalized approach to the synthesis of periodic mesophases of metal oxides and cationic or anionic surfactants under a range of pH conditions is presented.
Journal ArticleDOI
A neutral templating route to mesoporous molecular sieves.
TL;DR: A neutral templating route for preparing mesoporous molecular sieves is demonstrated based on hydrogen-bonding interactions and self-assembly between neutral primary amine micelles (S�) and neutral inorganic precursors (l�).
Journal ArticleDOI
Templating of Mesoporous Molecular Sieves by Nonionic Polyethylene Oxide Surfactants
TL;DR: The results suggest that nonionic templating may provide a general pathway for the preparation of mesoporous oxides.
Journal ArticleDOI
Surfactant Control of Phases in the Synthesis of Mesoporous Silica-Based Materials
TL;DR: In this article, the molecular shapes of covalent organosilanes, quaternary ammonium surfactants, and mixed surfactant in various reaction conditions can be used to synthesize silica-based mesophase configurations.