Journal Article10.1021/JA974025I
Nonionic Triblock and Star Diblock Copolymer and Oligomeric Surfactant Syntheses of Highly Ordered, Hydrothermally Stable, Mesoporous Silica Structures
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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.
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Abstract: A family of highly ordered mesoporous (20−300 A) silica 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. Periodic arrangements of mescoscopically ordered pores with cubic Im3m, cubic Pm3m (or others), 3-d hexagonal (P63/mmc), 2-d hexagonal (p6mm), and lamellar (Lα) symmetries have been prepared. Under acidic conditions at room temperature, the nonionic oligomeric surfactants frequently form cubic or 3-d hexagonal mesoporous silica structures, while the nonionic triblock copolymers tend to form hexagonal (p6mm) mesoporous silica structures. A cubic mesoporous silica structure (SBA-11) with Pm3m diffraction symmetry has been synthesized in the presence of C16H33(OCH2CH2)10OH (C16EO10) surfactant species, while a 3-d hexagonal (P63/mmc) mesoporous silica structure (SBA-12) results when C18EO10 is used. Surfactants with short EO segments tend to form lamellar mesost...
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Citations
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TL;DR: In this paper, the recent development in the field of synthesis, characterization and particularly catalytic investigation of zeolite-based materials combining micro and mesoporous features is discussed, and the relevance of individual experimental techniques for analysis of the composites, i.e., their structure, porosity, chemical composition, morphological features, and so on, are described.
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Ordered Mesoporous Bioactive Glasses for Bone Tissue Regeneration
Adolfo López-Noriega,Daniel Arcos,Isabel Izquierdo-Barba,Y. Sakamoto,Osamu Terasaki,María Vallet-Regí +5 more
TL;DR: In this article, a series of ordered mesoporous SiO2−CaO−P2O5 sol−gel glasses which are highly bioactive has been synthesized through evaporation-induced self-assembly in the presence of a nonionic triblock copolymer, EO20PO70EO20 (P123), template.
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Organic-Inorganic Hybrid Polymers as Adsorbents for Removal of Heavy Metal Ions from Solutions: A Review.
TL;DR: The adsorption characteristics of heavy metals of organic-inorganic hybrid polymers, including different kinds of functional groups, selectivity of them for heavy metals, effect of pH and synthesis conditions on Adsorption capacity, are studied.
Tailoring the Pore Structure of SBA-16 Silica Molecular Sieve through the Use of Copolymer Blends and Control of Synthesis Temperature and Time
Tae-Wan Kim,Ryong Ryoo,Michal Kruk,Kamil P. Gierszal,Mietek Jaroniec,and Satoshi Kamiya,Osamu Terasaki +6 more
TL;DR: SBA-16 mesoporous silicas with cubic Im3m structure were synthesized using Pluronic F127 poly(ethylene oxide)−poly(propylene oxide) −poly(ethylenes oxide) triblock copolymer (EO106PO70EO106) and its blends with Pluronics P123 triblock Copolymer(EO20 PO70EO20) as supramolecular templates as discussed by the authors.
351
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TL;DR: 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.
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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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