Journal ArticleDOI
Direct syntheses of ordered SBA-15 mesoporous materials containing arenesulfonic acid groups
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TLDR
SBA-15 mesoporous silica has been functionalized with arenesulfonic acid groups by means of a one-step simple synthesis approach involving co-condensation of tetraethoxysilane (TEOS) and 2-(4-chlorosulfonylphenyl)ethyltrimethoxylynylane (CSPTMS) under acid silica-based catalysis.Abstract:
SBA-15 mesoporous silica has been functionalized with arenesulfonic acid groups by means of a one-step simple synthesis approach involving co-condensation of tetraethoxysilane (TEOS) and 2-(4-chlorosulfonylphenyl)ethyltrimethoxysilane (CSPTMS) in the presence of a poly(alkylene oxide) block copolymer (Pluronic 123) under acid silica-based catalysis. The resultant materials show hexagonal mesoscopic order and pores sizes up to 60 A, with acid exchange capacities of ca. 1.3 mequiv. H+ per g SiO2 and surface areas up to 600 m2 g−1. The sulfonic groups anchored to the silica surface of the pore walls are thermally stable to temperatures up to 380 °C and resistant to leaching in organic and aqueous solutions under mild conditions. 31P MAS NMR measurements of chemically adsorbed triethylphosphine oxide and the catalytic properties confirm the presence
of Bronsted acid centers in these mesoporous materials containing arenesulfonic acid groups that are stronger than those found in propanesulfonic-modified SBA-15 and Al-MCM-41.read more
Citations
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Lewis Acids: From Conventional Homogeneous to Green Homogeneous and Heterogeneous Catalysis
Journal ArticleDOI
Mercaptopropyl-Modified Mesoporous Silica: A Remarkable Support for the Preparation of a Reusable, Heterogeneous Palladium Catalyst for Coupling Reactions
TL;DR: The functionalization of SBA-15 with mercaptopropyl trimethoxysilane leads to a material capable of absorbing Pd from organic and aqueous solutions, illustrating the importance of the thiol ligand to retain Pd on the surface.
Journal ArticleDOI
Advances in the Synthesis and Catalytic Applications of Organosulfonic-Functionalized Mesostructured Materials
Journal ArticleDOI
Organosulfonic acid-functionalized mesoporous silicas for the esterification of fatty acid
TL;DR: In this article, organosulfonic acid-functionalized mesoporous materials were synthesized in a one-step approach of co-condensing inorganic-organic reagents in the presence of different surfactant templates with in situ oxidation of the thiol groups to the sulfonic acid groups.
Journal ArticleDOI
Fast and selective sugar conversion to alkyl lactate and lactic acid with bifunctional carbon-silica catalysts.
Filip de Clippel,Michiel Dusselier,Ruben Van Rompaey,Pieter Vanelderen,Jan Dijkmans,E. V. Makshina,Lars Giebeler,Steffen Oswald,Gino V. Baron,Joeri Denayer,Paolo P. Pescarmona,Pierre Jacobs,Bert F. Sels +12 more
TL;DR: It was demonstrated for the first time that the presence of weak Brønsted acid sites is crucial in accelerating the rate-determining (dehydration) reaction, that is, the first step in the reaction network from triose to lactate.
References
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TL;DR: Mise au point comportant des definitions generales et la terminologie, la methodologie utilisee, les procedes experimentaux, les interpretations des donnees d'adsorption, les determinations de l'aire superficielle, and les donnes sur la mesoporosite et la microporosite.
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
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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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.
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From Microporous to Mesoporous Molecular-Sieve Materials and Their Use in Catalysis
TL;DR: Corma et al. as mentioned in this paper used the Dupont Award on new materials (1995), and the Spanish National Award “Leonardo Torres Quevedo” on Technology Research (1996) on technology research (1996), to recognize the performance of zeolites as catalysts for oil refining and petrochemistry.
Journal ArticleDOI
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.