Article (Scientific journals)
An Eco-friendly Soft Template Synthesis of Mesostructured Silica-Carbon Nanocomposites for Acid Catalysis
Zhong, Ruyi; Peng, Li; de Clippel, P et al.
2015In ChemCatChem, 7, p. 3047-3048
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Keywords :
Catalysis; Porous Materials; Small-angle c-ray scattering
Abstract :
[en] The synthesis of ordered mesoporous silica-carbon composites was explored by employing TEOS and sucrose as the silica and carbon precursor respectively, and the triblock copolymer F127 as a structure-directing agent via an evaporation-induced self assembly (EISA) process. It is demonstrated that the synthesis procedures allow for control of the textural properties and final composition of these silica-carbon nano composites via adjustment of the effective SiO2/C weight ratio. Characterization by SAXS, N2 physisorption, HRTEM, TGA, and 13C and 29Si solid-state MAS NMR show a 2D hexagonal mesostructure with uniform large pore size ranging from 5.2 to 7.6 nm, comprising of separate carbon phases in a continuous silica phase. Ordered mesoporous silica and non-ordered porous carbon can be obtained by combustion of the pyrolyzed nano composites in air or etching with HF solution, respectively. Sulfonic acid groups can be readily introduced to such kind of silica-carbon nanocomposites by a standard sulfonation procedure with concentrated sulfuric acid. Excellent acid-catalytic activities and selectivities for the dimerization of styrene to produce 1,3-diphenyl-1-butene and dimerization of a-methylstyrene to unsaturated dimers were demonstrated with the sulfonated materials.
Disciplines :
Chemistry
Author, co-author :
Zhong, Ruyi;  Katholieke Universiteit Leuven - KUL
Peng, Li
de Clippel, P
Gommes, Cédric  ;  Université de Liège > Department of Chemical Engineering > Department of Chemical Engineering
Goderis, Bart;  Katholieke Universiteit Leuven - KUL
Xiaoxing
van Tendeloo
Jacobs, Pierre
Sels, Bert;  Katholieke Universiteit Leuven - KUL
Language :
English
Title :
An Eco-friendly Soft Template Synthesis of Mesostructured Silica-Carbon Nanocomposites for Acid Catalysis
Publication date :
2015
Journal title :
ChemCatChem
ISSN :
1867-3880
eISSN :
1867-3899
Publisher :
Wiley - VCH Verlag GmbH & Co. KGaA, Germany
Volume :
7
Pages :
3047-3048
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 05 October 2015

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