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Titolo:
Synthesis of porous organosilicates in the presence of alkytrimethylammonium chlorides: Effect of the alkyl chain length
Autore:
Hamoudi, S; Yang, Y; Moudrakovski, IL; Lang, S; Sayari, A;
Indirizzi:
Univ Laval, Dept Chem Engn, St Foy, PQ G1K 7P4, Canada Univ Laval St Foy PQ Canada G1K 7P4 Chem Engn, St Foy, PQ G1K 7P4, Canada Univ Laval, CERPIC, St Foy, PQ G1K 7P4, Canada Univ Laval St Foy PQ Canada G1K 7P4 l, CERPIC, St Foy, PQ G1K 7P4, Canada CNR, Steacie Inst Mol Sci, Ottawa, ON K1A 0R6, Canada CNR Ottawa ON Canada K1A 0R6 cie Inst Mol Sci, Ottawa, ON K1A 0R6, Canada
Titolo Testata:
JOURNAL OF PHYSICAL CHEMISTRY B
fascicolo: 38, volume: 105, anno: 2001,
pagine: 9118 - 9123
SICI:
1520-6106(20010927)105:38<9118:SOPOIT>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
MESOPOROUS MOLECULAR-SIEVES; ORGANIC GROUPS; CHANNEL WALLS; NANOSTRUCTURES; FRAMEWORKS; ADSORPTION; SILICA;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
24
Recensione:
Indirizzi per estratti:
Indirizzo: Sayari, A Univ Ottawa, Dept Chem, Ctr Catalysis Res & Innovat, Ottawa, ON K1N 6N5, Canada Univ Ottawa Ottawa ON Canada K1N 6N5 Ottawa, ON K1N 6N5, Canada
Citazione:
S. Hamoudi et al., "Synthesis of porous organosilicates in the presence of alkytrimethylammonium chlorides: Effect of the alkyl chain length", J PHYS CH B, 105(38), 2001, pp. 9118-9123

Abstract

A series of organosilicates were prepared using 1,2-bis(trimethoxysilyl)ethane (BTME) as silica precursor and alkyltrimethylammonium chloride (C(n)TMACl) surfactants with different chain lengths (n = 8, 10, 12, 14, 16, 18) as supramolecular templating materials. C-13 and Si-29 NMR data showed that after surfactant extraction, all samples consisted of pure organosilicate. Additional characterization techniques, that is, XRD, N-2 adsorption, and SEM, were also used to gain insights into the structure, porosity, and morphology of the materials. These properties were found to be strongly dependent on the surfactant chain length and the preparation conditions. Materials prepared in the presence of surfactants with the shortest carbon chains were microporous akin to amorphous organosilicate xerogels. However, in the presence of long chain surfactants, periodic mesoporous organosilicates with narrow pore size distributions occurred. The pore sizes of such materials were found to increase with the surfactant carbon chain length. With only one exception, these materials exhibited two-dimensional hexagonal symmetry.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 22/09/20 alle ore 20:49:41