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Titolo:
An example of mesostructured zeolitic material: UL-TS-1
Autore:
On, DT; Lutic, D; Kaliaguine, S;
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 Al I Cuza Univ Jassy, Fac Chem, Jassy, Romania Al I Cuza Univ Jassy Jassy Romania Univ Jassy, Fac Chem, Jassy, Romania
Titolo Testata:
MICROPOROUS AND MESOPOROUS MATERIALS
, volume: 44, anno: 2001,
pagine: 435 - 444
SICI:
1387-1811(200106)44:<435:AEOMZM>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
MESOPOROUS MOLECULAR-SIEVES; ADSORPTION; CATALYSTS; NITROGEN; POROSITY;
Keywords:
mesostructured zeolites; UL-zeolites; UL-TS-1; titanium silicalite; oxyfunctionalization;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Kaliaguine, S Univ Laval, Dept Chem Engn, St Foy, PQ G1K 7P4, Canada Univ Laval St Foy PQ Canada G1K 7P4 Foy, PQ G1K 7P4, Canada
Citazione:
D.T. On et al., "An example of mesostructured zeolitic material: UL-TS-1", MICROP M M, 44, 2001, pp. 435-444

Abstract

A new approach for the synthesis of titanium containing mesostructured zeolitic materials, UL-TS-1, that involves the use of surfactant containing amorphous mesoporous titania-silica as precursor phase is reported. UL-TS-1 was synthesized in the solid state by heating TPAOH-impregnated precursor materials at 120 degreesC for several days. Various techniques including XRD,N-2 adsorption, UV-visible, FTIR, TEM and Si-29 MAS NMR were used to monitor the physico-chemical properties of these materials as a function of crystallization time. The XRD diffractograms show broad peaks, which match those of ZSM-5 and grow in intensity as the crystallization time is increased. The increase in the percentage of crystallinity is also correlated with thecorresponding variations in micropore and mesopore volumes, BET and BJH surface areas. The results indicate that the mesopore walls consist of zeolite nanocrystals. Depending on crystallization time, a range of materials from totally amorphous up to 80% crystalline is observed, while some of mesopores are preserved. The FTIR and UV-visible results also show that all titanium ions are essentially incorporated into the UL-TS-1 framework. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 23/09/20 alle ore 00:11:06