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Titolo:
Preparation and characterization of SiC microtubes
Autore:
Keller, N; Pham-Huu, C; Ledoux, MJ; Estournes, C; Ehret, G;
Indirizzi:
Univ Strasbourg 1, Lab Chim Mat Catalyt, ECPM, F-67087 Strasbourg 2, France Univ Strasbourg 1 Strasbourg France 2 ECPM, F-67087 Strasbourg 2, France CNRS, Grp Mat Inorgan, IPCMS, UMR 7504, F-67037 Strasbourg, France CNRS Strasbourg France F-67037 CMS, UMR 7504, F-67037 Strasbourg, France CNRS, Grp Surface & Interface, IPCMS, UMR 7504, F-67037 Strasbourg, FranceCNRS Strasbourg France F-67037 CMS, UMR 7504, F-67037 Strasbourg, France
Titolo Testata:
APPLIED CATALYSIS A-GENERAL
fascicolo: 2, volume: 187, anno: 1999,
pagine: 255 - 268
SICI:
0926-860X(19991025)187:2<255:PACOSM>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
CHEMICAL-VAPOR-DEPOSITION; SILICON-CARBIDE; SURFACE-AREA; ACTIVATED CARBON; POLYCARBOSILANE PRECURSOR; ELECTRON-MICROSCOPY; SUPPORTED CATALYSTS; MICROSTRUCTURE; CONVERSION; POWDERS;
Keywords:
silicon carbide; microtubes; high surface area; catalyst support;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
40
Recensione:
Indirizzi per estratti:
Indirizzo: Ledoux, MJ Univ Strasbourg 1, Lab Chim Mat Catalyt, ECPM, 25 Rue Becquerel, F-67087 Strasbourg 2, France Univ Strasbourg 1 25 Rue Becquerel Strasbourg France 2 France
Citazione:
N. Keller et al., "Preparation and characterization of SiC microtubes", APP CATAL A, 187(2), 1999, pp. 255-268

Abstract

Silicon carbide microtubes with medium surface area, 30-70 m(2) g(-1), were successfully prepared by shape memory synthesis involving the reaction between SiO vapors and low surface area, 1-2 m(2) g(-1), carbon microfibers. The gross morphology of the carbon microfibers was conserved during the carburization process. After calcination at 600 degrees C in order to eliminate the unreacted carbon, hollow SiC microtubes were obtained. The pore size distribution of the material was centered around 10 nm, allowing a high accessibility of potential reactants to an active phase during catalytic reactions. The surface was covered by an amorphous layer 3 nm thick, XPS measurements revealed that this amorphous phase was composed of a mixture of SiO2 and SiOxCy. Soda treatment at 80 degrees C allowed complete removal of thissurface phase without any change in the material morphology. A similar result was also obtained after treatment with an aqua regia medium. (C) 1999 Elsevier Science B.V. All rights reserved.

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Documento generato il 27/11/20 alle ore 07:12:37