RefDoc
Haut

Faire une nouvelle recherche
Make a new search
Lancer la recherche


Titre du document / Document title

Surface area and thermal stability effect of the MgO supported catalysts for the synthesis of carbon nanotubes

Auteur(s) / Author(s)

YANG XU (1) ; ZHONGRUI LI (1) ; DERVISHI Enkeleda (1) ; SAINI Viney (1) ; JINGBIAO CUI (2) ; BIRIS Alexandru R. (3) ; LUPU Dan (3) ; BIRIS Alexandru S. (1) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Nanotechnology Center and Applied Science Department, University of Arkansas, Little Rock, AR, 72204, ETATS-UNIS
(2) Physics and Astronomy, University of Arkansas, Little Rock, AR, 72204, ETATS-UNIS
(3) National Institute for Research and Development of Isotopic and Molecular Technologies, Cluj Napoca, RO, 3400, ROUMANIE

Résumé / Abstract

Surface area (SA) of the oxide support was found to play a major role on the morphology, quality of the single wall carbon nanotubes (SWNTs) growth. Fe-Co bimetal was supported onto MgO powders with different surface areas, and used for the SWNTs synthesis from the pyrolysis of CH4 through radio frequency catalytic chemical vapor deposition (RF-CCVD). The high surface area MgO showed specificity towards the growth of SWNTs even at the very high metal loadings of 17.4%. As the MgO surface areas decreased, the agglomeration of the active metal species on the support, nanotubes with wider diameter distributions and more graphitic walls were obtained. This surface area effect suggested that the high surface area networks were responsible for a more effective confinement of the active metal nanoparticles that impeded their migration during the SWNTs thermal growth process. Therefore, by adjusting the surface area or chemical morphology of the catalyst systems, SWNTs with narrower diameter distribution and specific chiralities can be grown.

Revue / Journal Title

Journal of material chemistry    ISSN  0959-9428 

Source / Source

2008, vol. 18, no47, pp. 5738-5745 [8 page(s) (article)] (33 ref.)

Langue / Language

Anglais

Editeur / Publisher

Royal Society of Chemistry, Cambridge, ROYAUME-UNI  (1991) (Revue)

Mots-clés anglais / English Keywords

Chirality

;

Diffusion

;

Nanostructured materials

;

Nanoparticle

;

Confinement

;

Hot filament chemical vapor deposition

;

Iron

;

Singlewalled nanotube

;

Magnesium oxide

;

Methane

;

Pyrolysis

;

Growth mechanism

;

Carbon

;

Microstructure

;

Surface morphology

;

Nanomaterial synthesis

;

Catalyst support

;

Supported catalyst

;

Thermal stability

;

Surface effect

;

Surface area

;

Mots-clés français / French Keywords

8115G

;

8116H

;

MgO

;

Chiralité

;

Diffusion(transport)

;

Nanomatériau

;

Nanoparticule

;

Confinement

;

Dépôt chimique phase vapeur filament chaud

;

Fer

;

Nanotube monofeuillet

;

Oxyde de magnésium

;

Méthane

;

Pyrolyse

;

Mécanisme croissance

;

Carbone

;

Microstructure

;

Morphologie surface

;

Synthèse nanomatériau

;

Support catalyseur

;

Catalyseur sur support

;

Stabilité thermique

;

Effet surface

;

Aire superficielle

;

Mots-clés espagnols / Spanish Keywords

Quiralidad

;

Nanopartícula

;

Confinamiento

;

Depósito químico fase vapor filamento caliente

;

Hierro

;

Nanotubo pared única

;

Magnesio óxido

;

Metano

;

Pirólisis

;

Mecanismo crecimiento

;

Carbono

;

Microestructura

;

Síntesis nanomaterial

;

Soporte catalizador

;

Catalizador sobre soporte

;

Estabilidad térmica

;

Efecto superficie

;

Area superficial

;

Localisation / Location

INIST-CNRS, Cote INIST : 22603, 35400018508060.0040

Nº notice refdoc (ud4) : 20971481



Faire une nouvelle recherche
Make a new search
Lancer la recherche
Bas