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Effect of reaction temperature and catalyst type on the formation of boron nitride nanotubes by chemical vapor deposition and measurement of their hydrogen storage capacity / Burcu Saner Okan in Industrial & engineering chemistry research, Vol. 51 N° 35 (Septembre 2012) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11341–11347 Titre : Effect of reaction temperature and catalyst type on the formation of boron nitride nanotubes by chemical vapor deposition and measurement of their hydrogen storage capacity Type de document : texte imprimé Auteurs : Burcu Saner Okan, Auteur ; Zuleyha Ozlem Kocabas, Auteur ; Asli Nalbant Ergun, Auteur Année de publication : 2012 Article en page(s) : pp. 11341–11347 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Catalyst  Nanotubes Résumé : Boron nitride nanotubes (BNNT) were synthesized over both Fe3+ impregnated MCM-41 (mobil composition of matter no. 41) and Fe2O3/MCM-41 complex catalyst systems at relatively low temperatures for 1 h by the chemical vapor deposition technique in large quantities. The formation of BNNT was tailored at different reaction temperatures by changing catalyst type. The use of Fe3+-MCM-41 and Fe2O3 as a complex catalyst system led to thin and thick tube formations. The diameters of BNNTs were in the range of 2.5–4.0 nm for thin tubes and 20–60 nm for thick tubes. The thin tube formation originated from the growth of BNNT over Fe3+-MCM-41 due to its average pore size of 4 nm. Higher reaction temperatures caused both BNNT and iron-based side product formations. The hydrogen uptake capacity measurements by the Intelligent Gravimetric Analyzer at room temperature showed that BNNTs could adsorb 0.85 wt % hydrogen which was two times larger than that for commercial carbon nanotubes. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301605z [article] Effect of reaction temperature and catalyst type on the formation of boron nitride nanotubes by chemical vapor deposition and measurement of their hydrogen storage capacity [texte imprimé] / Burcu Saner Okan, Auteur ; Zuleyha Ozlem Kocabas, Auteur ; Asli Nalbant Ergun, Auteur . - 2012 . - pp. 11341–11347. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 51 N° 35 (Septembre 2012) . - pp. 11341–11347 Mots-clés : Catalyst  Nanotubes Résumé : Boron nitride nanotubes (BNNT) were synthesized over both Fe3+ impregnated MCM-41 (mobil composition of matter no. 41) and Fe2O3/MCM-41 complex catalyst systems at relatively low temperatures for 1 h by the chemical vapor deposition technique in large quantities. The formation of BNNT was tailored at different reaction temperatures by changing catalyst type. The use of Fe3+-MCM-41 and Fe2O3 as a complex catalyst system led to thin and thick tube formations. The diameters of BNNTs were in the range of 2.5–4.0 nm for thin tubes and 20–60 nm for thick tubes. The thin tube formation originated from the growth of BNNT over Fe3+-MCM-41 due to its average pore size of 4 nm. Higher reaction temperatures caused both BNNT and iron-based side product formations. The hydrogen uptake capacity measurements by the Intelligent Gravimetric Analyzer at room temperature showed that BNNTs could adsorb 0.85 wt % hydrogen which was two times larger than that for commercial carbon nanotubes. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie301605z