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

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• 作者：Burcu Saner Okan ; Z眉leyha 脰zlem Kocaba艧 ; Asli Nalbant Erg眉n ; Mustafa Baysal ; Ilse Letofsky-Papst ; Yuda Y眉r眉m
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2012
• 出版时间：September 5, 2012
• 年：2012
• 卷：51
• 期：35
• 页码：11341-11347
• 全文大小：553K
• 年卷期：v.51,no.35(September 5, 2012)
• ISSN：1520-5045

文摘

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鈥?.0 nm for thin tubes and 20鈥?0 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.