Large-scale synthesis of boron nitride nanotubes with iron-supported catalysts

Ching Yuan Su, Wen Yi Chu, Zhen Yu Juang, Ko Feng Chen, Bing Ming Cheng, Fu Rong Chen, Keh Chyang Leou, Chuen Horng Tsai

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62 Scopus citations

Abstract

Boron nitride nanotubes (BNNTs) were synthesized in a large scale with iron-supported catalysts (Fe/SiO2-Al2O3) at low temperatures (900 °C) in a plasma-assisted chemical vapor deposition system. The structural morphology, chemical composition, and optical and photoluminescence properties of BNNTs were characterized. The obtained BNNTs are crystalline and with tubular structures, and the preferential zigzag arrangement of BNNTs was discovered for the first time for BNNT grown at low temperature (<1000 °C). The O2 additives were found to affect the growth yield significantly and it was attributed to the enhanced dehydrogenation from the catalyst surface and improved balancing of excess H radicals during our synthetic process. In addition, results from elemental-mapping revealed that the boron dissolved in iron tends to precipitate and react with nitrogen to form a BN sheet on the catalyst surface.

Original languageEnglish
Pages (from-to)14732-14738
Number of pages7
JournalJournal of Physical Chemistry C
Volume113
Issue number33
DOIs
StatePublished - 20 Aug 2009

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