A convenient catalytic approach to synthesize straight boron nitride nanotubes using synergic nitrogen source |
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Authors: | Jun Dai Liqiang Xu Zengli Fang Daopeng Sheng Qingfeng Guo Zeyu Ren Kang Wang Yitai Qian |
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Institution: | aKey Laboratory of Colloid and Interface Chemistry, Shandong University, Ministry of Education, Jinan 250100, PR China |
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Abstract: | Straight boron nitride nanotubes (BNNTs) with pure hexagonal phase were conveniently prepared by heating the mixture of Mg(BO2)2 · H2O, NH4Cl, NaN3 and Mg powder in an autoclave at 600 °C for 20–60 h. These BNNTs had diameters mainly ranging 30–300 nm and lengths up to 5 μm, and a majority of them had at least one closed end. Besides the traditional end tips, additional cone-like tips were frequently found to be attached on the BNNTs. The effects of temperature, reactants and the possible mechanism of the catalytic formation of the BNNTs are discussed. |
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