Magnesium Ferrite Promoting the Purity of Grown Boron Nitride Nanotubes

IF 3.3 3区 化学 Q2 CHEMISTRY, PHYSICAL
Xin Chen, Liyun Wu, Kai Zhang, Qian He, Ying Wang, Haoting Niu, WenTao Zheng, Yagang Yao
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引用次数: 0

Abstract

The synthesis of boron nitride nanotubes via the boron oxide chemical vapor deposition process, especially when boron, magnesium oxide, and iron oxide are used as precursors for the synthesis, often encounters the problem of nanotubes doped with impurities, such as nanosheets and fibers. For this reason, this study adopts a novel active component of magnesium ferrite with a defined decomposition temperature and successfully synthesizes high-purity nanotubes. Growth experiments combined with computational fluid dynamics (CFD) simulations were performed to investigate the effects of active component ratio, growth temperature, ammonia flow rate, and boron source velocity on nanotube growth and the differences with that of magnesium oxide-iron oxide. Morphological analysis showed that the nanotubes grown from magnesium ferrite have better purity, effectively preventing the mixing of impurities in nanosheets and nanofibers. Furthermore, it was found that these nanotubes float at a more controlled height in a wider ammonia flow rate and temperature range. These allow for a more efficient collection of purer nanotube products for magnesium ferrite.

Abstract Image

铁酸镁提高氮化硼纳米管的纯度
通过氧化硼化学气相沉积工艺合成氮化硼纳米管,特别是使用硼、氧化镁和氧化铁作为合成前驱体时,经常会遇到纳米管掺杂杂质的问题,如纳米片和纤维。因此,本研究采用了一种新型活性成分镁铁氧体,并规定了分解温度,成功合成了高纯度纳米管。生长实验结合计算流体动力学(CFD)模拟,研究了活性组分比例、生长温度、氨流速和硼源速度对纳米管生长的影响,以及与氧化镁-氧化铁纳米管生长的差异。形态分析表明,由镁铁氧体生长的纳米管具有更好的纯度,能有效防止杂质混入纳米片和纳米纤维中。此外,研究还发现,在更宽的氨流速和温度范围内,这些纳米管的漂浮高度更可控。这样就能更有效地收集到更纯净的镁铁氧体纳米管产品。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
The Journal of Physical Chemistry C
The Journal of Physical Chemistry C 化学-材料科学:综合
CiteScore
6.50
自引率
8.10%
发文量
2047
审稿时长
1.8 months
期刊介绍: The Journal of Physical Chemistry A/B/C is devoted to reporting new and original experimental and theoretical basic research of interest to physical chemists, biophysical chemists, and chemical physicists.
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