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通过热等离子法从氨酸中合成双层化纳米管

Dongsu Bae¹, Unseok Jung², Hunsu Lee²

¹Department of Chemical Engineering, Pohang University of Science and Technology, 77 Cheongam-ro, Nam-Gu, Pohang, Gyeongbuk 37673, Republic of Korea.

|June 26, 2023

概括

氨酸前体使得双壁化纳米管 (DWBNNTs) 的新型高产合成成为可能. 这种方法显著提高了生产率和纯度,为商业化铺平了道路.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
化学工程是化学工程的重要组成部分.

背景情况:

化纳米管 (BNNTs) 具有用于先进应用的独特特性.
对于BNNTs的传统合成方法在产量和纯度方面面临挑战.
开发高效的合成路径对于BNNT的商业化至关重要.

研究的目的:

通过使用氨酸 (AB) 前体,研究高度结晶的双壁化纳米管 (DWBNNTs) 的合成.
为了比较从AB前体合成的BNNTs与六角化 (h-BN) 前体合成的BNNTs.
阐明增长机制并评估商业化潜力.

主要方法:

使用氨 (AB) 前体的高温热等离子体合成.
使用热重力测量分析,X射线衍射,FTIR,拉曼光谱,SEM,TEM和现场OES进行比较分析.
合成的DWBNNTs的结晶性,形态和纯度的表征.

主要成果:

从AB前体中成功合成了高晶度的DWBNNTs (∼60%).
与h-BN前体方法相比,AB前体方法产生了较长的BNNT,墙壁较少.
生产速度从≤20g/h (h-BN) 增加到≤50g/h (AB),无形杂质显著减少.
证据表明BN基的自我组装机制,导致增强的生长特征.

结论:

氨基是高产量,高纯度DWBNNT合成的可行前体.
这种新的合成方法在生产速度和BNNT质量方面提供了显著的改进.
这种方法对BNNTs的创新贡献和商业化充满希望.

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