Synthesis of vertically aligned boron nitride nanotubes with a template of single-walled carbon nanotubes
Synthesis of vertically aligned boron nitride nanotubes with a template of single-walled carbon nanotubes
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DOI：
10.1557/s43578-022-00759-z
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发表时间：
2022-10
影响因子：
2.7
通讯作者：
Ming Liu;Shuhui Wang;Yongjia Zheng;M. Takeuchi;Taiki Inoue;R. Xiang;S. Maruyama
中科院分区：
文献类型：
--
作者：
Ming Liu;Shuhui Wang;Yongjia Zheng;M. Takeuchi;Taiki Inoue;R. Xiang;S. Maruyama
氮化硼纳米管由于其优异的性能如高导热性和优异的化学稳定性而被认为在各种应用中具有巨大的潜力。在这里，我们提出了一种模板辅助的方法合成垂直取向的氮化硼纳米管（VA-BNNT）从垂直取向的单壁碳纳米管（VA-SWCNT）。该方法涉及首先将氮化硼层化学气相沉积涂覆到VA-SWCNT上，随后通过在纯氧中氧化去除VA-SWCNT。所得到的VA-SWCNTs被BNNT和VA-BNNT阵列覆盖，保持了高度有序的垂直排列结构。用BNNT包覆VA-SWCNTs提高了其热稳定性。用扫描电镜和透射电镜对产物的结构和结晶状态进行了表征。采用紫外-可见-近红外吸收光谱和拉曼光谱对样品的化学组成进行了研究。氮化硼涂层从VA-SWCNT阵列的顶部开始到VA-SWCNT上，这通过NanoSIMS表征证实。图形摘要
Boron nitride nanotubes have been proposed of having great potential in various applications due to their outstanding properties such as high thermal conductivity and excellent chemical stability. Here, we present a template-assisted method of synthesizing vertically-aligned boron nitride nanotubes (VA-BNNTs) from vertically-aligned single-walled carbon nanotubes (VA-SWCNTs). This approach involves a chemical vapor deposition of boron nitride layers coating onto VA-SWCNTs first and subsequent removal of VA-SWCNTs by the oxidation in pure oxygen. The obtained VA-SWCNTs covered by BNNTs and VA-BNNTs arrays retain a highly ordered vertically aligned structure. The thermal stability of VA-SWCNTs was enhanced by coating with BNNTs. The structure and crystalline conditions were characterized by scanning electron microscope and transmission electron microscope. The chemical composition of samples was investigated by UV–Vis–NIR absorption spectroscopy and Raman spectroscopy. Boron nitride coating starts onto VA-SWCNTs from the top of the VA-SWCNTs array, which is confirmed by NanoSIMS characterization. Graphical abstract