Abstract The combination of different nanomaterials to achieve particular applications is a topic with an increasing impact on diverse areas of nanotechnology. In particular, the material of La2Zr2O7 (LZO) and NiO could be employed as a source of catalyst for carbon nanotube fabrication. In this work, the Ni/LZO material was utilized to fabricate nitrogen-doped multiwalled carbon nanotube (N-MWCNTs). The N-MWCNTs were produced at 850 °C by the aerosol assisted catalytic chemical vapor deposition method using benzylamine as the sole carbon and nitrogen precursor. The samples were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, and vibrating sample magnetometry. Before the synthesis of N-MWCNTs, NiO was reduced to Ni to act as a catalyst and LZO as support. N-MWCNTs exhibited the typical feature bamboo shape morphology with small nanoparticles anchored inside and on its surface. The electrochemical studies show interesting results about charge capacity and a hydroquinone/quinone redox process of oxygen functionalities. The magnetic properties of N-MWCNTs showed a ferromagnetic behavior with a saturated magnetization of 43 emu/g at 0.2 T.

中文翻译：

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使用 Ni/La2Zr2O7 作为催化剂的氮掺杂碳纳米管的生长：电化学和磁性研究

摘要 结合不同纳米材料以实现特定应用是一个对纳米技术各个领域影响越来越大的话题。特别是，La2Zr2O7 (LZO) 和 NiO 材料可用作碳纳米管制造的催化剂来源。在这项工作中，Ni/LZO 材料用于制造掺氮多壁碳纳米管 (N-MWCNTs)。N-MWCNTs是在850°C下通过气溶胶辅助催化化学气相沉积方法生产的，使用苄胺作为唯一的碳和氮前体。通过X射线衍射、扫描电子显微镜、透射电子显微镜、拉曼光谱、X射线光电子能谱、热重分析和振动样品磁强法对样品进行表征。在合成 N-MWCNTs 之前，NiO 被还原为 Ni 作为催化剂，LZO 作为载体。N-MWCNTs表现出典型的竹状形态特征，内部和表面固定有小的纳米颗粒。电化学研究显示了有关电荷容量和氧官能团的氢醌/醌氧化还原过程的有趣结果。N-MWCNTs 的磁性表现出铁磁行为，在 0.2 T 时饱和磁化强度为 43 emu/g。