铜箔作为生长氮掺杂碳纳米管的衬底。

IF 2.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
Brenda Verónica Padilla-Teniente, Juan L Fajardo-Díaz, Luis A Macclesh Del Pino Pérez, Florentino López Urías, Emilio Muñoz-Sandoval
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引用次数: 0

摘要

利用气溶胶辅助化学气相沉积(AACVD)方法,在多种石墨碳基体中制备了铁基和铜基混合纳米颗粒(NPs)。以薄铜箔为底物,在750 ~ 950℃的温度下对二茂铁和苄胺进行热解。得到了三种类型的杂化材料:1)750℃时包裹在石墨碳中的Fe3C和Cu NPs; 2) 800℃时表面附着高密度的氮掺杂多壁碳纳米管(N-MWCNTs); 3) 850℃以上时被NPs包裹的大管状缺陷纤维型材料。后向散射扫描电子显微镜(SEM)和能量色散光谱(EDS)显示了每种情况下获得的NPs的组成,形态和大小。拉曼光谱表征显示典型的g波段和d波段,ID/IG值在0.79 ~ 0.88之间,这与拓扑缺陷和高度缺陷的管状石墨结构的形成有关。我们还将g波段向较低值的移动与通过提高合成温度获得的结构类型相关联。用透射电镜观察了层间石墨距离以及Fe3C-和Cu-NP晶体平面。最后,我们提出了合成过程中不同杂化材料的形成机理。讨论了电化学阻抗谱(EIS)结果。我们的样品具有独特的性能,可以用作能量存储设备中的分子传感器或电极,为未来的应用开辟了令人兴奋的可能性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Copper foils as substrates for growing nitrogen-doped carbon nanotubes.

Hybrid Fe- and Cu-based nanoparticles (NPs) embedded in a variety of graphitic carbon matrices were produced using an aerosol-assisted chemical vapor deposition method. A thin copper foil was used as the substrate, and ferrocene and benzylamine were pyrolyzed at temperatures ranging from 750 °C to 950 °C. Three types of hybrid materials were obtained: (1) Fe3C and Cu NPs encapsulated in graphitic carbon at 750 °C, (2) nitrogen-doped multiwalled carbon nanotubes with a high density of NPs attached to their surface at 800 °C, and (3) a large tubular-defective fiber-type material surrounded by NPs above 850 °C. Backscattering scanning electron microscopy and energy dispersive spectroscopy revealed the composition, morphology, and size of the NPs obtained in each case. Raman spectroscopy characterizations revealed the typical G-band and D-band withID/IGvalues ranging from 0.79 to 0.88, which are related to the formation of topological defects and highly defective tubule-like graphitic structures. We also correlated the shift of the G-band to lower values with the type of structure obtained by increasing synthesis temperature. The interlayer graphitic distance and Fe3C- and Cu-NP crystal planes were examined using transmission electron microscopy. Finally, we proposed a formation mechanism for the different hybrid materials involved in the synthesis. Electrochemical impedance spectroscopy results are discussed. Our samples, with their unique properties, can be used as molecular sensors or electrodes in energy storage devices, opening up exciting possibilities for future applications.

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来源期刊
Nanotechnology
Nanotechnology 工程技术-材料科学:综合
CiteScore
7.10
自引率
5.70%
发文量
820
审稿时长
2.5 months
期刊介绍: The journal aims to publish papers at the forefront of nanoscale science and technology and especially those of an interdisciplinary nature. Here, nanotechnology is taken to include the ability to individually address, control, and modify structures, materials and devices with nanometre precision, and the synthesis of such structures into systems of micro- and macroscopic dimensions such as MEMS based devices. It encompasses the understanding of the fundamental physics, chemistry, biology and technology of nanometre-scale objects and how such objects can be used in the areas of computation, sensors, nanostructured materials and nano-biotechnology.
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