Abstract In this study, we report a simple method for the synthesis of layered carbide-derived carbon (CDC) nanostructures by immersion of the Ti2AlC MAX phase powder in hydrofluoric acid (HF) solutions. The Ti2AlC MAX phase powders were synthesized by the ball-milling of the titanium, aluminum, and carbon powders. Then, the as-synthesized powders were immersed in the different concentrations of HF solutions (10 and 40 wt.%) at different times (2, 24, and 48 h). Results showed that the titanium and aluminum were extracted from the structure of Ti2AlC MAX phase by immersion in the HF solution. The structural and morphological investigation of the obtained CDCs were carried out by X-ray diffraction (XRD), Raman spectroscopy, and field emission scanning electron microscopy (FESEM). FESEM images proved the formation of the layered morphologies of the CDC nanostructures achieved after etching of the Ti2AlC MAX phase powder in HF solution. XRD and Raman spectroscopy results were in good agreement with the FESEM images. Also, results indicated that lower concentration of HF solution was more proper for the production of the layered CDC nanostructures, compared to the higher concentration of HF solution.

中文翻译：

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通过 HF 蚀刻 Ti2AlC 获得的层状碳化物衍生碳纳米结构的结构和形态表征

摘要 在这项研究中，我们报告了一种通过将 Ti2AlC MAX 相粉末浸入氢氟酸 (HF) 溶液中来合成层状碳化物衍生碳 (CDC) 纳米结构的简单方法。Ti2AlC MAX 相粉末是通过球磨钛、铝和碳粉末合成的。然后，将合成的粉末在不同时间（2、24 和 48 小时）浸入不同浓度的 HF 溶液（10 和 40 重量％）中。结果表明，通过浸入 HF 溶液，钛和铝从 Ti2AlC MAX 相的结构中提取出来。通过X射线衍射（XRD）、拉曼光谱和场发射扫描电子显微镜（FESEM）对所得CDCs进行结构和形态研究。FESEM 图像证明了在 HF 溶液中蚀刻 Ti2AlC MAX 相粉末后形成的 CDC 纳米结构的层状形态。XRD 和拉曼光谱结果与 FESEM 图像非常吻合。此外，结果表明，与较高浓度的 HF 溶液相比，较低浓度的 HF 溶液更适合生产层状 CDC 纳米结构。