Papadopoulou Foteini-Maria, Soulis Spyros, Trompeta Aikaterini-Flora A, Charitidis Costas A
Research Lab of Advanced, Composite, Nanomaterials and Nanotechnology (R-NanoLab), School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou Str., Zographos, 15780 Athens, Greece.
Materials (Basel). 2024 Nov 27;17(23):5812. doi: 10.3390/ma17235812.
In this paper, we explore a straightforward two-step method to produce high-purity, vertically aligned multi-walled carbon nanofibres (MWCNFs) via chemical vapor deposition (CVD). Two distinct solutions are utilized for this CVD method: a catalytic solution consisting of ferrocene and acetonitrile (ACN) and a carbon source solution with camphor and ACN. The vapors of the catalytic solution inserted in the reaction chamber through external boiling result in a floating catalyst CVD approach that produces vertically aligned CNFs in a consistent manner. CNFs are grown in a conventional CVD horizontal reactor at 850 °C under atmospheric pressure and characterized by Raman spectroscopy, scanning and transmission electron microscopy (SEM and TEM), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). Coating the MWCNTs with polymethyl methacrylate (PMMA) while still on the Si substrate retains the structure and results in a flexible, conductive thin film suitable for flexible electrodes. The film is 62 μm thick and stable in aqueous solutions, capable of withstanding further processing, such as electropolymerization with polyaniline, to be used for energy storage applications.
在本文中，我们探索了一种简单的两步法，通过化学气相沉积（CVD）制备高纯度、垂直排列的多壁碳纳米纤维（MWCNF）。这种CVD方法使用了两种不同的溶液：一种由二茂铁和乙腈（ACN）组成的催化溶液，以及一种含有樟脑和ACN的碳源溶液。通过外部沸腾将催化溶液的蒸汽插入反应室，从而形成一种浮动催化剂CVD方法，能够以一致的方式制备垂直排列的CNF。CNF在传统的CVD卧式反应器中于850℃常压下生长，并通过拉曼光谱、扫描和透射电子显微镜（SEM和TEM）、X射线衍射（XRD）和热重分析（TGA）进行表征。在MWCNT仍在硅基板上时用聚甲基丙烯酸甲酯（PMMA）进行涂层，可保留其结构，并得到一种适用于柔性电极的柔性导电薄膜。该薄膜厚度为62μm，在水溶液中稳定，能够承受进一步的加工，如与聚苯胺进行电聚合，以用于能量存储应用。
