TermehYousefi Amin, Bagheri Samira, Shinji Kawasaki, Rouhi Jalal, Rusop Mahmood Mohamad, Ikeda Shoichiro
ChECA IKohza, Department of Environmental & Green Technology (EGT), Malaysia Japan International Institute of Technology (MJIIT), University Technology Malaysia (UTM), Kuala Lumpur, Malaysia.
Nanotechnology & Catalysis Research Centre (NANOCAT), IPS Building, University of Malaya, 50603 Kuala Lumpur, Malaysia.
Biomed Res Int. 2014;2014:691537. doi: 10.1155/2014/691537. Epub 2014 Sep 2.
Among the wide range of renewable energy sources, the ever-increasing demand for electricity storage represents an emerging challenge. Utilizing carbon nanotubes (CNTs) for energy storage is closely being scrutinized due to the promising performance on top of their extraordinary features. In this work, well-aligned multilayer carbon nanotubes were successfully synthesized on a porous silicon (PSi) substrate in a fast process using renewable natural essential oil via chemical vapor deposition (CVD). Considering the influx of vaporized multilayer vertical carbon nanotubes (MVCNTs) to the PSi, the diameter distribution increased as the flow rate decreased in the reactor. Raman spectroscopy results indicated that the crystalline quality of the carbon nanotubes structure exhibits no major variation despite changes in the flow rate. Fourier transform infrared (FT-IR) spectra confirmed the hexagonal structure of the carbon nanotubes because of the presence of a peak corresponding to the carbon double bond. Field emission scanning electron microscopy (FESEM) images showed multilayer nanotubes, each with different diameters with long and straight multiwall tubes. Moreover, the temperature programmed desorption (TPD) method has been used to analyze the hydrogen storage properties of MVCNTs, which indicates that hydrogen adsorption sites exist on the synthesized multilayer CNTs.
在众多可再生能源中，对蓄电日益增长的需求是一项新出现的挑战。由于碳纳米管（CNTs）具备卓越特性且性能前景广阔，其用于储能正受到密切审视。在这项工作中，通过化学气相沉积（CVD），利用可再生天然香精油，在快速过程中于多孔硅（PSi）衬底上成功合成了排列良好的多层碳纳米管。考虑到蒸发的多层垂直碳纳米管（MVCNTs）流入PSi，随着反应器中流速降低，直径分布增加。拉曼光谱结果表明，尽管流速改变，碳纳米管结构的晶体质量并无重大变化。傅里叶变换红外（FT - IR）光谱因存在对应碳双键的峰而证实了碳纳米管的六边形结构。场发射扫描电子显微镜（FESEM）图像显示了多层纳米管，每层直径不同，为长而直的多壁管。此外，程序升温脱附（TPD）方法已用于分析MVCNTs的储氢性能，这表明在合成的多层CNTs上存在氢吸附位点。
