Fast Synthesis of Multilayer Carbon Nanotubes from Camphor Oil as an Energy Storage Material

Abstract

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.

Effects of Graphene Nanoplatelets and Multiwall Carbon Nanotubes on the Structure and Mechanical Properties of Poly(lactic acid) Composites: A Comparative Study

“…The IR spectrum of carbon nanotubes (Figure 2), showed intense bands corresponding to stretching vibrations of -OH, C=O and C-O, together with new bands corresponding to carboxyl groups (-COOH): ν(C=O) at 1741 cm −1 and C=O bond at 1028 cm −1 , indicating a MWCNTs surface functionalization. These typical bands, with slight variations in wavelength, can be found for carbon nanotube oxidized in different ways [35].…”

Magnesium oxide as a heterogeneous catalyst support

“…Fabrication of hydromagnesite using different morphologies including needle, nest, sheets, flowers, and spheres has been designated through hydrothermal and precipitation methods , TermehYousefi et al 2014. Large sheets or petals like hydromagnesite have been largely reported to go through self-assembly in order to make the nest or flower or spherical morphology of numerous micron dimensions (TermehYousefi et al 2014).…”

“…Large sheets or petals like hydromagnesite have been largely reported to go through self-assembly in order to make the nest or flower or spherical morphology of numerous micron dimensions (TermehYousefi et al 2014). …”

Synthesis and functionalization of green carbon as a Pt catalyst support for the oxygen reduction reaction

“…Aerogels, xerogels and other mesoporous carbon supports, provide the high surface area for the metal catalyst [4e8]. Carbon nanotubes used as 3D structural catalytic support confers high stability and high catalytic properties of materials [9,10]. In recent years graphene and WO 3 had significant interest as catalytic support.…”