Synthesis of carbon nanotubes by arc-discharge and chemical vapor deposition method with analysis of its morphology, dispersion and functionalization characteristics

Abstract

In this paper Multi-walled carbon nanotubes are synthesized by arc-discharge and chemical vapor decomposition methods. Multi-walled carbon nanotubes are synthesized on thin film of nickel sputtered on silicon substrate by thermal chemical vapor deposition of acetylene at a temperature of 750°C. The flow of current in arc-discharge method varies in the range 50-200 Amps. Further arc-synthesized carbon nanotubes are characterized by X-Ray diffraction (XRD), Scanning electron microscopy (SEM), Transmission electron microscopy (TEM) and the results are compared with nanotubes grown by chemical vapor deposition method. XRD result shows a characteristic peak (002) at 26.54° corresponding to presence of carbon nanotubes. SEM and TEM results give morphology of as-synthesized multiwalled nanotubes. TEM results indicate synthesis of well graphitized carbon nanotubes by arc-discharge method. Dispersion of arc synthesized nanotubes in SDS solution under the effect of different sonication time is studied. Dispersion of nanotubes in SDS solution is analyzed by using UV-vis-NIRspectroscopy and it shows an absorption peak at 260 nm. It was found that with the increase in sonication time, the absorption peak in UV-vis-NIR spectra will increase and optimum sonication time was 2 hour. Functionalization of synthesized carbon nanotubes by H 2 SO 4 and HNO 3 acids has been studied and analysis of functionalized groups has been done by using FT-IR spectroscopy and compared and the results are reported in this paper. FT-IR spectroscopy verifies the presence of carboxylic groups attached to carbon nanotubes. These functional groups may change properties of carbon nanotubes and may be used in vast applications of carbon nanotubes.Index Terms-Electron microscopy, FT-IR spectrsocopy, multi-walled carbon nanotube, X-ray diffraction.

The State of HiPco Single-Walled Carbon Nanotubes in 2019

“…As-synthesized SWCNTs have also been further analyzed via various methods of separation to develop enriched ensembles of metallic-and semiconducting-SWCNTs [7], to further facilitate research and a move from the lab to the retail market. Synthesis of SWCNTs has thus always been key in progressing this field of research, with various techniques having been developed for this, including arc discharge [8,9], laser ablation [10,11], and chemical vapor deposition (CVD) [12][13][14].…”

Synthesis and characterization of long-CNTs by electrical arc discharge in deionized water and NaCl solution

“…In all samples a strong peak near 2θ = 26° are related to (002) planes of hexagonal graphite structure. In some literatures this peak has been related to the formation of multi wall CNTs [20,24,25]. As SEM results revealed, CNTs diameter in sample #2 is greater than samples #4 and #5.…”

“…XRD analysis revealed the hexagonal graphite structures with enhanced d-spacing. It can be concluded that arc discharge in liquid is a very cheap method for production of CNTs and the best concentration of sodium chloride solution in DI water is 0.3 M [25].…”

Emergence in the functionalized carbon nanotubes as smart nanocarriers for drug delivery applications

“…4.3. This method has the advantage of producing CNTs of superior quality with very high tensile strength (Sharma et al, 2015). However, in the LA technique the CNTs are produced by hitting a graphitic object with a high-speed laser beam, as shown in Fig.…”