chemistry-education-2018-posters-abstracts

Chemistry Education 2018

Journal of Organic & Inorganic Chemistry

ISSN: 2472-1123

Page 69

August 27-28, 2018

Zurich, Switzerland

Edition of International Conference on

Chemistry Education

and Research

rc discharge method is a suitable method for the mass

production of single-walled nanotubes (SWNT). But this

process also produces lots of impurity like amorphous carbon,

graphite nanoparticles and metals particles (like Fe, Co, Ni or Y)

along with this nanotube structure. A simple, cost effective but

useful refinement technique for purification of SWNT produced

by arc-discharged method is discussed in this report. This novel

purification method is incorporated with air oxidation followed by

nitricacid treatments to remove theunwantedparticles. At thefirst

stage of this purification, oxidation of SWNT in air at temperatures

of 400°C for 4 h burns out the carbonaceous particles and in the

next step nitric acid (HNO3) reflux with for 8 h etches away the

catalytic metal particles. The approach of a selective oxidative

etching process is based on the fact that the burning temperature

of amorphous carbons is faster than that of carbon nanotube

which involved at the first stage of purification here and in the

second stage encrypted metal nano particles within SWNT can

be melted into the acid by heat treatment. These two processes

are complementary to each other to remove the carbonaceous

particles and transition metals. This whole purification process

provides a total yield of about 25-30 wt.% with the 77% purity

which was confirmed by the thermogravimetric and NIR analysis

respectively. The effects of each treatment in the purification

process is also discussed by characterizing the intermediate

products using thermogravimetric analysis, Raman spectroscopy,

vis-NIR spectroscopy, scanning electron microscopy and

transmission electron microscopy.

Purification of single wall carbon nanotube (SWNT) produced by

arc-discharged method by simple air oxidation and acid reflux

methods

Somdutta Singha

and

Swapankumar Ghosh

CSIR-Central Glass & Ceramic Research Institute, India

Indian Institute of Technology, India

J Org Inorg Chem 2018, Volume 4

DOI: 10.21767/2472-1123-C5-015