Functionalization of single and multi-walled carbon nanotubes by chemical treatment

Akram Sh Ahmed

doi:10.30723/ijp.v16i39.103

Abstract

In this work we experimentally investigated SWCNTs and MWCNTs to increase their thermal conductivity and electrically functionalization process using different reagents ((nitric acid, HNO3 followed by acid treatment with H2SO4), then washed with deionized water (DW) and then treated with H2O2 via ultrasonic technique. Then repeated the steps with MWCNTs and compare their results in an effort to improve experimental conditions that efficiently differentiate the surface of the single walled carbon nanotubes (SWCNTs) and multi walled carbon nanotubesi(MWCNTs) that less nanotubes destroy and to enhance the properties of them and also to reduce aggregation in liquid. the results were prove by XRD, and infrared spectroscopy (FTIR). The FTIR spectrum shows the presence of carboxylic group after treatment with (acid oxidation and H2O2) and refers to Functionalization (SWCNTs) and (MWCNTs) on the surface wall microscopic images show surface adjustment on SWCNTs and ((MWCNTs)) structure after any treatment. AT last, a fully of SWCNTs and MWCNTSIwere obtained successfully accomplished with the reduction of the collapsed structure.

Highlights

Carbon nanotubes (CNTs) are composed of graphene layers which are rolled up cylindrically with diameter in the nanometer scale
The F‫ــ‬MWCNTS were confirmed by (FTIR) spectra of raw-SWCNTs show a wide peak at 3419.56 cm-1, that belong to re-extends O-H to the hydroxyl group of Fig. 3 (a) that attributed to fluctuation of carboxyl group
The frequency of carboxylation expansion at SWCNT was at 1693.38 cm-1, refer to that carboxyl groups formed by the partial oxidation some of carbon atoms on SWCNTS by HNO3 and H2SO4

Summary

Introduction

Carbon nanotubes (CNTs) are composed of graphene layers which are rolled up cylindrically with diameter in the nanometer scale. Oxygen containing groups are formed which are attractive to develop the interaction between carbon nanotubes and the solvent Matrix on surface of nanotubes by chemical processing such as nitric and sulfide acid [13].

Results

Conclusion