The Effect of Oxidants on the Formation of Multi-Walled Carbon Nanotube Buckypaper

Abstract

In the present study, we report the systematic investigation of the effect of chemical oxidation on the structure of multi-walled carbon nanotubes (MWCNTs) and multi-walled carbon nanotubes buckypaper. The chemical oxidation of multi-walled carbon nanotubes was performed via using three types of chemical solutions: nitric acid, sulfuric acid/nitric acid (3/1) and ammonium hydroxide/hydrogen peroxide (1/1). The surfaces of the multi-walled carbon nanotubes were modified by forming Carboxyl and other functional groups. Flexible multi-walled carbon nanotubes buckypapers were then produced by vacuum filtration techniques from functionalized multi-walled carbon nanotubes. The characteristic properties of multi-walled carbon nanotubes specimens were investigated via Raman, and Fourier Transform Infrared Spectroscopies. The thermal properties and morphology of multi-walled carbon nanotubes were also studied byThermogravimetric Analysis and Field Emission Scanning Electron Microscopy techniques.

Comparison microstructure and sliding wear properties of nickel–cobalt/CNT composite coatings by DC, PC and PRC current electrodeposition

“…Chemical oxidation of MWCNTs was carried out with a mixture of H 2 SO 4 and HNO 3 acids in the ratio of 3:1 for 3 h after annealing and treating in HCl acid for impurity removing. Details of MWCNT functionalization can be found in a previous (work of our group) [24].…”

Double phase tinoxide/tin/MWCNT nanocomposite negative electrodes for lithium microbatteries

“…As carbon matrix, MWCNT buckypapers are popular because they offer unique features such as flexibility, ability to be free-standing, having porous structure and good mechanical stability. Carbon nano tube paper, also called buckypapers, are self-supporting networks of entangled CNT assemblies arranged in a random fashion and held together by van der Waals interactions at the tube-tube junctions [10]. In this study; SnO 2 /Sn double phase structure formed on the MWCNT buckypapers via thermal evaporation and subsequent plasma oxidation.…”

The Superior Surface Discharge Capacity of Core-Shell Tinoxide/Multi Walled Carbon Nanotube Nanocomposite Anodes for Li-Ion Batteries

“…Purication and chemical oxidation of MWCNTs was carried out with dierent oxidation agents [9]. Aqueous MWCNTs suspension was sonicated for 1 h to form a well dispersed suspension which was subsequently vacuum ltered through PVDF membrane lters of 220 nm pore size to form buckypapers.…”