Title :
Water oxidation of Multi-walled carbon nanotubes under moderate industrial condition
Author :
Liu, Ji ; Gong, Guozhuo ; Yang, Wenfeng ; Sun, Lianfeng
Author_Institution :
Beijing Municipal Inst. of Labor Protection, Beijing, China
Abstract :
The functionalization of Multi-walled carbon nanotubes (MWNTs) using water vapor at temperature of 600°C-1000°C is reported in this paper. Raman spectra and X-ray photoelectron spectrum (XPS) were used to characterize the products. The XPS spectra showed the existence of oxygen atoms in the functionalized MWNTs in the form of -C-O, -C=O groups, and the content of Oxygen atoms in the products can be raised from 2.2at.% to 4.7at.% as the heating temperature rise from 600°C to 800°C. The rising of peaks corresponding to the -C=O bond and the diminishing of peaks corresponding to the -C-O bond as the treating temperature rising showed the thermal enhanced oxidizing ability of water molecules, while little changes in the intensity of peaks in the D and 2D band with respect to the peak at G band in the Raman spectra showed that the process induced little defects to the MWNTs. Our experiments also shows that when the temperature are higher than 800°C, more defect would be induced and no MWNTs would be left when treated under 1000°C. Compared to the traditional solvent approaches, method shown in this paper shows the advantage of environmental friendly and keeping the morphology of MWNT aggregations unchanged.
Keywords :
Raman spectra; X-ray photoelectron spectra; aggregation; carbon nanotubes; heat treatment; nanofabrication; oxidation; water; 2D band; C; G band; Raman spectra; X-ray photoelectron spectra; XPS; aggregations; heating temperature; moderate industrial condition; morphology; multiwalled carbon nanotubes; oxygen atoms; temperature 600 degC to 1000 degC; thermal enhanced oxidizing ability; traditional solvent approach; water molecules; water oxidation; water vapor; Carbon; Carbon nanotubes; Dispersion; Mechanical factors; Polymers; Solvents; Temperature;
Conference_Titel :
Nanotechnology (IEEE-NANO), 2012 12th IEEE Conference on
Conference_Location :
Birmingham
Print_ISBN :
978-1-4673-2198-3
DOI :
10.1109/NANO.2012.6321989