Artículos de revistas
Purification and functionalization of carbon nanotubes by classical and advanced oxidation processes
Fecha
2009-12Registro en:
Escobar, Mariano Martin; Goyanes, Silvia Nair; Corcuera, M. A.; Eceiza, A.; Mondragon, I.; et al.; Purification and functionalization of carbon nanotubes by classical and advanced oxidation processes; American Scientific Publishers; Journal of Nanoscience and Nanotechnology; 9; 10; 12-2009; 6228-6233
1533-4880
CONICET Digital
CONICET
Autor
Escobar, Mariano Martin
Goyanes, Silvia Nair
Corcuera, M. A.
Eceiza, A.
Mondragon, I.
Rubiolo, Gerardo Hector
Candal, Roberto Jorge
Resumen
Advanced oxidation technologies (AOT) were applied for the production of accurately controlled oxidized multi-walled carbon nanotubes. Fenton process is effective to get carboxylic (-COO - or -COOH) and OH groups on the surface of carbon nanotubes while Photofenton and UV/H 2O 2 processes mostly produce OH groups on surface of multiwalled carbon nanotubes (MWCNT). All of them preserve the structure of MWCNT allowing to achieve accurately controlled oxidized MWCNT. Fourier transform infrared spectroscopy (FTIR) and thermogravimetical analysis (TGA) show that the acid treatment is the more efficient technique to generate COOH groups on MWCNT surface. However, this chemical technique generates strong damages on the MWCNT structure, as demonstrated by TGA, field emission scanning electron microscopy and transmission electron microscopy results. Copyright © 2009 American Scientific Publishers.