Resumen

TEPALE-CORTES, Arturo et al. Multi-walled Carbon Nanotubes Synthesis by Arc Discharge Method in a Glass Chamber. J. Mex. Chem. Soc [online]. 2021, vol.65, n.4, pp.480-490.  Epub 28-Feb-2022. ISSN 1870-249X.  https://doi.org/10.29356/jmcs.v65i4.1486.

In the present paper, carbon nanotubes (CNTs) were synthesized by arc discharge method by vaporizing graphite rods in the presence of Ni and a Ni/Y mixture as catalysts for subsequent use in electrical energy storage and conversion devices. CNTs synthesis was carried out in a cylindrical glass reactor applying a controlled Argon flow of 1.43 cm3/min and a chamber pressure of 39 kPa. Carbon powder was collected from the reactor following chemical treatment with HCl solution at 1 M to remove the metallic impurities. Morphology obtained by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) showed multi-walled nanotubes (MWCNTs) with amorphous carbon particles attached to their surface. Fourier transform infrared (FT-IR) spectra presented bands at $\tilde{\nu }$ 1550 and 1200 cm-1 corresponding to the C=C bond characteristic to the CNTs skeleton; these bands were not present in pristine graphite. Electromagnetic absorbance was observed using ultraviolet-visible spectroscopy (UV-Vis) showing peaks at 204 and 256 nm related to sp2 hybridization characteristic for MWCNTs.

Palabras llave : CNT; arc discharge; catalyst; MWCNT; hybridization.

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