Dynamics of defects and surface structure formation in reticulated vitreous carbon

AUTOR(ES)

Gonçalves, E. S., Rezende, M. C., Ferreira, N. G.

FONTE

Brazilian Journal of Physics

DATA DE PUBLICAÇÃO

2006-06

RESUMO

Morphological and microstructure properties of reticulated vitreous carbon (RVC) were analyzed by scanning electron microscopy (SEM), micro-Raman spectroscopy and x-ray diffraction (XRD) techniques as a function of heat treatment temperature (HTT). Samples produced in the HTT range of 1000 to 2400 K have demonstrated a strong dependence of HTT in their structural order mainly attributed to the presence of hydrogen and oxygen (heteroatoms), originated from precursor. In this range, the material is changed from pyropolymer to carbon. The polyfurfuryl alcohol precursor has furanic groups and its cure originates methylenical bonds and sulphur atoms. At HTT higher than 1300 K, these atoms are gradually liberated from the material generating a discrete structure ordering.

Documentos Relacionados

• Electrochemical reversibility of reticulated vitreous carbon electrodes heat treated at different carbonization temperatures
• Removal of Cd+2 from aqueous solutions onto polypyrrole coated reticulated vitreous carbon eletrodes
• Removal of Cd+2 from aqueous solutions onto polypyrrole coated reticulated vitreous carbon eletrodes
• Removal of Cd2+ ion from diluted aqueous solutions by electrodeposition on reticulated vitreous carbon electrodes
• Removal of Cd2+ ion from diluted aqueous solutions by electrodeposition on reticulated vitreous carbon electrodes