Pristine and annealed multi-walled C nanotubes are preliminarily tested as catalysts towards the degradation of p-coumaric acid with better performances than the widely used activated carbon. In order to clarify the origin of their different catalytic efficiency, the samples are analysed by means of high-resolution transmission electron microscopy, X-ray photoemission, reflection electron energy loss and micro-Raman spectroscopy. Chemical composition, mass density, bonding configurations and threefold- to fourfold-coordinated carbon bonding ratios are determined. The comparative discussion of the results obtained leads to attribute the higher catalytic activity of the pristine nanotubes to their larger sp2/sp3 carbon bonding fraction and greater amount of oxygen containing functional groups.
Correlation between carbon nanotube microstructure and their catalytic efficiency towards the p-coumaric acid degradation / Fazio, E., Piperopoulos, E., Abdul Rahim, S.H., Lanza, M., Faggio, G., Mondio, G., Neri, F., Mezzasalma, A.M., Milone, C., Santangelo, S.. - In: CURRENT APPLIED PHYSICS. - ISSN 1567-1739. - 13:4(2013), pp. 748-752. [10.1016/j.cap.2012.11.016]
Correlation between carbon nanotube microstructure and their catalytic efficiency towards the p-coumaric acid degradation
G. Faggio;Santangelo S
2013-01-01
Abstract
Pristine and annealed multi-walled C nanotubes are preliminarily tested as catalysts towards the degradation of p-coumaric acid with better performances than the widely used activated carbon. In order to clarify the origin of their different catalytic efficiency, the samples are analysed by means of high-resolution transmission electron microscopy, X-ray photoemission, reflection electron energy loss and micro-Raman spectroscopy. Chemical composition, mass density, bonding configurations and threefold- to fourfold-coordinated carbon bonding ratios are determined. The comparative discussion of the results obtained leads to attribute the higher catalytic activity of the pristine nanotubes to their larger sp2/sp3 carbon bonding fraction and greater amount of oxygen containing functional groups.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
