Author/Authors :
Fazio، نويسنده , , E. and Piperopoulos، نويسنده , , E. and Abdul Rahim، نويسنده , , S.H. and Lanza، نويسنده , , M. and Faggio، نويسنده , , G. and Mondio، نويسنده , , G. G. Neri Serneri، نويسنده , , F. and Mezzasalma، نويسنده , , A.M. and Milone، نويسنده , , C. and Santangelo، نويسنده , , S.، نويسنده ,
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.
Keywords :
Carbon nanotube , CVD , Catalysis , Structural properties , Raman spectroscopy , X-ray photoemission spectroscopy
