Correlation between carbon nanotube microstructure and their catalytic efficiency towards the p-coumaric acid degradation

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• 作者：E. Fazio^a ; ^{enfazio@unime.it} ; E. Piperopoulos^b ; S.H. Abdul Rahim^b ; M. Lanza^c ; G. Faggio^d ; G. Mondio^a ; F. Neri^a ; A.M. Mezzasalma^a ; C. Milone^b ; S. Santangelo^e
• 关键词：Carbon nanotube ; CVD ; Structural properties ; X-ray photoemission spectroscopy ; Raman spectroscopy ; Catalysis
• 刊名：Current Applied Physics
• 出版年：2013
• 出版时间：June, 2013
• 年：2013
• 卷：13
• 期：4
• 页码：748-752
• 全文大小：642 K

文摘

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.