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Electrochemistry of Nitrogen‐Doped Carbon Nanotubes (CN x ) with Different Nitrogen Content and Its Application in Simultaneous Determination of Dihydroxybenzene Isomers
Author(s) -
Dong Junping,
Qu Xiaomin,
Wang Lijun,
Zhao Chongjun,
Xu Jiaqiang
Publication year - 2008
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.200804274
Subject(s) - raman spectroscopy , carbon nanotube , cyclic voltammetry , nitrogen , linear sweep voltammetry , scanning electron microscope , electrochemistry , materials science , transmission electron microscopy , inorganic chemistry , electrode , electrocatalyst , analytical chemistry (journal) , chemistry , nanotechnology , organic chemistry , physics , composite material , optics
The bamboo‐shaped nitrogen‐doped carbon nanotubes (CN x ) with different nitrogen content were synthesized using Fe‐containing SBA‐15 molecular sieve as catalyst with thermal decomposition. The CN x nanotubes prepared were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), powder X‐ray diffraction (XRD) and Raman spectroscopy. The results suggest that there are a larger amount of defective sites on CN x nanotubes surfaces due to the nitrogen doping and CN x nanotube with higher nitrogen content possesses lower graphitic ordering in the framework. Furthermore the effects of nitrogen content on the electrochemistry of CN x modified electrodes were investigated by cyclic voltammetry (CV). CN x modified electrodes exhibit better electrocatalytic activities to the oxidation of hydroquinone. Moreover CN x with lower nitrogen content is in favor of the electron transfer between dihydroxybenzene and electrode surface, while CN x with higher nitrogen content possesses high surface adsorptive ability. CN x modified electrodes can be applied to determine dihydroxybenzene isomers directly and simultaneously by linear sweep voltammetry technique without previous separation.