文献类型：期刊文献

英文题名：Electrochemistry of nitrogen-doped carbon nanotubes (CN_x) with different nitrogen content and its application in simultaneous determination of dihydroxybenzene isomers

作者：Dong, Junping[1];Qu, Xiaomin[1];Wang, Lijun[2];Zhao, Chongjun[3];Xu, Jiaqiang[1]

机构：[1]Shanghai Univ, Dept Chem, Shanghai 200444, Peoples R China;[2]Shanghai Second Polytech Univ, Dept Environm Engn, Shanghai 201209, Peoples R China;[3]E China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China

年份：2008

卷号：20

期号：18

起止页码：1981

外文期刊名：ELECTROANALYSIS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000259859300006)】；

基金：The authors are grateful for the financial support from the Key Disciplines of Shanghai Municipal Education Commission (No.J50102) and the National Natural Science Foundation of China (No. 20504026).

语种：英文

外文关键词：nitrogen doping; carbon nanotube (CNT); modified electrode; dihydroxybenzene; isomer

摘要：The bamboo-shaped nitrogen-doped carbon nanotubes (CNx) with different nitrogen content were synthesized using, Fe-containing SBA-15 molecular sieve as catalyst with thermal decomposition. The CNx 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 CNx nanotubes surfaces due to the nitrogen doping and CNx nanotube with higher nitrogen content possesses lower graphitic ordering in the framework. Furthermore the effects of nitrogen content on the electrochemistry of CNx modified electrodes were investigated by cyclic voltammetry (CV). CNx modified electrodes exhibit better electrocatalytic activities to the oxidation of hydroquinone. Moreover CNx with lower nitrogen content is in favor of the electron transfer between dihydroxybenzene and electrode surface, while CNx with higher nitrogen content possesses high surface adsorptive ability. CNx modified electrodes can be applied to determine dihydroxybenzene isomers directly and simultaneously by linear sweep voltammetry technique without previous separation.