期刊
ELECTROCHIMICA ACTA
卷 56, 期 27, 页码 10069-10076出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.08.093
关键词
Carbon nanotube; Polyoxometalate; Nitrite; Poly(4-vinylpyridine)
资金
- National Natural Science Foundation of China [20903082]
- Department of Science and Technology of Zhejiang Province [2007F70041]
- Zhejiang Normal University [KJ20070107]
Multiwalled carbon nanotubes (MWCNTs) were grafted with poly(4-vinylpyridine) (PV4P) in aqueous solution by in situ free radical polymerization of 4-vinylpyridine. The as-prepared PV4P-g-MWCNTs hybrids can load phosphotungstic acid (PW) on a large scale by electrostatic interaction, which was characterized by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The as-prepared PWs/PV4P-g-MWCNTs hybrids were modified onto a carbon glassy electrode. Cyclic voltammograms (CVs) show that the electrochemical behavior of the modified electrode follows a four-one-electron surface-confined process of Keggin-type PWs. The modified electrode can be used as a nitrite sensor. The comparison of CVs shows that the response current of nitrite reduction at the electrode modified with PWs/PV4P-g-MWCNTs hybrids is 15 times higher than that of PWs/MWCNTs hybrids in a control experiment at 0.65V (vs. AgCl). The amperometric i-t curve for the electrode modified with PWs/PV4P-g-MWCNTs hybrids exhibits a linear concentration of NO2- ranged from 1.2 to 17.5 mu M with a detection limit of 0.2 mu M. (C) 2011 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据