期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 166, 期 -, 页码 601-607出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2012.03.018
关键词
Lanthanum; Multiwalled carbon nanotube; Ascorbic acid; Dopamine; Uric acid; Nitrite
资金
- National Natural Science Foundation of China [20675064]
- Ministry of Education of China [708073]
- Special and Research Fund for Doctoral Program of Higher Education [20100182110015]
- Natural Science Foundation of Chongqing City, China [CSTC-2011BA7003, 2009BA1003]
- High Technology Project Foundation of Southwest University, China [XSGX 02]
A simple strategy for simultaneous determination of ascorbic acid (AA), dopamine (DA), uric acid (UA) and nitrite ion (NO2-) based on lanthanum-multiwalled carbon nanotube nanocomposites (La-MWCNTs) modified glassy carbon electrode (GCE) was reported in this paper. Due to the formation of catalytical activity centers, La-MWCNTs display high catalytic activity and selectivity toward the oxidation of DA, AA, UA, and NO2-. And the porosity of La-MWCNTs film and the synergistic effects between lanthanum and MWCNTs were considered as the main reasons of the successfully simultaneous detection. Moreover, because of the excellent film forming ability of the La-MWCNTs nanocomposites, the sensors demonstrated good stability. Cyclic voltammetry, chronoamperometric, transmission electron microscopy and Fourier transformed infrared spectroscopy were employed to characterize the performance and microstructure of the sensor. Under optimal conditions, the linear response range for AA, DA, UA and NO2- are 0.40 mu M-0.71 mM, 0.04 mu M-0.89 mM, 0.04 mu M-0.81 mM and 0.40 mu M-0.71 mM, respectively, and the corresponding detection limits are 140 nM, 13 nM, 15 nM and 130 nM (S/N = 3). (C) 2012 Elsevier B.V. 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