Multiwall carbon nanotubes decorated with NiFe2O4 magnetic nanoparticles, a new catalyst for voltammetric determination of cefixime
Multiwall carbon nanotubes decorated with NiFe2O4 magnetic nanoparticles, a new catalyst for voltammetric determination of cefixime
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DOI：
10.1016/j.colsurfb.2012.09.037
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发表时间：
2013-02-01
影响因子：
5.8
通讯作者：
Allafchian, Ali R.
中科院分区：
文献类型：
--
作者：
Ensafi, Ali A.;Allafchian, Ali R.
用合成的NiFe 2 O 4磁性纳米颗粒修饰多壁碳纳米管。采用红外光谱、透射电子显微镜、原子力显微镜和电化学阻抗谱等技术对材料进行了表征。采用NiFe 2 O 4磁性纳米粒子修饰多壁碳纳米管作为伏安法测定头孢克肟的新介质。在pH 8.0的最佳条件下，头孢克肟在修饰电极表面的氧化电位为850 mV。线性扫描伏安法表现出两个广泛的线性动态范围为0.1-100和100-600 μ mol L-1头孢克肟。检测限为0.02 μ mol L ~（-1）头孢克肟。该修饰电极用于真实的样品中头孢克肟的测定，显示出良好的灵敏度、选择性和稳定性。(c)2012爱思唯尔有限公司版权所有。
Multiwall carbon nanotubes were decorated with synthesized NiFe2O4 magnetic nanoparticles. The new materials were characterized with different techniques such as transform infrared spectroscopy, transmission electron microscopy, atomic force microscopy and electrochemical impedance spectroscopy. The multiwall carbon nanotubes decorated with NiFe2O4 magnetic nanoparticles was used as a new mediator for the voltammetric determination of cefixime. Under the optimum conditions at pH 8.0, the oxidation of cefixime was occurred at 850 mV at the surface of the modified electrode. Linear sweep voltammetry exhibited two wide linear dynamic ranges of 0.1-100 and 100-600 mu mol L-1 cefixime. The detection limit was found to be 0.02 mu mol L-1 cefixime. Finally, the modified electrode showed good sensitivity, selectivity and stability for the determination of cefixime in real samples. (c) 2012 Elsevier B.V. All rights reserved.