Overoxidized polypyrrole film directed single-walled carbon nanotubes immobilization on glassy carbon electrode and its sensing applications
Overoxidized polypyrrole film directed single-walled carbon nanotubes immobilization on glassy carbon electrode and its sensing applications
复制标题
过氧化聚吡咯薄膜定向单壁碳纳米管固定玻碳电极及其传感应用
DOI：
10.1016/j.bios.2007.02.001
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发表时间：
2007-06-15
影响因子：
12.6
通讯作者：
Lin, Xiangqin
中科院分区：
文献类型：
--
作者：
Li, Yongxin;Wang, Po;Lin, Xiangqin
本文在玻碳电极(GCE)上制备了单壁碳纳米管(SWNTs)修饰的过氧化聚吡咯(PPyox)薄膜。在含有十二烷基硫酸钠(十二烷基硫酸钠)和碳纳米管的溶液中加入电活性单体吡咯。然后在碳纳米管表面进行电聚合，得到了一种新型的以碳纳米管为取向的导电聚合物/碳纳米管复合膜。最后，将得到的聚吡咯(PPY)/单壁碳纳米管复合薄膜修饰的GCE在+1.8V的电位下进行氧化。结果表明，该复合薄膜修饰的GCE对亚硝酸盐、抗坏血酸(AA)、多巴胺(DA)和尿酸(UA)等物种具有良好的电催化性能，可作为一种新的传感器应用于实际应用。与以往的碳纳米管修饰电极相比，聚吡咯和十二烷基硫酸钠将碳纳米管定向到修饰层的外侧，这使得薄膜更容易导电。此外，该膜修饰电极具有更高的稳定性、选择性和适用性。(C)2007 Elsevier B.V.保留所有权利。
In this paper, the films of overoxidized polypyrrole (PPyox) directed single-walled carbon nanotubes (SWNTs) have been electrochemically coated onto glassy carbon electrode (GCE). Electroactive monomer pyrrole was added into the solution containing sodium dodecyl sulfate (SDS) and SWNTs. Then, electropolymerization was proceeded at the surface of GCE, and a novel kind of conducting polymer/carbon nanotubes (CNTs) composite film with the orientation of CNTs were obtained correspondingly. Finally, this obtained polypyrrole (PPY)/SWNTs film modified GCE was oxidized at a potential of +1.8 V. It can be found that this proposed PPyox/SWNTs composite film modified GCE exhibited excellent electrocatalytie properties for some species such as nitrite, ascorbic acid (AA), dopamine (DA) and uric acid (UA), and could be used as a new sensor for practical applications. Compared with previous CNTs modified electrodes, SWNTs were oriented towards the outside of modified layer by PPyox and SDS, which made the film easily conductive. Moreover, this proposed film modified electrode was more stable, selective and applicable. (c) 2007 Elsevier B.V. All rights reserved.