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Complex And New Modification Techniques Of Thiocholine Detection Electrodes With Carbon Nanotubes

文献类型： 外文期刊

作者： Zhang, Shu-Ping 1 ; Zheng, Yi 1 ; Shan, Lian-Gang 3 ; Shi, Li-Yi 2 ; Leng, Kai-Liang 4 ;

作者机构： 1.Shanghai Univ Sci & Technol, Coll Sci, Shanghai 200093, Peoples R China

2.Shanghai Univ, Shanghai 200444, Peoples R China

3.Jiangsu Food Sci Coll, Jiangsu 223003, Peoples R China

4.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China

关键词： modification technique;multi-walled carbon nanotubes (mwnts);layer-by-layer (lbl) self-assembly;thiocholine (tch) detection

期刊名称：APPLIED SURFACE SCIENCE （ 影响因子：6.707； 五年影响因子：5.905 ）

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收录情况： SCI

摘要： A new and complex modification technique of glassy carbon electrode (GCE) with multi-walled carbon nanotubes (MWNTs) was developed. Firstly, MWNTs were electro-deposited on GCE at 1.70 V for 2 h. Secondly, by layer-by-layer (LBL) self-assembly technique, a functional membrane of {PDDA/ MWNTs}_n, were fabricated by alternative immersion in 1% PDDA solution and 1 mg L~(-1) MWNTs dispersion either. As a result, the modified membrane with five (PDDA/MWNTs) bilayers have good sensitivity, stability, anti-fouling ability and catalytic activity for thiocholine (TCh) detection, the oxidation potential on the modified GCE was decreased almost by 50% while the peak current was increased almost by 100% compared with that on bare GCE. Meanwhile, it showed a low detection limit of less than 7.500 × 10~(-7) mol L~(-1) TCh.

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