Electrochemical detection of nitrite based on the polythionine/carbon nanotube modified electrode

被引：44
作者：
Deng, Chunyan [1 ,2 ]
Chen, Jinzhuo [1 ]
Nie, Zhou [3 ]
Yang, Minghui [1 ]
Si, Shihui [1 ]
机构：
[1] Cent South Univ, Key Lab Resources Chem Nonferrous Met, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China
[2] Cent South Univ, Coll Pharmaceut Sci, Changsha 410083, Hunan, Peoples R China
[3] Hunan Univ, State Key Lab Chemo Biosensing & Chemometr, Coll Chem & Chem Engn, Changsha 410082, Hunan, Peoples R China
来源：
THIN SOLID FILMS | 2012年 / 520卷 / 23期
基金：
中国国家自然科学基金;
关键词：
Polythionine; Carbon nanotubes; Nitrite; Electrocatalytic sensor; ELECTROCATALYTIC REDUCTION; CARBON; NITRATE; OXIDATION; BEHAVIOR;
D O I：
10.1016/j.tsf.2012.07.010
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this paper, thionine was electro-polymerized onto the surface of carbon nanotube (CNT)-modified glassy carbon (GC) to fabricate the polythionine (PTH)/CNT/GC electrode. It was found that the electro-reduction current of nitrite was enhanced greatly at the PTH/CNT/GC electrode. It may be demonstrated that PTH was used as a mediator for electrocatalytic reduction of nitrite, and CNTs as an excellent nanomaterial can improve the electron transfer between the electrode and nitrite. Therefore, based on the synergic effect of PTH and CNTs, the PTH/CNT/GC electrode was employed to detect nitrite, and the high sensitivity of 5.81 mu A mM(-1), and the detection limit of 1.4x10(-6) M were obtained. Besides, the modified electrode showed an inherent stability, fast response time, and good anti-interference ability. These suggested that the PTH/CNT/GC electrode was favorable and reliable for the detection of nitrite. (C) 2012 Published by Elsevier B.V.
引用
收藏
页码：7026 / 7029
页数：4
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