Electrochemical determination of nitrite using a gold nanoparticles-modifled glassy carbon electrode prepared by the seed-inediated growth technique

被引:71
作者
Cui, Yanping [1 ]
Yang, Changzhu [1 ]
Zeng, Wei [1 ]
Oyama, Munetaka [2 ]
Pu, Wenhong [1 ]
Zhang, Jingdong [1 ]
机构
[1] Huazhong Univ Sci & Technol, Coll Environm Sci & Engn, Wuhan 430074, Peoples R China
[2] Kyoto Univ, Int Innovat Ctr, Div Res Initiat, Kyoto 615, Japan
关键词
D O I
10.2116/analsci.23.1421
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Seed-mediated growth of gold nanoparticles on glassy carbon (GC) surfaces was developed. The field emission scanning electron microscopy (FE-SEM) and electrochemical characterization confirmed the effective attachment of gold nanoparticles on GC surface with such a wet-chemical method. The as-prepared gold nanoparticles attached glassy carbon electrode (Au/GCE) presented excellent catalytic ability toward the oxidation of nitrite. Compared with bare GCE and planar gold electrode, the Au/GCE obviously decreased the overpotential of nitrite oxidation and improved the peak current. The catalytic current was found to be linearly proportional to the nitrite concentration in the range of 1 x 10(-5) - x 10(-3) M, with a detection limit of 2.4 x 10(-6) M. The Au/GCE was successfully applied to the electrochemical determination of nitrite in a real wastewater sample, showing excellent stability and anti-interference ability.
引用
收藏
页码:1421 / 1425
页数:5
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