Electrochemical Properties of Ag@iron Oxide Nanocomposite for Application as Nitrate Sensor

被引：22
作者：
Bonyani, Maryam [1 ,2 ]
Mirzaei, Ali [1 ,2 ]
Leonardi, Salvatore G. [1 ]
Bonavita, Anna [1 ]
Neri, Giovanni [1 ]
机构：
[1] Univ Messina, Dept Elect Engn Chem & Ind Engn, I-98166 Messina, Italy
[2] Shiraz Univ, Dept Mat Sci & Engn, Shiraz, Iran
来源：
ELECTROANALYSIS | 2015年 / 27卷 / 11期
关键词：
Nanocomposites; Silver nanoparticles; Ag@iron oxide; Electrochemical nitrate sensor; SILVER NANOPARTICLES; ELECTRODE; NITRITE; FILMS; SHAPE; SIZE;
D O I：
10.1002/elan.201500240
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Ag@iron oxide nanocomposite powders were synthesized via a two-step chemical method. Characterization by UV-Vis, XRD, SEM-EDX and TEM revealed they are composed of nanosized crystalline silver particles in strict contact with amorphous iron oxide(s). The electrochemical behavior of the synthesized Ag@iron oxide composite was investigated by cyclic voltammetry. Compared with the single phase-modified electrodes, the Ag@iron oxide/SPCE electrode exhibits an enhanced cathodic current in response to the target analyte, due to a synergistic effect between Ag crystallites and amorphous iron oxide nanoparticles. An amperometric sensor for detection of nitrate based on Ag@iron oxide modified screen-printed electrode (Ag@iron oxide/SPCE) has been fabricated, showing a good sensitivity (663 mu AmM(-1)cm(-2)) and a detection limit of 30 mu M.
引用
收藏
页码：2654 / 2662
页数：9
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