A novel electrochemical sensor based on Fe2O3 nanoparticles/N-doped graphene for electrocatalytic oxidation of L-cysteine

被引：22

作者：

Yang, Suling ^{[1
]}

Li, Gang ^{[1
]}

Wang, Guifang ^{[1
]}

Deng, Dehua ^{[1
]}

Qu, Lingbo ^{[1
,2
]}

机构：

[1] Anyang Normal Univ, Coll Chem & Chem Engn, Anyang 455002, Peoples R China

[2] Henan Univ Technol, Chem & Chem Engn Sch, Zhengzhou 450001, Peoples R China

来源：

JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2015年 / 19卷 / 12期

基金：

中国国家自然科学基金;

关键词：

Fe2O3; nanoparticles; N-doped graphene; L-cysteine; Electroanalysis; ELECTRODE; COMPOSITE; POLYMER; HYBRID; IONS; SIZE;

D O I：

10.1007/s10008-015-2980-y

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

A novel electrochemical sensor based on Fe2O3 nanoparticles supported on N-doped graphene (Fe(2)O(3)NPs/N-GR) has been fabricated for electrocatalytic oxidation and detection of L-cysteine. The Fe(2)O(3)NPs/N-GR was characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy (XPS), and electrochemical methods. The electrochemical behavior of L-cysteine at Fe(2)O(3)NPs/N-GR was investigated by voltammetry. The Fe(2)O(3)NPs/N-GR showed a very efficient electrocatalytic activity for the oxidation of L-cysteine in 0.1 M phosphate buffer solution (PBS, pH 7.0). The oxidation peak currents increased dramatically at Fe(2)O(3)NPs/N-GR-modified electrode. The potential utility of the sensor was demonstrated by applying it to the analytical determination of L-cysteine. Experimental results showed that the electrocatalytic current increased linearly with L-cysteine concentration in the range of 0.2-400 mu M with a lowest detectable concentration of 0.1 mu M.

引用

页码：3613 / 3620

页数：8

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