An electrochemical sensor for sensitive determination of nitrites based on Ag-Fe3O4-graphene oxide magnetic nanocomposites

被引：24

作者：

Li, Bo-Qiang ^{[1
]}

Nie, Fei ^{[1
]}

Sheng, Qing-Lin ^{[1
]}

Zheng, Jian-Bin ^{[1
]}

机构：

[1] NW Univ Xian, Inst Analyt Sci, Shaanxi Prov Key Lab Electroanalyt Chem, Xian 710069, Shaanxi, Peoples R China

来源：

CHEMICAL PAPERS | 2015年 / 69卷 / 07期

关键词：

electrochemical sensor; graphene oxide; magnetic nanocomposites; nitrite; GLASSY-CARBON ELECTRODE; GRAPHENE OXIDE; ELECTROCATALYTIC REDUCTION; NANOPARTICLES; PLATFORM; NITRATE; PHASE; WATER;

D O I：

10.1515/chempap-2015-0099

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A functional Ag-Fe3O4-grapheme oxide magnetic nanocomposite was synthesized and used to prepare a nitrite sensor. Morphology and composition of the nanocomposites were characterized by a transmission electron microscope, UV-VIS spectroscopy, X-ray diffraction, and Fourier transform infrared spectra. Electrochemical investigation indicated that the nanocomposites possess excellent electrochemical oxidation ability towards nitrites. The sensor exhibited two linear ranges: one from 0.5 mu M to 0.72 mM with a correlation coefficient of 0.996 and sensitivity of 1996 mu A mM(-1) cm(-2); the other from 0.72 mM to 8.15 mM with a correlation coefficient of 0.998 and sensitivity of 426 mu A mM(-1) cm(-2). The limit of detection of this sensing system was 0.17 mu M at the signal-to-noise ratio of 3. Additionally, the sensor exhibited long-term stability, good reproducibility, and anti-interference. (C) 2015 Institute of Chemistry, Slovak Academy of Sciences

引用

页码：911 / 920

页数：10

共 45 条

[1] Micell-mediated extraction for the spectrophotometric determination of nitrite in water and biological samples based on its reaction with p-nitroaniline in the presence of diphenylamine [J].