Silver nanoparticles/polymethacrylic acid (AgNPs/PMA) hybrid nanocomposites-modified electrodes for the electrochemical detection of nitrate ions

被引：22

作者：

Bonyani, M. ^{[1
]}

Mirzaei, A. ^{[1
]}

Leonardi, S. G. ^{[2
]}

Neri, G. ^{[2
]}

机构：

[1] Shiraz Univ, Dept Mat Sci & Engn, Shiraz, Iran

[2] Univ Messina, Dept Elect Engn Chem & Ind Engn, I-98166 Messina, Italy

来源：

MEASUREMENT | 2016年 / 84卷

关键词：

Nanostructures; Chemical synthesis; Electrochemical properties; ELECTROCATALYTIC REDUCTION; VOLTAMMETRIC DETERMINATION; NANOPARTICLES; NITRITE; SENSOR;

D O I：

10.1016/j.measurement.2016.02.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

AgNPs/PMA hybrid nanocomposite materials with different Ag loadings have been synthesized using a simple chemical route assisted by UV irradiation. The hybrid composites were characterized by means of SEM and TEM, UV-vis spectroscopy and XPS. The as synthesized hybrid samples, composed of small Ag nanoparticles (AgNPs) embedded within the PMA (poly-methacrylic-acid) matrix, have been used to modify the working electrode of disposable screen printed carbon electrodes (SPCEs). It has been observed that hybrid composite with the lowest Ag loading forms dendritic silver structures on the surface of working electrode, whereas at higher loadings massive structures were formed. The electrocatalytic properties of the AgNPs/PMA/SPCEs were investigated toward the reduction of nitrate at neutral pH. Based on these modified electrodes, both voltammetric and amperometric sensors were developed for the electrochemical sensing of nitrate. Voltammetric sensor showed a wide linear range (0-20 mM) and high sensitivity (130 mu A m(-1) cm(-2)). (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：83 / 90

页数：8

共 31 条

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