A new polyoxometalate/rGO/Pani composite modified electrode for electrochemical sensing of nitrite and its application to food and environmental samples

被引：51

作者：

Suma, B. P. ^{[1
]}

Adarakatti, Prashanth Shivappa ^{[1
]}

Kempahanumakkagari, Suresh Kumar ^{[2
]}

Malingappa, Pandurangappa ^{[1
]}

机构：

[1] Bangalore Univ, Dept Chem, Cent Coll Campus, Bengaluru, India

[2] Dayananda Sagar Univ, Sch Basic & Appl Sci, Kumaraswamy Layout, Bengaluru, India

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2019年 / 229卷

关键词：

Arsenomolybdate-Pani-rGO composite; Glassy carbon electrode; Square wave voltammetry; Electrode material; Nitrite oxidation; REDUCED GRAPHENE OXIDE; CHEMICALLY-MODIFIED ELECTRODES; HYBRID MATERIALS; OXIDATION; ELECTROCATALYSIS; FABRICATION; ADSORPTION; REDUCTION; SURFACES; NITRATE;

D O I：

10.1016/j.matchemphys.2019.02.087

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The reduced graphene oxide - polyaniline - Arsenomolybdate (rGO-Pani-AsM) composite modified glassy carbon electrode (GCE) interface has been demonstrated as a sensitive electrochemical interface for nitrite sensing. The synthesized composite has been characterized by spectroscopic and electrochemical techniques such as X-ray diffraction (XRD), Fourier transform Infra-red spectroscopy (FTIR), Raman spectroscopy, scanning electron microscopy (SEM), cyclic voltammetry (CV) and square wave voltammetry (SWV). The rGO-Pani-AsM composite exhibited higher oxidative current and reduced over potentials in the electrochemical oxidation of nitrite than bare glassy carbon electrode. The proposed sensor exhibited linearity in the concentration range 25-7500 mu M with a limit of detection (LOD) of 10.71 mu M and sensitivity of 0.803 mu A mu M-1 cm(-2). The analytical utility of the proposed sensor has been examined by applying it to real sample analysis such as packed beverages, cucumber extract and water samples.

引用

页码：269 / 278

页数：10

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