A sensitive enzyme-free hydrogen peroxide sensor based on a chitosan-graphene quantum dot/silver nanocube nanocomposite modified electrode

被引：30
|
作者：
Jiang, Yingying [1 ]
Li, Yuhui [1 ]
Li, Yancai [1 ,2 ]
Li, Shunxing [1 ,2 ]
机构：
[1] Minnan Normal Univ, Coll Chem & Environm, Zhangzhou 363000, Peoples R China
[2] Minnan Normal Univ, Fujian Prov Key Lab Modern Analyt Sci & Separat T, Zhangzhou 363000, Peoples R China
来源：
ANALYTICAL METHODS | 2016年 / 8卷 / 11期
基金：
中国国家自然科学基金;
关键词：
GLASSY-CARBON ELECTRODE; SILVER NANOPARTICLES; GOLD NANOPARTICLES; GREEN SYNTHESIS; H2O2; DETECTION; DOTS; REDUCTION; GLUCOSE; NANOWIRES;
D O I：
10.1039/c5ay02976g
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Graphene quantum dots (GQDs) and silver nanocubes (AgNCs) were synthesized successfully and characterized by UV-vis and fluorescence (FL) spectra, Fourier transform infrared (FT-IR) spectroscopy, transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The GQDs and AgNCs modified gold electrode (GE) possesses good conductivity shown by electrochemical impedance spectroscopy (EIS). The Chit-GQDs/AgNCs/GE displays a good electrocatalytic activity towards the reduction of hydrogen peroxide (H2O2), and can be used as a novel and sensitive enzyme-free H2O2 sensor. According to the amperometric experiments, the sensor exhibits a rapid response, a wide linear range from 10 mu M to 7.38 mM, a low detection limit of 0.15 mu M and high selectivity, as well as a good repeatability for H2O2 determination.
引用
收藏
页码：2448 / 2455
页数：8
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