A novel nonenzymatic hydrogen peroxide sensor based on LaNi0.5Ti0.5O3/CoFe2O4 modified electrode

被引：46
作者：
Ye, Daixin [1 ]
Xu, Yanhong [2 ]
Luo, Liqiang [1 ]
Ding, Yaping [1 ,2 ]
Wang, Yulong [1 ]
Liu, Xiaojuan [1 ]
Xing, Lijun
Peng, Jinwei
机构：
[1] Shanghai Univ, Dept Chem, Shanghai 200444, Peoples R China
[2] Shanghai Univ, Sch Mat Sci & Engn, Shanghai Key Lab Modern Met & Mat Proc, Shanghai 200444, Peoples R China
来源：
COLLOIDS AND SURFACES B-BIOINTERFACES | 2012年 / 89卷
基金：
中国国家自然科学基金;
关键词：
LaNi0.5Ti0.5O3/CoFe2O4; Perovskite-type nanoparticles; Hydrogen peroxide; Electrocatalysis; Nonenzymatic; MULTIWALLED CARBON NANOTUBES; AU NANOPARTICLES; H2O2; FILM; ELECTROCATALYSIS; DECOMPOSITION; DEPOSITION; NANOWIRES; BIOSENSOR; OXIDES;
D O I：
10.1016/j.colsurfb.2011.08.014
中图分类号：
Q6 [生物物理学];
学科分类号：
071011 ;
摘要：
A novel nonenzymatic hydrogen peroxide (H2O2) sensor based on LaNi0.5Ti0.5O3/CoFe2O4 nanoparticles modified glassy carbon electrode (LNT-CFO/GCE) was proposed. Perovskite-type nanocomposite oxide LaNi0.5Ti0.5O3/CoFe2O4 was synthesized by sol-gel method and characterized by X-ray diffraction and transmission electron microscopy. The electrochemical properties of the modified electrode were studied by cyclic voltammetry and amperometry, which showed an excellent electrocatalytic activity for the oxidation of H2O2. Under the optimum conditions, the linear response was obtained in the range of 0.1 mu M to 8.2 mM, with the correlation coefficient of 0.997. The sensitivity of the modified electrode was calculated to be 3.21 mu A mu M-1 cm(-2) and the detection limit was 23 nM (based on the S/N = 3). (C) 2011 Elsevier B.V. All rights reserved.
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页码：10 / 14
页数：5
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