Non-enzymatic hydrogen peroxide electrochemical sensor based on a three-dimensional MnO2 nanosheets/carbon foam composite

被引:89
作者
He, Shuijian [1 ,2 ]
Zhang, Boya [1 ]
Liu, Minmin [1 ,2 ]
Chen, Wei [1 ]
机构
[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Jilin, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100039, Peoples R China
基金
中国国家自然科学基金;
关键词
GLASSY-CARBON ELECTRODE; MANGANESE OXIDE; AMPEROMETRIC SENSOR; MESOPOROUS CARBON; COPPER-OXIDE; GRAPHENE; H2O2; NANOPARTICLES; NANOTUBES; BIOSENSOR;
D O I
10.1039/c4ra09007a
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A new type of three-dimensional electrochemical sensor platform, MnO2 nanosheets/carbon foam (MnO2/CF) hybrid nanostructure, was successfully fabricated for the nonenzymatic detection of H2O2. The morphology, structure and composition of the 3D nanostructures were systematically characterized by electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. Uniform and thin MnO2 nanosheets can be formed on the carbon foam after a simple chemical process by immersing the carbon foam in a KMnO4 aqueous solution. The content of MnO2 in the MnO2/CF composites was found to play a great role in its sensing performance for H2O2 detection. The MnO2/CF2 sample with a 24.5% MnO2 content showed the best performance among the studied MnO2/CF composites. The 3D hierarchical porous structure with thin MnO2 nanosheets can provide an enhanced electrochemically active surface area, high electrical conductivity and improved analyte diffusion, which makes it a promising electrochemical sensing platform. The electrochemical studies showed that the H2O2 sensor based on the MnO2/CF2 exhibited an excellent detection performance with a wide linear range from 2.5 x 10(-6) to 2.055 x 10(-3) M and a detection limit of 1.2 x 10(-7) M (S/N = 3). These results demonstrate that such 3D nanocomposites have promising application in electrochemical sensors.
引用
收藏
页码:49315 / 49323
页数:9
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