Synthesis, Characterization and Electrochemical Sensing Property of Fe-Fe2O3 Nanocomposite

2012 ◽  
Vol 584 ◽  
pp. 263-266 ◽  
Author(s):  
R. Manigandan ◽  
R. Suresh ◽  
K. Giribabu ◽  
L. Vijayalakshmi ◽  
A. Stephen ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Glassy Carbon ◽  
Electrochemical Behaviour ◽  
Electrochemical Sensing ◽  
Carbon Electrode ◽  
Narrow Size Distribution ◽  
Modified Glassy Carbon Electrode ◽  
One Pot ◽  
Sem Image ◽  
Xrd Studies

Fe-Fe2O3 nanocomposite was synthesized by one pot method using ferric chloride as the iron source, sodium borohydride as the reducing agent and PVA as the stabilizer. The synthesized Fe-Fe2O3 nanocomposite was characterized by using XRD and SEM. The XRD studies reveal the formation of Fe-Fe2O3 nanocomposite and the broadening of the peak reveals the narrow size distribution of the Fe-Fe2O3 nanocomposite. The SEM image of Fe nanocomposite shows the agglomerated microspheres. The synthesized Fe-Fe2O3 composite nanoparticles were evaluated for electrochemical sensing of hydrogen peroxide. The electrochemical behaviour of Fe-Fe2O3 nanocomposite modified glassy carbon electrode (GCE) exhibit excellent electrocatalytic activity when compared with bare GCE.

Facile synthesis of Co3O4-NiNPs composite for electrochemical non-enzymatic sensing platform of small chemical molecules

2021 ◽  
Author(s):  
Miaomiao Zou ◽  
Li Feng ◽  
Xiaoyun Lin ◽  
Yongnian Ni
Keyword(s):  
Hydrogen Peroxide ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode ◽  
Facile Synthesis ◽  
Nano Composite ◽  
Sensing Platform ◽  
Morphology And Structure ◽  
Small Chemical

In this paper, a new Co3O4-Ni nano-composite modified glassy carbon electrode (Co3O4-NiNPs/GCE) was successfully constructed and used to detect glucose and hydrogen peroxide (H2O2). The morphology and structure of Co3O4...

scholarly journals Electrochemical Determination of Trace Pb (II) by The Modified Glassy Carbon Electrode Compositing MultiWalled Carbon Nanotubes-Nafion-Bi Film

2020 ◽  
pp. 1-12
Keyword(s):  
Carbon Nanotubes ◽  
Glassy Carbon Electrode ◽  
Modified Electrode ◽  
Glassy Carbon ◽  
Anodic Stripping Voltammetry ◽  
Electrochemical Sensing ◽  
Carbon Electrode ◽  
Bismuth Film ◽  
Modified Glassy Carbon Electrode

A modified glassy carbon electrode (GCE) compositing multi-walled carbon nanotubes (MWCNTs), Nafion and bismuth film was prepared and applied for the sensitive detection of trace Pb (II). MWCNTs were dispersed into ethanol by ultrasonication in the presence of Nafion and the nanotubes are coated onto the bare GCE. After that, an extra Nafion adhesion agent is added to the electrode. By the in situ plating, a bismuth film was fabricated on the MWCNTs-NA/GCE, making the desired electrode, MWCNTs-NA-Bi/GCE. The modified electrode was characterized by differential pulse anodic stripping voltammetry, scanning electron microscopy, and cyclic voltammetry. A deposition potential of –1.4 V (vs. Ag/AgCl) and a deposition time of 300 s were applied to the working electrode under stirred conditions after optimizing. Nanotubes and Nafion concentrations and pH were carefully optimized to determine trace lead ions by using the electrode as an electrochemical-sensing platform. Nafion effectively increased the stability and adhesivity of the composite film. The MWCNTs-NA-Bi film modified electrode can remarkably increase the anodic peak current of Pb2+. The sensitivity of MWCNTs-NA-Bi/GCE is 4.35 times higher than that of the bare GCE with bismuth film. The prepared electrode showed excellent stability and reproducibility and can be applied for determination of Pb2+ contained wastewater.

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