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Preparation method of electrochemical sensor based on PPy (polypyrrole) coated manganese nanowire for hydrogen peroxide detection

A technology for hydrogen peroxide detection and polypyrrole, which is applied in scientific instruments, material analysis through electromagnetic means, instruments, etc., can solve the problems of limiting the application of electrochemical methods, high electrode kinetics, etc.

Inactive Publication Date: 2013-11-20
WUXI BAILING SENSING TECH
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Problems solved by technology

On the other hand, H 2 o 2 Redox reactions at many electrodes require high overpotentials and low electrode kinetics, which severely limit the application of this type of electrochemical method.

Method used

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Embodiment Construction

[0009] In order to deepen the understanding of the present invention, the present invention will be further described below in conjunction with implementation.

[0010] A method for preparing an electrochemical sensor based on polypyrrole-coated manganese nanowires for hydrogen peroxide detection, the steps are as follows:

[0011] (1) Preparation of PPy-coated manganese nanowires: 2 mL of 0.1 mol / L Mn(CH 3 COO) 2 2H 2 The O solution was added to 60 mL of 7 mol / L NaOH solution, and then stirred at a rate of 800 rpm at room temperature. After 20 min, 1 mL of pyrrole monomer was added to the solution, and the solution changed from light brown to dark brown. Polymerization of pyrrole was completed within 30 min. Then 0.02 mL of hydrazine monohydrate was added to the reaction solution, and then the temperature was raised to 50 °C at a rate of 0.5 °C / min and maintained at this temperature for 1 h. Finally, the reaction mixture turned transparent and light brown, indicating that...

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Abstract

The invention relates to preparation of an electrochemical sensor for hydrogen peroxide detection, and particularly relates to preparation of a novel electrode based on a PPy (polypyrrole) coated manganese nanowire. According to the sensor prepared by the invention, the Mn / PPy nanowire can provide a micro environment (with different oxide states of Mn and appropriate area provided by the Mn / PPy nanowire) for the electrochemical detection of H2O2 so as to lead to an intensified current reaction. The electrochemical sensor based on the Mn / PPy nanowire has the characteristics of low detection limit, high sensitivity and long-term stability on H2O2 detection.

Description

Technical field: [0001] The invention relates to the preparation of an electrochemical sensor for hydrogen peroxide detection, in particular to the preparation of a novel electrode based on polypyrrole-coated manganese nanowires. Background technique: [0002] Conductive polymers have been investigated as a novel material for metal corrosion protection. They are readily formed in aqueous solutions on a variety of different substrates. In the organic molecular structure of this type of compound, there is an extended conjugated large π-electron system along the polymer skeleton. Recent studies have shown that polypyrrole (PPy) coatings have a good anti-corrosion function. Excellent electronic conductivity and environmental stability make PPy one of the most widely used conductive polymers. In addition, the metal oxide / PPy core-shell structure has better electronic properties than pure substrate materials. Recent studies have shown that the composite material of polypyrrole...

Claims

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Application Information

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IPC IPC(8): G01N27/416
Inventor 孙京华潘正海
Owner WUXI BAILING SENSING TECH
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