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Prussian blue nanometer particle produced by reverse micelle method for electrochemical analysis

A nanoparticle and Prussian blue technology, which is applied in the field of nanoparticle preparation, can solve the problems of poor stability of Prussian blue and achieve good reversibility and stability

Inactive Publication Date: 2009-02-18
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the shortcoming of poor stability of Prussian blue, provide a new method for preparing Prussian blue, obtain Prussian blue nanoparticles with small particle size and uniform dispersion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Preparation of Prussian blue nanoparticles: Prepare 0.5M dioctyl sodium sulfosuccinate in 2ml of isooctane, add 0.09ml of water to control the final water / surfactant ratio to 12.22, stir until clear; KCl and 0.1M HCl aqueous solution 0.05ml, after a period of continuous stirring, add 0.04ml 0.1M FeCl dropwise 3 solution; after the solution is clarified, add 0.04ml of 0.1MK dropwise 4 Fe(CN) 6 Stir overnight; wash with ethanol and water repeatedly by centrifugation to remove impurities, and finally disperse with water to obtain a colloidal solution of Prussian blue nanoparticles.

Embodiment 2

[0020] Preparation of Prussian Blue Nanoparticles Modified Disc Gold Electrode and Its Application to H in Solution 2 o 2 Electrochemical detection: the disc gold electrode was immersed in 2mM cysteine ​​aqueous solution to make it fully assembled, rinsed with water and dried; the colloidal solution of Prussian blue nanoparticles prepared by the reverse micellar method was added dropwise to the electrode surface, Rinse with water after drying.

[0021] The gold electrode modified by Prussian blue nanoparticles, the saturated calomel reference electrode and the platinum wire counter electrode were placed in the phosphate buffer solution with pH 6, and the modified electrode pair was measured by cyclic voltammetry or potentiostatic method on the electrochemical workstation. h 2 o 2 electrochemical response. Potential scanning range: -0.2~0.6V, scanning rate: 0.1V / s.

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Abstract

The invention relates to the preparation and application of nano-materials, in particular to a Prussian blue nano-particle preparation method through reverse micelle. The invention aims to overcome the disadvantages of poor stability of Prussian blue and easy reunion of nano-particles. The Prussian blue nano-particles prepared through reverse micelle are small in particle size and are dispersed evenly. The nano-particles are decorated on an electrode to detect H2O2 so as to realize the electrochemical analysis and application of the nano-particles; and the nano-particles are characterized by high sensitivity, good stability, low detection limit and wide H2O2 analysis and detection linear range. Enzyme can be fixed on the surface of the electrode modified by the nano-particles to prepare an enzyme biosensor so as to realize detection and analysis of the corresponding enzyme substrates and reduce the cost of enzyme biosensors.

Description

1. Technical field [0001] The invention relates to a method for preparing nanoparticles and applications thereof, in particular to preparing Prussian blue nanoparticles by a reverse micelle method and modifying electrodes for electrochemical analysis, which belongs to the field of nanomaterial preparation. 2. Background technology [0002] Since the emergence of nanotechnology in the 1980s, its basic theoretical research and application research such as new material development have developed rapidly. The development and research of new nanomaterials has been included in the development strategy of science and technology by many countries and regions. Become one of the main driving forces for technological innovation in the future world. Subtle changes in the particle size of nanomaterials produce surface effects, quantum size effects, and macroscopic quantum tunneling effects. Its unique properties include: large specific surface area and surface activity, good light absor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/30
Inventor 陈建荣邱静霞缪煜清刘继伟
Owner ZHEJIANG NORMAL UNIVERSITY
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