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Method for synthesizing polypyrrole-chitosan-metal nanoparticle composite film on surface of cathode by one-step process

A metal nanoparticle, cathode surface technology, applied in electrolytic inorganic material coating, electrolytic coating, coating and other directions, can solve the problems of high cost, long preparation period, complex preparation process, etc., and achieve low production cost, mild reaction conditions, simple craftsmanship

Inactive Publication Date: 2012-10-10
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation process of polymer / metal nanoparticle-enzyme modified electrodes in the prior art is generally complicated, the preparation cycle is long, and the cost is high

Method used

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  • Method for synthesizing polypyrrole-chitosan-metal nanoparticle composite film on surface of cathode by one-step process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) chitosan is dissolved in 0.1mol / L nitric acid solution to obtain solution A, and the mass percentage concentration of chitosan in solution A is 1%;

[0020] 2) After adding pyrrole monomer and copper sulfate to solution A, solution B is obtained, the concentration of pyrrole monomer in solution B is 0.1mol / L, and the concentration of copper sulfate in solution B is 0.2mol / L;

[0021] 3) Put the nickel strip as the cathode in solution B, electrify under the protection of nitrogen for electrochemical synthesis, the potential is -0.8V, the electrodeposition time is 10 minutes, and the polypyrrole-chitosan-metal is obtained in one step on the surface of the cathode Copper nanoparticles composite film.

[0022] The surface was observed with a scanning electrode, and the polypyrrole-chitosan-metal copper nanoparticle composite film contained uniformly distributed copper nanoparticles.

Embodiment 2

[0024] 1) with step 1 in embodiment 1;

[0025] 2) with step 2 in embodiment 1;

[0026] 3) Place indium tin oxide conductive glass as the cathode in solution B, and conduct electrochemical synthesis under the protection of nitrogen, with a potential of -1.2V and an electrodeposition time of 20 minutes, and obtain polypyrrole-chitopolymer on the surface of the cathode in one step. Sugar-metal copper nanoparticle composite films.

[0027] The surface was observed with a scanning electrode, and the polypyrrole-chitosan-metal copper nanoparticle composite film contained uniformly distributed copper nanoparticles.

Embodiment 3

[0029] 1) with step 1 in embodiment 1;

[0030] 2) After adding pyrrole monomer and copper nitrate to solution A, solution B is obtained, the concentration of pyrrole monomer in solution B is 0.2mol / L, and the concentration of copper sulfate in solution B is 0.3mol / L;

[0031] 3) Same as step 3 in Example 1.

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Abstract

The invention relates to a method for preparing a polypyrrole-chitosan-metal nanoparticle composite film, which comprises the following steps: 1) dissolving the chitosan in 0.01 to 1 mol / L nitric acid solution to obtain solution A, wherein the mass percentage concentration of the chitosan in the solution A is 0.5 to 5 percent; 2) adding a pyrrole monomer and a divalent metal salt into the solution A to obtain solution B, wherein the concentration of the pyrrole monomer in the solution B is 0.1 to 0.4mol / L and the concentration of the divalent metal salt in the solution B is 0.1 to 0.3 mol / L; and 3) placing the cathode into the solution B, energizing under protection of nitrogen, performing electrochemical synthesis to synthesize the composite film on the surface of the cathode by a one-step process. In the invention, the reaction conditions are mild, the process is simple, the cost of large-scale production is low, the thickness of the composite film and the component content in the composite film can be controlled, and the method has a bright application prospect in the field of film materials.

Description

technical field [0001] The invention relates to the synthesis of a polymer / metal nanoparticle composite film, in particular to a preparation method of a polypyrrole-chitosan-metal nanoparticle composite film. Background technique [0002] Metal nanoparticles have a large specific surface area and high reactivity, which makes them show attractive application prospects in the fields of electrocatalysis of organic substances, modified electrodes, sensors, etc. An increasingly active field of research at the intersection. The preparation of metal nanoparticles with excellent performance has extremely important theoretical significance and practical value. However, metal nanoparticles are prone to agglomeration, which limits their wide application. How to effectively prevent the aggregation of metal nanoparticles is a challenging task. [0003] The study found that the material obtained by compounding polymer materials and metal nanoparticles can better maintain the dispersion...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D15/00C25D9/08
Inventor 李兰艳李亮刘仿军郑华明高大志
Owner WUHAN INSTITUTE OF TECHNOLOGY
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