Method for rapidly preparing Ag/PPy composite material

A composite material, fast technology, applied in the field of preparation of Ag/PPy composite material, can solve problems such as slow kinetic speed

Inactive Publication Date: 2008-12-24
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when preparing silver / polypyrrole composites, it was found that although the reaction between silver ions and pyrrole monomers was thermodynamically feasible, the kinetics of the reaction was very slow [Matthew C.Henry, Chen-Chan Hsueh , Brian P.Timko, Michael S.Freund, Reaction of pyrroleand chlorauric acid,: a new route to composite colloids, J.Electrochem.Soc.148(11)(2001)D155-D161.], for example, in the absence of light Under conditions, it takes 48 hours to form a silver / polypyrrole film in 0.5M silver nitrate+0.5M pyrrole aqueous solution [M.A.Breimer, G.Yevgeny, S.Sy, O.A.Sadik, Incorporation of metal nanoparticles in photopolymerized organic conducting polymers: A mechanistic insight, Nano Lett. 1 (2001) 305-308.]
Although ultraviolet light irradiation can shorten the time required for this process to a certain extent, it still takes several hours, and there are few reports on other methods that can effectively improve the kinetics of this reaction.

Method used

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  • Method for rapidly preparing Ag/PPy composite material
  • Method for rapidly preparing Ag/PPy composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0017] As in the above steps, a mixed solution of 0.5M silver nitrate + 0.7M pyrrole was selected, wherein DMF was used as a solvent. Add 30 μl of 15 M ammonia solution ([NH 4 + ] / [Ag + ]=0.9), and oscillated rapidly. It can be observed that within a few minutes, the solution becomes turbid and forms a black suspension, and a black film begins to form on the container wall; after 0.5 h, a solid black Ag / PPy composite film is formed on the container wall. The infrared spectrum and XRD of the black powder obtained in the container are respectively as follows figure 1 with figure 2 shown.

Embodiment 2

[0019] As in the above steps, a mixed solution of 0.5M silver nitrate + 0.70M pyrrole was selected, wherein DMF was used as a solvent. Add 60 μl of 15 M ammonia solution ([NH 4 + / [Ag + ]=1.8), and oscillated rapidly. It can be observed that within a few minutes, the solution becomes turbid and forms a black suspension, and a black film begins to form on the container wall; after 0.5 h, a solid black Ag / PPy composite film is formed on the container wall.

Embodiment 3

[0021] A mixed solution of 2.0M silver nitrate + 1.44M pyrrole was selected, wherein DMF was used as a solvent. Add 30 μl of 15 M ammonia solution ([NH 4 + / [Ag + ]=0.23), and oscillated rapidly. Then put it under dark conditions, and observe regularly to observe the change of the color of the solution. It can be observed that within a few minutes, the solution becomes turbid and forms a black suspension, and a black film begins to form on the container wall; after 0.5 h, a solid black Ag / PPy composite film is formed on the container wall, about 4 hours After that, a blue Ag / PPy composite sol was formed in the container.

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Abstract

The invention discloses a method for quickly preparing a silver / polypyrrole composite material. Utilization of the redox reaction between silver salt and pyrrole monomer is a simple and effective method for preparing the silver / polypyrrole composite material, but the defect of low speed of the dynamic reaction is existed in the reaction; the invention provides a method in which hartshorn is added in the reaction system, which effectively speeds up the reaction speed: a stable Ag / Ppy composite film can be formed within 0.5h, and the blue Ag / Ppy composite sol can be formed within 4h.

Description

technical field [0001] The invention relates to a method for preparing an Ag / PPy composite material, in particular to a method for improving the kinetic reaction speed between silver ions and pyrrole monomers by using chemical methods. Background technique [0002] Noble metal / conducting polymer materials are an important branch of metal / polymer composite materials, which have important applications in biology, storage, electronics, and catalysis. Utilizing the redox reaction between noble metals and monomers is a simple and effective method to prepare noble metal / conductive polymer composites. At present, using this method has prepared gold / polypyrrole, gold / polyaniline, silver / Composite materials such as polypyrrole and silver / polyaniline. However, when preparing silver / polypyrrole composites, it was found that although the reaction between silver ions and pyrrole monomers was thermodynamically feasible, the kinetics of the reaction was very slow [Matthew C.Henry, Chen-C...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/04C08K3/08C08G73/06
Inventor 赵崇军李兵万传云
Owner EAST CHINA UNIV OF SCI & TECH
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