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A kind of preparation method of porous silver film

A technology of porous silver and thin films, applied in chemical instruments and methods, silver compounds, silver compounds, etc., can solve problems such as holes and uneven Ag film, and achieve the effect of increasing active sites

Active Publication Date: 2019-10-25
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Li Luman and others prepared Ag / Cu alloys by vacuum thermal evaporation, then annealed and etched away Cu, and finally obtained Ag films, but the existing problem is that the Ag films have uneven holes.

Method used

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  • A kind of preparation method of porous silver film
  • A kind of preparation method of porous silver film
  • A kind of preparation method of porous silver film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1. Preparation of inverse microemulsion

[0023] Mix 0.6g polyoxyethylene castor oil and 0.4g Span-80 evenly, then add 2.0mL ethanol, mix evenly, add the obtained mixture to 100mL cyclohexane, and add 1.5mL1mol / L silver nitrate aqueous solution to form a white transparent inverse microemulsion.

[0024] 2. Preparation of porous silver film

[0025] Add 1.5mL of 1mol / L sodium hydroxide aqueous solution dropwise to the inverse microemulsion obtained in step 1. After 10 minutes, the reaction is complete, then add 1.5mL of 1mol / L silver nitrate aqueous solution dropwise, and stir for 10 minutes to form a stable inverse phase Microemulsion system, repeat this operation 4 times; then add 1.5mL 1mol / L sodium hydroxide aqueous solution dropwise, the reaction is complete after 10 minutes, centrifuge and wash to obtain silver oxide precipitate; disperse the silver oxide precipitate evenly with ethanol, the concentration is 0.05g / L mL, coated on a glass sheet (the thickness of ...

Embodiment 2

[0028] In the present embodiment, burn at 250 ℃ for 3 hours, other steps are identical with embodiment 1, make porous silver film (see Figure 4 ).

Embodiment 3

[0030] 1. Preparation of inverse microemulsion

[0031] Mix 0.6g polyoxyethylene castor oil and 0.4g Span-80 evenly, then add 2.0mL ethanol, mix evenly, add the obtained mixture to 100mL cyclohexane, and add 1.5mL0. 5mol / L silver nitrate aqueous solution to form a white transparent inverse microemulsion.

[0032] 2. Preparation of porous silver film

[0033] Add 1.5 mL of 0.5 mol / L aqueous sodium hydroxide solution dropwise to the inverse microemulsion obtained in step 1, after 10 minutes the reaction is complete, then add 1.5 mL of 0.5 mol / L silver nitrate aqueous solution dropwise, and stir for 10 minutes to form a stable Inverted microemulsion system, repeat this operation 4 times; then add 1.5mL 0.5mol / L sodium hydroxide aqueous solution dropwise, the reaction is complete after 10 minutes, centrifuge and wash to obtain silver oxide precipitate; disperse the silver oxide precipitate evenly with ethanol, the concentration is at 0.05g / mL, coated on a glass sheet (the thickn...

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Abstract

The invention discloses a preparation method of a porous silver film. Silver nitrate and sodium hydroxide serve as raw materials, uniform silver oxide particles are prepared in a reversed-phase microemulsion system by adjusting and controlling the molar concentration ratio, then a glass sheet is coated with the silver oxide particles, a thin layer is formed, reduction is carried out in the environment of the temperature of 200-250 DEG C, and the uniform porous silver film is prepared. The porous silver film can serve as silver electrode and porous silver base carriers, and has certain application value in the aspects of preparation of porous silver electrodes and composite silver alloy electrodes and the fields such as precious metal catalysis, bacterium resistance and sensors.

Description

technical field [0001] The invention belongs to the technical field of inorganic material preparation, and in particular relates to a method for preparing silver oxide by using an inverse microemulsion method, and reducing the silver oxide film at high temperature to prepare a porous silver thin film. Background technique [0002] The inverse microemulsion system has the advantages of good stability, high solid content, fast reaction speed, simple post-treatment process, and can be used directly. According to literature reports, there are many synthesis methods of nano-silver, such as radiation method, laser ablation method, electrochemical method, photochemical method, biosynthesis method and microemulsion method. The method improves the application of silver in the fields of biochemical sensing, biomedicine, catalysis, and electrical conduction by controlling its morphology. The research group of Professor Gao Xiaoyong of Zhengzhou University prepared Ag by DC magnetron s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C20/04C01G5/00
CPCC01G5/00C23C20/04
Inventor 金普军孙存冲陈煜康永强张瑜瑾
Owner SHAANXI NORMAL UNIV