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A kind of in-situ electrochemical preparation method of silver nano film

An in-situ electrochemical and nano-film technology, which is applied in the field of in-situ electrochemical preparation of nano-films, can solve problems such as high cost, cumbersome process, and environmental pollution, and achieve the effect of not easy to fall off, simple method, and strong binding force

Inactive Publication Date: 2017-12-19
SHENYANG JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical method mainly uses different chemical reagents, the cost is high, the process is cumbersome, and it is easy to cause environmental pollution.
In addition to the high cost of physical methods, the stability of the prepared nano-silver is not enough, and the bonding strength between the formed film and the substrate is low.

Method used

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  • A kind of in-situ electrochemical preparation method of silver nano film
  • A kind of in-situ electrochemical preparation method of silver nano film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: the concrete steps of the present invention are as follows:

[0023] Step 1: Clean the silver substrate with distilled water and absolute ethanol respectively, and dry its surface with nitrogen;

[0024] Step 2: Weigh 20g of sodium hydroxide particles, slowly pour into a beaker with 600mL of distilled water, stir evenly, pour into a 1000mL volumetric flask, pour distilled water into the volumetric flask to make the liquid level reach the volumetric line of the volumetric flask, Mix to form a uniform 0.5mol / L sodium hydroxide solution electrolyte.

[0025] Step 3: Using the electrochemical three-electrode system, connect the three holes of the electrolytic cell to the silver substrate, the reference electrode and the counter electrode respectively, and the reference electrode is located between the silver substrate and the counter electrode, and the silver substrate is the working electrode. The three electrodes are respectively connected to the three corr...

Embodiment 2

[0028] Embodiment 2: the different processing steps of this example and implementation 1 are:

[0029] Step 4: Use the electrochemical three-electrode system, and use cyclic voltammetry to scan the silver substrate from the initial potential of -0.2V at 25°C, the scanning speed is 0.3mV / s, and the intermediate potential is 0.5 After V, the reverse scanning reaches the terminal potential -0.3V. After completing five complete cyclic voltammetry continuously, the polarization process is stopped, and a silver nano-film can be obtained on the silver substrate.

Embodiment 3

[0030] Embodiment 3: the different processing steps of this example and implementation 1 are:

[0031] Step 2: Weigh 20g of sodium hydroxide particles, slowly pour into a beaker with 600mL of distilled water, stir evenly, pour into a 1000mL volumetric flask, pour distilled water into the volumetric flask to make the liquid level reach the volumetric line of the volumetric flask, Mix to form a uniform 0.5mol / L sodium hydroxide solution electrolyte.

[0032] Step 4: Use the electrochemical three-electrode system, and use cyclic voltammetry to scan the silver substrate from the initial potential of -0.5V at 25°C, the scanning speed is 1mV / s, and the intermediate potential is 0.7V Finally, the reverse scanning reaches the terminal potential -0.3V, completes five complete cycles, stops the polarization process, and can obtain silver nano-films on the silver substrate.

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Abstract

The invention discloses an in-situ electrochemical preparation method for silver nanometer thin films, and belongs to the field of preparation technologies for nanometer materials. The in-situ electrochemical preparation method includes that three-electrode systems are adopted, silver matrixes in sodium hydroxide or potassium hydroxide solution are used as working electrodes, silver substrates are subjected to electrochemical polarization by the aid of set specific polarization potential ranges, accordingly, the silver nanometer thin films can directly grow on the surfaces of the silver substrates in an in-situ manner and are of granular micro-structures, and the sizes of crystal grains are smaller than 200 nm. The in-situ electrochemical preparation method has the advantages that the in-situ electrochemical preparation method includes simple steps and is low in cost and free of constraints of the shapes of the silver substrates; the silver nanometer thin films can be obtained at normal temperatures, are difficult to fall off owing to high adhesion between the thin films and substrates and can be directly used for devices such as electronic devices, button batteries, cleaning agents and chemical engineering catalysts.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, in particular to an in-situ electrochemical preparation method of a silver nanofilm. Background technique [0002] Due to its unique optical, electronic and catalytic properties, nano silver can be used in biosensors, optical devices, electronic components and catalyst materials. However, the current methods of producing nano-silver are mainly physical and chemical methods. The chemical method mainly uses different chemical reagents, the cost is high, the process is cumbersome, and it is easy to cause environmental pollution. In addition to the high cost of the physical method, the prepared nano-silver is not stable enough, and the bonding strength between the formed film and the substrate is low. Contents of the invention [0003] Aiming at the above-mentioned technical problems, the present invention provides an in-situ electrochemical preparation method of a silver nano-fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25F3/02
CPCC25F3/02
Inventor 万晔宋熠凯宋智远王欢高飞
Owner SHENYANG JIANZHU UNIVERSITY