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A preparation method for preparing multi-morphology nano-silver-tin alloy by cyclic square wave method

A nano-silver-tin, multi-morphology technology, applied in nanotechnology and other directions, can solve the problems of complex process, expensive equipment, long production cycle, etc., and achieve the effect of simple process, simple equipment and easy operation.

Active Publication Date: 2019-07-02
NANJING TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the methods for preparing nano-metal materials with various shapes can be divided into physical methods and chemical methods. These methods generally have problems such as complex processes, expensive equipment, large environmental pollution, and long production cycles.

Method used

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  • A preparation method for preparing multi-morphology nano-silver-tin alloy by cyclic square wave method
  • A preparation method for preparing multi-morphology nano-silver-tin alloy by cyclic square wave method
  • A preparation method for preparing multi-morphology nano-silver-tin alloy by cyclic square wave method

Examples

Experimental program
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Effect test

Embodiment 1

[0032] The silver-tin alloy was used as the working electrode, the platinum sheet was used as the counter electrode, and the cyclic square wave electrodeposition was carried out in 1.2mol / L HCl and 0.1mol / L PVP aqueous solution. The potential of the working electrode was maintained at -0.4V within 2400s, and then the working electrode was taken out, rinsed and dried to obtain a nanoporous silver-tin alloy.

[0033] Depend on figure 1 It can be seen that the nanoporous silver-tin alloy prepared according to this method has a three-dimensional continuous multi-channel nanoporous structure with a pore size of 150-200 nm and a high specific surface area.

Embodiment 2

[0035] The silver-tin alloy was used as the working electrode, the platinum sheet was used as the counter electrode, and the cyclic square wave electrodeposition was carried out in 1.2mol / L HCl and 0.15mol / L PVP aqueous solution. Set the potential of the working electrode to jump from -1.0V to -0.4V and then back to -1.0V as a cycle, and the working time ratio of the three potentials is 1:1:2. Apply 25 potential cycles within 2400s, then take out the working electrode, wash and dry, and obtain the nano-silver-tin alloy with dendritic structure.

[0036] Depend on figure 2 It can be seen that the nano-silver-tin alloy of dendritic structure prepared according to this method has a symmetrical dendritic nanostructure, and a single dendritic nanostructure has a central trunk (major axis) and multiple branches (short axis), each branch Perpendicular to the central trunk and parallel to each other, the average length of the trunk is 20um, and the branch is 3um.

Embodiment 3

[0038] The silver-tin alloy was used as the working electrode, the platinum sheet was used as the counter electrode, and cyclic square wave electrodeposition was carried out in 1.5mol / L HCl and 0.05mol / L PVP aqueous solution. Set the potential of the working electrode to jump from -1.0V to -0.4V and then back to -1.0V as a cycle, and the working time ratio of the three potentials is 1:1:2. Apply 120 potential cycles within 2400s, then take out the working electrode, rinse and dry to obtain nano-silver-tin alloy particles.

[0039] Depend on image 3 It can be seen that the nano-silver-tin alloy particles prepared according to this method are smaller in size and uniform in size, with an average particle size of 540nm and good dispersibility.

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Abstract

The invention discloses a method for preparing a multi-morphology nanometer silver-tin alloy through a cyclic square wave method. The method for preparing the multi-morphology nanometer silver-tin alloy through the cyclic square wave method comprises the steps that a silver-tin alloy is used a work electrode, a platinum sheet is used as a counter electrode, and cyclic square wave electro-deposition is conducted in a HCl water solution and a PVP water solution; one circulation period is set to be that the potential of the work electrode is jumped to -0.4V from -1.0 V and then jumped back to -1.0V, no circulation period is exerted, so that the work electrode is kept at the -0.4V, or after multiple circulation periods is exerted, flushing and drying are conducted; and then the multi-morphology nanometer silver-tin alloy is obtained. The method for preparing the multi-morphology nanometer silver-tin alloy through the cyclic square wave method is simple in technology and environmentally friendly, and adopted equipment is simple.

Description

technical field [0001] The application relates to a method for preparing multi-morphology nano-silver-tin alloys by using a circular square wave method, and belongs to the technical field of nano-metal functional materials. Background technique [0002] Metal nanomaterials refer to metal materials with at least one dimension in the three-dimensional space at the nanoscale or composed of them as basic units. [0003] Metal nanomaterials have many unique physical and chemical properties that are not found in ordinary materials. They have unique and broad application prospects in electricity, optics, mechanics, magnetism, catalysts, sensing and biomedicine, and are widely used in national defense. , electronics, chemical industry, aerospace and biomedicine and many other fields. Among them, nanoporous metal materials have large porosity, high specific surface area and significant surface effect; dendritic structure nano metal materials have relatively high specific activity an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C5/02B82Y40/00
CPCB82Y40/00C25C5/02
Inventor 淡振华杨玉林陆嘉飞渠佳慧付超群徐丽君常辉
Owner NANJING TECH UNIV