Silver-copper nano alloy and electrosynthesis method thereof

A nano-alloy, silver-copper technology, which is applied in the field of silver-copper nano-alloy and its capillary force-induced electrochemical synthesis, which can solve the problems of application limitations, inability to meet large-scale industrial applications, and complicated preparation process

Inactive Publication Date: 2012-01-18
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to overcome the shortcomings existing in the prior art or its application is limited, or the ratio of Ag and Cu cannot be directly adjusted, or the preparation process is

Method used

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  • Silver-copper nano alloy and electrosynthesis method thereof
  • Silver-copper nano alloy and electrosynthesis method thereof
  • Silver-copper nano alloy and electrosynthesis method thereof

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Experimental program
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Effect test

Embodiment 1

[0031] The silver-copper nano-alloy prepared in this embodiment includes Ag and Cu, and its molar composition is 0.5Ag-0.5Cu. The phase of silver-copper nano-alloy is FCC structure silver single-phase solid solution, the (111) diffraction peak of the alloy is consistent with the (111) diffraction peak of pure metal Ag, and the alloy has a surface plasmon resonance peak. The shape of the silver-copper nano-alloy is a dendrite, the distance between the secondary dendrites is 100nm, and the length of the tertiary dendrites is 100-200nm.

[0032] The electrode used in the preparation of the silver-copper nano-alloy in this embodiment uses the ITO glass plate 1 as the cathode and the silver plate 3 as the anode, and the dimensions of the ITO glass plate in all directions are consistent with the size of the silver electrode. When assembling, place the ITO glass plate 1 and the silver plate 3 horizontally, and make the conductive surface of the ITO glass plate 1 face down, and make t...

Embodiment 2

[0042] The silver-copper nano-alloy prepared in this embodiment includes Ag and Cu, and its molar composition is 0.8Ag-0.2Cu. The phase of silver-copper nano-alloy is silver single-phase solid solution with FCC structure, the (111) diffraction peak of the alloy is consistent with that of pure metal Ag, and the alloy has a surface plasmon resonance peak. The shape of the silver-copper nano-alloy is a dendrite, the distance between the secondary dendrites is 200nm, and the length of the third dendrites is 100-300nm.

[0043] The electrodes used in the preparation of silver-copper nano-alloys in this embodiment use the ITO glass plate 1 as the cathode and the silver plate 3 as the anode, and the dimensions in all directions of the ITO glass plate are consistent with the size of the silver electrode. When assembling, place the ITO glass plate 1 and the silver plate 3 horizontally, and make the conductive surface of the ITO glass plate 1 face down, and make the ITO conductive surfa...

Embodiment 3

[0053] The silver-copper nano-alloy prepared in this embodiment includes Ag and Cu, and its molar composition is 0.9Ag-0.1Cu. The phase of silver-copper nano-alloy is silver single-phase solid solution with FCC structure, the (111) diffraction peak of the alloy is consistent with that of pure metal Ag, and the alloy has a surface plasmon resonance peak. The shape of the silver-copper nano-alloy is a dendrite, the distance between the secondary dendrites is 200-300nm, and the length of the third dendrites is 300-500m.

[0054] The electrodes used in the preparation of silver-copper nano-alloys in this embodiment use the ITO glass plate 1 as the cathode and the silver plate 3 as the anode, and the dimensions in all directions of the ITO glass plate are consistent with the size of the silver electrode. When assembling, place the ITO glass plate 1 and the silver plate 3 horizontally, and make the conductive surface of the ITO glass plate 1 face down, and make the ITO conductive su...

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Abstract

The invention discloses a silver-copper nano alloy and an electrosynthesis method thereof. The silver-copper nano alloy comprises Ag and Cu; the molar components of Ag and Cu are shown as a formula of xAg-(1-x)Cu, wherein x=0.5-0.9; the phase of the alloy is a face-centered cubic structure silver single phase solid solution; the (111) diffraction peak of the alloy is consistent with the (111) diffraction peak of pure metal Ag; and the alloy has a surface plasma resonance peak and has a dendritic shape, the secondary dendrite arm spacing is 100 to 300nm, and the tertiary dendrite arm length is 100 to 500nm. The silver-copper nano alloy with the dendritic structure is grown under constant potential. Electrolyte for preparation does not contain any surfactant molecules. The surface plasma resonance frequency of the alloy is modulated by controlling components of the alloy, and along with the increase of the silver content in the silver-copper alloy, the plasma absorption peak of the alloy generates red shift. The formed silver-copper nano dendrite has a rough and clean surface and a large specific surface area, and is better applied to the aspects such as surface enhanced spectrums, surface plasma optical catalysis, surface plasma enhanced solar absorption and the like.

Description

technical field [0001] The invention belongs to the field of metal functional materials, in particular to a silver-copper nano-alloy without surfactant and a capillary force-induced electrochemical synthesis method thereof. Background technique [0002] Silver-copper nanoalloys have surface plasmon resonance (surface plasmon resonance, SPR) activity, while keeping the size of nanoparticles constant, the surface plasmon resonance wavelength can be modulated by composition. At present, there are three main methods for the preparation of silver-copper nano-alloys: [0003] The first is the electrochemical synthesis reaction with the help of various surfactant molecules, such as in patent 200910022693.3, adding polyethylene glycol-10000 to the electrolyte, using a three-electrode electrolytic cell, and using a constant potential method on an ITO glass plate However, there is a layer of organic molecules on the surface of the silver-copper nano-alloy prepared by this method. ...

Claims

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Application Information

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IPC IPC(8): C22C5/08C25C5/02
Inventor 陈福义郑春凤
Owner NORTHWESTERN POLYTECHNICAL UNIV
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