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Porous silver loaded on copper-based carrier in situ as well as preparation method and application of porous silver

A porous silver and copper-based technology, applied in the field of metal materials, can solve the problems of easy aggregation of silver nano-basic units, loss of catalyst performance, long-term synthesis process, etc., and achieve excellent SERS performance, uniform distribution, and excellent catalytic performance.

Active Publication Date: 2022-03-22
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation process of this method is relatively complicated and requires a long synthesis process, and the prepared silver nano-basic units are easy to aggregate, thereby reducing its catalytic performance to a certain extent.
[0004] In the application process of porous silver, it is often necessary to load porous silver on the carrier twice to realize its catalytic performance; however, the loading process is complicated and easily causes the performance loss of the catalyst; therefore, it is urgent to develop an in-situ A synthetic method that supports porous silver and is simple to operate and easy to implement, reduces catalyst loss and improves the application performance of porous silver

Method used

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  • Porous silver loaded on copper-based carrier in situ as well as preparation method and application of porous silver
  • Porous silver loaded on copper-based carrier in situ as well as preparation method and application of porous silver
  • Porous silver loaded on copper-based carrier in situ as well as preparation method and application of porous silver

Examples

Experimental program
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Effect test

Embodiment 1

[0050] A preparation method of porous silver supported in situ on a copper-based carrier, the preparation method is as follows:

[0051] 1) Soak the copper foil with a 50% fluoroboric acid aqueous solution at room temperature for 10 minutes to remove oxides on its surface, then wash with water and dry to obtain a pretreated copper-based carrier.

[0052] 2) Prepare 100mL of silver nitrate (20mmol / L) and 2-chlorobenzoic acid (10mmol / L) mixed solution.

[0053] 3) At 20° C., immerse 20 mg of the pretreated copper foil in 2 mL of the mixed solution for 5 minutes to react.

[0054] 4) Rinse the obtained porous silver-loaded copper foil with ethanol and deionized water in sequence, and dry to obtain the in-situ-loaded porous silver on the copper-based carrier.

[0055] The SEM image of the porous silver supported in situ on the copper-based carrier prepared in this example is as follows Figure 1-4 As shown, the porous structure exists in the form of three-dimensional openings, a...

Embodiment 2

[0057] A method for preparing porous silver supported in situ on a copper-based carrier is as described in Example 1, except that copper foil is used instead of copper foil.

[0058] The SEM morphology of the porous silver supported in situ on the copper-based carrier obtained in this example is as follows Figure 5 It can be seen from the figure that when the copper-based material is replaced by copper foam, a curled porous silver nanosheet structure with uniform distribution and high porosity can still be grown on its surface.

Embodiment 3

[0060] A method for preparing porous silver supported in situ on a copper-based carrier, as described in Example 1, except that a copper mesh is used instead of copper foil.

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Abstract

The invention provides in-situ loaded porous silver on a copper-based carrier as well as a preparation method and application of the in-situ loaded porous silver. The preparation method of the porous silver loaded on the copper-based carrier in situ comprises the following steps: dissolving silver nitrate and chlorobenzoic acid in water to prepare a mixed solution; and immersing the pretreated copper-based carrier into the mixed solution, reacting, washing and drying to obtain the porous silver loaded on the copper-based carrier in situ. According to the method, the porous silver can be rapidly and efficiently prepared, complex operation steps and reaction equipment are not needed, and large-scale production can be achieved. According to the method, the porous silver can be loaded on the copper-based carriers of different structures in situ, and the loss of the porous silver is reduced; and the porous silver loaded on the copper-based carrier in situ has excellent catalytic performance and SERS (Surface Enhanced Raman Scattering) performance.

Description

technical field [0001] The invention relates to porous silver supported in situ on a copper-based carrier, a preparation method and application thereof, and belongs to the technical field of metal materials. Background technique [0002] Porous silver has excellent physical and chemical properties, such as large specific surface area, low density, high porosity, excellent electrical and thermal conductivity, and is not easily oxidized. It has been widely used in catalysis, sensing, surface-enhanced Raman scattering, biological medical and other fields. At present, the commonly used preparation methods of porous silver mainly include template method, dealloying and physical sputtering method, but there are certain problems in the above methods, such as cumbersome steps and complex equipment, which make it difficult to realize large-scale production of porous silver. [0003] Chinese patent document CN104525937A discloses a porous silver micro-nano structure and a preparation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J35/10B01J37/00C07C213/02C07C215/76G01N21/65
CPCB01J23/8926B01J37/0018C07C213/02G01N21/65B01J35/60C07C215/76
Inventor 占金华张韶缨来永超王彤杨青
Owner SHANDONG UNIV
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