Ionic liquid solution for preparing nano-porous silver and using method thereof

A nanoporous silver and ionic liquid solvent technology, which is applied in the field of liquid phase preparation of nanoporous metals, can solve the problems of operators, environmental hazards, and high equipment requirements, and achieve the effects of environmental friendliness, high purity, and convenient preparation

Inactive Publication Date: 2010-12-08
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the metallurgical smelting process required for raw material preparation needs to be completed at a relatively high temperature and requires inert gas protection, the requirements for equipment are relatively high.
At the same time, in the subsequent electrochemical dissolution process, the parameters need to be continuously adjusted and optimized, and strong corrosive solutions such as nitric acid and sulfuric acid are usually used as the corrosion electrolyte, so the dealloying method is harmful to the operator and the environment during the application process. Hazardous

Method used

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  • Ionic liquid solution for preparing nano-porous silver and using method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Mix choline chloride and ethylene glycol at room temperature according to a molar ratio of 1:2, and heat up to 75° C. under magnetic stirring to obtain an ionic liquid composed of a mixture of choline chloride and ethylene glycol as a solvent. Measure 200 ml of the above-mentioned ionic liquid, and dissolve 0.287 g of AgCl in the above-mentioned ionic liquid to obtain an ionic liquid solution for preparing nanoporous silver.

[0018] The copper alloy (C194) with a thickness of 0.5mm was first degreased electrochemically, then washed with water, and dried.

[0019] Immerse the cleaned copper alloy in the nanoporous silver ionic liquid solution prepared above, react at 50°C for 10 minutes, then wash with methanol and water, and dry to obtain pores with a diameter of 20-50nm on the surface of the copper alloy composed of nanoporous silver. Its scanning electron microscope pictures are as figure 1 shown.

Embodiment 2

[0021] Mix choline chloride and urea at room temperature according to a molar ratio of 1:2, and raise the temperature to 75° C. under magnetic stirring to obtain an ionic liquid composed of a mixture of choline chloride and urea. Measure 200 ml of the above-mentioned ionic liquid, and dissolve 0.287 g of AgCl in the above-mentioned ionic liquid to obtain an ionic liquid solution for preparing nanoporous silver.

[0022] The copper alloy (C194) with a thickness of 0.5mm was first degreased electrochemically, then washed with water, and dried.

[0023] Immerse the cleaned copper alloy in the ionic liquid solution prepared above, react at 25°C for 10 minutes, then wash with methanol and water, and dry to obtain nanoporous pores with diameters of 10-40nm on the surface of the copper alloy. silver.

Embodiment 3

[0025] Choline chloride and ethylene glycol were mixed at room temperature according to a molar ratio of 1:2, and the temperature was raised to 75° C. under magnetic stirring to obtain an ionic liquid composed of a mixture of choline chloride and ethylene glycol. Measure 200 ml of the above-mentioned ionic liquid, and dissolve 0.574 g of AgCl in the above-mentioned ionic liquid to obtain an ionic liquid solution for preparing nanoporous silver.

[0026] The copper alloy (C194) with a thickness of 0.5mm was first degreased electrochemically, then washed with water, and dried.

[0027] Immerse the cleaned copper alloy in the ionic liquid solution prepared above, react at 25°C for 20 minutes, then wash with methanol and water, and dry to obtain nanoporous pores with diameters of 10-40nm on the surface of the copper alloy. Silver, then placed in 1mol / L FeCl 3 The copper alloy is dissolved and removed in the aqueous solution to obtain nanoporous silver without matrix support.

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Abstract

The invention relates to ionic liquid solution for preparing nano-porous silver. In the ionic liquid solution, choline chloride-based ionic liquid is used as a solvent, and each liter of choline chloride-based ionic liquid comprises 0.001 to 0.1mol of AgCl. A method for preparing the nano-porous silver by using the solution comprises the following steps of: cleaning the surface of copper or a copper alloy serving as a substrate, soaking the substrate into the ionic liquid solution after drying, depositing at the temperature of between 20 and 100 DEG C to obtain the nano-porous silver on the surface of the substrate, cleaning with methanol and water in turn, drying and putting the substrate with the nano-porous silver on the surface into aqueous solution of FeCl3 to remove the substrate so as to obtain the narno-porous silver unsupported by the substrate. The ionic liquid solution has simple components and is convenient to prepare. The method for preparing the nano-porous silver by using the solution has the advantages of simple and controllable process, no need of strong corrosive acid and environmental friendliness by using the ionic liquid as an electrolyte solvent. The prepared nano-porous silver has the advantages of high purity and contribution to mass production.

Description

technical field [0001] The invention relates to a liquid-phase preparation method of nanoporous metal, especially an ionic liquid solution for preparing nanoporous silver and a use method thereof. Background technique [0002] Nanoporous metal is a new type of nanostructure material that has been widely concerned in recent years. Its structure is characterized by a considerable number of uniformly dispersed and connected nanoscale pores on the surface and inside of the material. This material has a very high specific surface area. , showing broad application prospects in catalytic and optical properties [Ding Y, Chen MW. Nanoporous metals for catalytic and optical applications. MRS Bulletin 2009; 34: 569]. Dealloying is a long-established experimental technique for preparing porous metals, which is usually applied to aluminum-based alloy materials to prepare porous Raney metals. Raney metals have been successfully used in industrial production as metal catalysts. However, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 谷长栋涂江平
Owner ZHEJIANG UNIV
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