Method for preparing micro-nano-porous silver based on eutectic flux in-situ alloy deposition/alloy removing method

A technology of in-situ deposition and dealloying, which is applied in the direction of nanotechnology, can solve problems such as equipment corrosion, complicated process, and high energy consumption, and achieve the effects of mild reaction conditions, simple process, and low energy consumption for reaction

Inactive Publication Date: 2017-04-26
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, using eutectic ionic liquid as a flux medium, micro-nano porous metal materials can be prepared by electrodeposition alloy-in-situ dealloying, so as to so...

Method used

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  • Method for preparing micro-nano-porous silver based on eutectic flux in-situ alloy deposition/alloy removing method
  • Method for preparing micro-nano-porous silver based on eutectic flux in-situ alloy deposition/alloy removing method
  • Method for preparing micro-nano-porous silver based on eutectic flux in-situ alloy deposition/alloy removing method

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Embodiment 1

[0024] The method for preparing micro-nano porous silver based on in-situ deposition alloying / dealloying method of eutectic flux, its specific steps are as follows:

[0025] (1) In an open system, mix the quaternary ammonium salt after vacuum drying at 80°C with the hydrogen bond donor at a molar ratio of 1:2, and then react for 1 hour at a constant temperature of 80°C to prepare the eutectic Ionic liquid; adding a metal-inducing salt to the eutectic ionic liquid and mixing uniformly to obtain a eutectic ionic liquid-metal salt composite electrolyte; wherein the quaternary ammonium salt is choline chloride, and the hydrogen bond donor is ethylene glycol; The metal inducing salt is zinc chloride, and its concentration is 0.10 mol / L eutectic ionic liquid;

[0026] (2) With the silver sheet (2.0cm×1.5cm×0.1cm) as the cathode and the graphite sheet as the anode, in the ionic liquid-metal salt composite electrolyte obtained in step (1) at a temperature of 100°C and an electrode spa...

Embodiment 2

[0030] The method for preparing micro-nano porous silver based on in-situ deposition alloying / dealloying method of eutectic flux, its specific steps are as follows:

[0031] (1) In an open system, mix the quaternary ammonium salt after vacuum drying at 80°C with the hydrogen bond donor at a molar ratio of 1:2, and then react for 1 hour at a constant temperature of 80°C to prepare the eutectic Ionic liquid; adding a metal-inducing salt to the eutectic ionic liquid and mixing uniformly to obtain a eutectic ionic liquid-metal salt composite electrolyte; wherein the quaternary ammonium salt is choline chloride, and the hydrogen bond donor is ethylene glycol; The metal inducing salt is zinc chloride, and its concentration is 0.10 mol / L eutectic ionic liquid;

[0032] (2) With the silver sheet (2.0cm×1.5cm×0.1cm) as the cathode and the graphite sheet as the anode, in the ionic liquid-metal salt composite electrolyte obtained in step (1) at a temperature of 100°C and an electrode spa...

Embodiment 3

[0036] The method for preparing micro-nano porous silver based on in-situ deposition alloying / dealloying method of eutectic flux, its specific steps are as follows:

[0037] (1) In an open system, mix the quaternary ammonium salt after vacuum drying at 80°C with the hydrogen bond donor at a molar ratio of 1:2, and then react for 1 hour at a constant temperature of 80°C to prepare the eutectic Ionic liquid; adding a metal-inducing salt to the eutectic ionic liquid and mixing uniformly to obtain a eutectic ionic liquid-metal salt composite electrolyte; wherein the quaternary ammonium salt is choline chloride, and the hydrogen bond donor is ethylene glycol; The metal inducing salt is zinc chloride, and its concentration is 0.10 mol / L eutectic ionic liquid;

[0038] (2) With the silver sheet (2.0cm×1.5cm×0.1cm) as the cathode and the graphite sheet as the anode, in the ionic liquid-metal salt composite electrolyte obtained in step (1) at a temperature of 100°C and an electrode spa...

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Abstract

The invention relates to a method for preparing micro-nano-porous silver based on an eutectic flux in-situ alloy deposition/alloy removing method, and belongs to the technical field of preparation of nanometer materials. Under an open system, quaternary ammonium salt dried in vacuum at 80 DEG C is mixed with a hydrogen bond donor for reaction by 0.5-1 h to prepare eutectic ion liquid; metal induction salt is added in the eutectic ion liquid for uniform mixing to obtain eutectic ion liquid-metal salt compound electrolyte; a silver sheet serves as a cathode, and an inert anode serves as an anode to perform constant-current deposition in the obtained ion liquid-metal salt compound electrolyte to obtain an Ag base binary alloy plating layer on the surface of the cathode silver sheet; under an original electrolyte system, a three-electrode system is built to perform constant-potential dealloying; and the dealloyed cathode sheet is flushed by anhydrous ethanol and distilled water, and is dried to obtain the silver sheet with a micro-nano-porous structure. The method has such advantages as mild reaction conditions, controllability, low cost, no pollution and simple process.

Description

technical field [0001] The invention relates to a method for preparing micro-nano porous silver based on an in-situ deposition alloy / dealloying method of a deep eutectic flux, and belongs to the technical field of nano-material preparation. Background technique [0002] For a long time, micro-nano porous metals have the characteristics of large specific surface area, good permeability, high strength, good electrical conductivity and strong catalytic activity due to their unique bicontinuous nanoporous structure, making them ideal for sensing, catalysis, drug delivery and surface Enhanced Raman scattering has a wide range of applications. [0003] Micro-nanoporous silver has potential applications in catalysis, surface-enhanced Raman scattering (SERS), biodiagnostic detection, antibacterial properties, etc., and its relatively low price compared to other noble metals makes it the most promising large-scale application at present. One of the precious metal materials. In rece...

Claims

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Application Information

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IPC IPC(8): C25C5/02B82Y40/00
CPCC25C5/02B82Y40/00
Inventor 张启波杨闯高明远华一新徐存英李坚李艳
Owner KUNMING UNIV OF SCI & TECH
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