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Method for preparing metal particles through continuous electrochemical deposition

A technology of metal particles and electrodeposition, applied in the direction of electrolysis process, electrolysis components, nanotechnology, etc., can solve the problems of difficult industrialization prospects and high production costs, and achieve the effect of continuous preparation and uniform distribution

Active Publication Date: 2020-02-07
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can realize the continuous production of metal powder prepared by electrodeposition, the production cost is high and the industrialization prospect is difficult.

Method used

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  • Method for preparing metal particles through continuous electrochemical deposition
  • Method for preparing metal particles through continuous electrochemical deposition
  • Method for preparing metal particles through continuous electrochemical deposition

Examples

Experimental program
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Effect test

Embodiment 1

[0064] Preparation of Silver Particles by Electrodeposition in Constant Voltage Mode

[0065] (1) Preparation of electrolyte, preparation of 5g / L AgNO 3 , 25g / L Na 2 S 2 o 3 ·5H 2 O, 5g / L K 2 SO 3 and 5g / L H 3 BO 3 mixed solution;

[0066] (2) Select a cathode substrate capable of continuous movement, the substrate adopts a stainless steel strip, and the surface of the stainless steel strip is polished;

[0067] (3) Adjust the parameters of electrochemical deposition, and carry out electrodeposition in constant voltage mode. The electrochemical workstation used is CHENHUA760, and the voltage range in the process of constant voltage mode is 0.4V;

[0068] (4) The stainless steel belt of the cathode substrate passes through the electrodeposition area, the cleaning area, and the peeling area continuously and in sequence, and then directly returns to the electrodeposition area, and the cathode substrate forms a continuous and cyclic movement;

[0069] (5) In the electrodep...

Embodiment 2

[0076] Preparation of Silver Particles by Electrodeposition in Constant Current Mode

[0077] (1) Preparation of electrolyte, preparation of 5g / L AgNO 3 , 25g / L Na 2 S 2 o 3 ·5H 2 O, 5g / LK 2 SO 3 and 5g / L H 3 BO 3 mixed solution;

[0078] (2) Select a cathode substrate capable of continuous movement, the substrate adopts a stainless steel strip, and the surface of the stainless steel strip is polished;

[0079] (3) Adjust the parameters of electrochemical deposition to conduct constant current mode electrodeposition, and the current density range during the constant current mode is 1mA / cm 2 ;

[0080] (4) The cathode substrate stainless steel belt passes through the electrodeposition area, the cleaning area, and the stripping area continuously and sequentially;

[0081] (5) In the electrodeposition area, the cathode substrate stainless steel strip moves continuously in the electrolyte, the part of the cathode substrate stainless steel strip immersed in the electroly...

Embodiment 3

[0088] Preparation of Nickel Particles by Electrodeposition in Constant Voltage Mode

[0089] (1) Preparation of electrolyte, preparation of 25g / L NiSO 4 ·6H 2 O, 3.75g / L NiCl 2 ·6H 2 O, and 10g / L H 3 BO 3 mixed solution;

[0090] (2) Select a cathode substrate capable of continuous movement, the cathode substrate adopts a stainless steel strip, and the surface of the cathode substrate stainless steel strip is polished;

[0091] (3) Adjust the electrochemical deposition parameters, and perform constant voltage mode electrodeposition, and the voltage during the constant voltage mode is 1.5V;

[0092] (4) The stainless steel belt of the cathode substrate passes through the electrodeposition area, the cleaning area, and the peeling area continuously and in sequence, and then directly returns to the electrodeposition area, and the cathode substrate forms a continuous and cyclic movement;

[0093] (5) In the electrodeposition area, the cathode substrate stainless steel strip...

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Abstract

The invention discloses a method for preparing metal particles through continuous electrochemical deposition. The method comprises the main steps: firstly, by controlling electrodeposition parameters,evenly-dispersed metal particles are electrodeposited on a movable substrate; then the movable substrate carry the electrodeposited metal particles, and the substrate and materials on the substrate are cleaned or subjected to surface treatment; and finally, the particles on the surface of the substrate are stripped through methods such as physical stripping, and the particles are dispersed in a solution to be collected. The method has the advantages that the metal particles are prepared through an electrodeposition electronic reduction method, wherein the particle diameter of the metal particles is even, the metal particles are evenly dispersed, and the surfaces of the metal particles are free of active agents; and contact force between the particles and the substrate is small so that theparticles can be collected through simple physical stripping, in the whole synthesis process, the particle size is controllable, an electrolyte can be reutilized, compared with a traditional method for synthesizing the metal particles, the cost is low, and the size is controllable.

Description

technical field [0001] The invention relates to the field of synthesis of metal particles, specifically, the invention relates to metal particles with low contact force and a method for preparing the corresponding metal particles by adjusting the particle size through continuous electrochemical deposition. Background technique [0002] Metal particle materials are an important part of metal materials. In recent years, with the discovery of various novel properties of metal particles, the field of metal particles has achieved vigorous development and has become a key basic material for the preparation of various new functional materials. The development of preparation methods for metal particles is the basis for the development of metal science. Traditionally, there are two main ways to prepare metal particles: one is chemical method, including liquid phase reduction method, high temperature pyrolysis method and so on. The liquid-phase reduction method includes hydrothermal,...

Claims

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Application Information

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IPC IPC(8): C25C5/02C25C7/08B82Y40/00
CPCB82Y40/00C25C5/02C25C7/08
Inventor 伍晖黄雅杨程
Owner TSINGHUA UNIV
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