A method for preparing metal particles by continuous electrochemical deposition

A technology of metal particles and electrodeposition, applied in the direction of electrolytic components, electrolytic process, nanotechnology, etc., can solve the problems of high production cost and difficult industrialization prospect

Active Publication Date: 2020-10-27
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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  • A method for preparing metal particles by continuous electrochemical deposition
  • A method for preparing metal particles by continuous electrochemical deposition
  • A method for preparing metal particles by continuous electrochemical deposition

Examples

Experimental program
Comparison scheme
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 / L K 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 electrol...

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

A method for preparing metal particles by continuous electrochemical deposition. The main steps of the method include: firstly, electrodepositing uniformly dispersed metal particles on a movable substrate by controlling the electrodeposition parameters; and then carrying the electrodeposited metal particles on the movable substrate. The substrate and the above materials are cleaned or surface treated; finally, the particles on the surface of the substrate are peeled off by physical stripping and other methods, and the particles are dispersed in the solution for collection. The advantages of the present invention are that metal particles with uniform particle size, uniform dispersion and no surface active agent are prepared by means of electrodeposition electron reduction, and the contact force between the particles and the substrate is small, and the particles can be collected by simple physical peeling. The size of the diameter is controllable, and the electrolyte can be reused. Compared with the traditional method of synthesizing 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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Patent Type & Authority Patents(China)
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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