A method for preparing micro-nano silver dendrites by liquid-phase electrodeposition

A micro-nano silver and electrodeposition technology, applied in the field of material chemistry, can solve the problems of complex equipment, complicated separation and purification process, and difficult shape control, and achieve the effect of stable electrolyte, simple and efficient shape control

Active Publication Date: 2018-03-30
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the prior art, the object of the present invention is to provide a method for preparing micro-nano silver dendrites by liquid-phase electrodeposition with a simple process. The method of the present invention is safe, environmentally friendly, controllable, and can effectively solve the problems in the prior art. Problems such as complex equipment, difficult shape control, complicated separation and purification process, etc.

Method used

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  • A method for preparing micro-nano silver dendrites by liquid-phase electrodeposition
  • A method for preparing micro-nano silver dendrites by liquid-phase electrodeposition
  • A method for preparing micro-nano silver dendrites by liquid-phase electrodeposition

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Embodiment 1

[0025] A method for preparing micronano silver dendrites by liquid phase electrodeposition, specifically comprising the steps of:

[0026] (1) The substrate was ultrasonically cleaned with acetone and ethanol in sequence, and rinsed with deionized water and dried. Then immersed in liquid polishing, the volume ratio of phosphoric acid and water is 7:3, constant voltage 2.2V ~ 2.4V polishing treatment for 5min, after taking out, rinse with deionized water, and dry with inert gas.

[0027] (2) With the pretreated copper foil as the cathode, the silver sheet electrode as the anode, and the deionized aqueous solution containing 0.2wt% to 0.5wt% of silver salt and NMP (N-methylpyrrolidone) as the electrolyte, using The electrolysis is carried out in the way of constant voltage electrolysis, and the temperature range is controlled from 30°C to 60°C. Micro-nano silver dendrites can be obtained on the surface of the substrate in a short period of time.

[0028] Described n-methylpyrro...

Embodiment 2

[0035] (1) The copper foil is ultrasonically cleaned with acetone and ethanol in sequence, and rinsed with deionized water and dried. Then immersed in liquid polishing, the volume ratio of phosphoric acid and water is 7:3, constant voltage 2.2V ~ 2.4V polishing treatment for 5min, after taking out, rinse with deionized water, and dry with inert gas.

[0036] (2) With the pretreated copper foil as the cathode, the silver sheet electrode as the anode, and the deionized aqueous solution containing 0.2wt% to 0.5wt% of silver salt and NMP (N-methylpyrrolidone) as the electrolyte, The electrolysis is carried out in the way of constant voltage electrolysis, the temperature range is controlled at 30-60°C, and the nano-silver wire film can be obtained on the surface of the substrate in a short period of time.

[0037] The volume ratio concentration of the n-methylpyrrolidone (NMP) is 10%;

[0038] Described silver salt is silver nitrate, mass concentration 0.4%;

[0039] The voltage ...

Embodiment 3

[0044] (1) The copper foil is ultrasonically cleaned with acetone and ethanol in sequence, and rinsed with deionized water and dried. Then immersed in liquid polishing, the volume ratio of phosphoric acid and water is 7:3, constant voltage 2.2V ~ 2.4V polishing treatment for 5min, after taking out, rinse with deionized water, and dry with inert gas.

[0045] (2) With the pretreated copper foil as the cathode, the silver sheet electrode as the anode, and the deionized aqueous solution containing 0.2wt% to 0.5wt% of silver salt and NMP (N-methylpyrrolidone) as the electrolyte, The electrolysis is carried out in the way of constant voltage electrolysis, the temperature range is controlled at 30-60°C, and the nano-silver wire film can be obtained on the surface of the substrate within a certain period of time.

[0046] The molecular protective agent is n-methylpyrrolidone (NMP) with a concentration of 10% by volume;

[0047] Described silver salt is silver nitrate, mass concentra...

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Abstract

The invention belongs to the technical field of material chemistry, and particularly relates to a method for manufacturing a micro-nano-silver dendritic crystal through liquid-phase electrodeposition. According to the method, a pre-treated substrate is taken as a cathode; a silver plate electrode is taken as an anode; a deionization aqueous solution containing silver salt and N-methyl pyrrolidone is taken as an electrolyte; a constant-voltage electrolysis mode is adopted, and electrolysis is performed at a voltage of 2-50 V and at a temperature of 30 DEG C-60 DEG C, so that the micro-nano-silver dendritic crystal can be obtained on the surface of the substrate; in the electrolyte, the volume ratio concentration of the N-methyl pyrrolidone is 10 vol%-50 vol%; and the silver dendritic crystal manufactured with the method is 60-300 nm in diameter and 10-80 mu m in length. The shape and appearance of the nano-silver dendritic crystal manufactured with the method is easy to control; and operation is simple.

Description

technical field [0001] The invention belongs to the field of material chemistry and relates to the preparation technology of micro-nano precious metals, in particular to a method for preparing micro-nano silver dendrites by liquid-phase electrodeposition. Background technique [0002] Because nano-metal materials have important applications in microelectronics, optoelectronics, catalysis, information storage, medicine, energy, magnetic devices, etc. In recent decades, it has attracted the attention of more and more researchers. The intrinsic properties of nanometallic structures can be tuned by controlling their size, appearance, composition, crystal form, and structure. The shape-controlled synthesis of nano-ions is an important part of the development of nanotechnology, and it is the basis for exploring the properties and applications of nano-structures. Therefore, the shape control of nanoparticles has recently become the focus of people's preparation research. At prese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25C5/02B22F1/00
CPCB22F1/0007C25C5/02
Inventor 张全生张立恒张道明任桢霍孟飞周敦凡
Owner SHANGHAI INST OF TECH
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