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Method for preparing diamond particles on surface of liquid metal through electrochemical reduction

A technology of diamond particles and liquid metal, applied in the direction of electrodes, electrolytic processes, electrolytic components, etc., can solve the problems of energy consumption and huge production costs of preparation devices in harsh preparation environments, and achieve the effects of low cost, mild experimental conditions, and wide sources

Active Publication Date: 2021-11-30
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional diamond preparation methods often require harsh preparation environments, special preparation equipment and a large amount of energy consumption, which brings huge production costs

Method used

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  • Method for preparing diamond particles on surface of liquid metal through electrochemical reduction
  • Method for preparing diamond particles on surface of liquid metal through electrochemical reduction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A preparation method of nano-diamond particles, the steps are as follows:

[0017] (1) Add 60 mL of methanol solution containing saturated tetrabutylammonium hexafluorophosphate into a 300 mL electrolytic cell.

[0018] (2) The gallium melt electrode and the platinum mesh electrode were placed in the electrolytic cell, wherein the gallium melt was used as the cathode, and the platinum mesh electrode was used as the anode, and the distance between the two electrodes was 12mm, and the electrolytic cell was sealed.

[0019] (3) Introduce CO into the electrolyzer 2 , the pressure inside the electrolytic cell is 6MPa, and the temperature is 50°C.

[0020] (4) A voltage of 4.5V was applied between the gallium cathode and the platinum grid anode for 6 hours.

[0021] The finally obtained diamond nanoparticles have a particle size of about 15nm.

Embodiment 2

[0023] A preparation method of nano-diamond particles, the steps are as follows:

[0024] (1) Add 30mL methanol solution containing saturated tetrabutylammonium hexafluorophosphate into a 300mL electrolytic cell.

[0025] (2) The mercury melt electrode and the platinum mesh electrode are placed in the electrolytic cell, the distance between the two electrodes is 15mm, and the electrolytic cell is sealed, wherein the mercury melt is used as the cathode, and the platinum mesh electrode is used as the anode.

[0026] (3) Introduce CO into the electrolyzer 2 , the pressure inside the electrolytic cell is 10MPa, and the temperature is 40°C.

[0027] (4) A voltage of 6.0 V was applied for 12 hours between the mercury melt cathode and the platinum mesh anode.

[0028] Finally, the diameter of the obtained diamond nanoparticles is about 20nm.

Embodiment 3

[0030] A preparation method of nano-diamond particles, the steps are as follows:

[0031] (1) Add 50 mL of methanol solution containing saturated tetrabutylammonium hexafluorophosphate into a 300 mL electrolytic cell.

[0032] (2) Place Wood's alloy (28wt%Pt+22wt%Sn+50wt%Bi) melt and platinum mesh electrode in the electrolytic cell, the distance between the two electrodes is 15mm, and the closed electrolytic cell, wherein the Wood's alloy melt is used as the cathode, platinum A mesh electrode was used as the anode.

[0033] (3) Introduce CO into the electrolyzer 2 , the pressure inside the electrolytic cell is 9MPa, and the temperature is 140°C.

[0034] (4) A voltage of 3.5V was applied between the Wood's metal melt cathode and the platinum mesh anode for 10 hours.

[0035] The finally obtained diamond nanoparticles have a particle size of about 35nm.

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Abstract

The invention belongs to the technical field of diamond particle preparation, and particularly relates to a method for preparing diamond particles on the surface of liquid metal through electrochemical reduction. The preparation method comprises the steps that a voltage is applied between a cathode (liquid metal) and an anode, carbon dioxide gas is introduced into a closed electrolytic cell added with electrolyte, and electrochemical reduction is carried out to obtain nano diamond particles. The carbon particles obtained by deposition have diamond structures or diamond-like structures. The method is simple in equipment, convenient to operate and easy for industrial production.

Description

technical field [0001] The invention belongs to the technical field of diamond particle preparation, in particular to a method for preparing diamond particles by electrochemical reduction on the surface of liquid metal. Background technique [0002] Diamond particles have low friction coefficient, extremely high hardness, excellent wear resistance, stable chemical properties, and can be used in machinery, electronics, medical and other fields. Traditional diamond preparation methods often require harsh preparation environments, special preparation devices and a large amount of energy consumption, which brings huge production costs. Contents of the invention [0003] The object of the present invention is to address the above problems and provide a method for preparing diamond particles by electrochemical reduction on the surface of liquid metal, which can obtain diamond nanoparticles in a relatively low temperature range (room temperature to 250° C.) at relatively low volt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25B1/135C25B1/50C25B11/033B82Y40/00
CPCC25B1/135C25B1/50C25B11/033B82Y40/00
Inventor 吴敏娴王世颖张鑫鑫王历郑学同王文昌陈智栋
Owner CHANGZHOU UNIV