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Method for preparing nano materials by direct electrodeposit in ionic liquid microemulsion

A technology of ionic liquid and microemulsion, which is applied in the field of direct electrodeposition to prepare nanomaterials in ionic liquid microemulsion, which can solve the problems of poor conductivity, difficult electrochemical research, and few electrochemical methods.

Inactive Publication Date: 2009-10-14
HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the electrical conductivity of the general inverse microemulsion system is extremely poor, it is difficult to be used in electrochemical research. At present, chemical methods are mainly used to prepare nanoparticles by using microemulsions, and electrochemical methods are rarely used.

Method used

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  • Method for preparing nano materials by direct electrodeposit in ionic liquid microemulsion
  • Method for preparing nano materials by direct electrodeposit in ionic liquid microemulsion
  • Method for preparing nano materials by direct electrodeposit in ionic liquid microemulsion

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Effect test

Embodiment 1

[0025] The 0.05 mol / L silver nitrate aqueous solution, the surfactant polyethylene glycol octyl phenyl ether and the 1-butyl-3-methylimidazole hexafluorophosphate ionic liquid were adjusted to 10%, 45%, and 45% volume respectively Ratio mixing, and then ultrasonic for 10min to make the mixing uniform. The glassy carbon electrode with a diameter of 3mm was polished smoothly on the ultrafine alumina powder, washed with water, and then placed in a diluted nitric acid aqueous solution, anhydrous ethanol and double distilled water, respectively, and sonicated for 5 minutes, and dried for use. Then connect the glassy carbon as the working electrode to the negative electrode of the power supply, and the large-area platinum plate as the counter electrode to the positive electrode of the power supply, put it into the pre-prepared ionic liquid microemulsion containing silver nitrate, and control the current density to 5mA / cm 2 , After 5 minutes of deposition, the desired coating can be obta...

Embodiment 2

[0027] The 0.01 mol / L chloroauric acid aqueous solution, the surfactant polyethylene glycol octyl phenyl ether and the 1-butyl-3-methylimidazole hexafluorophosphate ionic liquid were adjusted to 10%, 55%, and 35% respectively The volume ratio is mixed, and then sonicated for 10 minutes to make it uniform. At the same time, the surface area is 0.5cm 2 The stainless steel electrode is polished on the ultrafine alumina powder to a mirror surface, washed with water, and then placed in a diluted nitric acid aqueous solution, anhydrous ethanol and double distilled water, respectively, and ultrasonicated for 5 minutes, and dried for use. Then use stainless steel as the working electrode, large-area platinum sheet as the counter electrode, and anhydrous Ag / AgCl as the reference electrode, put it into the pre-prepared ionic liquid microemulsion containing chloroauric acid, control the electrode potential to 0.2V, and deposit After 30 minutes, the desired coating can be obtained on the stai...

Embodiment 3

[0029] Mix 0.1 mol / L chloroauric acid aqueous solution, surfactant polyethylene glycol octyl phenyl ether and 1-butyl-3-methylimidazole hexafluorophosphate ionic liquid in a certain volume ratio to prepare three Part of the microemulsion with different molar ratios of water and surfactant, the molar ratios of which are 5.25, 7.7, and 9.0 respectively, and then sonicated for 10 minutes to make it uniform. At the same time, the surface area is 0.5cm 2 The nickel electrode is polished brightly on metallographic sandpaper, washed with water and placed in absolute ethanol and double-distilled water for 5 minutes each, and dried for use. Then connect the nickel electrode as the working electrode to the negative electrode of the power supply, and the large-area platinum sheet as the counter electrode to connect the positive electrode of the power supply, and put it into three pre-prepared ionic liquid microemulsions containing chloroauric acid with different molar ratios of water and sur...

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Abstract

The invention relates to a method for preparing nano materials by direct electrodeposit in ionic liquid microemulsion, a new technology for preparing nano materials, which combines an electrochemical method and a microemulsion method. Under the effect of surface active agent polyoxyethylene octyl phenyl ether, 1-butyl-3-methylimidazole hexaflourophosphate salt ionic liquid and aqueous solution form water drum ionic liquid microemulsion with relatively high electroconductibility; an electroconductive electrode and the water drum ionic liquid microemulsion form an electrode system. A nano metal plating featuring controllable size and even distribution is prepared in a 'nano pool' in ionic liquid microemulsion by a current control method or an electric potential control method; wherein, size of the nano particles can be controlled by the mol ratio between water and the surface active agent; the technology for preparing novel nano materials has the advantages of low equipment cost, easy operation and easy control.

Description

Technical field: [0001] The invention relates to a new method for preparing nano materials by direct electrodeposition in an ionic liquid microemulsion. Background technique: [0002] Nanomaterials are new materials that have attracted much attention in recent years. Nano particles have unique physical and chemical properties due to their small particle size and large specific surface area. They are widely used in catalysis, electricity, optics, biosensors and other fields. There are many methods for preparing nanomaterials, and the microemulsion method is one of the most widely used methods. [0003] Microemulsion refers to a thermodynamically stable, isotropic, transparent or translucent dispersion system formed by two immiscible liquids under the action of the surfactant molecular interface film. The droplet diameter of the dispersed phase of the microemulsion is usually 0-100nm, which is a solution system with special structure and performance. Because this kind of nano-sized...

Claims

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Application Information

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IPC IPC(8): C25D3/02
Inventor 侯朝辉旷亚非付超鹏何斌鸿
Owner HUNAN INSTITUTE OF SCIENCE AND TECHNOLOGY
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