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A method for preparing titanium dioxide nanotubes by two-step anodic oxidation

An anodizing, titanium dioxide technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as low bonding strength and irregular surface of nanotubes

Active Publication Date: 2018-06-15
广东湛美生物医药技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention adds two simple steps to the traditional method for preparing titanium dioxide nanotubes, solves the problems of irregular nanotube surfaces and low bonding strength, and realizes low-cost industrial production

Method used

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  • A method for preparing titanium dioxide nanotubes by two-step anodic oxidation
  • A method for preparing titanium dioxide nanotubes by two-step anodic oxidation

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Grind and polish a titanium sheet with a size of 10mm*10mm*1mm with emery paper with a particle size of 800 mesh, then use a mixed solution of acetone:ethanol=1:1 (volume ratio) to sonicate for 10 minutes, rinse with ultrapure water, and then clean the The titanium sheet was soaked in 20mL of 12M HCl solution, the temperature was raised to 110°C at a rate of 10°C / min, and the acid cooking time was 30min, and then cooled to room temperature at 10°C / min. 2 Conditions of drying to obtain a new titanium electrode.

[0029] The obtained nascent titanium electrode was placed in a two-electrode anodizing device, and a self-made ruthenium-titanium-tin electrode was used as a cathode, and 100 mL of 89.5wt.% ethylene glycol, 0.5wt.% NH 4 Electrolyte composed of F and 10wt.% ultrapure water, anodized at room temperature through direct current, and the current density is controlled at 1mA / cm 2 , the oxidation time is 5min; take out the oxidized electrode, and use 10mL of 2M HCl so...

Embodiment 2

[0032] Grind and polish a titanium sheet with a size of 10mm*10mm*1mm with emery paper with a particle size of 800 mesh, then use a mixed solution of acetone:ethanol=1:1 (volume ratio) to sonicate for 10 minutes, rinse with ultrapure water, and then clean the The titanium sheet was immersed in 20mL of 12M HCl solution, the temperature was raised to 110°C at a rate of 10°C / min, and the acid cooking time was 1h, and then lowered to room temperature. 2 Conditions of drying to obtain a new titanium electrode.

[0033] The obtained nascent titanium electrode was placed in a two-electrode anodizing device, and a self-made ruthenium-titanium-tin electrode was used as a cathode, and 100mL of 89wt.% ethylene glycol, 1wt.% NH 4 Electrolyte composed of F and 10wt.% ultrapure water, anodized at room temperature through direct current, and the current density is controlled at 1mA / cm 2 , the oxidation time is 5min; take out the oxidized electrode, and use 10mL of 2M HCl solution to sonicat...

Embodiment 3

[0036] Grind and polish a titanium sheet with a size of 10mm*10mm*1mm with emery paper with a particle size of 800 mesh, then use a mixed solution of acetone:ethanol=1:1 (volume ratio) to sonicate for 10 minutes, rinse with ultrapure water, and then clean the The titanium sheet was soaked in 20mL of 12M HCl solution, the temperature was raised to 110°C at a rate of 10°C / min, and the acid cooking time was 1min, and then lowered to room temperature. 2 Conditions of drying to obtain a new titanium electrode.

[0037] The obtained nascent titanium electrode was placed in a two-electrode anodizing device, and a self-made ruthenium-titanium-tin electrode was used as a cathode, and 100 mL of 89.5wt.% ethylene glycol, 0.5wt.% NH 4 Electrolyte composed of F and 10wt.% ultra-pure water, through direct current for anodic oxidation, the control current density is 2mA / cm 2 , the oxidation time is 5min; take out the oxidized electrode, and use 10mL of 2M HCl solution to sonicate for 10min;...

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Abstract

A method for preparing a titanium dioxide nanotube array by two-step anodic oxidation is disclosed. The method is characterized by including preparing new-made titanium by adopting an acid boiling process, and performing two times of electrolysis to obtain titanium dioxide nanotubes having uniform tube diameters and lengths and a neatly arranged array. The method includes subjecting a polished titanium sheet to ultrasonic treatment in an organic solution, acid boiling, water washing and drying treatment in order; assembling a standard two-electrode system by adopting the treated titanium sheetas an anode and adopting a ruthenium-titanium-stannum electrode as a cathode; and performing constant-current anodic oxidation and constant-potential anodic oxidation in order. The array of the titanium dioxide nanotubes which have uniform tube diameters and lengths and high bonding strength can be prepared on the surface of the titanium sheet by the method. Through the constant-current oxidationand constant-potential oxidation, a problem that nanotubes are irregular in surface and low in bonding strength is solved, and the obtained titanium dioxide nanotube array has a good application prospect in the fields of photoelectrocatalysis, energy, and the like.

Description

Technical field: [0001] The invention relates to a method for preparing titanium dioxide nanotube arrays by secondary anodic oxidation Background technique: [0002] Self-organized nanoporous materials with high aspect ratios have been widely used in various fields such as electricity, magnetism, and optics due to their unique properties. The porous titania nanotube arrays prepared by the anodic oxidation method have a neat and uniform structure, and have excellent semiconductor and photoelectrochemical properties. In addition, the anodic oxidation method also has the advantages of easy operation, low cost, and the ability to adapt to various complex metal surfaces. The morphology of titanium dioxide nanotubes prepared by this method is highly controllable and has high bonding strength with the titanium matrix. [0003] Although the preparation of titanium dioxide nanotubes by anodic oxidation has many advantages, there are still many areas to be improved in the traditional...

Claims

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Application Information

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IPC IPC(8): C25D11/26B82Y30/00B82Y40/00
Inventor 黄卫民刘琦林海波包金鹏刘芳兵
Owner 广东湛美生物医药技术有限公司
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