Preparation method of titanium dioxide core/shell nanometer cable array

A technology of titanium dioxide and nano-cables, applied in chemical instruments and methods, electrolytic coatings, surface reaction electrolytic coatings, etc., can solve the problems of difficult removal of titanium sheet substrates, easy cracking, and restricted use, and achieve product morphology. control effect

Inactive Publication Date: 2013-03-06
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the anodized titanium dioxide nanotube array film is very brittle, easy to break, the supporting titanium sheet substrate is difficult to remove, and the low end of the titanium dioxide nanotubes is difficult to pass through, which restricts the use of titanium dioxide as a template.

Method used

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  • Preparation method of titanium dioxide core/shell nanometer cable array
  • Preparation method of titanium dioxide core/shell nanometer cable array
  • Preparation method of titanium dioxide core/shell nanometer cable array

Examples

Experimental program
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Effect test

Embodiment 1

[0020] (1) First, ultrasonically clean the metal sheet with a titanium content of 96% in a mixed solution of ethanol and acetone with a concentration ratio of 1:1 for 60 minutes to remove organic matter on the surface, then repeatedly clean it with deionized water, and dry it in the air ;

[0021] (2) Anodize the cleaned and dried metal sheet in an ethylene glycol solution containing 0.30mol / L hydrofluoric acid, where the oxidation voltage is 15v, and the oxidation time is 15min; then increase the anodic oxidation voltage to 50v, and oxidize 2h, forming the upper and lower layers of titanium dioxide nanotube arrays with different sizes and diameters;

[0022] (3) Take out the anodized metal sheet, and separate the small-diameter titanium dioxide nanotubes prepared by anodizing at a small voltage from the large-diameter titanium dioxide nanotube array by ultrasonic oscillation, leaving titanium dioxide nanotubes with a flat surface and no cracks. tube array film;

[0023] (4)...

Embodiment 2

[0026] (1) First, ultrasonically clean the metal sheet with a titanium content of 96% in a mixed solution of ethanol and acetone with a concentration ratio of 1:1 for 60 minutes to remove organic matter on the surface, then repeatedly clean it with deionized water, and dry it in the air ;

[0027] (2) Anodize the cleaned and dried metal sheet in an ethylene glycol solution containing 0.30mol / L hydrofluoric acid, where the oxidation voltage is 15v, and the oxidation time is 15min; then increase the anodic oxidation voltage to 50v, and oxidize 2h, forming the upper and lower layers of titanium dioxide nanotube arrays with different sizes and diameters;

[0028] (3) Take out the anodized metal sheet, and separate the small-diameter titanium dioxide nanotubes prepared by anodizing at a small voltage from the large-diameter titanium dioxide nanotube array by ultrasonic oscillation, leaving titanium dioxide nanotubes with a flat surface and no cracks. tube array film;

[0029] (4)...

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Abstract

The invention discloses a preparation method of a titanium dioxide core / shell nanometer cable array. The method comprises: firstly, preparing a layer of TiO2 nanotube array film with small tube diameter on a titanium chip under a low oxidation voltage; and then, increasing the anode oxidation voltage, and obtaining a titanium dioxide nanotube array with large tube diameter below the titanium dioxide nanotube array with small tube diameter; performing ultrasonic oscillating; soaking the titanium dioxide nanotube array with a titanium chip substrate in a high-concentration alkaline solution, and cleaning the titanium dioxide nanotube array through deionized water; and soaking the titanium dioxide array in an acid solution for a period, taking out the titanium dioxide array, cleaning the titanium dioxide array with deionized water, and drying the titanium dioxide array to obtain the titanium dioxide core / shell nanometer cable array. The method is simple, feasible, quick and effective, the shape and outline of the product are controllable, and the method has practical value.

Description

technical field [0001] The present invention mainly relates to a universal chemical etching method, in particular to a method for preparing a titanium dioxide core / shell nano-cable array Background technique [0002] In some electrolytes (mainly organic or inorganic electrolytes containing fluorine ions), pure titanium sheets can be anodized to obtain ordered arrays of titanium dioxide nanotubes. These titanium dioxide nanotube arrays prepared by anodic oxidation have broad application prospects in the fields of environment, energy, biology and optics due to their unique tubular structure, high specific surface area and orderly arrangement. In recent years, people have used anodized titanium dioxide nanotube arrays as templates (similar to porous anodized alumina templates), and used electrochemical deposition technology to fill titanium dioxide nanotubes with nanowires such as metals and semiconductors to obtain metal / titanium dioxide and semiconductor nanowires. / tit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/26C30B30/02C30B29/12C30B29/66
Inventor 胡小晔孟国文刘毛许伟韩方明王兆明
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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