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Method for rapidly preparing anodic titanium oxide nanotube array film

A technology of anodized titanium and nanotube arrays, applied in the field of electrochemistry, can solve the problems of uncontrolled electronic current, uneven electric field distribution, electrical breakdown at the interface between titanium sheet and electrolyte, etc., and achieve the effect of convenient control and rapid preparation

Active Publication Date: 2020-12-29
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when anodized under high electric field conditions, the electronic current is easily out of control, and the electrical breakdown of the oxide film occurs.
In addition, when the titanium oxide film is prepared by the traditional electrochemical anodic oxidation method, the titanium sheet is directly connected to the positive electrode of the power supply as the anode. Due to the uneven distribution of the electric field on the titanium sheet, electrical breakdown will also occur at the interface between the titanium sheet and the electrolyte. phenomenon, anodizing cannot continue

Method used

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  • Method for rapidly preparing anodic titanium oxide nanotube array film
  • Method for rapidly preparing anodic titanium oxide nanotube array film
  • Method for rapidly preparing anodic titanium oxide nanotube array film

Examples

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Embodiment 1

[0020]Firstly, a titanium foil strip with a purity of 99.5%, a thickness of 200 μm, and a thickness of 12 cm×1 cm is immersed in a polishing solution composed of hydrofluoric acid, nitric acid and water with a volume ratio of 1:1:2 for 20-30 s to remove the titanium surface的oxide film. Then rinse with deionized water. Fold the polished titanium sheet into an inverted "U" shape, and insert both ends of the titanium sheet into two independent electrolytic cells. Insert a graphite plate as an electrode in the two electrolytic cells, respectively, the two graphite plates are parallel to the two ends of the inverted "U"-shaped titanium sheet, and the distance is equal, both are 0.5 cm. Two graphite plates are connected with the power cord. The electrolytic cell where the graphite plate connected to the negative electrode of the power supply is located is recorded as the anode electrolytic cell. A glycol solution containing 0.3 wt% ammonium fluoride and 2 vol% water is used as the electro...

Embodiment 2

[0022]Except that the electrolyte in the cathodic electrolytic cell is a 1 M sulfuric acid solution, the other steps are the same as in Example 1.

Embodiment 3

[0024]Except that the electrolyte in the cathodic electrolytic cell is 1 M sodium hydroxide solution, the other steps are the same as in Example 1.

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Abstract

The invention discloses a method for quickly preparing an anodic titanium oxide nanotube array film. The method comprises the following steps of folding a polished titanium sheet into a U shape; inserting a first end of the titanium sheet into a first electrolytic tank; inserting a second end of the titanium sheet into a second electrolytic tank; arranging a first graphite plate electrode in the first electrolytic tank; arranging a second graphite plate electrode in the second electrolytic tank, wherein the two graphite plate electrodes are parallel to the first end and the second end of the titanium sheet and keep the same distance from the first end and the second end of the titanium sheet; and carrying out electrification for constant-voltage anodic oxidation treatment. According to theinvention, under the condition of closed bipolar electrochemical anodic oxidation, the titanium sheet generates a regular titanium oxide nanotube array film in a fluorine-containing electrolyte rapidly, uniformly and stably, and the growth rate of nanotubes can reach over 2.0 [mu] / min. According to the method, the growth speed of the oxide film can be controlled by changing the ammonium fluorideconcentrations of the electrolytes in the two electrolytic tanks and the area of the titanium sheet in the cathode electrolytic tank, and the oxide film growing under high current density is not easyto break down.

Description

Technical field[0001]The invention belongs to the technical field of electrochemistry, and relates to a preparation method of an anodized titanium oxide nanotube array film, in particular to a preparation method of an anodized titanium oxide nanotube array film with rapid growth and complete structure.Background technique[0002]Titanium oxide has become a research hotspot in many fields such as photocatalysis, sensors, lithium ion batteries, and biomedical equipment based on its advantages of environmental protection, non-toxicity, easy availability of raw materials, and good chemical stability. In particular, the titanium oxide nanotube array film grown vertically in situ on the titanium metal substrate by anodizing has the advantages of oriented arrangement, high specific surface area, and unique electron transmission path, and has become the mainstay of many devices including supercapacitors. Ideal electrode material.[0003]At present, the rate of preparing titanium oxide nanotube ...

Claims

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Application Information

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IPC IPC(8): C25D11/26
CPCC25D11/26
Inventor 周沁怡张健鹏但雨欣王安成朱绪飞宋晔
Owner NANJING UNIV OF SCI & TECH
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