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Preparation method and application of transparent titanium dioxide nanotube film

A technology of titanium dioxide and nanotubes, which is applied in the field of nanometers, can solve the problems of long release time, reduced film thickness, high energy consumption, etc., and achieves the effects of simple preparation method, slow dissolution rate and good film stability

Inactive Publication Date: 2012-07-18
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Reference [5] (Sergiu P.Albu; Andrei Ghicov; Jan M.Macak; Robert Hahn; Patrik Schmuki.Nano Lett.2007, 7, 1286-1289), Schmuki et al. removed the titanium substrate by selective etching, and then used HF vapor etches the bottom of the nanotubes to open the bottom, but the pore size of the nanotubes cannot be controlled
In reference [6] (Jia Lin; Jingfei Chen; Xianfeng Chen Nanoscale Research Lett.2011, 6, 475-479), normal-pressure anodic oxidation stripping cannot guarantee the opening rate of the film and the stripping time is too long, resulting in high energy consumption ; Reference [7] (Shiqi LI; Gengmin ZHANG Journal of the Ceramic Society of Japan 2010, 118, 291-294), high-voltage anodic oxidation stripping accelerates the dissolution of nanotubes, reducing the thickness of the film, and the titanium dioxide film itself is fragile The nature of its integrity can not be guaranteed, which also limits the application of the film

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  • Preparation method and application of transparent titanium dioxide nanotube film
  • Preparation method and application of transparent titanium dioxide nanotube film
  • Preparation method and application of transparent titanium dioxide nanotube film

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preparation example Construction

[0019] The invention provides a method for preparing a transparent titanium dioxide nanotube film and its application in a light-responsive artificial ion channel. The preparation method includes the following steps:

[0020] The first step, an anodizing:

[0021] The cleaned and dried titanium sheet is anodized in an organic fluorine-containing electrolyte solution A to obtain a titanium dioxide nanotube array. The component of described organic fluorine-containing electrolytic solution A is 0.25g NH 4 F, 2ml H 2 O and 100ml ethylene glycol. The anodic oxidation uses the platinum sheet as the cathode and the titanium sheet as the anode, and the anodic oxidation condition is in a constant temperature water bath at 20-30°C, with a voltage of 40-60V, for 1 hour. The cleaning refers to cleaning with acetone, absolute ethanol and deionized water successively and blowing dry.

[0022] The second step, secondary anodizing:

[0023] The titanium sheet after primary anodic oxidat...

Embodiment 1

[0030] Embodiment one: The preparation of the titanium dioxide self-supporting film transparent at both ends, the specific steps are as follows:

[0031]The first step, primary anodic oxidation: clean and dry the titanium sheet with acetone, absolute ethanol and deionized water in sequence, use the platinum sheet as the cathode, and the titanium sheet as the anode, with a voltage of 40V, in the organic fluorine-containing electrolyte A, In a constant temperature water bath at 20-30°C, a titanium dioxide nanotube film is grown through anodic oxidation. The organic fluorine-containing electrolyte A component is 0.25g NH 4 F, 2mlH 2 O and 100ml ethylene glycol.

[0032] The second step, secondary anodic oxidation: ultrasonically clean the titanium sheet that has been anodized once in 1M HCl solution and deionized water for 5-10 minutes respectively, and after drying, continue to put the titanium sheet into the organic fluorine-containing electrolyte A. Anodize in a constant ...

Embodiment 2

[0035] Embodiment two: Preparation of self-supporting films of titanium dioxide through both ends;

[0036] The other steps implemented in this embodiment are the same as in Embodiment 1, the difference is that the primary anodizing voltage is 60V, and a low-temperature annealing step is also included between the second step and the third step, specifically: titanium sheet anodizing After 5 hours, wash with isopropanol, blow dry, and then anneal at 200°C for 3 hours, and then carry out the third step of high-pressure anodic oxidation stripping. Depend on Figure 2a It can be seen that the surface of the film is very smooth, the nozzle is not corroded, and the thickness of the film reaches 24 μm; Figure 2b is a photograph of the obtained self-supporting film, and it can be seen that the film is quite intact.

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Abstract

The invention discloses a preparation method and application of a transparent titanium dioxide nanotube film. Firstly, a titanium sheet is subjected to a primary anodic oxidation, ultrasonic cleaning and secondary anodic oxidation to form a titanium dioxide nanotube array; the titanium dioxide nanotube array is subjected to low temperature annealing; the titanium dioxide nanotube array is quickly peeled from a substrate titanium through high-voltage anodization to obtain the titanium dioxide nanotube self-supporting film with a regular shape and two transparent ends. The preparation method is simple, low in price, environment-friendly and beneficial for large-scale application. The low temperature annealing treatment can effectively protect the strength and the thickness of the film and has very important effect on the film application. The preparation method and the application of the transparent titanium dioxide nanotube film utilize intelligent response functions of ion channels in titanium dioxide nanotube film simulated organisms to built artificial ion channels with photoresponse, and overcome the instability of organic materials in the traditional artificial ion channels and the limitation of biological material application.

Description

technical field [0001] The invention belongs to the field of nanotechnology, and relates to the preparation of a titanium dioxide nanotube array, in particular to the preparation of a self-supporting film with two ends of the titanium dioxide nanotube and its application in an artificial ion channel. Background technique [0002] Ion channels in organisms can intelligently control the transmission of ions, thereby maintaining the normal functional activities of cells such as material exchange, signal transmission, and energy exchange. Inspired by ion channels, artificial ion channels that respond intelligently to external fields have potential applications in micro-nano devices, drug delivery and release, and biosensors. Among them, photoresponsive artificial ion channels, which can convert light signals into multiple detectable signals, thereby realizing remote and non-destructive in situ control, have attracted extensive attention. Traditional light-responsive artificial ...

Claims

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Application Information

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IPC IPC(8): C25D11/26B82Y40/00
Inventor 胡子莹刘兆阅江雷
Owner BEIHANG UNIV
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