Preparation method of CdSe/CdS quantum dot sensitized TiO2 nanometer tube composite film

A technology of nanotube compounding and quantum dot sensitization, which is applied in the field of preparation of CdSe/CdS quantum dot sensitized TiO2 nanotube composite film, can solve the problems of no photogenerated cathodic protection effect of the film and low photoelectric efficiency of the film, and achieve improved photoelectricity Chemical properties, effect of improving stability

Inactive Publication Date: 2012-02-15
XIAMEN UNIV
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Problems solved by technology

[0005] The object of the present invention is to aim at pure TiO 2 The photoelectric efficiency of the film is low and the film has no photogenerated cathodic protection effect when it turns into a dark state after being illuminated

Method used

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  • Preparation method of CdSe/CdS quantum dot sensitized TiO2 nanometer tube composite film
  • Preparation method of CdSe/CdS quantum dot sensitized TiO2 nanometer tube composite film
  • Preparation method of CdSe/CdS quantum dot sensitized TiO2 nanometer tube composite film

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Embodiment Construction

[0027] According to the specific steps introduced in the above technical scheme, prepare CdSe / CdS quantum dot sensitized TiO 2 Nanotube composite film, and then test the photogenerated cathodic protection effect of the composite film as a photoanode on 403 stainless steel in a corrosive medium.

[0028]A rectangular pure titanium foil with a thickness of 0.1 mm is used as a sample, and the length and width are 15 mm and 10 mm, respectively. After the surface of the sample was polished with No. 400-1500 water abrasive paper in turn, it was ultrasonically cleaned in acetone, absolute ethanol and deionized water for 10 minutes.

[0029] Weigh 4.5g of ammonium fluoride, dissolve it in 333mL of deionized water, add 500mL of glycerol, and mix well. At room temperature, using Pt as a counter electrode, in the above solution, anodized at 20V for 30min. Then the samples were calcined at 450 °C for 2.0 h in a muffle furnace and then cooled to room temperature with the furnace.

[003...

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Abstract

The invention provides a preparation method of a CdSe/CdS quantum dot sensitized TiO2 nanometer tube composite film, which relates to a nanometer tube composite film. A titanium foil is used as a substrate, ammonium fluoride is dissolved into deionized water, glycerin is added for carrying out calcination after the anode oxidation, CdS quantum dos are firstly deposited on the surface of a TiO2 nanometer tube array film, Cd(NO3)2 ethanol solution and Na2S methanol solution are respectively used as reaction solution, firstly, TiO2 nanometer tube array film samples are soaked in Cd<2+> ethanol solution, then, ethanol is used for flushing, next, the samples are soaked into methanol solution containing S<2-> and are than flushed by the ethanol, CdS/TiO2 composite films are obtained, the obtained CdS/TiO2 composite films are placed into mixed solution consisting of Na2SeSO3, Cd(NO3)2 and Na3NTA solution for carrying out deposition reaction, and the CdSe/CdS quantum dot sensitized TiO2 nanometer tube composite film is obtained.

Description

technical field [0001] The invention relates to a nanotube composite film, in particular to a CdSe / CdS quantum dot sensitized TiO 2 Preparation method of nanotube composite film. Background technique [0002] Cathodic protection is to polarize the protected metal cathode by applying an external current or connecting a sacrificial anode, that is, to reduce the metal electrode potential to the protection potential range to achieve the purpose of corrosion prevention. It is an important method to prevent or control metal corrosion. However, this method requires consumption of electrical energy or anode metal material. In 1995, Yuan and Tsujikawa found that under light conditions, the surface is covered with TiO 2 The electrode potential of the coated Cu electrode shifts negatively under the irradiation of ultraviolet light, which has a cathodic protection effect on Cu. As a result, a new cathodic protection technology has been developed, that is, photogenerated cathodic prot...

Claims

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Application Information

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IPC IPC(8): C23C18/00C25D11/26
Inventor 杜荣归张娟林泽泉朱燕峰林昌健
Owner XIAMEN UNIV
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