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Preparation method of photo-anode of ZnS/Au/TiO2 nano composite film

A nanocomposite and photoanode technology, applied in the field of photoanode, can solve the problems of poor photocathode protection effect and low photoelectric conversion efficiency of nanomaterials, so as to improve the protection effect, reduce the recombination probability, and increase the photocurrent effect

Inactive Publication Date: 2012-09-26
XIAMEN UNIV
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Problems solved by technology

[0005] The purpose of the present invention is to aim at existing pure TiO 2 Nanomaterials have low photoelectric conversion efficiency and poor photogenerated cathodic protection effect, and provide a method that can reduce the recombination probability of photogenerated electron-hole pairs and further improve TiO 2 Excellent photoelectric conversion efficiency, ZnS / Au / TiO with good photogenerated cathodic protection 2 Preparation method of nanocomposite film photoanode

Method used

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  • Preparation method of photo-anode of ZnS/Au/TiO2 nano composite film
  • Preparation method of photo-anode of ZnS/Au/TiO2 nano composite film
  • Preparation method of photo-anode of ZnS/Au/TiO2 nano composite film

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Embodiment Construction

[0028] According to the above-mentioned technical scheme (concrete steps), prepare ZnS / Au / TiO 2 Nanocomposite film photoanode, and test the cathodic protection effect of this film on 403 stainless steel.

[0029] First, take a pure titanium foil sample with a thickness of 0.1 mm, a length of 2.0 cm, and a width of 1.0 cm, and pass through 10% (w) HNO at room temperature 3 +1% (w) HF solution etching treatment for 1 min, followed by ultrasonic cleaning in acetone, absolute ethanol and deionized water for 30 min to complete the pretreatment of the titanium matrix sample.

[0030] TiO 2 Preparation of the nanotube array film: at room temperature, with the treated titanium foil as the anode and the platinum sheet as the cathode, apply a voltage of 20V in 0.5% (w) HF solution, and anodize the sample for 30 minutes. After the reaction, the samples were washed with deionized water, dried and placed in a muffle furnace for heat treatment at 450 °C for 2 h.

[0031] Au-modified TiO ...

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Abstract

The invention relates to a preparation method of a photo-anode of a ZnS / Au / TiO2 nano composite film, relating to the photo-anode. The preparation method comprises the following steps of: carrying out etching treatment with a solution containing 10% (w) of HNO3 and 1% (w) of HF on a titanium foil as a substrate and cleaning the treated titanium foil; carrying out electrochemical anodic oxidation by using the substrate as an anode and a platinum piece as a cathode, cleaning and drying a prepared sample, and carrying out thermal treatment on the sample to obtain the substrate with a TiO2 nonatube array film prepared on the titanium surface; adding an NaOH solution into an HAuCl4 solution to obtain a mixed solution; and then placing the substrate with the TiO2 nonatube array film prepared on the titanium surface into the mixed solution to react to obtain the substrate with an Au-modified TiO2 nonatube array film; and by using a Zn(NO3)2 ethanol solution as a Zn source and a Na2S methyl alcohol solution as an S source, soaking the surface of the Au-modified TiO2 nonatube array film into the solutions which are used as the Zn source and the S source in sequence, and then cleaning the soaked film to obtain the photo-anode of the ZnS / Au / TiO2 nano composite film.

Description

technical field [0001] The invention relates to a photoanode, in particular to a ZnS / Au / TiO 2 Preparation method of nanocomposite film photoanode. Background technique [0002] Due to its excellent physical and chemical properties, stainless steel has been widely used in the fields of machinery, construction, military industry, chemical medicine, energy, and household durable consumer goods. The "stainless" of stainless steel is relative to corrosion resistance. Under some conditions, especially in the environment where chloride ions exist, stainless steel is prone to local corrosion damage such as pitting corrosion, crevice corrosion, intergranular corrosion and corrosion fatigue. Therefore, controlling or preventing corrosion of stainless steel is a very important issue. So far, a variety of surface treatment technologies and coating technologies have been used to improve the corrosion resistance of stainless steel, but there are still many problems to be solved. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/042H01G9/20H01M14/00H01L51/48
CPCY02E10/549
Inventor 杜荣归朱燕峰张娟漆海清林昌健
Owner XIAMEN UNIV
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