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Preparation method of Ag2S/TiO2 composite film photo-anode for photoproduction cathode protection

A technology of photogenerated cathodic protection and composite film, which is applied in the direction of surface coating liquid devices, electrolytic coatings, surface reaction electrolytic coatings, etc., to achieve the effects of coating integrity, excellent photogenerated cathodic protection effect, and good stability effect

Inactive Publication Date: 2013-07-17
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the "stainless" of stainless steel is relative. In many environments, the corrosion phenomenon of stainless steel is still serious, and certain measures are still needed to control its corrosion.

Method used

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  • Preparation method of Ag2S/TiO2 composite film photo-anode for photoproduction cathode protection
  • Preparation method of Ag2S/TiO2 composite film photo-anode for photoproduction cathode protection
  • Preparation method of Ag2S/TiO2 composite film photo-anode for photoproduction cathode protection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] According to above-mentioned technical scheme (concrete steps), prepare Ag 2 S / TiO 2 Nano film, and test the cathodic protection effect of the film as a photoanode on 403 stainless steel.

[0030] Take a rectangular pure titanium foil with a thickness of 0.1 mm as a sample, which is 15 mm long and 10 mm wide. Sequentially ultrasonic cleaning in acetone, absolute ethanol and deionized water for 10 min.

[0031] Weigh 5.233g NH 4 F, dissolve in 423mL deionized water, add 500mL glycerol, and mix well. At room temperature, with the cleaned titanium foil as the anode and the platinum sheet as the cathode, anodize at 20V for 30min in the above mixed solution. Then the sample was placed in a muffle furnace and calcined at 450 °C for 2.0 h, and then cooled to room temperature with the furnace, that is, TiO was prepared on the Ti surface. 2 nanotube array film.

[0032] The prepared TiO 2 The nanotube array film was placed in a solution containing 0.1mol / L Ag + Aqueous e...

Embodiment 2

[0039] A rectangular pure titanium foil with a thickness of 0.1 mm is used as a sample, its length is 15 mm, and its width is 10 mm. Ultrasonic cleaning in acetone, absolute ethanol and deionized water for 10 min respectively.

[0040] Weigh 5.233g NH 4 F, dissolve in 423mL deionized water, add 500mL glycerol, and mix well. At room temperature, using platinum as the counter electrode, anodize at 20V for 30min in the above solution. Then the sample was placed in a muffle furnace and calcined at 450 °C for 2.0 h and cooled to room temperature with the furnace, that is, TiO was prepared on the Ti surface. 2 nanotube array film.

[0041] The prepared TiO 2 The nanotube array film was placed in a solution containing 0.05mol / L Ag + Aqueous ethanol ((0.4247g AgNO 3 Soak in 50mL ethanol aqueous solution (the volume ratio of water and ethanol is 1:9), take it out after soaking for 1min, wash with ethanol and dry naturally, then place the sample in 0.05mol / L Na 2 S in methanol so...

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Abstract

The invention provides a preparation method of an Ag2S / TiO2 composite film photo-anode for photoproduction cathode protection and relates to a composite film anode. The preparation method of the Ag2S / TiO2 composite film photo-anode for photoproduction cathode protection provided by the invention has high efficiency and low toxicity. The preparation method comprises the following steps of: (1) preparing a titanium substrate sample, namely with a titanium foil as a substrate, sequentially carrying out ultrasonic washing on the titanium foil in acetone, absolute ethyl alcohol and deionized water to obtain the titanium substrate sample; (2) preparing a TiO2 nanotube array film on the surface of titanium, namely dissolving NH4F in the ionized water, adding glycerol to uniformly mix, carrying out anode oxidation by using platinum as a counter electrode, calcining the sample, and cooling the sample along with a furnace to room temperature, and therefore, the TiO2 nanotube array film is prepared on the surface of the titanium; and (3) preparing an Ag2s / TiO2 composite film, namely preparing Ag2S nanoparticles on the surface of the TiO2 nanotube array film to prepare the Ag2S / TiO2 composite film photo-anode for photoproduction cathode protection.

Description

technical field [0001] The invention relates to a composite film photoanode, in particular to an Ag for photogenerated cathodic protection 2 S / TiO 2 A method for preparing a composite film photoanode. Background technique [0002] Titanium dioxide (TiO 2 ) is a semiconductor with excellent photoelectrochemical properties, which has been widely used in solar cells, photocatalytic degradation of pollutants, biomaterials, etc. In the 1990s, Yuan et al. prepared TiO on Cu substrates. 2 coating, TiO was found under light conditions 2 The electrode potential of / Cu decreases, indicating that TiO 2 The coating has a photogenerated cathodic protection effect on the Cu substrate (Yuan J N, Tsujikawa S, et al., Characterization of sol-gel-derived TiO 2 coatings and their photoeffects on copper substrates [J]. Journal of the Electrochemical Society, 1995, 142(10): 3444-3450). Subsequently, the Fujishima research group and the Tsujikawa research group reported coating nano-TiO on...

Claims

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Application Information

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IPC IPC(8): C23F13/08C25D11/26B05D1/18
Inventor 杜荣归徐璐朱燕峰张娟林昌健
Owner XIAMEN UNIV
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