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Preparation method for Ag/SnO2/TiO2 composite membrane photoanode used for photogenerated cathodic protection

A photo-generated cathodic protection and composite film technology, applied in liquid chemical plating, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problem of low utilization rate of sunlight of thin film, difficult to maintain good photo-generated cathodic protection effect, low photoelectric efficiency, etc. problems, to achieve excellent photocathode protection effect, good stability effect, and uniform coating effect

Active Publication Date: 2014-07-30
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the TiO prepared in the past 2 In order to solve the problems of low utilization rate of sunlight, low photoelectric efficiency and difficulty in maintaining a good photo-generated cathodic protection effect in the dark state, a Ag / SnO film for photo-generated cathodic protection is provided. 2 / TiO 2 Preparation method of composite film photoanode

Method used

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  • Preparation method for Ag/SnO2/TiO2 composite membrane photoanode used for photogenerated cathodic protection
  • Preparation method for Ag/SnO2/TiO2 composite membrane photoanode used for photogenerated cathodic protection
  • Preparation method for Ag/SnO2/TiO2 composite membrane photoanode used for photogenerated cathodic protection

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Experimental program
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Effect test

Embodiment 1

[0035] According to the above technical scheme (specific steps), prepare TiO 2 and Ag / SnO 2 / TiO 2 Nano-film, and test the cathodic protection effect of the film as a photoanode on 304 stainless steel.

[0036] 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.

[0037] Weigh 0.5g NH 4 F, dissolved in 6 mL of deionized water, added 100 mL of ethylene glycol and mixed to obtain a mixed solution. At room temperature, with the cleaned titanium foil substrate as the anode and the foil as the cathode, anodize at 30V for 30min in the above mixed solution. Then the sample was placed in a muffle furnace and calcined at 450 °C for 2 hours, and then cooled to room temperature with the furnace, that is, TiO was prepared on the surface of the titanium foil substrate. 2 nanotube array film.

[0038] 16.74g SnCl 2 2H 2 O was fu...

Embodiment 2

[0046] According to the above technical scheme (specific steps), prepare TiO 2 and Ag / SnO 2 / TiO 2 Nano-film, and test the cathodic protection effect of the film as a photoanode on 304 stainless steel.

[0047] 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.

[0048] Weigh 0.5g NH 4 F, dissolve in 6mL deionized water, add 100mL ethylene glycol, and mix well. At room temperature, with the cleaned titanium foil substrate as the anode and the foil as the cathode, anodize at 30V for 30min in the above mixed solution. Then the sample was placed in a muffle furnace and calcined at 450 °C for 2 hours, and then cooled to room temperature with the furnace, that is, TiO was prepared on the surface of the titanium foil substrate. 2 nanotube array film.

[0049] 16.74g SnCl 2 2H 2 O was fully dissolved in 200mL ethanol, he...

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Abstract

The invention relates to preparation methods for an Ag / SnO2 / TiO2 composite membrane photoanode used for photogenerated cathodic protection, and relates to a composite membrane photoanode, and provides a preparation method for the efficient stable Ag / SnO2 / TiO2 composite membrane photoanode used for photogenerated cathodic protection. The preparation method comprises: 1) preparing a titanium substrate sample, specifically taking titanium foil as a substrate, and performing ultrasonic cleaning successively in acetone, absolute ethanol and deionized water to obtain a titanium substrate sample; 2) preparing a titanium-surface TiO2 nanotube array membrane, specifically dissolving NH4 in deionized water, adding glycol, mixing uniformly, taking platinum as a counter electrode, performing anodization, calcining the titanium substrate sample, and cooling to room temperature along the furnace, so as to obtain the TiO2 nanotube array membrane on the surface of titanium; and 3) preparing the Ag / SnO2 / TiO2 composite membrane, specifically preparing Ag and SnO2 nanometer particles on the surface of the TiO2 nanotube array membrane, so as to obtain the Ag / SnO2 / TiO2 photoanode used for photogenerated cathodic protection.

Description

technical field [0001] The invention relates to a composite film photoanode, in particular to a Ag / SnO used for photogenerated cathodic protection 2 / TiO 2 A method for preparing a composite film photoanode. Background technique [0002] TiO 2 It is an important multifunctional inorganic semiconductor material and has broad application prospects in the fields of gas sensor, pollutant degradation, solar hydrogen production and solar cells. In recent years, Li et al. have made TiO under light 2 The thin film is connected to the metal through the wire, and the photogenerated electrons generated by it are transferred to the metal surface through the wire, so that the electrode potential of the metal is lowered, which can play a role in cathodic protection for the metal (Li H Y, Bai X D, et al., Fabrication of titania nanotubes as cathode protection for stainless steel, Electrochemical and Solid-state Letters, 2006, 9: B28-B31), so TiO 2 The preparation of thin films and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/08C25D11/26C23C18/12C23C18/14
Inventor 李红侯保荣王秀通
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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