MnS/TiO2 composite nanotube array film for photo-induced cathodic protection and preparation and application thereof

A photo-generated cathodic protection and nanotube array technology, applied in the field of composite nanotube photoanode, can solve the problems of inconvenient power supply and no economic loss, and achieve the effects of regular morphology, wide absorption range and uniform tube diameter

Active Publication Date: 2015-06-17
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of changing the composition of metal materials is ineffective for the steel structure that has been built; the method of adding a protective layer to the metal surface is more effective, but it is difficult for the coating to be free of leaks and voids, and aging must also be considered and other issues; the sacrificial anode protection method needs to replace the anode parts from time to time, and the economic loss has not been reduced to the minimum; the external electric cathode electric protection method requires continuous DC power supply, so it is not suitable for situations where power supply is inconvenient, such as ocean-going platforms, etc.

Method used

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  • MnS/TiO2 composite nanotube array film for photo-induced cathodic protection and preparation and application thereof
  • MnS/TiO2 composite nanotube array film for photo-induced cathodic protection and preparation and application thereof
  • MnS/TiO2 composite nanotube array film for photo-induced cathodic protection and preparation and application thereof

Examples

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Effect test

Embodiment 1

[0040] MnS / TiO for Photogenerated Cathodic Protection 2 Preparation of composite nanotube array film photoanode:

[0041] A titanium sheet with a size of 20*15*0.1mm was cut from a titanium foil with a purity of more than 99.9% as the substrate, ultrasonically cleaned in acetone, absolute ethanol, and deionized water successively for 1 min, and dried in the air for use.

[0042] 0.45gNH 4 F dissolved in 2.5mLH 2 O, then add 6mL H 2 o 2 and 6mLHNO 3 Make it into a polishing solution, put the cleaned titanium sheet into the polishing solution and polish it for 1 minute, then clean it with distilled water and dry it for later use.

[0043] Weigh 0.22g NH 4 F, dissolve in 4mL deionized water, add 40mL ethylene glycol and stir well as working solution. At room temperature, the pretreated titanium substrate is used as the anode, and the platinum sheet is used as the cathode. The titanium substrate is anodized at 20V for 2 hours in the working solution, ultrasonically cleaned ...

Embodiment 2

[0050] MnS / TiO for Photogenerated Cathodic Protection 2 Preparation of composite nanotube array film photoanode:

[0051] A titanium sheet with a size of 20*15*0.1mm was cut from a titanium foil with a purity of more than 99.9% as the substrate, ultrasonically cleaned in acetone, absolute ethanol, and deionized water successively for 1 min, and dried in the air for use.

[0052] 0.45gNH 4 F dissolved in 2.5mLH 2 O, then add 6mL H 2 o 2 and 6mLHNO 3 Make it into a polishing solution, put the cleaned titanium sheet into the polishing solution and polish it for 1 minute, then clean it with distilled water and dry it for later use.

[0053] Weigh 0.22g NH 4 F, dissolve in 4mL deionized water, add 40mL ethylene glycol and stir well as working solution. At room temperature, with the treated titanium substrate as the anode and the platinum sheet as the cathode, the titanium substrate was anodized at 20V for 2 hours in the working solution, ultrasonically cleaned for 1 minute, ...

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Abstract

The invention discloses a MnS/TiO2 composite nanotube array film for photo-induced cathodic protection and preparation and an application thereof, and relates to a composite nanotube photo-anode. The method includes the following steps: 1) substrate pretreatment: selecting a titanium foil as a substrate, carrying out ultrasonic cleaning successively in acetone, absolute ethyl alcohol and deionized water; 2) preparation of a TiO2 nanotube array thin film: adopting a two-step anodic oxidation method, with a platinum sheet as a counter electrode, in a working fluid, carrying out oxidization and calcination treatment on a titanium sheet, and generating a regular-morphology TiO2 nanotube array thin film on the substrate surface; and 3) preparation of the MnS/TiO2 composite film: adopting a continuous ionic layer adsorption reaction method, modifying TiO2 with MnS, and then carrying out calcination treatment to obtain the MnS/TiO2 nanotube array composite photo-anode. The method can significantly reduce the corrosion potential of 304 stainless steel, and has the characteristics of simple, feasible, safe and reliable operations, and high photoelectric conversion efficiency and stable performance of the product.

Description

technical field [0001] The invention relates to a composite nanotube photoanode, in particular to a MnS / TiO used for photogenerated cathodic protection 2 Composite nanotube array film and its preparation and application. Background technique [0002] Metal corrosion is the destructive loss caused by physical or chemical reactions between metal materials and the surrounding environment, and it is common in many industries. According to incomplete statistics, the global annual steel production exceeds 1 billion tons, and the steel equipment scrapped due to corrosion is equivalent to about 30% of the annual production. In reality, stainless steel is widely used in petrochemical, construction, life, navigation, aviation and other fields. The biggest advantage of stainless steel is that it is not rusty, and it has the ability to resist acid, alkali and salt. Its corrosion resistance is related to the chemical composition of the steel itself and the environment in which the stai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/16
Inventor 王秀通张巧霞李红张亮韦秦怡
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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