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Bi2O2CO3/TiO2 composite material and method for photo-generated cathode protection in spoondrift splash area

A photo-generated cathodic protection and spray technology, which is applied in metal material coating process, electrolytic coating, superimposed layer plating, etc. Excellent photocatalytic effect

Active Publication Date: 2019-08-09
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Bi2O2CO3/TiO2 composite material and method for photo-generated cathode protection in spoondrift splash area
  • Bi2O2CO3/TiO2 composite material and method for photo-generated cathode protection in spoondrift splash area
  • Bi2O2CO3/TiO2 composite material and method for photo-generated cathode protection in spoondrift splash area

Examples

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Effect test

Embodiment 1

[0026] 1. Take a flat and smooth rectangular pure titanium sheet with a thickness of 0.3 mm, and ultrasonically clean it with acetone, absolute ethanol, and distilled water for 10 minutes each until the surface is reflective.

[0027] 2. Weigh 1.72g of ammonium fluoride into 50g of water, stir well, then add 450mL of ethylene glycol, stir overnight to make ammonium fluoride solution (NH 4 F solution). At room temperature, the titanium foil substrate cleaned in the above step 1 was used as the anode, and the platinum sheet was used as the cathode. 4 In solution F, anodize at 60V for 1h. Rinse with distilled water, ultrasonicate in 0.1M hydrochloric acid solution for 30min until the surface is smooth and bright, and dry for later use.

[0028] 3. Place the oxidized sample in a muffle furnace for calcination at 450°C for 2 hours, and then cool to room temperature with the furnace to obtain a TiO2 matrix.

[0029] 4. Weigh 1.0g urea, 4.9g Bi(NO 3 ) 3 ·5H 2 O to 80ml of water...

Embodiment 2

[0039] 1. Take a flat and smooth rectangular pure titanium sheet with a thickness of 0.2mm, and ultrasonically clean it with acetone, absolute ethanol, and distilled water in sequence until the surface is reflective.

[0040] 2. Weigh 0.18g of ammonium fluoride into 5g of distilled water, stir well, then add 45mL of ethylene glycol, stir overnight to make ammonium fluoride solution. At room temperature, use the titanium foil substrate cleaned in the above step 1 as the anode, and the platinum sheet as the cathode, and anodize at a voltage of 50V for 80 minutes in the above ammonium fluoride solution. Rinse with distilled water and set aside.

[0041] 3. Place the oxidized sample in a muffle furnace for calcination at 400°C for 1 hour, and then cool to room temperature with the furnace to obtain TiO 2 matrix.

[0042] 4. Weigh 5g of urea and 4.9g of bismuth nitrate pentahydrate into 80ml of double distilled water, and stir for half an hour until the raw materials are dissolve...

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Abstract

The invention relates to a photo-anode composite material, in particular to a preparation method of a Bi2O2CO3 / TiO2 photo-anode composite material for photo-generated cathode protection in a spoondrift splash area. The composite material is characterized in that a TiO2 matrix obtained through anodic oxidation treatment is placed in a solution with bismuth nitrate pentahydrate as a bismuth source,urea as a carbon source and water as a solvent to carry out hydrothermal reaction so as to obtain the Bi2O2CO3 / TiO2 composite material. Compared with a TiO2 matrix, the prepared composite material photo-anode has the larger photo-generated current density and more negative open circuit potential under visible light irradiation, and effectively prevents corrosion of 304 stainless steel.

Description

technical field [0001] The invention relates to a photoanode composite material, in particular to a Bi for photogenerated cathodic protection in spray splash areas 2 o 2 CO 3 / TiO 2 Preparation method of photoanode composite material. Background technique [0002] From the perspective of the marine environment, the steel structure corrosion area can be divided into five areas: the marine atmosphere area, the spray splash area, the seawater tidal range area, the seawater full immersion area and the submarine mud area. Due to the unique marine environment of the spray splash area, The corrosion rate of steel in this area is the fastest and the corrosion degree is the most serious. The spray splash area of ​​the marine steel structure has been subject to periodic humidity for a long time, sufficient oxygen supply, high ion concentration, high sunlight intensity and other factors, resulting in extremely fast corrosion in this area. Therefore, it is of great significance to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/12C25D11/26C23C18/12C23C28/04
CPCC23C18/1216C23C28/042C23F13/12C25D11/26
Inventor 马秀敏马峥王秀通侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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