Preparation of nano composite membrane photo-anode used for photo-induced cathodic protection

A photogenerated cathodic protection and nano-composite technology, which is applied in the direction of superimposed layer plating, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problems such as difficulty in maintaining the photogenerated cathodic protection effect, achieve excellent photogenerated cathodic protection effect, and improve photoluminescence. The absorption range and the effect of uniform load distribution

Active Publication Date: 2017-03-15
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 problems such as being difficult to maintain the photogenerated cathodic protection effect under the state of no light, provide a kind of ZnFe that is used for photogenerated cathodic protection 2 o 4 / TiO 2 Preparation method of nanocomposite film

Method used

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  • Preparation of nano composite membrane photo-anode used for photo-induced cathodic protection
  • Preparation of nano composite membrane photo-anode used for photo-induced cathodic protection
  • Preparation of nano composite membrane photo-anode used for photo-induced cathodic protection

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Embodiment 1

[0038] ZnFe 2 o 4 / TiO 2 Preparation method of nanocomposite film:

[0039] Take a rectangular pure titanium foil with a thickness of 0.1mm as a sample, cut out a titanium foil with a specification of 15×10mm, and clean it ultrasonically in methanol, acetone, isopropanol, polishing solution, and deionized water for 2 minutes. The ratio of the polishing liquid is HF:HNO 3 :H 2 O=1:4:5 (vol ratio).

[0040] Weigh 0.55gNH 4 F, dissolved in 1.3ml of ultrapure water, and added with 100ml of ethylene glycol. Mix well, at room temperature, use the pretreated titanium foil as the anode and the platinum sheet as the cathode, in the above electrolytic solution, anodize at 20V for 1h, then put the sample into a muffle furnace and calcinate at 450°C for 2h, Then cool down to room temperature with the furnace, that is, TiO is prepared on the surface of Ti 2 nanotube array film.

[0041] Configure ZnFe 2 o 4 solution, weigh 5mM Zn(NO 3 ) 2 and 10mM Fe(NO 3 ) 3 Mix, place on a...

Embodiment 2

[0047] ZnFe 2 o 4 / TiO 2 Preparation method of nanocomposite film:

[0048] Take a rectangular pure titanium foil with a thickness of 0.1mm as a sample, cut out a titanium foil with a specification of 15×10mm, and clean it ultrasonically in methanol, acetone, isopropanol, polishing solution, and deionized water for 2 minutes. The ratio of the polishing liquid is HF:HNO 3 :H 2 O=1:4:5 (vol ratio).

[0049] Weigh 0.55gNH 4 F, dissolved in 1.3ml of ultrapure water, and added with 100ml of ethylene glycol. Mix well, at room temperature, use the pretreated titanium foil as the anode and the platinum sheet as the cathode, in the above electrolytic solution, anodize at 20V for 1h, then put the sample into a muffle furnace and calcinate at 450°C for 2h, Then cool down to room temperature with the furnace, that is, TiO is prepared on the surface of Ti 2 nanotube array film.

[0050]Configure ZnFe 2 o 4 solution, weigh 25mM Zn(NO 3 ) 2 and 50mM Fe(NO 3 ) 3 Mix, place on a...

Embodiment 3

[0056] ZnFe 2 o 4 / TiO 2 Preparation method of nanocomposite film:

[0057] Take a rectangular pure titanium foil with a thickness of 0.1mm as a sample, cut out a titanium foil with a specification of 15×10mm, and clean it ultrasonically in methanol, acetone, isopropanol, polishing solution, and deionized water for 2 minutes. The ratio of the polishing liquid is HF:HNO 3 :H 2 O=1:4:5 (vol ratio).

[0058] Weigh 0.55gNH 4 F, dissolved in 1.3ml of ultrapure water, and added with 100ml of ethylene glycol. Mix well, at room temperature, use the pretreated titanium foil as the anode and the platinum sheet as the cathode, in the above electrolytic solution, anodize at 20V for 1h, then put the sample into a muffle furnace and calcinate at 450°C for 2h, Then cool down to room temperature with the furnace, that is, TiO is prepared on the surface of Ti 2 nanotube array film.

[0059] Configure ZnFe 2 o 4 solution, weigh 50mM Zn(NO 3 ) 2 and 100mM Fe(NO 3 ) 3 Mix, place on...

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Abstract

The invention relates to a nano composite membrane photo-anode, in particular to preparation of a ZnFe2O4 / TiO2 nano composite membrane photo-anode used for photo-induced cathodic protection. Preparation is completed through the steps that firstly, a TiO2 nanotube array membrane is obtained through an anodic oxidation method; and secondly, the TiO2 nanotube array membrane is loaded with ZnFe2O4 nano particles through a hydrothermal method. The ZnFe2O4 / TiO2 composite membrane prepared through the method has the characteristic that a coating is complete and uniform, can be used as a photo-anode for utilizing visible light; the connected and protected metal electrode potential during light irradiation is greatly lowered; and when a light source is turned off, the nano composite membrane photo-anode can still have a certain cathodic protection effect on metal in a dark state.

Description

technical field [0001] The invention relates to a nanocomposite film photoanode, in particular to a ZnFe used for photogenerated cathodic protection 2 o 4 / TiO 2 Preparation of nanocomposite film photoanodes. Background technique [0002] Nano-TiO 2 The material has become a research hotspot at home and abroad because of its good photoelectric properties, chemical stability and no power consumption. Among them, the protection of metal materials from corrosion in the medium environment, that is, the photogenerated cathodic protection effect, has aroused great interest of corrosion researchers. The photogenerated electrons migrate to the metal surface with a lower potential, resulting in an increase in the electron density on the metal surface. The macroscopic manifestation is that the electrode potential decreases, even far below the natural corrosion potential of the metal, so that the metal enters the thermodynamic stable state, that is, the cathodic protection state. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/12C25D11/26C23C26/00C23C28/04
CPCC23C26/00C23C28/042C23F13/12C25D11/26
Inventor 王秀通雷婧宁晓波韦秦怡李红李鑫冉
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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