Composite film for photocathode protection and its preparation method and application

A technology of photocathode and composite film, which is applied in the direction of electrolytic inorganic material plating, coating, etc., can solve the problems of unsatisfactory photoelectrochemical cathodic protection effect, inability to transfer photogenerated electrons quickly, and ineffective use of solar energy, etc., to achieve the goal of expanding light Effects of absorption utilization efficiency, high-efficiency photocathode protection, and low conduction band potential

Active Publication Date: 2022-05-20
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

However, most of the semiconductor materials used in photocathode protected photoanodes are TiO 2 And ZnO and other wide-bandgap semiconductor materials, they are ultraviolet light response, can not match the solar spectrum well, so can not effectively use solar energy
More importantly, their conduction band potential is higher or slightly lower than the self-corrosion potential of the steel bar, and the photogenerated electrons cannot be transferred quickly or at all to the protected steel bar (metals with lower self-corrosion potential and more prone to corrosion, Such as Q235), resulting in unsatisfactory photoelectrochemical cathodic protection effect

Method used

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  • Composite film for photocathode protection and its preparation method and application
  • Composite film for photocathode protection and its preparation method and application
  • Composite film for photocathode protection and its preparation method and application

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preparation example Construction

[0033] The present invention aims at the unsatisfactory problem of the photoelectrochemical cathodic protection effect existing in the semiconductor material that the current photocathode protection photoanode adopts, and provides a kind of preparation method of the composite film that is used for photocathode protection, comprises the following steps:

[0034] (1) cleaning and acid-treating the conductive glass; (2) depositing ZnO nanowires on the surface of the conductive glass obtained in step (1) by electrodeposition; (3) depositing ZnO nanowires on the surface of the ZnO nanowires by hydrothermal method deposited CuIn 5 S 8 , resulting in ZnO-CuIn 5 S 8 The composite membrane is the composite membrane used for photocathode protection.

[0035] In a preferred embodiment of the present invention, the cleaning includes sequentially placing the conductive glass in the first solution, the second solution, the third solution and the fourth solution to perform ultrasonic clea...

Embodiment 1

[0054] 1. The ZnO-CuIn used for photocathode protection in this embodiment 5 S 8 The preparation method of composite membrane may further comprise the steps:

[0055] (1) Before the hydrothermal reaction experiment, it needs to be thoroughly cleaned. The purpose is to improve the adhesion between the film and the glass. Put the ITO conductive glass into the aqueous solution containing detergent, the ethanol solution of NaOH, the acetone and in a beaker of deionized water, and ultrasonically cleaned for 10 minutes to clean it. Then soak in dilute hydrochloric acid with pH = 1 for 2-3 minutes to make the surface adsorb a large amount of H + , rinsed with deionized water and dried at 60°C for later use.

[0056] (2) Add 500mmolL to the electrolytic cell -1 The mixed solution of zinc sulfate and KCl is adjusted to pH = 1 with sulfuric acid to obtain an electrochemical deposition solution. A three-electrode system is used, with the ITO conductive glass obtained in step (1) as ...

Embodiment 2

[0064] 1. The ZnO-CuIn used for photocathode protection in this embodiment 5 S 8 The preparation method of composite membrane may further comprise the steps:

[0065] (1) Before the hydrothermal reaction experiment, it needs to be thoroughly cleaned. The purpose is to improve the adhesion between the film and the glass. Put the FTO conductive glass into the aqueous solution containing detergent, the ethanol solution of NaOH, and the ethanol in order. and a beaker in deionized water, and ultrasonically cleaned for 20 minutes to clean it. Then soak in dilute hydrochloric acid with pH = 6 for 2-3 minutes to make the surface adsorb a large amount of H + , rinsed with deionized water and dried at 100°C for use.

[0066] (2) Add 1molL to the electrolytic cell -1 The mixed solution of zinc acetate and NaCl was adjusted to pH=1.5 with sulfuric acid to obtain an electrochemical deposition solution. Using a three-electrode system, the FTO conductive glass obtained through step (1) ...

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Abstract

The invention belongs to the technical field of anti-corrosion technology for concrete structural steel bars of marine engineering buildings, and in particular relates to a composite film used for photocathode protection and a preparation method and application thereof. The preparation method of the composite film for photocathode protection comprises the following steps: (1) cleaning and acid treatment of the conductive glass; (2) depositing ZnO on the surface of the conductive glass obtained through the treatment of step (1) by electrodeposition nanowires; (3) depositing CuIn on the surface of the ZnO nanowires by hydrothermal method 5 S 8 , that is, a composite film for photocathode protection. The composite film for photocathode protection of the present invention can be used for high-efficiency photocathode protection of concrete structural steel bars of marine engineering buildings, and prolongs the service life of marine engineering structures.

Description

technical field [0001] The invention belongs to the technical field of anti-corrosion technology for concrete structural steel bars of marine engineering buildings, and in particular relates to a composite film used for photocathode protection and a preparation method and application thereof. Background technique [0002] Reinforced concrete is currently the most widely used construction and foundation engineering material in the world, and plays a pivotal role in the construction and development of the national economy. In recent years, with the rapid development of my country's economy and society and the continuous expansion of engineering application fields, reinforced concrete foundation projects have continued to extend to harsh environments such as oceans, deep seas, high saline soils, and extreme cold, and structural corrosion and protection are facing unprecedented challenges. [0003] At present, there are many kinds of corrosion protection measures, among which ca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C17/34C23F13/12C23F13/20C25D9/04
CPCC03C17/347C23F13/12C23F13/20C25D9/04C23F2201/02C03C2217/231C03C2217/241C03C2217/216C03C2218/31C03C2217/70Y02E60/36
Inventor 金祖权张小影蒋继宏王晓晴
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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