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Photo-anode film for reinforcing steel bar photoelectric cathode protection and preparation method and application thereof

A photocathode and photoanode technology, applied in electrolytic organic material coating, liquid chemical plating, coating and other directions, can solve the problems of low photo-generated electron-hole separation efficiency and poor cathodic protection effect, and achieve the expansion of light absorption and utilization Efficiency, increasing separation and transfer, effect of increasing separation efficiency

Active Publication Date: 2022-02-18
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More importantly, the position of the lowest unoccupied molecular orbital of PANI (its English abbreviation is LUMO) is relatively negative. From a thermodynamic point of view, it can provide cathodic protection current for steel bars, but its photogenerated electron-hole separation efficiency is low, and the cathodic protection effect poor

Method used

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  • Photo-anode film for reinforcing steel bar photoelectric cathode protection and preparation method and application thereof
  • Photo-anode film for reinforcing steel bar photoelectric cathode protection and preparation method and application thereof
  • Photo-anode film for reinforcing steel bar photoelectric cathode protection and preparation method and application thereof

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preparation example Construction

[0031] Ru-Fe used for steel bar photocathode protection of the present invention 2 o 3 -The preparation method of PANI composite photoanode film, described preparation method comprises the following steps:

[0032] Step 1, using iron salt and urea as raw materials, prepare Fe on the conductive surface of a clean conductive substrate by hydrothermal method 2 o 3 ;

[0033] Step two, by electrochemical synthesis in Fe 2 o 3 Deposit polyaniline on the surface of Fe 2 o 3 -PANI composite photoanode film;

[0034] Step 3, by in situ chemical reduction method in Fe 2 o 3 - Surface preparation of PANI composite photoanode film to obtain Ru-Fe 2 o 3 -PANI composite photoanode film.

[0035] The present invention uses Ru-Fe 2 o 3 -PANI composite film is used as the cathodic protection photoanode of marine concrete structure, which can significantly expand the efficiency of light absorption and utilization, and improve the separation efficiency of photogenerated charges. ...

Embodiment 1

[0053] The Ru-Fe of this embodiment 2 o 3 -The preparation method of PANI composite photoanode film comprises the following steps:

[0054] First of all, before the hydrothermal reaction experiment, the FTO conductive glass needs to be thoroughly cleaned. The purpose is to improve the adhesion between the film and the FTO conductive glass. Put the FTO conductive glass into washing powder water and NaOH saturated ethanol in sequence. Solution, ethanol, and deionized water beakers, and ultrasonically cleaned in the above solution for 15 minutes in turn, and dried at 60°C for use. Then add 0.05 mmolL -1 of ferric chloride and 0.1 mmolL -1 Add the mixed solution of urea into the reaction kettle, adjust the pH of the mixed solution to 9 by adding sodium hydroxide, put the conductive side of the FTO conductive glass down into the mixed solution, control the hydrothermal temperature to 100°C, and the hydrothermal reaction time After 16 hours, after the reaction kettle was cooled,...

Embodiment 2

[0057] The Ru-Fe of this embodiment 2 o 3 -The preparation method of PANI composite photoanode film comprises the following steps:

[0058] First, before the hydrothermal reaction experiment, the FTO conductive glass needs to be thoroughly cleaned. The purpose is to improve the adhesion between the film and the FTO conductive glass. Put the FTO conductive glass into soapy water, NaOH ethanol solution, and ethanol in order. and a beaker in deionized water, and ultrasonically cleaned in the above solution for 15 minutes in turn, and dried at 60°C for use. Then add 0.5mmolL -1 of iron acetylacetonate and 0.5 mmolL -1 Add the mixed solution of urea into the reaction kettle, adjust the pH of the solution to 10 by adding potassium hydroxide, put the conductive side of the FTO conductive glass down into the mixed solution, control the hydrothermal temperature to 130°C, and the hydrothermal reaction time is 10 h, after the reaction kettle was cooled, the resulting solution was was...

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Abstract

The invention belongs to the technical field of corrosion inhibition of ocean engineering concrete structure metal materials, and particularly relates to a photo-anode film for reinforcing steel bar photoelectric cathode protection and a preparation method and application thereof. The preparation method comprises the following steps: with ferric salt and urea as raw materials, preparing Fe2O3 on a conductive surface of a clean conductive substrate through a hydrothermal method; making polyaniline deposited on the surface of Fe2O3 through an electrochemical synthesis method to prepare a Fe2O3-PANI composite photo-anode film; and preparing the Ru-Fe2O3-PANI composite photo-anode film on the surface of the Fe2O3-PANI composite photo-anode film through an in-situ chemical reduction method. According to the technical scheme, efficient photoelectric cathode protection of the ocean engineering concrete reinforcement can be achieved, and the durability of an ocean engineering concrete structure is improved.

Description

technical field [0001] The invention belongs to the technical field of corrosion inhibition of metal materials for marine engineering concrete structures, and in particular relates to a photoanode film used for photocathode protection of steel bars, a preparation method and application thereof. Background technique [0002] With the development of the economy, marine resources are increasingly being exploited by people, and there are more and more concrete buildings in the marine environment. In the high-temperature, high-salt special environment of marine engineering and near-shore structures, concrete structures are more likely to be corroded and damaged, and once the concrete buildings are damaged, maintenance will be very troublesome or even impossible. In view of economic, resource and safety factors, anti-corrosion damage and improving the durability of concrete structures have become the focus of civil engineering research, and the anti-corrosion work of marine engine...

Claims

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Application Information

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IPC IPC(8): C03C17/42C03C17/38C23F13/12C23F13/20C25D9/02C23C18/44
CPCC03C17/42C03C17/38C23F13/12C23F13/20C25D9/02C23C18/44C23F2201/02C03C2217/231C03C2217/217C03C2217/254C03C2217/70C03C2218/111Y02E10/542C23F2213/31C23C18/1216C25D13/22C09D5/4476C03C2217/78C25D9/08
Inventor 金祖权张小影蒋继宏王晓晴
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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