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Preparation method of ZnIn2S4/TiO2 nanotube composite membrane photoanode for photocathodic protection

A technology of photogenerated cathodic protection and znin2s4, which is applied in the direction of superimposed layer plating, liquid chemical plating, electrolytic coating, etc., can solve problems such as difficulty in maintaining good photogenerated cathodic protection effect, low photoelectric efficiency, and reduction of metal corrosion potential, etc., to achieve Good cathodic protection effect, lower corrosion potential, good stability effect

Active Publication Date: 2018-02-23
QINGDAO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Prepared ZnIn 2 S 4 / TiO 2 Nanotube composite film has good photoelectric conversion performance, and as a composite film photoanode, it can produce excellent photogenerated cathodic protection, especially ZnIn 2 S 4 / TiO 2 Composite membrane in 0.1mol / L Na 2 S+0.2mol / L NaOH electrolyte solution can significantly reduce the corrosion potential of the metal, make the metal cathodically polarized, thereby inhibiting the corrosion of the metal, and then solve the problem of TiO 2 Thin films have problems such as low utilization rate of sunlight, low photoelectric efficiency, and difficulty in maintaining a good photogenerated cathodic protection effect in the dark state.

Method used

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  • Preparation method of ZnIn2S4/TiO2 nanotube composite membrane photoanode for photocathodic protection
  • Preparation method of ZnIn2S4/TiO2 nanotube composite membrane photoanode for photocathodic protection
  • Preparation method of ZnIn2S4/TiO2 nanotube composite membrane photoanode for photocathodic protection

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Experimental program
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Embodiment 1

[0041] According to above-mentioned technical scheme (concrete steps), prepare ZnIn 2 S 4 / TiO 2 Nanotube composite film, and test the cathodic protection effect of composite film as photoanode on carbon steel.

[0042] Take a rectangular pure titanium foil with a thickness of 0.1 mm as a sample, its length is 15 mm, and its width is 15 mm. First, the titanium foil is polished with a chemical polishing agent, wherein the polishing agent is 0.45g NH 4 F, 2.5mL H 2 O, 6mL HNO 3 and 6mL H 2 o 2 mixed solution. Then use deionized water, acetone, and absolute ethanol to clean ultrasonically and then dry it for use.

[0043] TiO 2 Preparation of nanotube array film: Weigh 0.45g NH 4 F, dissolved in 8 mL of deionized water, added 80 mL of ethylene glycol and mixed to obtain a mixed solution, to obtain a mixed solution. At room temperature, with the cleaned titanium foil substrate as the anode and the foil as the cathode, anodize at 30V for 2h in the above mixed solution. ...

Embodiment 2

[0051] According to above-mentioned technical scheme (concrete steps), prepare ZnIn 2 S 4 / TiO 2 Nanotube composite film, and test the cathodic protection effect of composite film as photoanode on carbon steel.

[0052] Take a rectangular pure titanium foil with a thickness of 0.1 mm as a sample, its length is 15 mm, and its width is 15 mm. First, the titanium foil is polished with a chemical polishing agent, wherein the polishing agent is 0.45g NH 4 F, 2.5mL H 2 O, 6mL HNO 3 and 6mL H 2 o 2 mixed solution. Then use deionized water, acetone, and absolute ethanol to clean ultrasonically and then dry it for use.

[0053] TiO 2 Preparation of nanotube array film: Weigh 0.45g NH 4 F, dissolved in 8 mL of deionized water, added 80 mL of ethylene glycol and mixed to obtain a mixed solution, to obtain a mixed solution. At room temperature, with the cleaned titanium foil substrate as the anode and the foil as the cathode, anodize at 30V for 2h in the above mixed solution. ...

Embodiment 3

[0062] According to above-mentioned technical scheme (concrete steps), prepare ZnIn 2 S 4 / TiO 2 Nanotube composite film, and test the cathodic protection effect of composite film as photoanode on carbon steel.

[0063] Take a rectangular pure titanium foil with a thickness of 0.1 mm as a sample, its length is 25 mm, and its width is 10 mm. First, the titanium foil is polished with a chemical polishing agent, wherein the polishing agent is 0.45g NH 4 F, 2.5mL H 2 O, 6mL HNO 3 and 6mL H 2 o 2 mixed solution. Then use deionized water, acetone, and absolute ethanol to clean ultrasonically and then dry it for use.

[0064] TiO 2 Preparation of nanotube array film: Weigh 0.45g NH 4F, dissolved in 8 mL of deionized water, added 80 mL of ethylene glycol and mixed to obtain a mixed solution, to obtain a mixed solution. At room temperature, with the cleaned titanium foil substrate as the anode and the foil as the cathode, anodize at 25V for 4h in the above mixed solution. T...

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Abstract

The invention discloses a preparation method of a ZnIn2S4 / TiO2 nanotube composite membrane photoanode for photocathodic protection. The parathion method comprises the following steps that 1) calcination is performed by taking a polished and cleaned titanium substrate as an anode and platinum as a counter electrode after anodizing in NH4F ethylene glycol water solutions, namely that TiO2 nanotube array membranes are prepared on the titanium substrate surface; the mass ratio of NH4F, water and ethylene glycol is 2:20-30:400 in the NH4F ethylene glycol water solutions; the calcination temperatureis 450-550 DEG C, and the calcination time is 1-2 h; 2) Zn(NO3)2.6H2O, InCl3.4H2O and C2H5NS dissolve in water to obtain mixed solutions, and the TiO2 nanotube array membranes prepared in the step 1)are immersed in the mixed solution; and the calcination is performed after sealing, so that ZnIn2S4 / TiO2 nanotube composite membranes are obtained. The ZnIn2S4 / TiO2 nanotube composite membranes prepared with the method have excellent photoelectric conversion performance.

Description

technical field [0001] The invention relates to a nanotube composite film photoanode for photogenerated cathodic protection, in particular to a kind of ZnIn used for photogenerated cathodic protection 2 S 4 / TiO 2 A method for preparing a nanotube composite film photoanode. Background technique [0002] With the continuous development of the marine economy, our demand for marine resources is increasing. In the field of marine engineering, metal materials are widely used. The metal materials used in offshore equipment are mainly steel, especially low-carbon steel and low-alloy steel, which are due to their wide source, cheap price, good mechanical properties, weldability and good machinability. However, steel suffers from severe corrosion in the marine environment, which directly affects the service life of marine facilities. Such as Q235 carbon steel and 304 stainless steel, containing Cl - Corrosion resistance in seawater is still poor. Therefore, the corrosion mechan...

Claims

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Application Information

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IPC IPC(8): C23F13/12C25D11/26C23C18/12C23C28/04
CPCC23C18/1204C23C28/042C23F13/12C25D11/26
Inventor 李红李延辉程联军
Owner QINGDAO UNIV
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