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MgIn2S4/In2S3/TiO2 nano-composite membrane photo-anode material prepared through hydrothermal method and method thereof

A nanocomposite, mgin2s4 technology, applied in the field of nanocomposite film photoanode materials prepared by hydrothermal method, can solve the problems of low photon quantum efficiency and low light utilization rate

Active Publication Date: 2019-08-23
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its unique advantages, nano-TiO 2 It has been widely used in pollutant treatment, water treatment, solar cells and other fields. With the development of TiO 2 In-depth research, TiO 2 The application of photogenerated cathodic protection has also been extensively studied, but TiO 2 Due to the wide energy gap, it can only be excited when irradiated by ultraviolet light to generate photoelectrons, which leads to low light utilization efficiency; in addition, the recombination of photogenerated carriers and holes is also fast, resulting in low photon quantum efficiency. , these disadvantages limit the TiO 2 Practical application in the field of photogenerated cathode

Method used

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  • MgIn2S4/In2S3/TiO2 nano-composite membrane photo-anode material prepared through hydrothermal method and method thereof
  • MgIn2S4/In2S3/TiO2 nano-composite membrane photo-anode material prepared through hydrothermal method and method thereof
  • MgIn2S4/In2S3/TiO2 nano-composite membrane photo-anode material prepared through hydrothermal method and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Cut a commercially available titanium plate (purity: 99.9%) into a sample of 0.3mm×15mm×50mm, and use pure water and acetone to ultrasonically clean it several times, each time for 20 minutes, to remove inorganic or organic particles on the surface of the sample. Impurities, dry at room temperature for later use.

[0036] First, 0.9g ammonium fluoride (NH 4 F) Dissolve in 5mL pure water, then add 12mL hydrogen peroxide (H 2 o 2 ) and 12mL nitric acid (concentration of 65% HNO 3) and stir it evenly with a magnetic stirrer to obtain a polishing solution. Immerse the titanium plate sample in the polishing solution, and chemically polish until the surface of the sample is uniform, smooth and free of impurities. After taking it out, alternately ultrasonically clean it twice with pure water and absolute ethanol, each time for 10 minutes, to obtain a clean titanium plate sample. Finally, it was stored in absolute ethanol for future use.

[0037] Preparation of TiO on the...

Embodiment 2

[0048] Cut a commercially available titanium plate (purity: 99.9%) into a sample of 0.3mm×15mm×50mm, and use pure water and acetone to ultrasonically clean it several times, each time for 20 minutes, to remove inorganic or organic particles on the surface of the sample. Impurities, dry at room temperature for later use.

[0049] First, 0.9g ammonium fluoride (NH 4 F) Dissolve in 5mL pure water, then add 12mL hydrogen peroxide (H 2 o 2 ) and 12mL nitric acid (concentration of 65% HNO 3 ) and stir it evenly with a magnetic stirrer to obtain a polishing solution. Immerse the titanium plate sample in the polishing solution, and chemically polish until the surface of the sample is uniform, smooth and free of impurities. After taking it out, alternately ultrasonically clean it twice with pure water and absolute ethanol, each time for 10 minutes, to obtain a clean titanium plate sample. Finally, it was stored in absolute ethanol for future use.

[0050] Preparation of TiO on th...

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Abstract

The invention relates to a nano-composite membrane photo-anode material for photo-induced cathodic protection, and in particular relates to a hydrothermal method for preparing the nano-composite membrane photo-anode material (MgIn2S4 / In2S3 / TiO2 composite membrane photo-anode). The method comprises the following steps that a TiO2 nanotube array is modified under the action of a magnesium source, anindium source and a sulfur source by adopting the hydrothermal method, so that MgIn2S4 / In2S3 is loaded on the TiO2 nanotube array to form the MgIn2S4 / In2S3 / TiO2 nano-composite membrane photo-anode material. The obtained nano-composite membrane photo-anode material MgIn2S4 / In2S3 / TiO2 has a very good cathode protection effect on 316L stainless steel under visible light.

Description

technical field [0001] The invention relates to a nanocomposite film photoanode material for photogenerated cathodic protection, in particular to a nanocomposite film photoanode material (MgIn 2 S 4 / In 2 S 3 / TiO 2 Composite film photoanode) method. Background technique [0002] Corrosion is a common problem faced by the whole world. According to the survey, the global average corrosion loss value accounts for as high as 3.4% of the global gross national product (GNP). According to the statistics of the team of Academician Hou Baorong, the corrosion cost in my country in 2014 was about 212.78 billion yuan, accounting for about 3.34% of the GDP of that year. The marine environment is complex and harsh. The seawater has high salinity, high Cl- concentration, rich oxygen and a large number of microorganisms. In addition to the impact of waves and strong sunlight stimulation, the electrochemical corrosion of steel structures in the marine environment is particularly seriou...

Claims

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Application Information

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IPC IPC(8): C23F13/12C23C18/12C25D11/26
CPCC23C18/1204C23C18/1225C23F13/12C25D11/26
Inventor 王秀通南有博王文成徐慧杨黎晖段继周黄彦良
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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