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Photoanode of ionic liquid-modified semiconductor composite film and preparation method thereof

A technology of ionic liquids and semiconductors, applied in nanotechnology, coatings, nanotechnology, etc. for materials and surface science, can solve the problems of large inner diameter of nanomaterials, difficulty in mass production of samples, complicated preparation process, etc., and achieve protective effects Enhanced, good thermodynamic stability effect

Active Publication Date: 2022-03-08
INST OF OCEANOLOGY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But now some prepared TiO 2 There are certain defects in the methods, such as: template method, the inner diameter of the prepared nanomaterials is generally relatively large, and the shape will be limited by the shape of the template.
The preparation process is also relatively complicated, and it is not easy to achieve mass production of samples; the hydrothermal synthesis method has relatively high requirements for equipment, and requires a high-temperature resistant, high-pressure corrosion lining, which needs to be carried out in a closed container, which is not conducive to observing the growth process of the material. The safety performance is not very good, and the method is sensitive to external conditions such as temperature, so that the prepared TiO 2 The nanotube array is disordered and irregular, and the structure is relatively chaotic

Method used

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  • Photoanode of ionic liquid-modified semiconductor composite film and preparation method thereof
  • Photoanode of ionic liquid-modified semiconductor composite film and preparation method thereof
  • Photoanode of ionic liquid-modified semiconductor composite film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] 1. Take a flat and smooth rectangular pure titanium foil sample with a thickness of 0.3 mm, and ultrasonically clean it with acetone, absolute ethanol, and distilled water for 10 minutes.

[0022] 2. Weigh 1.72g of ammonium fluoride into 50g of distilled water, stir well, then add 450mL of ethylene glycol, stir for 3 hours to make ammonium fluoride solution. At room temperature, use the titanium foil substrate cleaned in the above step 1 as the anode, and the platinum sheet as the cathode, and anodize at a voltage of 60V for 1h in the above ammonium fluoride solution. Rinse with distilled water, sonicate in 0.1M hydrochloric acid solution for 30 minutes until the surface is smooth and bright, and dry to obtain the primary oxidized titanium foil substrate and dry it for use.

[0023] 3. At room temperature, with the primary oxidized titanium foil substrate as the anode and the platinum sheet as the cathode, anodize at a voltage of 60V for 1h in the above-mentioned ammoni...

Embodiment 2

[0027] 1. Take a flat and smooth rectangular pure titanium foil sample with a thickness of 0.3mm, and ultrasonically clean it with acetone, absolute ethanol, and distilled water for 5 minutes each.

[0028] 2. Weigh 0.172g of ammonium fluoride into 5g of distilled water, stir well, then add 45mL of ethylene glycol, stir for 3 hours to make ammonium fluoride solution. At room temperature, use the titanium foil substrate cleaned in the above step 1 as the anode, and the platinum sheet as the cathode, and anodize at a voltage of 75V for 2h in the above ammonium fluoride solution. Rinse with distilled water, sonicate in 0.1M hydrochloric acid solution for 45 minutes until the surface is smooth and bright, and dry to obtain the primary oxidized titanium foil substrate and dry it for use.

[0029] 3. At room temperature, with the primary oxidized titanium foil substrate as the anode and the platinum sheet as the cathode, anodize at a voltage of 60V for 1h in the above-mentioned ammo...

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Abstract

The invention relates to a modified semiconductor composite film, in particular to a photoanode of an ionic liquid modified semiconductor composite film (for 304 stainless steel) and a preparation method thereof. Specifically, the cleaned substrate is used as the anode to repeatedly oxidize in the ammonium fluoride solution to obtain TiO 2 nanoarray tubes, followed by TiO 2 Nanoarray tubes were immersed in TMGL solution for 2‑3h to obtain deposited TMGL@TiO 2 Membrane photoanode. The obtained photoanode of the present invention adopts semiconductor composite film modified by ionic liquid to carry out photogenerated cathodic protection for 304 stainless steel, so that it has good thermodynamic stability, designability and operability.

Description

technical field [0001] The invention relates to a modified semiconductor composite film, in particular to a photoanode of an ionic liquid modified semiconductor composite film (for 304 stainless steel) and a preparation method thereof. Background technique [0002] Titanium dioxide is an n-type semiconductor. When it is illuminated, the surface of titanium dioxide is enriched with electrons. If the electrons can be transferred to the surface of 304 stainless steel, it will have a cathodic protection effect on 304 stainless steel. Titanium dioxide semiconductor materials have the advantages of good chemical and thermodynamic stability, environmental friendliness, and no power consumption. cathodic protection and other fields. But now some prepared TiO 2 There are certain defects in the methods, such as: template method, the inner diameter of the prepared nanomaterials is generally relatively large, and the shape will be limited by the shape of the template. The preparation...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23F13/12C25D11/26B82Y30/00B82Y40/00
CPCC23F13/12C25D11/26B82Y30/00B82Y40/00
Inventor 马秀敏马峥侯保荣
Owner INST OF OCEANOLOGY - CHINESE ACAD OF SCI