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Preparation method and application of nanometer titania thin film

A nano-titanium dioxide, thin film technology, applied in liquid chemical plating, metal material coating process, coating and other directions, can solve problems such as easy cracking and uneven film surface

Inactive Publication Date: 2018-07-27
ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the prior art, the sol-gel method uses titanium alkoxide as a precursor, absolute ethanol as a solvent, nitric acid or glacial acetic acid as an inhibitor, and deionized water as a catalyst. After hydrolysis and condensation reactions, a coating sol is generated, and then passed The sol is coated on the surface of the substrate by dipping or spin coating, and TiO is formed by heat treatment. 2 Thin films, with nano-TiO 2 The film surface is uneven and easy to crack

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  • Preparation method and application of nanometer titania thin film
  • Preparation method and application of nanometer titania thin film
  • Preparation method and application of nanometer titania thin film

Examples

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preparation example Construction

[0030] The invention provides a kind of preparation method of nano titanium dioxide film, comprises the following steps:

[0031] (1) The substrate is sequentially polished by sandpaper, cleaned with absolute ethanol and electropolished to obtain a pretreated substrate;

[0032] (2) The inhibitor is mixed with water and absolute ethanol to obtain an inhibitor solution, which is added dropwise to the absolute ethanol solution of titanium alkoxide, and then mixed with polyethylene glycol 2000 to obtain TiO 2 coating sol;

[0033] (3) the pretreatment substrate that described step (1) obtains is immersed in the TiO that described step (2) obtains 2 Pull coating in the coating sol to obtain nano-titanium dioxide film precursor;

[0034] (4) drying and annealing the nano-titanium dioxide film precursor obtained in the step (3) successively to obtain a nano-titanium dioxide film;

[0035] There is no time limit for steps (1) and (2).

[0036] In the invention, the substrate is p...

Embodiment 1

[0064] (1) Cut the aluminum alloy into a size of 10×10×3 mm by wire cutting. The surface is polished step by step with 200#, 400#, 600#, 800#, 1000# sandpaper until the surface scratches are basically in one direction, then ultrasonically cleaned with alcohol for 20 minutes, and dried for later use. A perchloric acid alcohol solution with a mass concentration of 20% was prepared, and the polished aluminum alloy was electrolytically polished using the perchloric acid alcohol solution. The electropolishing uses a 20V DC power supply, and the polishing time is 60s. After electropolishing, ultrasonically clean with deionized water and alcohol for 20 minutes respectively, and dry for later use.

[0065] (2) Measure 15 mL of tetrabutyl titanate, add 30 mL of absolute ethanol, record it as solution A, put it on a magnetic stirrer and stir for 30 min. Then measure 3mL of concentrated nitric acid and 4mL of deionized water, add them to 15mL of absolute ethanol, and record it as solut...

Embodiment 2

[0074] (1) Cut the aluminum alloy into a size of 10×10×3 mm by wire cutting. The surface is polished step by step with 200#, 400#, 600#, 800#, 1000# sandpaper until the surface scratches are basically in one direction, then ultrasonically cleaned with alcohol for 20 minutes, and dried for later use. A perchloric acid alcohol solution with a mass concentration of 20% was prepared, and the polished aluminum alloy was electrolytically polished using the perchloric acid alcohol solution. Electropolishing uses a 20V DC power supply, and the polishing time is 80s. After electropolishing, ultrasonically clean with deionized water and alcohol for 20 minutes respectively, and dry for later use.

[0075] (2) Measure 20 mL of tetrabutyl titanate, add 40 mL of absolute ethanol, record it as solution A, put it on a magnetic stirrer and stir for 40 min. Then measure 5mL of concentrated nitric acid and 6mL of deionized water, add them to 20mL of absolute ethanol, and record it as solution ...

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Abstract

The invention provides a preparation method of a nanometer titania thin film and belongs to the field of thin film preparation. The preparation method of the nanometer titania thin film includes the steps that a substrate is polished with abrasive paper, cleaned with absolute ethyl alcohol and electrolytically polished so as to obtain a preprocessed substrate; an inhibitor is mixed with water andabsolute ethyl alcohol to obtain an inhibitor solution, and the inhibitor solution is dropwise added into an absolute ethyl alcohol solution of titanium alkoxide and then mixed with polyethylene glycol 2000, so that TiO2 coating sol is obtained; the preprocessed substrate is immersed into the TiO2 coating sol to conduct lifting coating, and a nanometer titania thin film precursor is obtained; andthe nanometer titania thin film precursor is sequentially dried and annealed, and the nanometer titania thin film is obtained. By preprocessing the substrate and adding the polyethylene glycol 2000 asan additive, the surface appearance of the nanometer TiO2 thin film is improved, the obtained nanometer TiO2 thin film is smooth and flat, nanometer particles are uniform in size, surface coating isuniform and compact, and the corrosion resisting property of the thin film is effectively improved.

Description

technical field [0001] The invention relates to the technical field of nano-film preparation, in particular to a nano-titanium dioxide film and its preparation method and application. Background technique [0002] Nanomaterials refer to materials with at least one dimension on the nanometer scale (1-100nm) on the spatial scale, and they are located in the transition region between atomic clusters and macroscopic objects. It has a series of specific physical and chemical properties, including small size effect, surface effect, quantum size effect, macroscopic quantum tunneling effect and dielectric confinement effect, so it has great advantages in thermal, magnetic, optical, sensitive characteristics and surface stability. application potential. Nano-TiO 2 The thin film has good chemical stability, excellent photocatalytic properties and hydrophilicity, so that it presents great application potential in sewage treatment, air purification, electronic materials, optical mater...

Claims

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Application Information

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IPC IPC(8): C23C18/12
CPCC23C18/1216C23C18/1254C23C18/1291
Inventor 王玉江魏世丞梁义王亚子王博郭蕾黄玉炜黄威
Owner ARMOR ACADEMY OF CHINESE PEOPLES LIBERATION ARMY
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