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Method for preparing BaTiO3/TiO2 nano-composite thin film material

A thin-film material and nano-composite technology, applied in metal material coating process, electrolytic coating, surface reaction electrolytic coating, etc., can solve the problems of long reaction cycle, coarse product grains, low energy utilization rate, etc., and achieve high heating rate Fast, uniform distribution, and excellent photogenerated cathodic protection performance

Inactive Publication Date: 2017-05-31
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Materials such as semiconductors and TiO are combined by hydrothermal method 2 Composite is a common method to prepare composite materials, but the traditional hydrothermal method to prepare BaTiO 3 / TiO 2 Composite materials require a long reaction cycle, low energy utilization rate, and relatively coarse product grains. Therefore, a new preparation technology is used to synthesize BaTiO 3 / TiO 2 Nanocomposite films are of great importance

Method used

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  • Method for preparing BaTiO3/TiO2 nano-composite thin film material
  • Method for preparing BaTiO3/TiO2 nano-composite thin film material
  • Method for preparing BaTiO3/TiO2 nano-composite thin film material

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Embodiment 1

[0028] a BaTiO 3 / TiO 2 The preparation method of nanocomposite film material, comprises the steps:

[0029] (1) Sample pretreatment: Ultrasonic cleaning the titanium foil with acetone, ethanol and deionized water for 10 minutes respectively, and immersing the cleaned titanium foil in the chemical polishing solution for polishing treatment for 30 seconds, wherein the volume ratio of each component of the chemical polishing solution for HF:HNO 3 :H 2 O=1:3:16, after polishing, blow dry with a hair dryer and dry at 60°C;

[0030] (2) Preparation of TiO on the surface of titanium foil by anodic oxidation 2 Nanotube: use platinum sheet as cathode, titanium foil as anode, anodize at 20V oxidation voltage for 0.5h; the distance between the two electrodes is 2cm, the temperature is room temperature, and the electrolyte is 0.5wt%NH 4 F, 40wt%H 2 Glycerol solution of O; after anodizing, wash the titanium foil with a large amount of deionized water to remove the residual electroly...

Embodiment 2

[0033] This embodiment prepares BaTiO 3 / TiO 2 The method of nanocomposite thin film material is roughly the same as embodiment 1, and difference is that step (3) microwave hydrothermal method prepares BaTiO 3 / TiO 2 Nanocomposite thin-film materials: utilizing CO removal 2 prepared Ba(OH) at a concentration of 0.05M with deionized water 2 Solution, by volume ratio is 40%, will Ba(OH) 2 The solution is poured into the reaction bottle of the microwave hydrothermal synthesizer, and then the obtained TiO2 grown in step (2) is added. 2 For the titanium foil of nanotubes, set the power of the microwave hydrothermal reaction instrument to 800W, the heating rate to 20°C / min, the reaction temperature to 120°C, and the holding time to 30min. After the reaction is complete and cooled to room temperature, the titanium foil is taken out and immersed in The concentration is 1M HCl solution for 1 min.

Embodiment 3

[0035] This embodiment prepares BaTiO 3 / TiO 2 The method of nanocomposite thin film material is roughly the same as embodiment 1, and difference is that step (3) microwave hydrothermal method prepares BaTiO 3 / TiO 2 Nanocomposite thin-film materials: utilizing CO removal 2 of deionized water to prepare Ba(OH) at a concentration of 0.1M 2 Solution, by volume ratio is 50%, will Ba(OH) 2 The solution is poured into the reaction bottle of the microwave hydrothermal synthesizer, and then the obtained TiO2 grown in step (2) is added. 2 For titanium foil of nanotubes, set the power of the microwave hydrothermal reaction instrument to 400W, the heating rate to 10°C / min, the reaction temperature to 150°C, and the holding time to 30min. After the reaction is complete and cooled to room temperature, the titanium foil is taken out and immersed in The concentration is 1M HCl solution for 1 min.

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Abstract

The invention belongs to the technical fields of nano-material preparation, photovoltaic conversion, as well as corrosion and protection, and particularly relates to a method for preparing a BaTiO3 / TiO2 nano-composite thin film material for photo-induced cathodic protection. The method comprises the following steps: (1) sample pretreatment; (2) preparation of a TiO2 nanotube on the surface of Ti foil by adopting an anodic oxidation method; and (3) preparation of the BaTiO3 / TiO2 nano-composite thin film material by adopting a microwave hydrothermal method. According to the method provided by the invention, the BaTiO3 / TiO2 nano-composite thin film material is prepared by adopting the microwave hydrothermal method; compared with a composite thin film material prepared by adopting a conventional hydrothermal method, the BaTiO3 / TiO2 nano-composite thin film material has the advantages of being high in heat energy utilization ratio, uniform in heating effect, high in heating rate, mild in reaction process, and the like; the high-purity, fine-grain and uniformly-distributed BaTiO3 / TiO2 nano-composite thin film material can be prepared at relatively low temperature within a relatively short time; and the prepared BaTiO3 / TiO2 nano-composite thin film material is applied to the field of photo-induced cathodic protection, and has the excellent photo-induced cathodic protection performance.

Description

technical field [0001] The invention belongs to the technical fields of nanomaterial preparation, photoelectric conversion, corrosion and protection, and specifically relates to a BaTiO 3 / TiO 2 Preparation method of nanocomposite film. Background technique [0002] In recent years, people have been inspired by the principle of photocatalysis and began to use some materials with photoelectric conversion function in the field of cathodic protection, resulting in a cathodic protection technology different from the traditional method - photogenerated cathodic protection technology. The traditional cathodic protection technology usually uses an external power supply or sacrificial anode to protect the cathode, while the photogenerated cathodic protection technology makes the corrosion potential of the protected metal negatively shifted by photoelectrons generated by light, thereby realizing cathodic protection. It is a non-destructive Protection technology saves resources and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23F13/12C25D11/26C23C26/00
CPCC23C26/00C23F13/12C25D11/26
Inventor 程旭东母事理
Owner WUHAN UNIV OF TECH
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