Method for preparing samarium-doped titanium dioxide thin film

A technology of titanium dioxide and thin films, which is applied in the field of preparation of samarium-doped titanium dioxide thin films, can solve the problems of no self-cleaning effect and limited application range, etc., and achieve good film-forming properties, easy-to-obtain raw materials, and low reaction temperature Effect

Inactive Publication Date: 2011-09-07
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology

But nano TiO 2 It has super-hydrophilic, bactericidal, and organic decomposition effects only under ultraviolet light con

Method used

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  • Method for preparing samarium-doped titanium dioxide thin film

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Embodiment 1

[0013] Embodiment 1: 1) will analytically pure butyl phthalate (C 16 h 36 o 4 Ti) and analytically pure absolute ethanol (C 2 h 5 OH) in a volume ratio of 1:0.5 to make a mixed solution, add analytically pure diethanolamine (C 4 h 11 NO 2 ) make the volume content of diethanolamine reach 3%, and make transparent solution A;

[0014] 2) deionized water, analytically pure acetylacetone (C 5 h 8 o 2 ) and analytically pure absolute ethanol are mixed uniformly according to the volume ratio of 1:0.5:10 to obtain a transparent solution B;

[0015] 3) According to the volume ratio of solution A and solution B being 2.5:1, slowly add solution B into solution A and keep stirring, adjust with analytically pure hydrochloric acid to make the pH value of the mixed solution reach 2.0, and form a uniform sol after magnetic stirring for 5 hours; The sol was aged at room temperature for 10 hours to obtain the gel C required for coating;

[0016] 4) Put the substrate to be coated int...

Embodiment 2

[0019] Embodiment 2: 1) will analytically pure butyl phthalate (C 16 h 36 o 4 Ti) and analytically pure absolute ethanol (C 2 h 5 OH) in a volume ratio of 1:1 to make a mixed solution, add analytically pure diethanolamine (C 4 h 11 NO 2 ) make the volume content of diethanolamine reach 5%, and obtain transparent solution A;

[0020] 2) deionized water, analytically pure acetylacetone (C 5 h 8 o 2 ) and analytically pure dehydrated ethanol are mixed uniformly according to the volume ratio of 1:2:15 to obtain a transparent solution B;

[0021] 3) According to the volume ratio of solution A and solution B being 2.5:1, slowly add solution B into solution A and keep stirring, adjust with analytically pure hydrochloric acid to make the pH value of the mixed solution reach 5.0, and form a uniform sol after magnetic stirring for 1 hour; The sol was aged at room temperature for 32 hours to obtain the gel C required for coating;

[0022] 4) Put the substrate to be coated into...

Embodiment 3

[0025] Embodiment 3: 1) will analytically pure butyl phthalate (C 16 h 36 o 4 Ti) and analytically pure absolute ethanol (C 2 h 5 OH) was mixed uniformly at a volume ratio of 1:3 to make a mixed solution, and analytically pure diethanolamine (C 4 h 11 NO 2 ) make the volume content of diethanolamine reach 6%, and obtain transparent solution A;

[0026] 2) deionized water, analytically pure acetylacetone (C 5 h 8 o 2 ) and analytically pure dehydrated ethanol are mixed uniformly according to the volume ratio of 1:1:13 to obtain a transparent solution B;

[0027] 3) According to the volume ratio of solution A and solution B being 2.5:1, solution B was slowly added to solution A and stirred continuously, adjusted with analytically pure hydrochloric acid to make the pH value of the mixed solution reach 4.0, and a uniform sol was formed after magnetic stirring for 3 hours; The sol was aged at room temperature for 48 hours to obtain the gel C required for coating;

[0028...

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Abstract

The invention discloses a method for preparing a samarium-doped titanium dioxide thin film, which comprises: mixing butyl phthalate and absolute ethanol to obtain mixed solution, and adding diethanol amine into the mixed solution to obtain solution A; uniformly mixing deionized water, diacetone and absolute ethanol to obtain solution B; adding the solution B into the solution A, regulating the pH value to 2.0 to 5.0 by using hydrochloric acid, magnetically stirring and aging to obtain gel C; soaking a cleaned substrate into the gel C, standing, lifting, coating a film and drying; and annealing the dried thin film to obtain the samarium-doped titanium dioxide thin film. In the invention, the reaction temperature is low, the production efficiency is high, the raw materials are readily available, the operation is simple, the coated film is uniform and the repeatability is high. The organic degradation catalyzing capacity of the prepared thin film under irradiation by sunlight is much higher than that of titanium dioxide thin films. By controlling the doped amount of samarium, the thin film having much higher photocatalytic effect than titanium dioxide thin films can be prepared, and the rate of methyl orange decolorization catalyzed by the thin film reaches 10 to 70 percent.

Description

technical field [0001] The invention relates to a preparation method of a samarium-doped titanium dioxide film, which uses a sol-gel method (sol-gel) to coat a film on a glass substrate, and prepares samarium-doped anatase TiO through high-temperature treatment. 2 film. Background technique [0002] TiO 2 Nanomaterials have the functions of self-cleaning, decontamination, easy cleaning, and antibacterial. They have broad application prospects in protecting the public environment and creating a comfortable, clean and pollution-free living space. Its photocatalytic properties and super-hydrophilicity are praised by Japanese scholars. "The Light Cleaning Revolution". But nano TiO 2 It has super-hydrophilic, bactericidal, and organic decomposition effects only under ultraviolet light conditions, which limits its scope of use, namely: nano-TiO under non-ultraviolet light conditions 2 No self-cleaning effect. In order to improve performance, many people pass in TiO 2 The met...

Claims

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Application Information

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IPC IPC(8): B01J23/10C02F1/30
Inventor 卢靖黄剑锋曹丽云黄毅成曾先锋
Owner SHAANXI UNIV OF SCI & TECH
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