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Preparation method and application of CO<2+>-doped titanium dioxide self-cleaning film

A titanium dioxide, self-cleaning technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve the problem of poor film formation and repeatability, and degradation The ability has not been significantly improved, the process technology is complicated, etc., to achieve the effect of reducing compounding, convenient operation, and simple process preparation

Inactive Publication Date: 2014-03-19
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But by doping metal ions to nano-TiO 2 The process of performance optimization is complex, high cost, poor film formation and repeatability, optimized nano-TiO 2 The ability of the film to catalyze the degradation of organic matter was not significantly improved compared with the TiO2 film

Method used

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  • Preparation method and application of CO&lt;2+&gt;-doped titanium dioxide self-cleaning film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) The analytically pure butyl phthalate (C 16 h 36 o 4 Ti) and analytically pure ethanol (C 2 h 5 OH) according to the volume ratio of 1:0.5 and mix evenly, then add analytically pure diethanolamine (C 4 h 11 NO 2 ), to obtain a transparent solution A; wherein, the volume content of diethanolamine in the transparent solution A is 3%;

[0026] 2) Deionized water, analytically pure acetylacetone (C 5 h 8 o 2 ) and analytically pure absolute ethanol were uniformly mixed at a volume ratio of 1:1:10 to obtain a transparent solution B;

[0027] 3) Slowly add transparent solution B into transparent solution A and keep stirring evenly to obtain a mixed solution; then add analytically pure cobalt acetate tetrahydrate (Co(CH 3 COO) 2 4H 2 O), and use analytically pure hydrochloric acid to adjust the pH value of the mixed solution to 2.0, and form a uniform sol after magnetic stirring for 5 hours; the uniform sol is aged at room temperature for 10 hours to obtain the ...

Embodiment 2

[0031] 1) The analytically pure butyl phthalate (C 16 h 36 o 4 Ti) and analytically pure ethanol (C 2 h 5 OH) according to the volume ratio of 1:1, and then add analytically pure diethanolamine (C 4 h 11 NO 2 ), to obtain a transparent solution A; wherein, the volume content of diethanolamine in the transparent solution A is 5%;

[0032] 2) Deionized water, analytically pure acetylacetone (C 5 h 8 o 2 ) and analytically pure absolute ethanol were mixed uniformly at a volume ratio of 1:2:15 to obtain a transparent solution B;

[0033] 3) Slowly add transparent solution B into transparent solution A and keep stirring evenly to obtain a mixed solution; then add analytically pure cobalt acetate tetrahydrate (Co(CH 3 COO) 2 4H 2 O), and use analytically pure hydrochloric acid to adjust the pH value of the mixed solution to 5.0, and form a homogeneous sol after magnetic stirring for 1 h; the homogeneous sol is aged at room temperature for 10 h to obtain the gel C require...

Embodiment 3

[0037] 1) The analytically pure butyl phthalate (C16 h 36 o 4 Ti) and analytically pure ethanol (C 2 h 5 OH) according to the volume ratio of 1:3 and mix evenly, then add analytically pure diethanolamine (C 4 h 11 NO 2 ), to obtain a transparent solution A; wherein, the volume content of diethanolamine in the transparent solution A is 6%;

[0038] 2) Deionized water, analytically pure acetylacetone (C 5 h 8 o 2 ) and analytically pure absolute ethanol were mixed uniformly at a volume ratio of 1:1:20 to obtain a transparent solution B;

[0039] 3) Slowly add transparent solution B into transparent solution A and keep stirring evenly to obtain a mixed solution; then add analytically pure cobalt acetate tetrahydrate (Co(CH 3 COO) 2 4H 2 O), and use analytically pure hydrochloric acid to adjust the pH value of the mixed solution to 4.0, and form a uniform sol after magnetic stirring for 5 hours; the uniform sol is aged at room temperature for 48 hours to obtain the gel ...

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Abstract

The invention relates to a preparation method and application of a CO<2+>-doped titanium dioxide self-cleaning film. The preparation method comprises the following steps: uniformly mixing dibutyl phthalate with absolute ethyl alcohol, and adding diethanol amine to prepare a transparent solution A; uniformly mixing deionized water, acetylacetone and absolute ethyl alcohol, so as to prepare a transparent solution B; adding cobalt acetate tetrahydrate into the obtained mixed solution, regulating the pH value of the mixed solution to 2.0-5.0, mixing to form uniform sol, and ageing to obtain gel C; soaking a cleaned substrate into the gel C, standing still and repeatedly lifting and coating till obtaining the film with the required thickness, and then sequentially drying and annealing, so as to obtain the CO<2+>-doped titanium dioxide self-cleaning film. The preparation method has the advantages that process devices are simple, the cost is low, the film-forming property and the repetitiveness are good, and the capacity of the prepared film for catalyzing the degradation of methyl orange under the sunlight radiation is obviously higher than that of a titanium dioxide film.

Description

technical field [0001] The invention relates to a preparation method and application of a titanium dioxide self-cleaning film, in particular to a Co 2+ Preparation method and application of doped titania self-cleaning thin 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, that is: nano-TiO under non-ultraviolet light conditions 2 No self-cleaning effect. In order to improve performance, many people pass in TiO 2 The method of doping other metal ions in nano-Ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J35/04C02F1/30
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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