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Process for producing codope titanium dioxide thin film of nitrogen and bismuth

A titanium dioxide, co-doping technology, applied in chemical instruments and methods, chemical/physical processes, devices for coating liquids on surfaces, etc. and other problems, to achieve the effect of easy adjustment, unique process, and easy control of content

Inactive Publication Date: 2010-12-15
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although TiO 2 The excited electron-hole pairs have a high oxidation ability, which makes it have good photocatalytic performance, but it also has some defects in practical applications: (1) TiO 2 Light absorption is limited to the ultraviolet region with shorter wavelength, and the absorption of sunlight is less than 5% of the solar spectrum irradiated on the ground, which limits the utilization of solar energy; (2) photogenerated carriers (h+, e- ) is easy to recombine, which reduces the photoelectric conversion efficiency, thus affecting the photocatalytic efficiency

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  • Process for producing codope titanium dioxide thin film of nitrogen and bismuth
  • Process for producing codope titanium dioxide thin film of nitrogen and bismuth

Examples

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Effect test

Embodiment 1

[0027] 0.5%N-0.5%Bi / TiO 2 Film preparation. The specific preparation process is as follows: dissolve 17ml of butyl titanate in 68ml of absolute ethanol, then add 4.8ml of diethanolamine, and stir on a constant temperature magnetic stirrer at room temperature for 30min to obtain solution A; take 0.009g of fluorinated Dissolve ammonium in 10ml of absolute ethanol, add solution A, and stir magnetically for 60 minutes to obtain solution B; take 0.122g of bismuth nitrate and 20ml of absolute ethanol, and add an appropriate amount of dilute nitric acid at the same time to promote the dissolution of bismuth nitrate in absolute ethanol and drop Add to solution B, stir magnetically for 60min to obtain solution C, then add a mixed solution of 0.9ml deionized water and 9ml absolute ethanol, stir magnetically for 60min to obtain nitrogen and bismuth co-doped TiO 2 Sol. In order to obtain a clean substrate, soak the substrate in potassium dichromate lotion for 10 hours, then ultrasonical...

Embodiment 2

[0029] 5%N-5%Bi / TiO 2 Film preparation. The specific preparation process is as follows: dissolve 17ml of butyl titanate in 68ml of absolute ethanol, then add 4.8ml of diethanolamine, and stir on a constant temperature magnetic stirrer at room temperature for 30min to obtain solution A; take 0.2ml of ammonia water to dissolve Add solution A to 10ml of absolute ethanol, stir magnetically for 60min to obtain solution B; take 1.126g of bismuth nitrate and 20ml of absolute ethanol, and add an appropriate amount of dilute nitric acid at the same time to promote the dissolution of bismuth nitrate in absolute ethanol and add dropwise to In solution B, stir magnetically for 60 minutes to obtain solution C, then add a mixed solution of 0.9ml of deionized water and 9ml of absolute ethanol, and stir magnetically for 60min to obtain nitrogen and bismuth co-doped TiO 2 Sol. In order to obtain a clean substrate, soak the substrate in potassium dichromate lotion for 10 hours, then ultrasoni...

Embodiment 3

[0031] 2%N-8%Bi / TiO 2 Film preparation. The specific preparation process is as follows: dissolve 17ml of butyl titanate in 68ml of absolute ethanol, then add 4.8ml of diethanolamine, and stir on a constant temperature magnetic stirrer at room temperature for 30min to obtain solution A; take 0.08ml of ammonia water to dissolve Add solution A to 10ml of absolute ethanol, stir magnetically for 60 minutes to obtain solution B; take 1.26g of bismuth chloride and 20ml of absolute ethanol, and add an appropriate amount of dilute hydrochloric acid at the same time to promote the dissolution of bismuth chloride in absolute ethanol and drop Add to solution B, stir magnetically for 60min to obtain solution C, then add a mixed solution of 0.9ml of deionized water and 9ml of absolute ethanol, stir magnetically for 60min to obtain nitrogen and bismuth co-doped TiO 2 Sol. In order to obtain a clean substrate, soak the substrate in potassium dichromate lotion for 10 hours, then ultrasonical...

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Abstract

The invention relates to a method for preparing nitrogen and bismuth codoping TiO2 membrane, which utilizes a sol-gel method to prepare nitrogen and bismuth codoping TiO2 solution sol, and then adopts a dip-coating method to prepare a precasting membrane with certain thickness on a base plate. The nitrogen and bismuth codoping TiO2 membrane is obtained after baking the precasting membrane under certain temperature. The invention is characterized by unique technique, convenient operation, easily controllable doping elements and adjustable performance; through doping metal trivalent ions bismuth and non-metal minus trivalent element nitrogen and doping cooperation between the nitrogen and the bismuth, the visible light responding functional materials of the high active TiO2 group is hopefully obtained, thus further widening the application field of the TiO2 nano materials. The preparation method of the invention can also provide a new idea for developing and applying other metal ions doping TiO2 or non-metal doping TiO2.

Description

technical field [0001] The invention belongs to the field of preparation and application of inorganic functional materials, and relates to the preparation of co-doped titanium dioxide thin films, in particular to a nitrogen and bismuth co-doped titanium dioxide (N-Bi / TiO 2 ) film preparation method. Background technique [0002] Titanium dioxide (TiO 2 ) is a new type of inorganic functional material, which exhibits physical and chemical properties such as excellent photocatalytic activity, photoelectric properties, thermal conductivity and chemical stability, and is widely used in solar cells, catalysts, sensors, cosmetics, functional ceramics, paints coatings, biomedicine, etc. With people's interest in TiO 2 With the continuous deepening of understanding, its application has also been continuously expanded. However, due to the powdery nano-TiO 2 The particles are fine, easy to condense in aqueous solution, not easy to settle, the catalyst is difficult to recover, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J21/06B01J23/18B01J27/24B05D7/24C03C17/23
Inventor 杨华明张向超唐爱东
Owner CENT SOUTH UNIV
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