Titanium dioxide colloidal sols for preparing wide spectrum photocatalytic material and preparation thereof

A titanium dioxide, catalytic material technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., to achieve the effect of high photocatalytic reaction activity

Inactive Publication Date: 2008-07-02
田鸿彬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it can only achieve photocatalysis under ultraviolet light

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1) Take 200 mL of tetraisopropanol titanate with a concentration of 90%, put it into a 1 L container, and dilute it to 500 mL with isopropanol (chemically pure 90%). Add 100 mL of 10% hydrochloric acid aqueous solution slowly, and stir at 200 rpm with an electric stirrer. Afterwards, the pH value of the above mixed solution was adjusted to about 6.5 with 30% ammonia solution, and stirred for 5 minutes to prepare the sol A solution for use.

[0019] 2) Take 20 mL of palladium chloride solution with a concentration of 10%, dilute it to 50 mL with deionized water, slowly add it into the container containing the Sol A solution, and keep stirring. Then use 30% ammonia solution to adjust the mixed pH value to about 7, and continue to stir rapidly to prepare liquid C, which is the sol of the present invention. The titanium content in the sol is 12% (based on titanium dioxide content), and the palladium content is 0.16%.

[0020] Take the above-mentioned sol, stir it well and...

Embodiment 2

[0022] 1) Take 500 mL of tetraisopropanol titanate with a concentration of 90%, put it into a 10 L large-mouth container, and dilute it to 5 L with isopropanol (chemically pure 90%). Add 500 L of 10% aqueous hydrochloric acid solution slowly, and stir at 200 rpm with an electric stirrer. Afterwards, the pH value of the above mixed solution was adjusted to about 6.5 with 30% ammonia solution, and stirred for 5 minutes to prepare the sol A solution for use.

[0023] 2) Take 50 mL of vanadium oxalate solution with a concentration of 40%, dilute it to 500 mL with deionized water, slowly add it into the container containing the Sol A solution, and keep stirring. Then use 30% ammonia solution to adjust the mixed pH value to about 7, and continue to stir rapidly to prepare liquid C, which is the sol of the present invention. The titanium content in the sol is 3.0% (based on titanium dioxide content), and the vanadium content is 0.1%.

[0024] Take 500mL of the above-mentioned sol, ...

Embodiment 3

[0026] 1) Take 100mL of titanium tetrachloride with a concentration of 95%, put it into a 2L three-necked flask, slowly add 500mL of isopropanol (90% chemically pure) to the flask, and titanium tetrachloride is formed by reacting with isopropanol Tetraisopropanol titanate, while releasing hydrogen chloride gas (need to be purified and absorbed with lye).

[0027] 2) Dilute the tetraisopropoxide titanate formed by the above reaction to 1 L with isopropanol. Add 100 mL of 10% hydrochloric acid aqueous solution slowly, and stir at 200 rpm with an electric stirrer. Afterwards, the pH value of the above mixed solution was adjusted to about 6.5 with 30% ammonia solution, and stirred for 5 minutes to prepare the sol A solution for use.

[0028] 3) Take 10 mL of tungsten nitrate solution with a concentration of 10%, dilute it to 100 mL with deionized water, slowly add it into the container containing the Sol A solution, and keep stirring. Then use 30% ammonia solution to adjust the ...

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Abstract

The invention discloses and relates to a titanium dioxide collosol used for preparing wide-spectrum photocatalytic materials and a preparation method thereof. The titanium dioxide collosol comprises organic or inorganic titanium compounds and solvents, as well as soluble nitrates or organic salts of modified metallic ions used for blending, and the modified metallic ions used for blending are palladium, iron, tungsten, silver, vanadium, iron, cadmium or zirconium; wherein, weight of the organic or inorganic titanium compounds occupies 1 to 30 percent of total weight after being translated to weight of the titanium dioxide; and after weight of the soluble nitrate or the organic salt of the modified metallic ions used for blending is translated to weight of the metallic oxide, the proportion between the soluble nitrate or the organic salt of the modified metallic ions and the titanium dioxide is between 0.01 to 1 and 0.2 to 1 by weight. The invention adopts proper chemical substances and processing methods for modifying the titanium dioxide catalyst, and leads the processed catalyst to have higher liveness in photocatalyst reactions can implement the photocatalytic reactions by using ultraviolet lights with larger wavelength or even natural daylights.

Description

technical field [0001] The invention belongs to antibacterial and photocatalytic materials and a preparation method thereof, in particular to a titanium dioxide sol which can be used for preparing broad-spectrum photocatalytic materials and a preparation method thereof. Background technique [0002] With the development of industry and agriculture and the expansion of urban population, the problem of odorous gas pollution has become increasingly prominent, which has seriously affected people's quality of life and can directly endanger human health. In terms of sources of urban odor, the collection and treatment of municipal sewage is the main cause of odor emission, among which the emission of odor from sewage pumping stations and sewage treatment plants is the most serious. In addition, a large amount of malodorous gas will be released in places such as municipal solid waste and feces collection and transfer, which will seriously damage the surrounding environmental quality...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06A61L9/22A61L101/02
Inventor 晏乃强王长勇金晓月田鸿彬
Owner 田鸿彬
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