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Method of taking normal titanic acid as raw material to prepare nano titanium dioxide slurry for photocatalysis

A nano-titanium dioxide, ortho-titanic acid technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve problems such as high cost, cumbersome process, environmental impact, etc., and achieve low production cost and process. The effect of short process and short production cycle

Pending Publication Date: 2018-12-04
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cost of the process is high and the process is cumbersome; the acid added is nitric acid, which has a certain impact on the environment

Method used

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  • Method of taking normal titanic acid as raw material to prepare nano titanium dioxide slurry for photocatalysis
  • Method of taking normal titanic acid as raw material to prepare nano titanium dioxide slurry for photocatalysis
  • Method of taking normal titanic acid as raw material to prepare nano titanium dioxide slurry for photocatalysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A. Weigh 9.08g of orthotitanic acid with a solid content of 16.07% and a pH value of about 8, and prepare it into a white suspension of 0.1mol / L;

[0043] B. At room temperature, press Ti 4+ with H 2 o 2 Pour hydrogen peroxide into the white suspension in step A with a molar ratio of 1:11 and keep stirring;

[0044] C. After pouring into hydrogen peroxide for 10 minutes, the solution gradually became clear and transparent. After continuing to stir for 1 hour, let it stand for 12 hours to obtain clear and transparent peroxytitanic acid with a pH value of 7;

[0045] D. Hydrothermally react the peroxotitanic acid in step C at a temperature of 120° C. for 14 hours. After the reaction is completed, rinse with water, cool to room temperature, and take out the solution to obtain a light blue nano-titanium dioxide slurry; through XRD analysis, its crystal Anatase TiO 2 ; The antibacterial performance reaches 99.9%, reaching the I level of the GB / T 21866-2008 standard, and ...

Embodiment 2

[0052] A. Weigh 10.92g of orthotitanic acid with a solid content of 16.07% and a pH value of about 8, and prepare it into a white suspension of 0.1mol / L;

[0053] B. At room temperature, press Ti 4+ with H 2 o 2 Pour hydrogen peroxide into the white suspension in step A with a molar ratio of 1:8 and keep stirring;

[0054] C. After pouring hydrogen peroxide for 15 minutes, the solution gradually became clear and transparent. After continuing to stir for 1 hour, let it stand for 24 hours to obtain clear and transparent peroxotitanic acid with a pH value of 7;

[0055] D. Hydrothermally react the peroxotitanic acid in step C at a temperature of 120°C for 14 hours. After the reaction is completed, rinse with water, cool to room temperature, and take out the solution to obtain a light blue nano-titanium dioxide slurry. After XRD analysis, its crystal Anatase TiO 2 .

[0056] Photocatalytic performance test:

[0057] Weigh 1g of methyl orange powder, dissolve it in 1000mL of ...

Embodiment 3

[0062] A. Weigh 12.60g of orthotitanic acid with a solid content of 16.98% and a pH value of about 8, and prepare it into a white suspension of 0.2mol / L;

[0063] B. At room temperature, press Ti 4+ with H 2 o 2 Pour hydrogen peroxide into the white suspension in step A with a molar ratio of 1:11 and keep stirring;

[0064] C. After pouring hydrogen peroxide for 15 minutes, the solution gradually became clear and transparent. After continuing to stir for 1 hour, let it stand for 24 hours to obtain clear and transparent peroxotitanic acid with a pH value of 7;

[0065] D. Hydrothermally react the peroxotitanic acid in step C at a temperature of 120°C for 14 hours. After the reaction is completed, rinse with water, cool to room temperature, and take out the solution to obtain a blue-white nano-titanium dioxide slurry. After XRD analysis, its crystal form Anatase TiO 2 .

[0066] Photocatalytic performance test:

[0067] Weigh 1g of methyl orange powder, dissolve it in 1000...

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Abstract

The invention discloses a method of taking normal titanic acid as the raw material to prepare nano titanium dioxide slurry for photocatalysis, and belongs to the technical field of catalytic nano materials. In order to simplify the preparation process of nano titanium dioxide slurry, reduce the cost, and guarantee the excellent performance of the product, provided is a preparation method that takes normal titanic acid as the raw material to prepare nano titanium dioxide slurry for photocatalysis. According to the preparation method, normal titanic acid is made into suspension (<=0.2 mol / L); hydrogen peroxide is added into the suspension at a time under continuous stirring; after the solution becomes clear, the solution is stirred, then the solution is allowed to stand still to obtain peroxo titanic acid (PTA), and after hydrothermal reactions of PTA, the reaction product is cooled to obtain nano titanium dioxide slurry. The preparation method has the advantages of short technical process, low cost, energy saving, and environmental friendliness, and the product has excellent properties and wide application range.

Description

technical field [0001] The invention belongs to the field of catalytic nanomaterials, and in particular relates to a method for preparing nano titanium dioxide slurry for photocatalysis by using orthotitanic acid as a raw material. Background technique [0002] Nano-titanium dioxide is currently the most widely used nanomaterial. Nano-titanium dioxide has the characteristics of large specific surface area, low melting point, strong magnetism, good light absorption performance, chemical corrosion resistance, and harmless to the human body. It is widely used in cosmetics, advanced coatings, catalysts, fine ceramics, advanced paints, UV shielding, and semiconductors. materials etc. The photogenerated electron holes of nano-titanium dioxide can directly biochemically react with the cell wall or internal components of bacteria to inactivate bacteria. It is a good antibacterial material. The common crystal forms of nano titanium dioxide are anatase, rutile and brookite. At pres...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06C02F1/30C02F101/30
CPCC02F1/30B01J21/063C02F2101/30B01J35/39
Inventor 罗金华张树立李桂芳倪伟
Owner PANZHIHUA UNIV