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Method for supporting nano titanic oxide on surface of carrier material

A technology of nano-titanium dioxide and carrier materials, applied in chemical instruments and methods, nanotechnology, nanotechnology, etc., can solve the problems of nanoparticle erosion and difficult control, and achieve the best performance effect

Inactive Publication Date: 2009-07-22
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is not easy to control and may cause some nanoparticles to be eroded away

Method used

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  • Method for supporting nano titanic oxide on surface of carrier material
  • Method for supporting nano titanic oxide on surface of carrier material

Examples

Experimental program
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Effect test

Embodiment 1

[0022](1) Carrier material preparation. Take glass as the carrier as needed, wash with water to remove the dust on the surface, and then soak in NaOH-Na 2 CO 3 Washing in the mixed solution, NaOH and Na in the mixed solution 2 CO 3 The mass concentration is 5% to wash away the surface oil, and finally wash with deionized water and dry for later use.

[0023] (2) Nano-TiO 2 Preparation of ethanol suspension. Take 0.5g nanometer TiO 2 The powder was mixed with 200ml of absolute ethanol, and ball milled at 450r / min for 15h in a ball mill to obtain nano-TiO with a concentration of 2.5g / L and uniform dispersion. 2 ethanol suspension.

[0024] (3) Adhesive coating. Immerse the treated glass carrier material in a silica sol solution with a concentration of 25wt%, and take it out after fully immersing; after the coating is completely dry, immerse it in a silica sol solution with a concentration of 5wt%, and take it out after fully immersing. After the coating is completely dr...

Embodiment 2

[0027] (1) Carrier material preparation. Take foamed nickel as the carrier as needed, wash with water to remove the dust on the surface, and then soak in NaOH-Na 2 CO 3 Washing in the mixed solution, NaOH and Na in the mixed solution 2 CO 3 The mass concentration of the silica sol is 5% to wash off the surface oil, and then soaked in a 5% HCl solution for 10 minutes to improve the wettability with the silica sol. Finally, it is washed with deionized water and dried for later use.

[0028] (2) Nano-TiO 2 Preparation of ethanol suspension. Take 0.5g nanometer TiO 2 The powder was mixed with 500ml of absolute ethanol, and ball milled at 500r / min for 12h in a ball mill to obtain nano-TiO with a concentration of 1g / L and uniform dispersion. 2 ethanol suspension.

[0029] (3) Adhesive coating. The treated foamed nickel carrier material is immersed in a silica sol solution with a concentration of 10 wt%, and taken out after fully immersing. After the coating is completely dr...

Embodiment 3

[0032] (1) Carrier material preparation. Take porous ceramics as the carrier as needed, wash with water to remove the dust on the surface, and then soak in NaOH-Na 2 CO 3 Washing in the mixed solution, NaOH and Na in the mixed solution 2 CO 3 The mass concentration is 5% to wash away the surface oil, and finally wash with deionized water and dry for later use.

[0033] (2) Nano-TiO 2 Preparation of ethanol suspension. Take 0.1g nanometer TiO 2 The powder was mixed with 200ml of absolute ethanol, and ball milled at 400r / min for 8h in a ball mill to obtain nano-TiO with a concentration of 0.5g / L and uniform dispersion. 2 ethanol suspension.

[0034] (3) Adhesive coating. Immerse the treated porous ceramic carrier material in a silica sol solution with a concentration of 5wt%, and take it out after fully soaking; after the coating is completely dry, immerse it in a silica sol solution with a concentration of 25wt%, and take it out after fully soaking. After the coating i...

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Abstract

The invention provides a method for loading nanometer titanium dioxide on the surface of a carrier material. The method is characterized in that: the carrier material is washed; by using a silicasol solution with the weight percentage of between 5 and 25 percent, a binder coating is prepared on the surface of the carrier; and the binder coating is sprayed with a nanometer TiO2 ethanol suspension, so that the nanometer TiO2 is loaded on the surface of the carrier material. Because the binder is coated first, and then the nanometer TiO2 material is adhered to the surface of the carrier, the nudity of the nanometer particle is ensured maximally. The coating of the binder and the adhesion of the photocatalyst are completed by different working procedures, the distribution condition of the binder on the carrier surface and the loading capacity of the catalyst can be adjusted more easily as required, so that the best performance is achieved.

Description

1. Technical field [0001] The invention relates to the field of air and water pollutant treatment, in particular to a method for loading photocatalytic nano titanium dioxide on the surface of a carrier material. 2. Background technology [0002] In recent years, with the rapid development of industrialization, the impact on the environment is also increasing, and the problem of environmental pollution has attracted more and more attention. The interior decoration of the living room and office has caused the excess of volatile organic harmful substances such as formaldehyde and benzene in the air, and the discharge of a large amount of industrial and civil wastewater has caused water pollution, which seriously threatens human health. [0003] Existing experimental studies have shown that it is difficult to remove organic harmful substances in indoor air by various conventional physical and chemical methods, but under the action of photocatalysis, nano-TiO 2 The representativ...

Claims

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Application Information

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IPC IPC(8): B01J21/06B01J37/02B82B3/00A61L9/18C02F1/30C02F101/30
Inventor 董寅生刘燕辉郭超盛晓波储成林林萍华
Owner SOUTHEAST UNIV
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