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Method for preparing titanic oxide nano-membrane on aluminum base

A technology of titanium dioxide and nano-titanium dioxide is applied in the field of nano-film to achieve the effects of high cost, cost saving and low temperature range

Inactive Publication Date: 2008-11-19
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it does not involve nano-membranes with photocatalytic degradation effects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) Preparation of titanium dioxide sol: take by weighing P25 (trade name of German Degussa company product, commercially available) mixed crystal nanometer titanium dioxide powder (accounting for 80% of anatase type, 20% of rutile type) 50g, adding molecular weight is 6000 Polyethylene glycol 5g, mixture A was obtained. Add 250 g of absolute ethanol to mixture A, stir and mix to obtain mixture B, then slowly add 700 g of distilled water to mixture B, stir for 15 minutes and mix to obtain mixture C. In mixture C, add 7.0 g of 10% dilute nitric acid solution, stir for 15 minutes and mix uniformly to obtain mixture D. Put the mixture D under the ultrasonic generator and disperse for about 30 minutes to form a titanium dioxide sol.

[0016] 2) Carrier pretreatment: take the honeycomb aluminum base carrier, wash the surface with dilute acid and dilute alkali for 5 minutes, rinse with distilled water repeatedly, dry at 90-100°C, and set aside.

[0017] 3) Carrier coating: i...

Embodiment 2

[0020]1) Preparation of titanium dioxide sol: Weigh 50 g of mixed crystal nano titanium dioxide powder of P25 (trade name of German Degussa company, commercially available), and add 8 g of polyethylene glycol with a molecular weight of 6000 to obtain mixture A. Add 220 g of absolute ethanol to mixture A, stir and mix to obtain mixture B, then slowly add 650 g of distilled water to mixture B, stir for 15 minutes and mix to obtain mixture C. In mixture C, add 6.50 g of 10% dilute nitric acid solution to adjust the acidity, stir for 15 minutes and mix uniformly to obtain mixture D. Put the mixture D under the ultrasonic generator and disperse for about 30 minutes to form a titanium dioxide sol.

[0021] 2) Carrier pretreatment: take the honeycomb aluminum base carrier, wash the surface with dilute acid and dilute alkali for 5 minutes, rinse with distilled water repeatedly, dry at 80-90°C, and set aside.

[0022] 3) Carrier coating: immerse the pretreated aluminum honeycomb carri...

Embodiment 3

[0025] 1) Preparation of titanium dioxide sol: same as in Example 2.

[0026] 2) Carrier pretreatment: Take the honeycomb ceramic carrier, wash the surface with dilute alkali for 2 minutes, rinse it repeatedly with distilled water, dry it at 90-95°C, and set it aside.

[0027] 3) carrier coating: same as embodiment 2.

[0028] It was determined that the prepared photocatalytic degradation film of honeycomb ceramics still maintained the original mixed crystal ratio of rutile type and anatase type of P25. According to related methods, its ability to catalyze the degradation of formaldehyde is more than 70%.

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PUM

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Abstract

The invention discloses a method used for preparing a titanium dioxide nanometer film on an aluminum matrix, and relates to a nanometer film. The invention provides a method used for preparing the titanium dioxide nanometer film on the aluminum matrix. Polyethylene glycol is added into complex crystal nanosize titanium dioxide powder to obtain a mixture A, the ratio of the complex crystal nanosize titanium dioxide powder to the polyethylene glycol is equal to 10-4:1, anhydrous ethanol is added in the mixture A, the ratio of the mixture A to the anhydrous ethanol is equal to 1:4-5, and a mixture B is obtained by uniformly mixing; then water is added into the mixture B, the ratio of the mixture B to the water is equal to 1:3-4, and a mixture C is obtained by uniformly mixing; acid is added into the mixture C for adjusting the pH value to be 3-5, and a mixture D is obtained by uniformly mixing; the mixture D is uniformly dispersed under ultrasonic to obtain titania sol; after the surface is processed by acid or alkali, the aluminum matrix is washed and dried for later use; the pretreated aluminum matrix is dipped and coated with a film in the titania sol, the pore solution is spin-dried after the film is taken out, and finally the titanium dioxide nanometer film is prepared on the aluminum matrix by calcining after drying.

Description

technical field [0001] The invention relates to a nano film, in particular to a titanium dioxide (TiO 2 ) nanomembrane method. Background technique [0002] Nano-titanium dioxide has high photocatalytic efficiency, can effectively degrade volatile organic pollutants (VOCs), and also has functions such as sterilization, disinfection, and deodorization ([1] SaxenaA, Sahai Y. Modeling of Fluid Flow and Heat Transfer in Twin 2 Roll Casting of Aluminum Alloys[J].The Japan Institute of Metals, 2002, 43(2):206-213; [2]Haga T, Suzuki S.A High Speed ​​Twin Roll Caster for Aluminum Alloy Strip[J].Journal ofMaterials Processing Technology, 2001, 113: 291-2). Supported nano-titanium dioxide thin film photocatalytic technology overcomes the shortcomings of powdered titanium dioxide catalysts that are not easy to recycle, and has strong practicability, so it has become a hot spot in photocatalytic research ([3] Bahnemann D W, Kholuiskaya S N, Dillert R, et al.Pho 2 todestruction of dic...

Claims

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Application Information

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IPC IPC(8): B01J21/06B05D7/14
Inventor 胡宏友李雄
Owner XIAMEN UNIV
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