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Preparation method of foam glass-loaded titanium dioxide photocatalyst

A technology of foam glass and titanium dioxide, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of complex post-treatment process and degradation of photocatalytic performance, and achieve high dye adsorption capacity and low The effect of density and high stability

Inactive Publication Date: 2016-06-01
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for preparing a foam glass-supported titanium dioxide photocatalyst in view of the problems that the current nano-titanium dioxide powder is agglomerated in the process of printing and dyeing wastewater, resulting in a decrease in photocatalytic performance and a relatively complicated post-treatment process.

Method used

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  • Preparation method of foam glass-loaded titanium dioxide photocatalyst
  • Preparation method of foam glass-loaded titanium dioxide photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0024] 100 g of waste glass was put into a ball mill jar, and ball milled for 10 min at a rotation speed of 300 rpm to obtain a fine powder with a particle size of less than 75 μm. Then mix 100g of fine glass powder with 100g of water glass solution and stir evenly. Take a piece of open-cell PU foam with a size of 6cm×2.5cm×0.3cm and immerse it in the viscous mixture. After soaking for 5 minutes, take it out and dry it at 100°C for 2h, then calcinate the sample at 750°C for 1h. Obtain open-cell foam glass. All the open-cell foam glass was immersed in 3% titanium peroxide complex aqueous solution for 10 min, after which the sample was removed and dried at 100°C for 1 h. Finally, the sample was calcined at 500 °C for 1 h and cooled down to room temperature naturally to obtain the photocatalyst supported by open-cell foam glass. The density of the photocatalyst supported by open-cell foam glass is about 0.98g / cm 3 ,TiO 2 The loading is 6mgTiO 2 per gram of foam glass. The p...

Embodiment 2

[0026] After the organic dyes in the waste water of the foam glass-supported photocatalyst in Example 1 are fully degraded, the photocatalyst supported by the foam glass can be easily separated and the nano-titanium dioxide therein will not agglomerate. The photocatalyst supported on foam glass can recover its photocatalytic activity. After 10 repeated experiments, the concentration of methylene blue in the solution can still be reduced to 1.2 ppm after 10 h of ultraviolet light irradiation, which shows that the photocatalyst supported by foam glass has good stability.

Embodiment 3

[0028] Put 80g of waste glass and 20g of waste incineration bottom ash into a ball mill jar, and ball mill at a rotation speed of 300rpm for 15 minutes to obtain a fine powder with a particle size of less than 50 μm, then mix the fine powder with 100g of water glass solution and stir evenly. Take a piece of open-cell PU foam with a size of 6cm×2.5cm×0.3cm and immerse it in the viscous mixture. After soaking for 5 minutes, take it out and dry it at 100°C for 2 hours, then calcinate the sample at 750°C for 2 hours. Obtain open-cell foam glass. All the open-cell foam glass was immersed in 2% titanium peroxide complex aqueous solution for 10 min, and then the sample was removed and dried at 100°C for 1 h. Finally, the sample was calcined at 500 °C for 1 h and cooled down to room temperature naturally to obtain the photocatalyst supported by open-cell foam glass. The density of the photocatalyst supported by open-cell foam glass is about 0.95g / cm 3 ,TiO 2 The loading is 5mgTiO ...

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Abstract

The invention discloses a preparation method of a foam glass-loaded titanium dioxide photocatalyst, and relates to a photocatalyst. The preparation method comprises the steps that 1, ball milling is performed on solid waste to obtain solid waste powder; 2, water glass is mixed with the solid waste powder obtained in the step 1 to obtain a sticky mixture; 3, pored PU foam is soaked in the sticky mixture obtained in the step 2; 4, the infiltrated PU foam is taken out to be dried and calcined to obtain pored foam glass; 5, the foam glass obtained in the step 4 is soaked in an aqueous titanium peroxide complex solution to enable a titanium peroxide complex to be adsorbed to the foam glass; 6, the foam glass adsorbed with the titanium peroxide complex is taken out to be dried and calcined, and then the foam glass-loaded titanium dioxide photocatalyst is obtained. The prepared foam glass-loaded titanium dioxide photocatalyst has the advantages of being low in density, high in dye adsorption capacity, photocatalytic efficiency and stability and the like and can effectively degrade organic matter in printing and dyeing wastewater.

Description

technical field [0001] The invention relates to a photocatalyst, in particular to a method for preparing a foam glass-loaded titanium dioxide photocatalyst. Background technique [0002] The printing and dyeing industry is a large discharge of industrial wastewater. According to incomplete statistics, the daily discharge of printing and dyeing wastewater in the country is 3×10 6 ~4×10 6 m 3 . Printing and dyeing wastewater has the characteristics of large water volume, high content of organic pollutants, deep color, high alkalinity, and large changes in water quality. It is a difficult-to-treat industrial wastewater. Nano-titanium dioxide can photocatalytically degrade organic matter, and has the advantages of low price, non-toxicity and stable chemical properties, so it is widely used in the research of degrading printing and dyeing wastewater (T.Kawahara, Y.Konishi, H.Tada, N.Tohge, J . Nishii, S. Ito, Angew. Chem. Int. Ed. 41 (2002) 2811). Nano-titanium dioxide powde...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/08B01J21/06
CPCB01J21/063B01J21/08B01J35/39
Inventor 许清池徐俊谢水奋
Owner XIAMEN UNIV
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