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Preparation method of laser modified titanium dioxide photocatalyst

A technology of titanium dioxide and photocatalyst, which is applied in the field of environmental pollution control and new energy research, can solve the problems of low photocatalytic quantum efficiency, aggravate environmental pollution, cumbersome and complicated process, etc., and achieve large specific surface area, good stability and simple method Effect

Inactive Publication Date: 2009-03-25
DONGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The only weakness of titanium dioxide is that it cannot be used for visible light, and the photocatalytic quantum efficiency is low, which restricts the practical application of titanium dioxide photocatalysis
[0011] These methods all add a certain amount of metal, semiconductor material or oxidant during the preparation or use of titanium dioxide photocatalyst, which increases the cost of preparation and use of titanium dioxide photocatalyst, and the process is more cumbersome and complicated, which increases environmental pollution.

Method used

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  • Preparation method of laser modified titanium dioxide photocatalyst

Examples

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Comparison scheme
Effect test

Embodiment 1

[0028] A preparation method of laser modified titanium dioxide photocatalyst, the specific steps are:

[0029] Step 1: Treat the surface of the porous polyester fiber web at 60°C for 20 minutes with a solution containing 0.3g / l acetic acid, 0.05g / l Ping Pingjia, 0.2g / l Tween 20, and 0.3g / l detergent, add 0.4 Neutralize with g / L baking soda, wash with water, apply 10g / l polyester fiber protective agent solution on the porous polyester fiber mesh with a coating thickness of 0.15mm, dry at 60°C for 10 minutes, and cool naturally. The solvent of the agent solution is ethanol and water with a mass ratio of 10:1;

[0030] The second step: Slowly add isobutanol to tetraisopropyl titanate dropwise, add inhibitor acetylacetone and catalyst 1.5g / l sulfuric acid, stir for 30min, add deionized water for hydrolysis reaction, add silver nitrate and three Ferric chloride is calcined at 300°C to obtain nano-titanium dioxide powder; wherein, the mass ratio of isobutanol, tetraisopropyl titana...

Embodiment 2

[0037] A preparation method of laser modified titanium dioxide photocatalyst, the specific steps are:

[0038]Step 1: Treat the surface of the porous polyester fiber web with a solution containing 0.5g / l acetic acid, 0.15g / l Ping Pingjia, 0.4g / l Tween 20, and 0.5g / l detergent at 70°C for 40 minutes, add 0.6 Neutralize with g / L baking soda, wash with water, apply 6g / l polyester fiber protective agent solution on the porous polyester fiber mesh with a coating thickness of 0.05mm, dry at 90°C for 20 minutes, and cool naturally. The solvent of the agent solution is ethanol and water with a mass ratio of 5:1;

[0039] The second step: Slowly add isobutanol to tetraisopropyl titanate dropwise, add inhibitor acetylacetone and catalyst 0.8g / l sulfuric acid, stir for 50min, add deionized water for hydrolysis reaction, add silver nitrate and three Ferric chloride is calcined at 400°C to obtain nano titanium dioxide powder; wherein, the mass ratio of isobutanol, tetraisopropyl titanate,...

Embodiment 3

[0046] A preparation method of laser modified titanium dioxide photocatalyst, the specific steps are:

[0047] Step 1: Treat the surface of the porous polyester fiber web with a solution containing 0.4g / l acetic acid, 0.1g / l Ping Pingjia, 0.3g / l Tween 20, and 0.4g / l detergent at 65°C for 30min, add 0.5 Neutralize with g / L baking soda, wash with water, apply 8g / l polyester fiber protective agent solution on the porous polyester fiber mesh with a coating thickness of 0.1mm, dry at 75°C for 15 minutes, and cool naturally. The solvent of the solvent solution is ethanol and water with a mass ratio of 7.5:1;

[0048] The second step: Slowly add isobutanol to tetraisopropyl titanate dropwise, add inhibitor acetylacetone and catalyst 1.15g / l sulfuric acid, stir for 40min, add deionized water for hydrolysis reaction, add silver nitrate and three Ferric chloride is calcined at 350°C to obtain nano-titanium dioxide powder; wherein, the mass ratio of isobutanol, tetraisopropyl titanate, ...

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Abstract

The invention discloses a preparation method of a laser modified titanium dioxide photocatalyst, which belongs to the technique field of environmental pollution treatment and the research field of new energy sources, and the method comprises the following steps: 1) surface treatment of a high-strength and high-elasticity porous polyester fiber net; 2) loading the titanium dioxide photocatalyst; and 3) modification of a titanium dioxide film by laser. The method is to sequentially carry out the protective sorting to the polyester fiber net according to the cleaned fiber net surface, then coat a film on the fiber net surface by using a sol-gel-coating method and taking tetra-iso-propyl titanate and isobutyl alcohol as raw materials under the weak base condition, and modify the film in a textile laser processor. The invention has advantages of extensive sources of raw materials, simple process, low cost, good stability of the prepared titanium dioxide film, and high photo-catalytic activity and efficiency, and has the antifouling, self-cleaning, antibacterial and air-cleaning effects, and the method can be used for the degradation of environmental harmful substance, and can serve as air purification material and dyeing wastewater treatment photocatalysis material.

Description

technical field [0001] The invention relates to a method for preparing a laser-modified titanium dioxide photocatalyst, which belongs to the technical fields of environmental pollution control and new energy research. Background technique [0002] Nano-titanium dioxide photocatalysis technology is a new technology for pollution prevention and control developed in recent decades. It has the advantages of high efficiency and energy saving, clean and non-toxic, no secondary pollution and process simplification. It is expected to become an ideal technology for environmental pollution control and treatment in the 21st century. . The only weakness of titanium dioxide is that it cannot be used for visible light, and the photocatalytic quantum efficiency is low, which restricts the practical application of titanium dioxide photocatalysis. Photocatalytic materials represented by titanium dioxide and their modification and modification have become a research hotspot in recent years. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/06B01J35/02B01J31/06
Inventor 何瑾馨刘保江程绪邦刘路高品田佳赵强强郝绍芳
Owner DONGHUA UNIV
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