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Load type Pt/TiO2/Al2O3 fiber composite photocatalyst and preparation method thereof

A fiber composite and photocatalyst technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of poor stability between catalyst and carrier, reduced catalyst activity, complicated preparation process, etc. The method is simple and efficient, with high catalytic activity and good stability

Inactive Publication Date: 2012-12-19
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the activity of the catalyst decreases due to the change of the specific surface during the loading process, the stability of the combination of the catalyst and the carrier is poor, and it is easy to fall off, and some preparation processes are very complicated and expensive

Method used

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  • Load type Pt/TiO2/Al2O3 fiber composite photocatalyst and preparation method thereof
  • Load type Pt/TiO2/Al2O3 fiber composite photocatalyst and preparation method thereof
  • Load type Pt/TiO2/Al2O3 fiber composite photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Example 1: The low-temperature sol-gel preparation method of anatase nano-titanium dioxide, please refer to the document Sifang Li, * Guoliang Ye, and Guoqin Chen. J. Phys. Chem. C 2009, 113, 4031, specifically: 10g of titanium The butyl acid was dissolved in 40ml of anhydrous ether, then 12ml of glacial acetic acid was added to it, and it was fully stirred for 1 hour. Add a mixed solution of glacial acetic acid and water (10ml water, 5ml glacial acetic acid) dropwise, and stir thoroughly for 1 to 3 hours. Seal the resulting white gel and let it stand for 1~3 days, remove the supernatant, and place the lower gel at 120 0 C dry, cool and grind into powder. Wash repeatedly with deionized water and centrifuge until the product becomes neutral. Put the product at 100~120 0 C Dry, grind into powder, then put the powder in a crucible, 400~500 in air atmosphere 0 C is calcined for 1 to 3 hours. Finally, the white powder anatase type nano titanium dioxide catalyst A is obtaine...

Embodiment 2

[0023] Example 2: Add 1.30ml 0.01mol / L of H to 0.5g of anatase nano titanium dioxide powder A obtained in Example 1. 2 PtCl 6 Aqueous solution, then add 250ml (V Methanol / V water =1:10) Methanol aqueous solution, adjust the pH value of the solution to about 6.8~7.0 with NaOH aqueous solution. After stirring, use 300W xenon lamp light for 3~5 hours. After exposure to light, the compound was obtained by centrifugation and washing with water. After centrifugation, the product is at 100~120 0 C dry, cool and grind to obtain gray-black powder. In the air atmosphere, 400~500 0 C is calcined for 2~4 hours. Obtain gray-black 0.5wt% Pt / TiO 2 Powder catalyst B. See attached figure 2 .

Embodiment 3

[0024] Example 3: Commercially purchased Al 2 O 3 The fiber is ultrasonically washed 3~5 times with ethanol and dried. In an air atmosphere, 200~300 0 C heat treatment for 3~5 hours. Take 20mg of 0.5wt% Pt / TiO obtained in Example 2 2 Powder B is dispersed in the aqueous solution and ultrasonicated for 5-15 minutes. Will Al 2 O 3 200mg of fiber immersed in the solution to make the powder B Uniformly adsorbed on Al 2 O 3 Fiber surface. After drying, in an air atmosphere, 200~300 0 C heat treatment for 2~3 hours to obtain supported Pt / TiO 2 / Al 2 O 3 Fiber optic composite catalyst C . See attached image 3 .

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Abstract

The invention relates to a load type Pt / TiO2 / Al2O3 fiber composite photocatalyst and a preparation method thereof. The catalyst is the composite photocatalyst which takes Al2O3 fiber as a carrier and is formed by loading Pt / TiO2 on the carrier, wherein the mass of the Pt / TiO2 is 10% of that of the Al2O3 fiber; and the mass ratio of the Pt to TiO2 in the Pt / TiO2 is 5:1000. The catalytic activity of the load type photocatalyst is close to that of a photocatalyst dispersed in a solution, and the load type photocatalyst has high catalytic activity and good stability and is reusable. The Al2O3 fiber is light per se, easy to suspend in water and convenient for recycling. The preparation method is simple and highly effective, can be used for large-scale preparation, and has lower cost and practical significance in the application field of treating pollutants with water.

Description

technical field [0001] The invention relates to a nano photocatalyst functional material and a preparation method thereof, in particular to a supported Pt / TiO 2 / Al 2 o 3 Fiber composite photocatalyst and preparation method thereof. technical background [0002] In the past 30 years, my country has been in a period of rapid industrialization, and the country's comprehensive national strength and people's living standards have been continuously improved, but the ecological environment has been severely damaged. Among them, the problem of water pollution is particularly serious. Wastewater contains a large amount of organic pollutants that are difficult to biodegrade, such as chlorobenzene organic matter and chlorophenol compounds. These substances seriously endanger human health, so the use of low-cost technology to deal with organic pollutants in water is a major problem that needs to be solved urgently. [0003] Photocatalytic degradation of organic pollutants has the a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/42B01J21/06B01J35/06B01J37/02
Inventor 安保礼戴樊增黄小迪
Owner SHANGHAI UNIV