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Preparation method of conductive polymer polypyrrole modified TiO2 and application thereof

A neutral and reactive technology, applied in chemical instruments and methods, organic compound/hydride/coordination complex catalysts, water pollutants, etc., can solve problems such as high energy band gap and low photocatalytic efficiency

Inactive Publication Date: 2013-03-13
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However TiO 2 With a high energy band gap, only the ultraviolet part of sunlight can be used, resulting in a relatively low photocatalytic efficiency

Method used

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  • Preparation method of conductive polymer polypyrrole modified TiO2 and application thereof
  • Preparation method of conductive polymer polypyrrole modified TiO2 and application thereof
  • Preparation method of conductive polymer polypyrrole modified TiO2 and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Prepare 80 mL of hydrochloric acid solution with pH=1, and weigh 1.73g of TiOSO 4 Add it to 80 mL of hydrochloric acid at PH=1, and put it in a water bath at 5°C and stir it dynamically until the solution is clear. Add 3.5 mL of pyrrole dropwise to the above solution, and then slowly add 3.9 mL of hydrogen peroxide to the mixed solution. (The mass concentration is 30%). Continue to stir at a constant temperature for 6 hours. After the reaction, the precipitate is repeatedly washed with deionized water and absolute ethanol until the solution is neutral. Finally, the sample is placed in a vacuum oven at 60°C. Drying in middle temperature for 12h, the PPy-TiO 2 composite photocatalyst.

[0023] (2) The PPy-TiO prepared in the above step (1) 2 The photocatalytic degradation test of the composite photocatalyst was carried out in a photochemical reaction apparatus, and the degradation rate of salicylic acid by the photocatalyst was 48.57%.

[0024] figure 1 It is the ...

Embodiment 2

[0027] (1) Prepare 80 mL of hydrochloric acid solution with pH=2, and weigh 1.73g of TiOSO 4 Add it to 80 mL of hydrochloric acid at PH=2, put it in a water bath at 5°C and stir it until the solution is clear, add 3.5 mL of pyrrole dropwise to the above solution, and then slowly add 3.9 mL of hydrogen peroxide to the mixed solution (mass concentration is 30%), continue dynamic stirring at a constant temperature for 6 hours, after the reaction, the precipitate is washed repeatedly with deionized water and absolute ethanol for several times until the solution is neutral, and finally the sample is placed in a vacuum oven at 60°C Drying in middle temperature for 12h, the PPy-TiO 2 composite photocatalyst.

[0028] (2) The PPy-TiO prepared in the above step (1) 2 The photocatalytic degradation test of the composite photocatalyst was carried out in a photochemical reaction apparatus, and the degradation rate of salicylic acid by the photocatalyst was 40.57%.

Embodiment 3

[0030] (1) Prepare 80 mL of hydrochloric acid solution with pH=3, and weigh 1.73g of TiOSO 4 Add it to 80 mL of hydrochloric acid at PH=3, and put it in a water bath at 5°C to stir until the solution is clear. Add 3.5 mL of pyrrole dropwise to the above solution, and then slowly add 3.9 mL of hydrogen peroxide to the mixed solution. (mass concentration is 30%), continue dynamic stirring at a constant temperature for 6 hours, after the reaction, the precipitate is washed repeatedly with deionized water and absolute ethanol for several times until the solution is neutral, and finally the sample is placed in a vacuum oven at 60°C Drying in middle temperature for 12h, the PPy-TiO 2 composite photocatalyst.

[0031] (2) The PPy-TiO prepared in the above step (1) 2 The photocatalytic degradation test of the composite photocatalyst was carried out in a photochemical reaction apparatus, and the degradation rate of salicylic acid by the photocatalyst was 36.57%. Therefore, the compa...

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Abstract

The invention discloses a preparation method of conductive polymer polypyrrole modified TiO2 and application of the conductive polymer polypyrrole modified TiO2, and belongs to the technical field of preparation of an environmental material. The preparation method comprises the following steps of: configuring 80 mL of hydrochloric acid solution with the pH (Potential of Hydrogen) being 1-3; weighing 1.73g of TiOSO4 into 80mL of hydrochloric acid with the pH (Potential of Hydrogen) being 1-3; placing into a water-bath boiler at 5-25 DEG C to be agitated by power until the solution is classified; gradually dropping into 3.5mL of pyrrole; slowly adding 3.9mL of hydrogen peroxide with the mass concentration of 30% into a mixed solution; agitating at a constant temperature by the power for 6 hours; after the reaction is finished, washing sediment by de-ionized water and absolute ethyl alcohol for many times until the sediment is neutral; and drying a sample at 60 DEG C in vacuum for 12 hours. The preparation method has the advantages that the synthesized PPy-TiO2 is in a scale-shaped hollow pipe-shaped structure; the specific surface area and the aperture are very large; and the effective separation of photoproduction electrons and a hollow cavity can be realized, and a catalyst is protected against inactivation or reduction of catalytic activity caused by blocking.

Description

technical field [0001] The invention belongs to the technical field of environmental material preparation, and relates to a sol-gel method for preparing conductive polymer polypyrrole modified TiO 2 composite catalyst method. Background technique [0002] Salicylic acid, also known as o-hydroxybenzoic acid, is a typical organic pollutant. Salicylic acid is easy to sublimate and can volatilize with water vapor. It has the chemical properties of phenol and carboxylic acid. If the volatile phenol in the wastewater discharged from the production of salicylic acid series products exceeds the standard, such pollutants will endanger the normal life of human beings. There are many derivatives of salicylic acid, such as: sodium salicylate, salicylamide, acetylsalicylamide, etc., and the commonly used antipyretic and analgesic drug "aspirin" in medicine is also one of them. Intermediates are also degradation products of aspirin. In order to ensure that the discharged wastewater me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J35/10C02F1/30C02F101/34
Inventor 闫永胜刘小林霍鹏伟高旬吴迪逯子扬
Owner JIANGSU UNIV
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