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Efficient and stable visible light polyaniline group nanometer silver phosphate compound photocatalyst and preparation method thereof

A polyaniline-based, visible light technology, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc. Improve stability, reduce photocorrosion, and improve catalytic performance

Active Publication Date: 2013-02-20
HUAWEI TEHCHNOLOGIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ag 3 PO 4 It is a new type of semiconductor photocatalyst with high photocatalytic activity under visible light, but as the patent CN101940937A discloses a high-efficiency visible light catalyst silver phosphate and its preparation method, the common Ag 3 PO 4 The particle size is above 400nm, thus reducing its catalytic activity, and in the absence of electron acceptors, Ag 3 PO 4 It is easy to be photocorroded to form metallic silver, resulting in a decrease in catalytic stability, which limits its practical application

Method used

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  • Efficient and stable visible light polyaniline group nanometer silver phosphate compound photocatalyst and preparation method thereof
  • Efficient and stable visible light polyaniline group nanometer silver phosphate compound photocatalyst and preparation method thereof
  • Efficient and stable visible light polyaniline group nanometer silver phosphate compound photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0016] Take 0.6ml of aniline from secondary rectification and add it to 20ml 1mol L -1 Hydrochloric acid solution, and cooled to 0 ° C, slowly dropwise added 0.5g·mL -1 The ammonium persulfate solution was reacted for 6 hours and terminated, filtered, washed with water, and dried to obtain chain polyaniline; ultrasonically dispersed 0.1 g of chain polyaniline in 75 g of toluene solvent; added 1.5 g of silver nitrate, 10 g of oleylamine, 15g of ethanol, stirred for 1.5h; then added 1.5g of phosphoric acid, stirred for 18h; finally it was filtered, the precipitate was collected, washed with alcohol, washed with water, and dried to obtain a polyaniline-based nano-silver phosphate composite photocatalyst, polyaniline and Ag 3 PO 4 The mass ratio is 1:12. The prepared polyaniline-based nano-silver phosphate composite photocatalyst was used to degrade rhodamine B under visible light to measure its catalytic activity. It was found that the dye degradation rate exceeded 98% within 8...

Embodiment 2

[0018] Take 0.6ml of aniline from secondary rectification and add it to 20ml 1mol L -1 Hydrochloric acid solution, and cooled to 0 ° C, slowly dropwise added 0.5g·mL -1 Terminate the ammonium persulfate solution after reacting for 6 hours, filter, wash with water, and dry to obtain chain polyaniline; ultrasonically disperse 0.08 g of chain polyaniline in 75 g of dimethylformamide solvent; add 1.5 g of silver nitrate, 10g oleic acid, 15g ethanol, stirred for 1.5h; then added 1.5g of phosphoric acid, stirred for 18h; finally it was filtered, the precipitate was collected, washed with alcohol, washed with water, and dried to obtain a polyaniline-based nano-silver phosphate composite photocatalyst, Polyaniline and Ag 3 PO 4 The mass ratio is 1:15. The prepared polyaniline-based nano-silver phosphate composite photocatalyst degraded rhodamine B under visible light to measure its catalytic activity. It was found that the dye degradation rate exceeded 98% within 12 minutes, and re...

Embodiment 3

[0020] Take 0.6ml of aniline from secondary rectification and add it to 20ml 1mol L -1 Hydrochloric acid solution, and cooled to 0 ° C, slowly dropwise added 0.5g·mL -1 Terminate the ammonium persulfate solution after reacting for 6 hours, filter, wash with water, and dry to obtain chain polyaniline; ultrasonically disperse 0.06g chain polyaniline in 30g toluene solvent; add 1.5g silver nitrate and 7.5g oleic acid to it , 3g ethanol, stirred for 1h; then added 1.5g of phosphoric acid, stirred for 12h; finally it was filtered, the precipitate was collected, washed with alcohol, washed with water, and dried to obtain a polyaniline-based nano-silver phosphate composite photocatalyst, polyaniline and Ag 3 PO 4 The mass ratio is 1:20. The prepared polyaniline-based nano-silver phosphate composite photocatalyst was used to degrade rhodamine B under visible light to measure its catalytic activity. It was found that the dye degradation rate exceeded 98% within 16 minutes, and remain...

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Abstract

The invention relates to an efficient and stable visible light polyaniline group nanometer silver phosphate compound photocatalyst and a preparation method thereof. The compound photocatalyst is formed by compounding polyaniline and silver phosphate. The preparation steps include: (1) preparing hydrochloric acid mixed chain polyaniline; (2) ultrasonic dispersing the polyaniline in a polar organic solvent; (3) dissolving silver nitrate, surfactant and ethanol in a system obtained in the (2), and stirring; (4) dropping a phosphoric acid solution into the system obtained in the (3) and keeping stirring; and (5) filtering the system obtained in the (4), washing with alcohol, washing with water, and drying to obtain the polyaniline group nanometer silver phosphate compound photocatalyst. Grain size of Ag3PO4 in the obtained compound photocatalyst is only 5-50 nm, the chain polyaniline is used as a carrier of the Ag3PO4 grains, nanometer grains are prevented from reuniting effectively, and catalytic performance is greatly improved. Due to the effect of a polyaniline electron acceptor, light corrosivity of Ag3PO4 can be reduced, and stability of catalyst is greatly improved.

Description

technical field [0001] The invention belongs to a photocatalyst and a preparation method thereof, in particular to a highly efficient and stable visible light polyaniline-based nano-silver phosphate composite photocatalyst and a preparation method thereof Background technique [0002] Photocatalytic technology has become one of the hotspots of solar energy utilization due to its advantages of easy operation, no pollution, and direct use of sunlight. The photocatalyst titanium dioxide has attracted widespread attention due to its cheap, non-toxic, stable, and good catalytic activity. However, the traditional semiconductor photocatalyst of titanium dioxide needs to be excited by ultraviolet light with a wavelength of less than 400nm to show photocatalytic activity. Therefore, the development of high-efficiency Stable and stable visible light photocatalysts, which expand the wavelength range of sunlight absorption, have become a research hotspot in the field of photocatalysis r...

Claims

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Application Information

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IPC IPC(8): B01J31/26A62D3/17A62D101/28
Inventor 何光裕钱茂公陈海群纪俊玲孟启何明阳汪信
Owner HUAWEI TEHCHNOLOGIES CO LTD
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