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Ferrite/polypyrrole (PPy) magnetic nano-photocatalyst and preparation method thereof

A magnetic nanometer and ferrite technology, applied in the field of material chemistry, can solve the problems of recovery and recycling, and achieve convenient recovery and recycling, high-efficiency adsorption performance, good application prospects and economic benefits Effect

Inactive Publication Date: 2012-10-24
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, although these photocatalysts have certain photocatalytic activity, the recovery and recycling after use have not been well solved.

Method used

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  • Ferrite/polypyrrole (PPy) magnetic nano-photocatalyst and preparation method thereof
  • Ferrite/polypyrrole (PPy) magnetic nano-photocatalyst and preparation method thereof
  • Ferrite/polypyrrole (PPy) magnetic nano-photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Embodiment 1: the preparation method of cobalt ferrite / polypyrrole magnetic nano-catalyst, comprising the following steps:

[0027] The first step is to stir and dissolve ferric nitrate and cobalt nitrate with a molar ratio of 2:1 in ethanol;

[0028] In the second step, the mol ratio with the cobalt nitrate added in the step 1 is that 20 sodium hydroxide is added to the solution obtained in the first step, and is fully stirred;

[0029] In the third step, the reaction system of the second step was transferred to a hydrothermal kettle and heated to 180 ° C for 20 h;

[0030] The fourth step, the product of the third step is centrifuged, washed with deionized water, and dried to obtain nano-cobalt ferrite;

[0031] The 5th step, the nano cobalt ferrite and ammonium persulfate obtained in the 4th step are dispersed in 0.5mol / L hydrogen chloride solution;

[0032] The 6th step, at 0~4 ℃ of temperature, the pyrrole that is 1:1 with the mol ratio of the ammonium persulfate...

Embodiment 2

[0041] Embodiment 2: the preparation method of nickel ferrite / polypyrrole magnetic nanocatalyst, comprises the following steps:

[0042] The first step, the ferric nitrate and nickel nitrate that the molar ratio is 2:1 is stirred in ethanol for 30min;

[0043] In the second step, the mol ratio with the nickel nitrate added in the step one is that 40 sodium hydroxide is added to the solution obtained in the first step, and is fully stirred;

[0044] In the third step, the reaction system in the second step was transferred to a hydrothermal kettle and heated to 120 ° C for 12 h;

[0045]In the fourth step, the product of the third step is centrifuged, washed with deionized water, and dried to obtain nano-nickel ferrite;

[0046] The 5th step, the nano nickel ferrite and the ammonium persulfate of the 4th step gained are dispersed in the 1mol / L hydrogen chloride solution;

[0047] In the sixth step, at a temperature of 0 to 4°C, pyrrole with a molar ratio of 1:1 to the ammonium...

Embodiment 3

[0053] Implementation example 3: the preparation method of copper ferrite / polypyrrole magnetic nano-catalyst comprises the following steps:

[0054] In the first step, ferric nitrate and copper nitrate with a molar ratio of 2:1 were stirred in ethanol for 10 min;

[0055] In the second step, the mol ratio of the copper nitrate added in the step one is that 5 sodium hydroxide is added in the solution obtained in the first step, fully stirred;

[0056] In the third step, transfer the reaction system of the second step to a hydrothermal kettle and raise the temperature to 200°C, and react for 24 hours;

[0057] In the fourth step, the product of the third step is centrifuged, washed with deionized water, and dried to obtain nano-copper ferrite;

[0058] The 5th step, the nano copper ferrite of the 4th step gained and ammonium persulfate are dispersed in the 0.8mol / L hydrogen chloride solution;

[0059] In the sixth step, at a temperature of 0 to 4°C, pyrrole with a molar ratio ...

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Abstract

The invention relates to a ferrite / polypyrrole (PPy) magnetic nano-photocatalyst which is composed of magnetic ferrite nanoparticles with spinel structure, and polypyrrole coated on surface of the ferrite nanoparticles. The ferrite has molecular formula of MFe2O4, wherein M is Ni, Cu, Zn, Mn or Co. A preparation method of the ferrite / PPy magnetic nano-photocatalyst comprises the steps of dispersing ferrite nanoparticles and initiator in acid solution; adding pyrrole into the above system under constant temperature; reacting under thermostatic condition; performing filtration separation on resultant product with large amount of deionized water; and drying to obtain cobalt ferrite / PPy magnetic nanomaterial. The inventive photocatalyst has the advantages of high dye adsorbability, visible light response, magnetism, convenient recovery and cyclic usage.

Description

technical field [0001] The invention adopts an in-situ oxidative polymerization method to prepare a nano-magnetic photocatalyst, in particular a ferrite / polypyrrole magnetic nano-catalyst and a preparation method thereof, belonging to the field of material chemistry. Background technique [0002] At present, in the treatment of dye wastewater, the more commonly used methods include adsorption, photocatalytic degradation and biodegradation. Polypyrrole has been widely used in the field of dye wastewater treatment in recent years due to its excellent chemical stability, cheap preparation method and special energy band structure. [0003] Adsorption has been widely used due to its easy operation. At present, the commonly used adsorbents mainly include activated carbon, biological materials, fly ash, etc. However, many of the above adsorbents are not recyclable. Recently, magnetic nanoadsorbents based on polypyrrole 1 have also been reported [Journal of Alloys and Compounds 50...

Claims

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Application Information

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IPC IPC(8): B01J31/28B01J31/26B01J31/32C02F1/30C02F1/28C02F1/58
Inventor 孙小强熊攀陈海群陈群何明阳汪信朱俊武何光裕孙敬文付永胜纪俊玲姚超
Owner CHANGZHOU UNIV
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