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Ferrate/polyaniline magnetic nanometer catalytic agent and preparation method thereof

A magnetic nano and ferrite technology, applied in the field of material chemistry, can solve the problems of non-magnetism, non-selective adsorption performance of catalysts, and inability to easily recycle and recycle, and achieve excellent adsorption performance, excellent visible light catalytic activity, excellent Effect of Selective Adsorption Properties

Inactive Publication Date: 2012-08-08
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a catalyst with remarkable selectivity for the problems that existing catalysts do not have selective adsorption performance, do not have magnetism, and cannot be easily recovered and recycled. Adsorption performance and good photocatalytic activity ferrite / polyaniline magnetic nano catalyst and preparation method thereof

Method used

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  • Ferrate/polyaniline magnetic nanometer catalytic agent and preparation method thereof
  • Ferrate/polyaniline magnetic nanometer catalytic agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Example 1: Cobalt ferrite / polyaniline magnetic nano-catalyst, the preparation method that polyaniline content is 5wt%, comprises the following steps:

[0027] In the first step, ferric nitrate and cobalt nitrate with a mol ratio of 2:1 were stirred in ethanol for 90min;

[0028] In the second step, sodium hydroxide with a mol ratio of 80:1 to the cobalt nitrate added in step one is added to the solution obtained in the first step, and stirred for 60 min;

[0029] In the third step, react the mixed solution in the second step at 120°C for 12 hours, centrifuge and dry to obtain nano-cobalt ferrite;

[0030] The 4th step, the nano cobalt ferrite that ammonium persulfate and the 3rd step gained are dispersed in the hydrochloric acid solution that concentration is 0.5mol / L;

[0031] In the fifth step, add aniline with a molar ratio of 0.1 to the ammonium persulfate added in the fourth step to the system obtained in the fifth step, react at a temperature of 0°C for 24 h, a...

Embodiment 2

[0033] Example 2: Nickel ferrite / polyaniline magnetic nano-catalyst, the preparation method that polyaniline content is 90wt%, comprises the following steps:

[0034] The first step, be that ferric nitrate and nickel chloride of 2:1 are stirred 10min in ethanol with mol ratio;

[0035] In the second step, ammonia water having a molar ratio of 60:1 to the divalent transition metal salt added in step 1 is added to the solution obtained in the first step, and stirred for 10 min;

[0036] In the third step, the mixed solution in the second step was reacted at 140° C. for 24 h, then centrifuged and dried to obtain nano-nickel ferrite;

[0037] The 4th step, ammonium persulfate and the nano-nickel ferrite of the 3rd step gained are dispersed in the sulfuric acid solution that concentration is 1mol / L;

[0038] In the fifth step, aniline with a molar ratio of 10 to the ammonium persulfate added in the fourth step is added to the system obtained in the fifth step, and the reaction i...

Embodiment 3

[0039] Example 3: Copper ferrite / polyaniline magnetic nano-catalyst, the preparation method that polyaniline content is 10wt%, comprises the following steps:

[0040] In the first step, ferric nitrate and copper sulfate with a molar ratio of 2:1 were stirred in ethanol for 30 min;

[0041] In the second step, urea with a mol ratio of 40:1 to the divalent transition metal salt added in step one is added to the solution obtained in the first step, and stirred for 25 min;

[0042] In the third step, react the mixed solution in the second step at 160°C for 20 hours, then centrifuge and dry to obtain nano-copper ferrite;

[0043] The 4th step, the nano-copper ferrite that ammonium persulfate and the 3rd step gained are dispersed in the phosphoric acid solution that concentration is 2mol / L;

[0044] In the fifth step, aniline with a molar ratio of 1 to the ammonium persulfate added in the fourth step is added to the system obtained in the fifth step, and the reaction is carried out...

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Abstract

The invention adopts an in-situ oxidation polymerization method and enables the polyaniline to be wrapped on the surface of the magnetic ferrate, and a series of ferrate / polyaniline magnetic nano composite materials can be prepared by using the method and comprise cobalt ferrite / polyaniline, nickel ferrite / polyaniline, copper ferrite / polyaniline, zinc ferrite / polyaniline and manganese ferrite / polyaniline and the like. A prepared ferrate / polyaniline magnetic nanometer catalytic agent has obvious preferential adsorption performance and good photoelectrical activity, and has good application prospects and economic benefits in the fields of adsorption, photocatalysis, lithium ion batteries and the like.

Description

technical field [0001] The invention relates to a catalyst and a preparation method thereof, in particular to a ferrite / polyaniline magnetic nanometer 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. Among them, adsorption has been widely used because of its simple operation. The commonly used adsorbents mainly include activated carbon, biological materials, fly ash and so on. However, many of the above adsorbents do not have excellent selective adsorption performance and recyclable characteristics. Recently, Debajyoti Mahanta et al. found that doped polyaniline has selective adsorption properties and can selectively adsorb anionic dyes [D. Mahanta et al. J. Phys. Chem. B 2008, 112, 10153-10157.]. However, magnetic adsorbents with selective adsorption properti...

Claims

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Application Information

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IPC IPC(8): B01J31/28B01J31/32C02F1/28C02F1/30
Inventor 汪信熊攀付永胜孙敬文朱俊武孙小强陈群何明阳
Owner NANJING UNIV OF SCI & TECH
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