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Preparation method and application of magnetic nano iron-manganese double metal oxide composite catalyst

A double metal oxide, composite catalyst technology, applied in metal/metal oxide/metal hydroxide catalyst, catalyst activation/preparation, physical/chemical process catalyst, etc., can solve the problem of unsatisfactory catalytic effect and poor catalytic effect. Ideal, secondary pollution and other problems, to reduce secondary pollution, overcome the difficulty of difficult recovery, and achieve the effect of less dissolution

Inactive Publication Date: 2018-08-17
HUAQIAO UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the widely used manganese oxides have a good effect in activating PMS, but the catalytic effect of PS is not ideal and it is difficult to recycle and cause secondary pollution.
Also using Fe alone 3 o 4 Activation of PS, the catalytic effect is not very ideal

Method used

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  • Preparation method and application of magnetic nano iron-manganese double metal oxide composite catalyst
  • Preparation method and application of magnetic nano iron-manganese double metal oxide composite catalyst
  • Preparation method and application of magnetic nano iron-manganese double metal oxide composite catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) Dissolve ferrous sulfate heptahydrate and polyvinylpyrrolidone in deionized water at a mass ratio of 2.78 to 3:1, and stir quickly and evenly.

[0034] (2) Stir the material obtained in step (1) magnetically in an oil bath at 70-85°C, quickly add NaOH solution to make the molar ratio of ferrous sulfate to 2-3:1, seal the reaction for 2-3 hours, and black The precipitate was dried under vacuum at 65°C to obtain Fe 3 o 4 .

[0035] (3) Fe obtained by step (2)3 o 4 Grinding into powder, then dissolving the powder and potassium permanganate in deionized water at a mass ratio of 4:5-6, ultrasonically mixing for 5-10 minutes, and then adding 0.7-2.0 mL of dilute hydrochloric acid dropwise to shake well.

[0036] (4) Transfer the material obtained in step (3) into a high-pressure reactor, heat and react at 100-120°C for 10-12 hours, then cool to room temperature, then wash with deionized water until the supernatant is neutral, and dry under vacuum Obtain the magnetic n...

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Abstract

The invention discloses a preparation method and application of a magnetic nano iron-manganese double metal oxide composite catalyst. The magnetic nano iron-manganese double metal oxide composite catalyst combines Fe3O4 and alpha-MnO2 to overcome the difficulty of recycling and reduce secondary pollution, higher catalytic activity can be achieved through the synergistic effect of the Fe3O4 and thealpha-MnO2, and PS can be effectively activated to generate a large amount of free radicals to degrade organic matters in water. The magnetic nano iron-manganese double metal oxide composite catalystprepared by the method has a saturation magnetization of 39.89 emu / g, and can be quickly separated from water by an external magnetic field.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a preparation method and application of a magnetic nanometer iron-manganese double metal oxide composite catalyst. Background technique [0002] Fenton and Fenton-like reactions are widely used in chemical oxidation methods, and their advantage is that the generated hydroxyl radicals (·OH) have strong oxidizing properties to achieve the purpose of removing pollutants. But because it requires the reaction condition to be around pH 3, and H 2 o 2 It is expensive and difficult to preserve, resulting in high processing costs. [0003] Based on the sulfate radical (SO 4 - ·) The advanced oxidation technology of the reaction has been widely used in wastewater treatment, because the strong oxidizing free radicals it produces can efficiently oxidize and degrade organic matter. SO produced by activating permonosulfate (PMS) and persulfate (PS) 4 - ·(E 0 =2.5~3.1V) Co...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J37/03B01J37/10C02F1/72C02F101/34
CPCC02F1/725B01J23/002B01J23/8892B01J37/031B01J37/10C02F2305/026C02F2101/345B01J35/393B01J35/23B01J35/33
Inventor 洪俊明董正玉张倩吴丽颖
Owner HUAQIAO UNIVERSITY
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