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Preparation method of heterogeneous Fenton catalyst, and method for visible photocatalytic degradation of organic pollutants

A catalyst, visible light technology, applied in water pollutants, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of ineffective use of solar visible light and lack of adsorption function

Inactive Publication Date: 2013-03-27
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this patent has advanced the heterogeneous photo-Fenton catalysis technology one step forward, it can only utilize ultraviolet light in solar energy (accounting for about 4% of solar energy), and cannot effectively utilize visible light in solar energy (accounting for about 4% of solar energy). 43%), also does not have the adsorption function

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Preparation of photocatalyst: Graphene-NiFe was prepared by the above method 2 o 4 Photofenton catalyst 0.2000g.

[0021] 2. Preparation of simulated organic pollutant methylene blue: take 5ml of 1g / l methylene blue and dilute to the mark in a 100ml volumetric flask.

[0022] 3. Photocatalytic degradation: Add 10ml of 50mg / l methylene blue to a 50ml beaker, dilute 5ml of 10mM oxalic acid with water to 50ml, and then accurately weigh 0.2000g graphene-NiFe 2 o 4 Add it into a beaker, place it under 300W visible light with a wavelength greater than 400nm to carry out photocatalytic reaction, and the distance between the light source and the reaction liquid surface is 20cm. Its decolorization rate can reach more than 95%.

Embodiment 2

[0024] 1. Preparation of photocatalyst: Activated carbon-NiFe was prepared by the above method 2 o 4 Photofenton catalyst 0.2000g.

[0025] 2. Preparation of organic pollutant Rhodamine B: Take 5ml of 1.0g / L Rhodamine B and dilute it to the mark in a 100ml volumetric flask.

[0026] 3. Photocatalytic degradation: Add 10mL of 50mg / L rhodamine B to a 50ml beaker, dilute 5ml of 10mM oxalic acid to 50ml with water, and then accurately weigh 0.2000g of activated carbon-NiFe 2 o 4 Add it into a beaker, place it under 300W visible light with a wavelength greater than 400nm to carry out photocatalytic reaction, and the distance between the light source and the reaction liquid surface is 20cm. Its decolorization rate can reach more than 97%.

Embodiment 3

[0028] 1. Preparation of photocatalyst: Graphite oxide-NiFe was prepared by the above method 2 o 4 Photofenton catalyst 0.2000g.

[0029] 2. Preparation of simulated organic pollutant malachite green: take 5ml of 1g / l malachite green and dilute to the mark in a 100ml volumetric flask.

[0030] 3. Photocatalytic degradation: Add 10ml of 50mg / l malachite green to a 50ml beaker, dilute 5ml of 10mM oxalic acid with water to 50ml, and then accurately weigh 0.2000g of graphite oxide-NiFe 2 o 4 Add it into a beaker, place it under 300W visible light with a wavelength greater than 400nm to carry out photocatalytic reaction, and the distance between the light source and the reaction liquid surface is 20cm. Its decolorization rate can reach more than 98%.

[0031] The above-mentioned carbon material / nickel ferrite composite photo-Fenton catalyst can degrade rhodamine B, malachite green and methylene blue by using visible light irradiation in the presence of oxalic acid, can decolori...

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Abstract

The invention provides a preparation method of a heterogeneous Fenton catalyst. The preparation method comprises the following steps: weighing ferric trichloride or ferric nitrate and nickel sulfate which are raw materials according to a molar ratio of Fe:Ni of 2:1, respectively dissolving the raw materials in ultrapure water to obtain two solutions, and uniformly mixing to obtain a mixed solution; and adding certain masses of NaOH, and graphene or graphite oxide or active carbon to the mixed solution, stirring, transferring to a reaction kettle, heating for 10min, separating in a magnetic field, washing, and drying to obtain the heterogeneous Fenton catalyst. The invention also provides a method for the visible photocatalytic degradation of organic pollutants through using the heterogeneous Fenton catalyst. The heterogeneous Fenton catalyst prepared through the preparation method is mixed with oxalic acid to degrade organic stimulating pollutants under visible lights. The organic pollutant degradation method is simple and is easy to implement, the catalyst can be separated from the solution through the applied magnetic field, and the carbon material-nickel ferrite composite catalyst can be recycled; and the method enables the chroma of polluted water to be rapidly and effectively removed.

Description

technical field [0001] The invention relates to the preparation of a heterogeneous photo-Fenton catalyst and a method for catalytically degrading organic pollutants with visible light. Background technique [0002] Invention patent (patent publication number: CN 102125848A, publication date: 2011.7.20) reports a magnetic optical Fenton heterogeneous catalyst NiFe 2 o 4 preparation and photocatalytic degradation of organic pollutants. The magnetic heterogeneous Fenton catalytic material has the functions of photo-Fenton degradation and magnetic separation, and can be used repeatedly. It can photocatalytically degrade organic pollutants using oxalic acid that exists in nature, such as that present in spinach. Although this patent has advanced the heterogeneous photo-Fenton catalysis technology one step forward, it can only utilize ultraviolet light in solar energy (accounting for about 4% of solar energy), and cannot effectively utilize visible light in solar energy (accoun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755C02F1/30C02F101/38
Inventor 刘守清冯连荣
Owner SUZHOU UNIV OF SCI & TECH
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