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Catalyst for heterogeneous Fenton reaction

A Fenton reaction and catalyst technology, applied in catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problem of easy dissolution and loss of iron, complicated preparation process and high cost problem, to achieve the effect of easy recovery, high catalytic activity and considerable economic benefits

Inactive Publication Date: 2017-12-22
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing reports, iron-based heterogeneous Fenton-like catalysts have disadvantages such as complicated preparation process, high cost, and easy dissolution and loss of iron.

Method used

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  • Catalyst for heterogeneous Fenton reaction
  • Catalyst for heterogeneous Fenton reaction
  • Catalyst for heterogeneous Fenton reaction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dissolve 1mmol of ferric nitrate in 10mL of water, then add 10mmol of sodium hydroxide, stir for 30 minutes and centrifuge, and dissolve the separated solid in a mixture of 70ml of ethanol and water (ethanol / water=4 / 3, volume ratio) , then add 0.1mmol cetyltrimethylammonium bromide, then add 4mmol ethyl orthosilicate, stir at 25°C for 6 hours, then centrifuge to collect the solid, dry at 80°C and then bake at 450°C for 5 hours.

[0029] Such as figure 1 As shown, before firing, the iron oxide and silicon oxide particles are both nanoscale particles, and the silicon oxide nanoscale particles are coated on the outside of the iron oxide nanoscale particles. After firing, it can be seen that silicon oxide is still coated on the outside of iron oxide, which can effectively prevent the dissolution of internal iron, such as figure 2 shown. image 3 It is an X-ray diffraction photo of the catalyst of the present invention after calcination, it can be seen that iron oxide and...

Embodiment 2

[0031] Dissolve 1mmol ferric chloride in 100mL water, then add 3mmol sodium hydroxide, centrifuge after stirring for 5 minutes, dissolve the solid obtained by separation in the mixed solution of 10ml ethanol and water (ethanol / water=5 / 1, volume ratio ), then add 0.02mmol cetyltrimethylammonium bromide, then add 0.44mmol tetraethyl orthosilicate, stir at 20°C for 10 hours, then centrifuge to collect the solid, dry at 50°C and then roast at 350°C for 15 Hour.

Embodiment 3

[0033] Dissolve 1mmol ferric sulfate in 50mL water, then add 8mmol potassium hydroxide, centrifuge after stirring for 60 minutes, dissolve the separated solid in a mixed solution of 100ml ethanol and water (ethanol / water=1 / 5, volume ratio) , then add 0.04mmol cetyltrimethylammonium bromide, then add 7.5mmol tetraethyl orthosilicate, stir at 40°C for 3 hours, then centrifuge to collect the solid, dry at 200°C and then bake at 800°C for 2 hours .

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Abstract

The invention discloses a catalyst for iron-based multi-phase Fenton reaction. The catalyst is prepared from ferric oxide and silicon oxide, wherein the silicon oxide coats the ferric oxide; the ferric oxide content is between 15 percent and 75 percent; the silicon oxide content is between 85 percent and 25 percent. The catalyst has good catalytic activity on catalytic degradation of organic contaminants (such as phenol, nitrobenzene and methylthionine chloride) through Fenton reaction. In addition, the cost is low, the recovery is easy; the repeated use and the good application prospects are realized.

Description

technical field [0001] The invention relates to the technical field of environmental functional materials and wastewater treatment, in particular to a catalyst for heterogeneous Fenton-like reactions. Background technique [0002] Using Fenton reaction to remove refractory organic pollutants in water is an effective sewage treatment technology. Fenton's reagent is Fe 2+ with H 2 o 2 The mixed solution of the reagent has strong oxidizing properties, and the reaction using this reagent is called the Fenton reaction. In the process of using the Fenton reaction to treat refractory organic pollutants in water, the reaction produces hydroxyl radicals (HO ) with strong oxidative properties. The hydroxyl radicals have high oxidation activity and can degrade refractory organic pollutants in water. Degradation, removal and conversion into environmentally friendly CO 2 and H 2 O, is an environmentally friendly green catalytic process. However, the Fenton reaction is usually carr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J37/03B01J37/08C02F1/72C02F101/34C02F101/38
CPCC02F1/722B01J23/002B01J23/745B01J37/031B01J37/082C02F2101/38C02F2101/345C02F2101/308C02F2305/026B01J35/397B01J35/23
Inventor 陈哲
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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