Preparation method of magnetic iron-based heterogeneous Fenton catalyst taking graphene as carrier and application

A graphene and heterogeneous technology, applied in the fields of nanomaterials and environmental science, can solve the problems of difficult recycling of Fenton catalysts and chemical sludge, and achieve the effect of promoting COD removal, promoting decomposition, and easy recycling

Inactive Publication Date: 2017-05-17
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The used catalyst is recovered by an external magnetic field, which solves the difficulty of recycling traditional Fenton catalysts and the generation of a large amount of chemical sludge

Method used

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  • Preparation method of magnetic iron-based heterogeneous Fenton catalyst taking graphene as carrier and application
  • Preparation method of magnetic iron-based heterogeneous Fenton catalyst taking graphene as carrier and application
  • Preparation method of magnetic iron-based heterogeneous Fenton catalyst taking graphene as carrier and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] a. Weigh 1.0 g of graphene oxide and add it to 200 mL of a mixture of ethylene glycol and diethylene glycol with a volume ratio of 19:1, ultrasonically disperse for 1 hour, then add 10 g of sodium acrylate, 15 g of sodium acetate, and 5.4 g of FeCl 3 ·6H 2 0, stirred at room temperature for 30min, fully dissolved to obtain a mixed solution;

[0058] b. Transfer the mixed solution obtained in a to a polytetrafluoro reactor at a temperature of 200° C., keep it warm for 10 hours, and then cool to room temperature. The product obtained is washed repeatedly with ethanol and water with a volume ratio of 1:1, and the cleaned The product was dispersed in 600ml of deoxygenated deionized water to obtain Fe 3 o 4 - an aqueous dispersion of graphene;

[0059] c. Weigh 1.5g FeSO 4 ·7H 2 O was dissolved in 50ml of deoxygenated deionized water;

[0060] d. Use 1mol / L NaOH solution to adjust the pH value of 50ml of deoxygenated deionized water in step c to 9, then add 1.36g NaBH ...

Embodiment 2

[0068] a. Weigh 1.5g of graphene oxide and add it to 200mL of a mixture of ethylene glycol and diethylene glycol with a volume ratio of 19:1, ultrasonically disperse for 1 hour, and then add 7.5g of FeCl 3 ·6H 2 0. 15g sodium acetate and 10g sodium acrylate were stirred at room temperature for 30min to fully dissolve to obtain a mixed solution;

[0069] b. Transfer the mixed solution obtained in a to a 100ml polytetrafluoro reactor, keep the temperature at 200°C for 10 hours, then cool to room temperature, and wash the obtained product repeatedly with ethanol and water with a volume ratio of 1:1. The final product was dispersed in 600ml of deoxygenated deionized water to obtain Fe 3 o 4 - an aqueous dispersion of graphene;

[0070] c. Weigh 2.0g FeSO 4 ·7H 2 O was dissolved in 50ml of deoxygenated deionized water;

[0071] d. Use 1mol / L NaOH solution to adjust the pH value of 50ml of deoxygenated deionized water in step c to 9, then add 2.0g NaBH 4 dissolve;

[0072] e...

Embodiment 3

[0077] a. Weigh 1.5g of graphene oxide, add it to 200ml of a mixture of ethylene glycol and diethylene glycol with a volume ratio of 19:1, ultrasonically disperse for 1h, and then add 5.4g of FeCl 3 ·6H 2 0. 15g sodium acetate and 10g sodium acrylate were stirred at room temperature to fully dissolve to obtain a mixed solution;

[0078] b. Transfer the mixed solution obtained in a to a 100ml polytetrafluoro reactor, keep the temperature at 200°C for 12 hours, then cool to room temperature, and wash the obtained product repeatedly with ethanol and water with a volume ratio of 1:1. The final product was dispersed in 600ml of deoxygenated deionized water to obtain Fe 3 o 4 - an aqueous dispersion of graphene;

[0079] c. Weigh 1.8g FeSO 4 ·7H 2 O was dissolved in 50ml of deoxygenated deionized water;

[0080] d. Use 1mol / L NaOH solution to adjust the pH value of 50ml of deoxygenated deionized water in step c to 9, then add 2.0g NaBH4 dissolve;

[0081] e. FeSO 4 ·7H 2 O ...

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Abstract

The invention relates to a preparation method of a magnetic iron-based heterogeneous Fenton catalyst taking graphene as a carrier and an application. According to the method, the graphene serves as the carrier, magnetic nano-scale ferroferric oxide and nano-scale zero-valent iron (Fe0) are compounded to the surface of the graphene to serve as the heterogeneous Fenton catalyst in an in-situ growth mode, aggregation of catalytic active nano-particles can be effectively prevented by the graphene serving as the carrier, and more active sites are exposed. Besides, the graphene has high electron transfer capability, Fe0 easily transfers electrons to Fe3+ by taking the graphene as the carrier, Fe3+ is promoted to be transformed into Fe2+, so that catalytic activity of the catalyst is improved, the catalyst is easily recovered and reusable, pollutant removal efficiency is improved, phenol removal efficiency reaches 99% or more, and the used catalyst is recovered by an external magnetic field. The preparation method solves the problems that traditional Fenton catalysts are difficultly recycled and generate a lot of chemical sludge, and the preparation method has a certain economic value and practical value.

Description

technical field [0001] The invention relates to a preparation method and application of a magnetic iron-based heterogeneous Fenton-like catalyst with graphene as a carrier, belonging to the fields of nanomaterials and environmental science. Background technique [0002] In recent years, high-concentration and refractory toxic and harmful organic pollutants such as phenols, antibiotics, pesticides, and endocrine disruptors have been continuously discharged into water bodies, and accumulated in the human body, seriously threatening human life and health. Therefore, It is imminent to develop new and efficient technologies and methods for removing such pollutants. [0003] The classic homogeneous Fenton reagent is Fe 2+ with H 2 o 2 The combination of hydroxyl radicals (HO ) generated under acidic conditions, hydroxyl radicals have a very high oxidation potential (2.8V), which can effectively oxidize and degrade organic pollution into CO 2 and H 2 O, or small molecule subst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745C02F1/72C02F101/34
CPCB01J23/745B01J35/0033B01J35/006C02F1/722C02F1/725C02F2101/345C02F2305/026
Inventor 张亚刚王朋磊周鑫张乐涛王璐璐郅柯柯张岚徐鲁姜莹芳
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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