Preparation method and application of pomegranate-shaped magnetic visible light heterogeneous fenton catalyst material

A technology of visible light and catalyst, applied in the field of water treatment, can solve the problems of low degradation efficiency of homogeneous Fenton system, low utilization rate of hydroxyl radicals, easy precipitation to form iron sludge, etc., to improve the utilization rate of visible light and stabilize green Economical, easily recyclable results

Active Publication Date: 2022-06-07
JILIN INST OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are still some problems in the application of this system to the degradation of wastewater: the suitable pH range in the homogeneous Fenton system is narrow (pH is 3-5); under alkaline conditions, iron ions are easy to precipitate to form iron sludge, resulting in the loss of catalyst ; The utilization rate of hydroxyl radicals in the system is not high, and the actual consumption of hydroxyl radicals for degradation is more than theoretically required
Due to the limitation of homogeneous Fenton reaction conditions and expensive raw materials, the degradation efficiency of homogeneous Fenton system is not high, and the processing cost is too high

Method used

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  • Preparation method and application of pomegranate-shaped magnetic visible light heterogeneous fenton catalyst material
  • Preparation method and application of pomegranate-shaped magnetic visible light heterogeneous fenton catalyst material
  • Preparation method and application of pomegranate-shaped magnetic visible light heterogeneous fenton catalyst material

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Experimental program
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Effect test

Embodiment 1

[0020] 200 mg of polyacrylic acid, add 1 mL of deionized water to sonic dissolve, stir and drop 100 ml of deionized water sonic, then drop 700 μL of ammonia for 30 min, weigh 223 mg of zinc nitrate added to the above solution, and then slowly add 400 ml of isopropanol to the solution. Weigh 300 mg of ferrous chloride tetrahydrate added to the above solution stirred for 12 h, the resulting mixed solution was centrifuged and separated (5000 rpm, 8min), the precipitate was washed several times with deionized water and ethanol, dried in a 65 °C oven for 15 h, taken out and placed in a muffle furnace, the air atmosphere was calcined at 500 °C for 12 h, and finally ZnFe2O4 photocatalytic material was obtained.

Embodiment 2

[0022] 100 mg of polyacrylic acid, add 1 mL of deionized water to ultrasonic dissolve, stir in 100 ml of deionized water sonication, then drop 500 μL of ammonia sonication for 30 min, weigh 200 mg of zinc nitrate added to the above solution, and then slowly add 300 ml of isopropanol to the solution. Weigh 200 mg of ferrous chloride tetrahydrate added to the above solution stirred for 10 h, the resulting mixed solution was centrifuged and separated (4000 rpm, 8min), the precipitate was washed several times with deionized water and ethanol, dried in a 65 °C oven for 12 h, taken out and placed in a muffle furnace, the air atmosphere was calcined at 500 °C for 18 h, and finally ZnFe2O4 photocatalytic material was obtained.

Embodiment 3

[0024]150 mg of polyacrylic acid, add 1 mL of deionized water to ultrasonic dissolution, stir to drop 100 ml of deionized water sonication, then drop 1000 μL of ammonia sonication for 30 min, weigh 250 mg of zinc nitrate added to the above solution, and then slowly add 400 ml of isopropanol to the solution. Weigh 250 mg of ferrous chloride chlorinated hydrate added to the above solution stirred for 12 h, the resulting mixed solution was centrifuged and separated (4500 rpm, 8min), the precipitation was washed several times with deionized water and ethanol, dried in a 65 °C oven for 16 h, removed and placed in a muffle furnace, the air atmosphere was calcined at 550 °C for 15 h, and finally ZnFe2O4 photocatalytic material was obtained.

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Abstract

This patent relates to a preparation method and application of a magnetic visible light heterogeneous Fenton catalyst ZnFe2O4 material. The obtained ZnFe2O4 photocatalyst material has a pomegranate structure. The nanosphere is assembled from many ultra-small ZnFe2O4 units. The unit particle size is less than 5 nm, and it has the characteristics of large specific surface area and adsorption capacity, which is conducive to the smooth transmission of electrons. The preparation method of the present invention is simple and the cost is low, and the prepared ZnFe2O4 photocatalyst material has the characteristics of being able to be repeatedly recovered and reused through magnetic separation under the premise of excellent Fenton photocatalytic ability. Fenton photocatalytic test results show that under visible light irradiation, ZnFe2O4 photocatalyst has excellent degradation performance and can be used for oxytetracycline (OTC), norfloxacin (NFX), tetracycline hydrochloride (TCH), rhodamine B (RhB) , methyl orange (MO) degrades and reduces Cr(Ⅵ).

Description

Technical field [0001] The present invention belongs to the field of water treatment technology, specifically relates to a pomegranate-like visible light Fenton catalyst ZnFe2O4 nanosphere preparation method and deep degradation of organic wastewater. Background [0002] Water is a precious resource of nature and also the source of human survival. Nowadays, with the rapid development of modern industry, the discharge of industrial wastewater is increasing, and a large part of it contains organic pollutants, which are difficult to be naturally degraded, resulting in increasing water pollution problems. At the same time of industrial development, its water demand is getting bigger and bigger, and the problem of water quality makes the contradiction between water shortage and economic development in China increasingly prominent, so wastewater treatment has become a major problem facing today's society. [0003] Since 1964, H. R. Eisehnonser has used Fenton reagents for the first tim...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/00B01J23/80C02F1/30C02F1/72C02F101/22C02F101/34C02F101/36C02F101/38
CPCC01G49/0063B01J23/80B01J35/0033B01J35/004C02F1/30C02F1/722C02F1/725C02F2305/10C02F2101/36C02F2101/38C02F2101/34C02F2101/40C02F2101/22C02F2305/026C01P2004/62C01P2004/32C01P2002/72C01P2004/04Y02W10/37
Inventor 陈哲冯万忠冯德奎陈峰赵子铭
Owner JILIN INST OF CHEM TECH
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