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Dodecahedral monatomic iron Fenton catalyst, and preparation and application thereof

A dodecahedron, iron catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as harmless and difficult to achieve antibiotic degradation

Pending Publication Date: 2021-07-06
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, physical methods only change the phase of antibiotic pollutants and cannot decompose them harmlessly; biochemical methods take a long time, are often used to deal with low-concentration pollutants, and are difficult to achieve the degradation of antibiotics

Method used

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  • Dodecahedral monatomic iron Fenton catalyst, and preparation and application thereof
  • Dodecahedral monatomic iron Fenton catalyst, and preparation and application thereof
  • Dodecahedral monatomic iron Fenton catalyst, and preparation and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Step 1: Iron acetylacetonate, zinc nitrate hexahydrate, and dimethylimidazole were dissolved in 60 mL of methanol, wherein the molar concentration of dimethylimidazole was 0.4 mol / L; the molar concentration of zinc nitrate hexahydrate was 0.1 mol / L; The molar concentration of iron acetylacetonate was 0.01mol / L, sonicated for 15min, and stirred for 1h to obtain a brown-red solution.

[0028] Step 2: Transfer the above-mentioned brown-red solution to a 100 mL reactor and put it into an oven for solvothermal reaction for 4 hours at a reaction temperature of 120°C.

[0029] Step 3: The solution obtained from the above reaction was centrifuged, washed three times with methanol and N, N dimethylformamide, and dried in vacuum at 60°C for 12 hours to obtain the MOFs-loaded precursor material.

[0030] Step 4: Grind the obtained precursor into powder and put it into a tube furnace. Under the protection of argon atmosphere, after calcination at a high temperature of 930°C for 3 h...

Embodiment 2

[0035] Step 1: Iron acetylacetonate, zinc nitrate hexahydrate, and dimethylimidazole were dissolved in 60 mL of methanol, wherein the molar concentration of dimethylimidazole was 0.4 mol / L; the molar concentration of zinc nitrate hexahydrate was 0.1 mol / L; The molar concentration of iron acetylacetonate was 0.01 mol / L, sonicated for 15 minutes, and stirred for 1 hour to obtain a brown-yellow solution.

[0036] Step 2: Transfer the above-mentioned brown-red solution into a 100mL reactor and put it into an oven for solvothermal reaction for 4 hours at a reaction temperature of 120°C.

[0037] Step 3: The solution obtained from the above reaction was centrifuged, washed three times with methanol and N, N dimethylformamide, and dried in vacuum at 60°C for 12 hours to obtain the MOFs-loaded precursor material.

[0038] Step 4: Grind the obtained precursor into powder and put it into a tube furnace. Under the protection of argon atmosphere, calcinate at a high temperature of 900°C f...

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Abstract

The invention discloses a preparation method and an application of a dodecahedron monatomic iron Fenton catalyst. The preparation method comprises the following steps: dissolving ferric acetylacetonate, zinc nitrate hexahydrate and dimethylimidazole in methanol, ultrasonically dissolving and uniformly stirring, transferring the obtained reaction mixture into a reaction kettle, and preparing an MOFs-loaded iron-based material precursor through solvothermal reaction; and calcining at a high temperature in an argon atmosphere to obtain the dodecahedral monatomic iron catalyst with a large specific surface area, and applying the dodecahedral monatomic iron catalyst to a heterogeneous Fenton reaction to realize efficient degradation of sulfonamide antibiotics. The catalyst has the characteristics of good recycling performance, wide pH application range (3-8), simple preparation method and the like, has higher application value, and can be used for treating antibiotic wastewater.

Description

technical field [0001] The invention relates to a nanoscale single-atom iron catalyst and its preparation method and application. The catalyst can efficiently remove sulfonamide antibiotics in wastewater by activating hydrogen peroxide, and belongs to the technical field of environmental protection and treatment. Background technique [0002] Antibiotic residues in aquatic environments have attracted widespread attention because they may cause antibiotic-resistant bacteria (ARB) and antibiotic resistance genes (ARG), which are considered to be new types of aquatic pollutants. Sulfonamides are a class of antibiotics widely used worldwide due to their low price and stable performance. However, the treatment of sulfonamide antibiotic pollutants is a major challenge for existing water treatment technologies, and the removal efficiency is low. Compared with other sulfonamide antibiotics, sulfadiazine has a high detection frequency (nearly 100%) and high concentration (up to 216n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/72C02F101/38
CPCB01J27/24C02F1/722C02F1/725C02F2101/40C02F2305/026B01J35/39
Inventor 孔令涛张开胜杨武刘锦淮
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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