Application of graphene covalently grafted aminobenzene terpyridyl-iron complex in degradation of organic pollutants in Fenton system

A technology for organic pollutants and terpyridine, applied in water pollutants, organic compounds/hydrides/coordination complex catalysts, organic chemistry, etc., can solve the problem of increasing separation steps, secondary pollution, and no good disposal methods for iron sludge and other problems, achieve good stability, high degradation efficiency, and overcome the effect of iron ion loss

Active Publication Date: 2020-08-07
丁道其
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The most important point is that the iron salt used as a catalyst in the reaction will form iron sludge after the reaction, which requires

Method used

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  • Application of graphene covalently grafted aminobenzene terpyridyl-iron complex in degradation of organic pollutants in Fenton system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Disperse graphene oxide (GO) in dichloromethane, ultrasonically disperse for 0.5h, add thionyl chloride 5 times the mass of GO dropwise under ultrasonic-assisted conditions, and heat and reflux with Ar gas protection, the reaction temperature 60°C, reaction time 20h, rotary evaporation to remove excess reactants and solvents to obtain acid-chlorinated graphene oxide;

[0023] (2) Dissolve ferrous sulfate in 200ml of water, stir to dissolve, add aminophenyl terpyridine ligand, the molar ratio of ferrous sulfate to ligand is 1:1, stir magnetically for 2 hours to obtain a homogeneous mixture, transfer the above mixture into In a stainless steel reaction kettle lined with polytetrafluoroethylene, the temperature was raised to 130 ° C for 36 hours, and after the reaction was completed, it was naturally cooled to room temperature, filtered, and washed to obtain the aminobenzene terpyridine-iron complex;

[0024] (3) Dissolving the aminobenzene terpyridine-iron complex pre...

Embodiment 2

[0026] (1) Disperse graphene oxide (GO) in dichloromethane, ultrasonically disperse for 1 h, add thionyl chloride 7 times the mass of GO dropwise under ultrasonic-assisted conditions, and heat and reflux with Ar gas protection, the reaction temperature is 60 ℃, reaction time 20h, rotary evaporation to remove excess reactants and solvents, to obtain acid-chlorinated graphene oxide;

[0027] (2) Dissolve ferrous sulfate in 200ml of water, stir to dissolve, add aminophenyl terpyridine ligand, the molar ratio of ferrous sulfate to ligand is 1:1, stir magnetically for 2 hours to obtain a homogeneous mixture, transfer the above mixture into In a stainless steel reaction kettle lined with polytetrafluoroethylene, the temperature was raised to 130 ° C for 36 hours, and after the reaction was completed, it was naturally cooled to room temperature, filtered, and washed to obtain the aminobenzene terpyridine-iron complex;

[0028] (3) Dissolving the aminobenzene terpyridine-iron complex ...

Embodiment 3

[0030] (1) Disperse graphene oxide (GO) in dichloromethane, ultrasonically disperse for 1 h, add thionyl chloride 10 times the mass of GO dropwise under ultrasonic-assisted conditions, and heat and reflux with Ar gas protection, the reaction temperature is 60 ℃, reaction time 20h, rotary evaporation to remove excess reactants and solvents, to obtain acid-chlorinated graphene oxide;

[0031](2) Dissolve ferrous sulfate in 200ml of water, stir to dissolve, add aminophenyl terpyridine ligand, the molar ratio of ferrous sulfate to ligand is 1:1, stir magnetically for 2 hours to obtain a homogeneous mixture, transfer the above mixture into In a stainless steel reaction kettle lined with polytetrafluoroethylene, the temperature was raised to 130 ° C for 36 hours, and after the reaction was completed, it was naturally cooled to room temperature, filtered, and washed to obtain the aminobenzene terpyridine-iron complex;

[0032] (3) Dissolving the aminobenzene terpyridine-iron complex ...

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Abstract

The invention relates to an application of a graphene covalently grafted aminobenzene terpyridyl-iron complex in degradation of organic pollutants in a Fenton system, and belongs to the technical field of advanced oxidation water treatment. An iron complex is used as a Fenton reagent, graphene is used as a carrier of the Fenton reagent, and the graphene is connected with the iron complex through amido bonds, so that iron ions can be firmly immobilized on the surface of the graphene, and the problems of iron ion loss and secondary pollution are effectively solved. Meanwhile, the high electron transfer efficiency and the large specific surface area of the graphene can cooperate with the Fenton reagent to play a higher role in degrading organic pollutants. When the graphene covalently graftedaminobenzene terpyridyl-iron complex disclosed by the invention is used for degrading rhodamine B in the Fenton system; under the condition that the pH value is 4, the degradation rate of 100 mg/L rhodamine B is close to 100% within 60 min, the degradation rate is not decreased after five times of circulation, high degradation efficiency and good stability are shown, and good application prospects are achieved.

Description

technical field [0001] The invention relates to the application of a graphene covalently grafted aminobenzene terpyridine-iron complex in degrading organic pollutants in a Fenton system, and belongs to the technical field of advanced oxidation water treatment. Background technique [0002] Among the technologies for deep oxidation treatment of organic wastewater, Fenton oxidation is the most promising wastewater treatment technology for industrial application. On the one hand, compared with other deep oxidation technologies, this method has the characteristics of wide application range, strong anti-interference ability, etc., and can quickly degrade and mineralize organic pollutants; on the other hand, this system uses environmentally friendly The oxidizing agent - hydrogen peroxide, its final decomposition product is O 2 and H 2 O, in line with the concept of "green oxidation". [0003] The essence of the Fenton reaction is Fe 2+ Under strong acid conditions and H 2 o ...

Claims

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Application Information

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IPC IPC(8): C02F1/72C07D213/38B01J31/22C02F101/30
CPCC02F1/722C02F1/725C07D213/38B01J31/1815C02F2101/308C02F2305/026B01J2531/842
Inventor 吕亮亮
Owner 丁道其
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