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A kind of copper-manganese-doped iron metal organic framework material and preparation method thereof, and method for catalytically activating persulfate to treat organic wastewater

An organic framework and persulfate technology, which is applied in organic compound/hydride/coordination complex catalysts, oxidized water/sewage treatment, water/sewage treatment, etc., can solve the problem of limited degradation efficiency improvement, poor material stability, environmental Secondary pollution and other problems, to achieve the effect of short catalytic time, good durability and wide applicability

Active Publication Date: 2022-07-26
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem that the degradation efficiency of the existing iron-copper bimetallic MOFs material is limited, and the material stability is poor, the structure is easy to collapse, and more metal ions will be precipitated, which may cause secondary pollution to the environment. Iron-based trimetallic organic framework material that effectively solves the above problems, its preparation method, and its application to activated persulfate treatment of organic wastewater

Method used

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  • A kind of copper-manganese-doped iron metal organic framework material and preparation method thereof, and method for catalytically activating persulfate to treat organic wastewater
  • A kind of copper-manganese-doped iron metal organic framework material and preparation method thereof, and method for catalytically activating persulfate to treat organic wastewater
  • A kind of copper-manganese-doped iron metal organic framework material and preparation method thereof, and method for catalytically activating persulfate to treat organic wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] This example compares the removal rate of SMZ by using copper-manganese-doped iron metal organic framework materials to activate sodium persulfate and using copper-doped iron metal organic framework materials alone, iron metal organic framework materials alone, and sodium persulfate alone.

[0040] (1)NH 2 -Preparation of MIL (Fe, Cu, Mn): Diaminoterephthalic acid (5mM), FeCl 2 ·4H 2 O, CuSO 4 ·5H 2 O and MnCl 2 ·4H 2 O (total 5mM of the three) was added to 40ml of N-dimethylformamide, then 2mL of methanol and 1mL of hydrofluoric acid were added, and the mixed solution was transferred to a 100ml polytetrafluoroethylene-lined reactor, heated to 150°C for reaction 12h. The synthesis conditions were controlled to the following 3 types: FeCl 2 ·4H 2 O, CuSO 4 ·5H 2 O and MnCl 2 ·4H 2 The molar ratios of O and the three are 1:1:1, 4:1:0, 5:0:0, respectively named NH 2 -MIL(Fe,Cu,Mn),NH 2 -MIL(Fe,Cu), NH 2-MIL(Fe). After the reaction is over, transfer the reac...

Embodiment 2

[0047] This example compares the stability of copper-manganese-doped iron metal organic framework materials, copper-doped iron metal organic framework materials, and iron metal organic framework materials.

[0048] (1)NH 2 -MIL (Fe, Cu, Mn), NH 2 -MIL(Fe,Cu), NH 2 The preparation method of -MIL(Fe) is the same as the step (1) in Example 1;

[0049] (2) prepare the SMZ solution of 0.0197mmol / L for subsequent use;

[0050] (3) adopt the conical flask as the reactor, add 2.961mmol Na in the reactor 2 S 2 O 8 and 0.0197mmol / LSMZ100 mL (nNa 2 S 2 O 8 / nSMZ=150), at the same time, 0.04g of material NH was added to the reactor 2 -MIL(Fe,Cu,Mn),NH 2 -MIL(Fe,Cu), NH 2 -MIL(Fe), place the Erlenmeyer flask in a shaker at 180 rpm, carry out the reaction at room temperature (25°C), sample and analyze at fixed points, and characterize the stability of the material by measuring the concentration of metal ions in the degradation reaction system.

[0051] The stability of different...

Embodiment 3

[0056] This example compares the effect of different pH values ​​on NH 2 -The effect of MIL(Fe, Cu, Mn) catalytic activation of PS to degrade SMZ.

[0057] (1)NH 2 -Preparation of MIL (Fe, Cu, Mn): Diaminoterephthalic acid (5mM), FeCl 2 ·4H 2 O, CuSO 4 ·5H 2 O and MnCl 2 ·4H 2 O (total 5mM of the three) was added to 40ml of N-dimethylformamide, then 2mL of methanol and 1mL of hydrofluoric acid were added, and the mixed solution was transferred to a 100ml polytetrafluoroethylene-lined reactor, heated to 150°C for reaction 12h. Control FeCl 2 ·4H 2 O, CuSO 4 ·5H 2 O and MnCl 2 ·4H 2 The molar ratio of O is 1:1:1, and the material is named NH 2 -MIL (Fe, Cu, Mn). After the reaction is over, transfer the reacted mixture to a centrifuge tube, centrifuge at 10,000 rpm for 10 min to separate the solid; wash it with methanol at least 3 times, put the obtained solid into a vacuum drying box, and dry it at 60 °C for 12 h to obtain a powder. .

[0058] (2) prepare the SM...

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Abstract

The invention discloses a copper-manganese-doped iron metal organic framework material, a preparation method thereof, and a method for catalyzing and activating persulfate for treating organic wastewater, belonging to the technical field of water pollution control. In the present invention, diaminoterephthalic acid, iron salt, copper salt and manganese salt are added to N-dimethylformamide to obtain a mixed solution, then methanol and hydrofluoric acid are added for heating reaction; after the obtained reacted mixture is cooled, Centrifugal separation, washing and drying, the obtained powder is the copper-manganese-doped iron metal organic framework material. The catalyst of the invention has high catalytic activity, short catalytic time, good durability, convenient operation, and can have high degradation effect in a wide pH value range, and the activation effect is still very good after repeated utilization. Iron-copper bimetallic organic framework materials have higher catalytic efficiency and higher stability, and are more environmentally friendly materials, which have great application prospects in the degradation of organic pollutants in water.

Description

technical field [0001] The invention belongs to the technical field of water pollution control, and in particular relates to a copper-manganese-doped iron metal organic framework material, a preparation method thereof, and a method for catalyzing and activating persulfate for treating organic wastewater. Background technique [0002] Water pollution is one of the serious crises faced by human beings today, and human beings are constantly developing in terms of water pollution control. However, the treatment of toxic and harmful organic pollutants has always been a technical difficulty in water treatment. Advanced oxidation technology based on sulfate radicals (SO4-·) has attracted more and more attention and attention of researchers in the field of degradation of persistent organic pollutants due to its high efficiency and cleanliness in degrading pollutants. In the existing reports, photoactivation, thermal activation, ultrasound and metal ion activation are generally used...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/22C02F1/72C02F101/30C02F101/38
CPCB01J31/2243C02F1/722C02F1/725B01J2531/16B01J2531/72B01J2531/842C02F2101/30C02F2101/40
Inventor 马邕文赵晗
Owner SOUTH CHINA UNIV OF TECH
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