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
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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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