Preparation and application of a mof material
A technology of MOF and heavy metal ions, which is applied in other chemical processes, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve the problems of long loading time of basic groups, low loading capacity, complicated preparation process, etc. Achieve the effects of shortening the preparation time, improving production efficiency, and good adsorption performance
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Embodiment 1
[0038] In this example, an in-situ solvothermal method was used to synthesize an unactivated MOF material (MIL-121) with carboxylic acid functional groups, and then the prepared MOF material was subjected to a high-temperature activation treatment at 300° C. for 5 h.
[0039] Specific steps are as follows:
[0040] Step 1: The preparation method of MIL-121 material is as follows: Weigh 2.4g of aluminum nitrate nonahydrate and 0.8g of pyromellitic acid respectively, add them into 10mL of ultrapure aqueous solution, stir evenly, and put them in an oven at 210°C for 24h. The obtained product was washed with ultrapure water to about pH ≈ 4, and dried under vacuum at 80°C overnight to obtain a white MIL-121 powder;
[0041] Step 2: The activation method of the MIL-121 material is as follows: put the prepared MIL-121 white powder directly into the muffle furnace for calcination, the heating rate is 2°C / min, the calcination temperature is 300°C, the calcination time is 5h, and cooled...
Embodiment 2
[0051] The preparation steps of MIL-121-300°C in this example are the same as those in Example 1.
[0052] The only difference is that the thermally renewable MOF material (MIL-121-300°C) prepared in this example is used to treat the wastewater containing copper ions, and adjust the pH value of the influent to 10; specific steps as follows:
[0053] (1) Take 2 g of the prepared thermally regenerable MOF material (MIL-121-300°C) and put it into a jacketed glass adsorption column. 2 The flow rate of h flows through the adsorption column.
[0054] (2) After the adsorption reaches saturation for 24 hours, stop the water inflow, and then take out the thermally regenerable MOF material (MIL-121-300°C) of the adsorption column and soak it in hot water at 90°C for 8 hours.
[0055] After testing, it was found that the removal rate of copper ions in water reached 95% by thermally regenerable MOF materials (MIL-121-300°C) after the wastewater was adsorbed.
[0056] The thermally rene...
Embodiment 3
[0058] The present embodiment is basically the same as embodiment 1, and its difference is only in:
[0059] In this example, an in-situ solvothermal method was used to synthesize an unactivated MOF material (MIL-121) with carboxylic acid functional groups, and then the prepared MOF material was subjected to a high-temperature activation treatment at 180° C. for 3 h. specific:
[0060] Step 1: The preparation steps of MIL-121 are as follows: Weigh 2.4g of aluminum nitrate nonahydrate and 0.8g of pyromellitic acid respectively, add them into 10ml of ultrapure aqueous solution, stir evenly, and put them in an oven at 180°C for 36h. The obtained product was washed with ultrapure water to about pH ≈ 4, and dried under vacuum at 80° C. overnight to obtain a white powder of MIL-121.
[0061] Step 2: The activation steps of the MOF material in this example are as follows: put the prepared MIL-121 white powder directly into the muffle furnace for calcination, the heating rate is 2°C / ...
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