Magnetic composite adsorption material based on Fe3O4-Co-based MOFs, and preparation method of magnetic composite adsorption material
A composite adsorption material, fe3o4-co technology, applied in adsorption water/sewage treatment, water/sludge/sewage treatment, flocculation/sedimentation water/sewage treatment, etc., which can solve problems such as difficulty in recycling adsorption materials and secondary pollution , to avoid secondary pollution, reduce adsorption costs, and improve utilization
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[0026] Co-based MOFs material preparation method comprises the following steps:
[0027] (1) Add an appropriate amount of absolute ethanol to the reaction flask, add 2-nitroisophthalic acid and stir to dissolve, add an appropriate amount of distilled water and sodium hydroxide, the volume ratio of absolute ethanol and distilled water is 1:1.5-2, and The reaction bottle was placed in a constant temperature water bath and heated to 70-80°C, refluxed for 2-4h, then added glucose (C 6 h 12 o 6 ), the mass ratio of 2-nitroisophthalic acid, sodium hydroxide and glucose is 1:2-2.5:5-6, the reaction temperature is reduced to 40-50°C, the reaction is stirred at a constant speed for 20-25h, and the reaction is passed by TLC The reaction process was observed by thin-layer chromatography. After the reaction of 2-nitroisophthalic acid was complete, hydrochloric acid solution was added dropwise to the reaction flask, the pH of the solution was adjusted to 4-5, and the mixture was stirred ...
Embodiment 1
[0034] (1) Preparation of organic ligand 2,2',6,6'-azobenzene tetracarboxylate compound 1: add an appropriate amount of absolute ethanol to the reaction flask, add 2-nitroisophthalic acid and stir to dissolve, add an appropriate amount of distilled water and sodium hydroxide, absolute ethanol and distilled water volume ratio is 1:1.5, the reaction bottle is placed in a constant temperature water bath and heated to 70 ° C, reflux reaction 2h, then add glucose (C 6 h 12 o 6 ), the mass ratio of 2-nitroisophthalic acid, sodium hydroxide and glucose is 1:2:5, the reaction temperature is down to 40°C, and the reaction is stirred at a constant speed for 20h, and the reaction is observed by TLC thin layer chromatography. , when the reaction of 2-nitroisophthalic acid is complete, add hydrochloric acid solution dropwise to the reaction flask, adjust the pH of the solution to 5, stir at a constant speed for 2 hours, add an appropriate amount of distilled water and ethyl acetate to the...
Embodiment 2
[0039] (1) Preparation of organic ligand 2,2',6,6'-azobenzene tetracarboxylate compound 2: add an appropriate amount of absolute ethanol to the reaction flask, add 2-nitroisophthalic acid and stir to dissolve, add an appropriate amount of Distilled water and sodium hydroxide, the volume ratio of absolute ethanol and distilled water is 1:1.6, the reaction bottle is placed in a constant temperature water bath and heated to 70 ° C, reflux for 3 hours, then add glucose (C 6 h 12 o 6 ), the mass ratio of 2-nitroisophthalic acid, sodium hydroxide and glucose is 1:2:5, the reaction temperature is down to 40°C, and the reaction is stirred at a constant speed for 20h, and the reaction is observed by TLC thin layer chromatography. , when the reaction of 2-nitroisophthalic acid is complete, add hydrochloric acid solution dropwise to the reaction flask, adjust the pH of the solution to 4, stir at a constant speed for 2 hours, add an appropriate amount of distilled water and ethyl acetate...
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