Method for performing induced synthesis on MOFs (metal-organic frameworks) membrane by implanting homologous metal oxide particles into surface of macroporous carrier by virtue of swabbing process
A macroporous carrier and oxide technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of increasing the preparation of dense and defect-free membranes, and achieve scale-up, good stability, and process simple effect
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[0029] Example 1 Preparation of ZIF-8 film by wiping ZnO powder on macroporous alumina ceramic carrier
[0030] The macroporous alumina ceramic tube uses 1mol / L NaOH and 1mol / L HNO in sequence 3 Treated with deionized water, calcined at 500℃ for later use;
[0031] Load the commercially available 50nm ZnO powder on the surface of the ceramic carrier by hand rubbing;
[0032] Place the ceramic tube coated with the ZnO layer in a 0.5 mol / L methanol solution of 2-methylimidazole, and maintain the ZnO layer at 50°C for 2 hours;
[0033] Dissolve 0.47g zinc chloride, 0.41g 2-methylimidazole, and 0.25g sodium formate in 70mL anhydrous methanol, place the ceramic tube pretreated with ZnO powder vertically into a 100mL PTFE kettle, slowly Pour the film-forming liquid into the kettle. Place the polytetrafluoroethylene kettle in an oven at 100°C for 5 hours. After natural cooling, the ceramic tube after the long film is rinsed with methanol and dried at room temperature for later use. The ob...
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[0035] Example 2 Preparation of ZIF-7 film by wiping ZnO powder on macroporous alumina ceramic carrier
[0036] The macroporous alumina ceramic tube uses 1mol / L NaOH and 1mol / L HNO in sequence 3 Treated with deionized water, calcined at 500℃ for later use;
[0037] Load the commercially available 50nm ZnO powder on the surface of the ceramic carrier by hand rubbing;
[0038] Place the ceramic tube coated with the ZnO layer in a 0.5mol / L benzimidazole N,N-dimethylformamide solution, and keep the ZnO layer at 50°C for 20 minutes;
[0039] Dissolve 1.34g zinc nitrate and 0.68g benzimidazole into 70mL N,N-dimethylformamide, place the pretreated ceramic tube coated with ZnO powder vertically into a 100mL PTFE kettle and pour slowly The film-forming liquid is in the kettle. Place the polytetrafluoroethylene kettle in an oven at 100°C for 12 hours. After natural cooling, the ceramic tube after the long film is rinsed with methanol and dried at room temperature for later use. The obtained ...
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