Composite film material based on metal-organic framework nano-sheet and graphene oxide, preparation method thereof, and application thereof in gas separation
A metal-organic framework and gas separation technology, applied in semi-permeable membrane separation, chemical instruments and methods, separation methods, etc., can solve problems affecting selectivity, scale and yield
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Embodiment 1
[0030] (1) Prepare graphene oxide solution (solution A)
[0031] Purchase the graphene oxide (analytical pure) product of Pioneer Nano Company, take graphene oxide and deionized water to prepare 0.1g L -1 The original concentration solution of graphene oxide. Place the prepared original graphene oxide solution in an ultrasonic disperser for ultrasonic dispersion, seal it and let it stand for later use.
[0032] (2) Preparation of copper oxide nanosheet solution (solution B)
[0033] Accurately weigh copper nitrate in beaker A with an electronic balance, add deionized water and stir to accelerate dissolution to make 2mmolL -1 ; Take another beaker B and prepare 1.6mmol L with deionized water -1 For ethanolamine solution, mix equal volumes of the solutions in beakers A and B. Put the cleaned and dried magnets into the mixed solution beaker along the wall of the cup, and cover with a layer of parafilm to prevent a large amount of water from evaporating. The sealed mixed solu...
Embodiment 2
[0042] Steps (1) to (3) are the same as in Example 1.
[0043] (4) Preparation of two-dimensional composite membranes by layer-by-layer method
[0044] The installation and leak testing of the suction filtration device are the same as in Example 1. Add 5mL of solutions A and B sequentially to the suction filtration device to complete 3 cycles. After completing the last cycle and waiting for complete draining, continue to add another layer of 5mL solution A to cap, and wait for complete draining. After the initial film formation is completed, 25mL solution C needs to be added to convert the copper oxide nanosheets doped with re-oxidized graphene into HKUST-1 to obtain a composite film HKUST-1@GO-3.
[0045] (5) Characterization of membrane
[0046] It was subjected to powder X-ray diffraction pattern test, scanning electron microscope, transmission electron microscope, atomic force microscope characterization and mixed gas separation test. The gas test results are shown in T...
Embodiment 3
[0048] Steps (1) to (3) are the same as in Example 1.
[0049] (4) Preparation of two-dimensional composite membranes by layer-by-layer method
[0050] The installation and leak testing of the suction filtration device are the same as in Example 1. Add 5mL of solutions A and B sequentially to the suction filtration device to complete 4 cycles. After completing the last cycle and waiting for complete draining, continue to add another layer of 5mL solution A to cap, and wait for complete draining. After the initial film formation is completed, 25mL solution C needs to be added to convert the copper oxide nanosheets doped with re-oxidized graphene into HKUST-1 to obtain a composite film HKUST-1@GO-4.
[0051] (5) Characterization of membrane
[0052] It was subjected to powder X-ray diffraction pattern test, scanning electron microscope, transmission electron microscope, atomic force microscope characterization and mixed gas separation test. The gas test results are shown in T...
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