Preparation method and application of composite material based on bi-metal MOF nanometer crystals
A technology of composite materials and nanocrystals, applied in the field of nanocomposites and electrocatalysis, can solve the problems of reduced reaction pressure and difficulty in activation, and achieve the effects of high preparation efficiency, increased activity and high yield
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Embodiment 1
[0033] Embodiment 1 A kind of preparation method based on bimetallic MOF nanocrystalline composite material
[0034] (1) Preparation of CoCu-MOF nanocrystals
[0035] Co-dissolve 0.75 mmol of copper nitrate and 0.75 mmol of cobalt nitrate in 4 mL of water, and continue to add 0.8 g of polyvinylpyrrolidone to obtain a blue-purple clear copper nitrate-cobalt nitrate mixture;
[0036] Dissolve 1 mmol of 2,6-pyridinedicarboxylic acid and 2.0 mmol of sodium hydroxide in 4 mL of water to obtain a clear 2,6-pyridinedicarboxylate solution;
[0037] Add the 2,6-pyridinedicarboxylate solution to the copper nitrate-cobalt nitrate mixture, let it stand at room temperature for 2 hours, then filter it with suction and wash it with water for 3 times to prepare bimetallic MOF nanocrystals, that is, CoCu-MOF nanocrystals. crystal;
[0038] (2) Oxidation-pyrolysis of CoCu-MOF nanocrystals
[0039] The CoCu-MOF nanocrystals were placed in a tube furnace for oxidation-pyrolysis in an air atmos...
Embodiment 2
[0042] Embodiment 2 A kind of preparation method based on bimetallic MOF nanocrystalline composite material
[0043] (1) Preparation of CoCu-MOF nanocrystals
[0044] Co-dissolve 0.825 mmol of copper nitrate and 1.375 mmol of cobalt nitrate in 6 mL of water, and continue to add 0.85 g of polyvinylpyrrolidone to obtain a blue-purple clear copper nitrate-cobalt nitrate mixture;
[0045] Dissolve 1 mmol of 2,6-pyridinedicarboxylic acid and 2.3 mmol of sodium hydroxide in 6 mL of water to obtain a clear 2,6-pyridinedicarboxylate solution;
[0046] Add the 2,6-pyridinedicarboxylate solution to the copper nitrate-cobalt nitrate mixture, let it stand at room temperature for 2 hours, then filter it with suction and wash it with water for 3 times to prepare bimetallic MOF nanocrystals, that is, CoCu-MOF nanocrystals. crystal;
[0047] (2) Oxidation-pyrolysis of CoCu-MOF nanocrystals
[0048] The CoCu-MOF nanocrystals were placed in a tube furnace for oxidation-pyrolysis in an air at...
Embodiment 3
[0050] Embodiment 3 A kind of preparation method based on bimetallic MOF nanocrystalline composite material
[0051] (1) Preparation of CoCu-MOF nanocrystals
[0052] Co-dissolve 0.3 mmol of copper nitrate and 2.7 mmol of cobalt nitrate in 8 mL of water, and continue to add 0.9 g of polyvinylpyrrolidone to obtain a blue-purple clear copper nitrate-cobalt nitrate mixture;
[0053] Dissolve 1 mmol of 2,6-pyridinedicarboxylic acid and 2.5 mmol of sodium hydroxide in 8 mL of water to obtain a clear 2,6-pyridinedicarboxylate solution;
[0054] Add the 2,6-pyridinedicarboxylate solution to the copper nitrate-cobalt nitrate mixture, let it stand at room temperature for 2 hours, then filter it with suction and wash it with water for 3 times to prepare bimetallic MOF nanocrystals, that is, CoCu-MOF nanocrystals. crystal;
[0055] (2) Oxidation-pyrolysis of CoCu-MOF nanocrystals
[0056] The CoCu-MOF nanocrystals were placed in a tube furnace for oxidation-pyrolysis in an air atmosph...
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