Hierarchical porous co-n-c composite material and its preparation method and application
A composite material and multi-level pore technology, applied in the field of porous materials, can solve the problems of cumbersome preparation process and limit the industrial application of such materials, and achieve the effects of simple and fast operation, excellent catalytic performance, and simple preparation method.
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Embodiment 1
[0037] This embodiment provides a method for preparing a hierarchical porous Co-N-C composite material by in-situ confinement pyrolysis of an ionic liquid, including the following steps:
[0038] (1) 2-methylimidazole (80 mmol) was added to anhydrous methanol (75 mL), and dissolved by ultrasonic for 15 min to obtain organic ligand solution A; 3 ) 2 ·6H 2 O(20mmol) and [Bmim][CoCl 3 ] (1mmol) was dissolved in anhydrous methanol (150mL) to obtain the mixed solution B of metal salt and ionic liquid;
[0039] (2) Add the solution B in step (1) to the organic ligand solution A to obtain a mixed solution, stir at 25°C for 1 h, transfer the above solution to the reaction kettle, and carry out a solvothermal reaction. The solvothermal heating rate is 1°C / min, heated to 120 °C for 4 h, then centrifuged, washed with anhydrous methanol, and vacuum dried at 70 °C to obtain [Bmim][CoCl3 ]@ZIF-8 material;
[0040] (3) Weigh the [Bmim][CoCl obtained in step (2) 3 ]@ZIF-8 material (0.1g...
Embodiment 2
[0042] This embodiment provides a method for preparing a hierarchical porous Co-N-C composite material by in-situ confinement pyrolysis of an ionic liquid, including the following steps:
[0043] (1) 2-methylimidazole (80 mmol) was added to anhydrous methanol (75 mL), and dissolved by ultrasonic for 15 min to obtain organic ligand solution A; 3 ) 2 ·6H 2 O(20mmol) and [Bmim][CoCl 3 ] (0.5mmol) was dissolved in anhydrous methanol (150mL) to obtain the mixed solution B of metal salt and ionic liquid;
[0044] (2) Add the solution B in step (1) to the organic ligand solution A to obtain a mixed solution, stir at 25°C for 1 h, transfer the above solution to the reaction kettle, and carry out a solvothermal reaction. The solvothermal heating rate is 1°C / min, heated to 120 °C for 4 h, and then centrifuged, washed with anhydrous methanol, and vacuum dried at 70 °C to obtain [Bmim][CoCl 3 ]@ZIF-8 material;
[0045] (3) Weigh the [Bmim][CoCl obtained in step (2) 3 ]@ZIF-8 materi...
Embodiment 3
[0047] This embodiment provides a method for preparing a hierarchical porous Co-N-C composite material by in-situ confinement pyrolysis of an ionic liquid, including the following steps:
[0048] (1) 2-methylimidazole (80 mmol) was added to anhydrous methanol (75 mL), and dissolved by ultrasonic for 15 min to obtain organic ligand solution A; 3 ) 2 ·6H 2 O(20mmol) and [Bmim][CoCl 3 ] (0.25mmol) was dissolved in anhydrous methanol (150mL) to obtain the mixed solution B of metal salt and ionic liquid;
[0049] (2) Add the solution B in step (1) to the organic ligand solution A to obtain a mixed solution, stir at 25°C for 1 h, transfer the above solution to the reaction kettle, and carry out a solvothermal reaction. The solvothermal heating rate is 1°C / min, heated to 120 °C for 4 h, then centrifuged, washed with anhydrous methanol, and vacuum dried at 80 °C to obtain [Bmim][CoCl 3 ]@ZIF-8 material;
[0050] (3) Weigh the [Bmim][CoCl obtained in step (2) 3 ]@ZIF-8 material ...
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