Preparation method and application of a porous carbon@cobalt tetroxide nanocomposite material
A composite material and porous carbon technology, which is applied to electrolysis components, electrodes, electrolysis processes, etc., can solve the problems of complex preparation process and unsatisfactory catalytic effect, and achieve the effect of simple synthesis process, regular morphology and easy industrialization.
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Embodiment 1
[0025] Example 1 A preparation method of porous carbon@cobalt tetraoxide nano composite material
[0026] (1) Under electric stirring, dissolve 17.0 g of acetone and 2.4 mmol of dicyandiamide into a clear solution, add 0.60 g of cobalt nitrate dissolved in 8 g of water in water, cool in an ice bath for 10 minutes, and stir at 300 rpm The mixture of 22 mmol toluene diisocyanate and 8 g acetone was added dropwise at a constant rate. The temperature was raised to 30°C, and the polymerization reaction was kept for 3 h. The solid obtained was dried in an oven at 70°C to a constant weight to obtain porous Co (II)-Polyphenylurea coordination polymer;
[0027] (2) Place the Co(II)-polyphenylurea coordination polymer in a tube furnace, in an air atmosphere, at a heating rate of 3℃ / min, heat to 300℃, hold for 2.5 h, and then heat it at 2℃ / min The cooling rate is cooled to room temperature to obtain porous carbon@Co 3 O 4 Nanocomposite materials.
Embodiment 2
[0028] Example 2 A preparation method of porous carbon@cobalt tetraoxide nanocomposite material
[0029] (1) Under electric stirring, dissolve 17.0 g of acetone and 3.0 mmol of dicyandiamide into a clear solution, add 1.20 g of cobalt nitrate dissolved in 12 g of water in an aqueous solution, cool in an ice bath for 10 minutes, and stir at 300 rpm , The blend of 24 mmol toluene diisocyanate and 10g acetone was added dropwise at a constant rate, the temperature was raised to 30°C, and the polymerization reaction was kept for 3 hours. The solid obtained was dried in an oven at 70°C to a constant weight to obtain porous Co(II )-Polyphenylurea coordination polymer;
[0030] (2) Place the Co(II)-polyphenylurea coordination polymer in a tube furnace, in an air atmosphere, at a heating rate of 5℃ / min, heat to 500℃, hold for 1.5 h, and then heat it at 2℃ / min The cooling rate is cooled to room temperature to prepare porous carbon@cobalt tetraoxide nanocomposite.
Embodiment 3
[0031] Example 3 A preparation method of porous carbon@cobalt tetraoxide nano composite material
[0032] (1) Under electric stirring, dissolve 17.0 g of acetone and 2.8 mmol of dicyandiamide into a clear solution, add 0.90 g of cobalt nitrate dissolved in 10 g of water in water, cool in an ice bath for 10 minutes, and stir at 300 rpm The mixture of 23 mmol toluene diisocyanate and 9 g acetone was added dropwise at a constant rate, the temperature was raised to 30°C, and the polymerization reaction was kept for 3 h. The obtained solid was dried in an oven at 70°C to a constant weight to obtain porous Co (II)-Polyphenylurea coordination polymer;
[0033] (2) Place the Co(II)-polyphenylurea coordination polymer in a tube furnace, in an air atmosphere, at a heating rate of 4 ℃ / min, heat to 400℃, hold for 2 h, and then heat it at 2 ℃ / min The cooling rate is cooled to room temperature, and the porous carbon@cobalt tetraoxide nanocomposite material is prepared.
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