A preparation method of millimeter-scale hierarchical porous carbon spheres
A multi-level pore, millimeter-scale technology, applied in the preparation/purification of carbon, can solve the problems of easy generation of environmental waste, difficult industrialization and application, difficult pore structure regulation, etc., and achieves easy industrial expansion of production and simple equipment requirements. , the effect of low cost
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Embodiment 1
[0029] In the first step, accurately weigh 2.4g PVDF and 0.3g PVP, place them in a conical flask, add 12.5mL N,N-dimethylformamide, and stir mechanically at 60°C until dissolved. In the second step, add 0.45g of phenolic resin and continue to stir until it dissolves evenly. In the third step, take 5mL of the above solution with a syringe and place it on the syringe pump, adjust the speed of the syringe pump to 0.5mL / min, squeeze out the droplet to 500mL of 5% volume isopropanol-95% volume deionized Phase separation and gelation in water. In the fourth step, after 24 hours, the spherical polymer-based precursor is taken out and dried at room temperature. After drying, put it under a nitrogen atmosphere, raise the temperature to 900°C at a rate of 1°C / min, keep it for 3 hours, then cool it down to room temperature naturally, and take out the sample as a millimeter-scale hierarchical porous carbon sphere. The obtained millimeter-scale hierarchical porous carbon spheres have a p...
Embodiment 2
[0032] Step 1: Accurately weigh 2.4g PES and 0.6g PVP, place them in a conical flask, add 12.2mL N,N-dimethylformamide, stir mechanically at 60°C until dissolved. In the second step, add 0.45g of phenolic resin and continue to stir until it dissolves evenly. In the third step, take 5mL of the above solution with a syringe and place it on the syringe pump, adjust the speed of the syringe pump to 0.8mL / min, squeeze out the droplet to 500mL of 5% volume isopropanol-95% volume deionized Phase separation and gelation in water. In the fourth step, after 12 hours, the spherical polymer-based precursor is taken out and dried at room temperature. After drying, put it under a nitrogen atmosphere, raise the temperature to 600°C at a rate of 1°C / min, keep it for 3 hours, and then cool it down to room temperature naturally, and take out the sample as a millimeter-scale hierarchical porous carbon sphere. The obtained millimeter-scale hierarchical porous carbon spheres have a particle size...
Embodiment 3
[0034] In the first step, accurately weigh 2.4g PVDF and 0.3g PVP, place them in a conical flask, add 12.5mL N,N-dimethylformamide, and stir mechanically at 60°C until dissolved. In the second step, add 0.45g of phenolic resin and continue to stir until it dissolves evenly. In the third step, take 5mL of the above solution with a syringe and place it on the syringe pump, adjust the speed of the syringe pump to 1.0mL / min, and squeeze out the droplet to the 500mL 25% volume of isopropanol-75% volume of the solution directly below the needle of the syringe. Phase separation and gelation in deionized water. In the fourth step, after 48 hours, the spherical polymer-based precursor is taken out and dried at room temperature. After drying, put it under a nitrogen atmosphere, raise the temperature to 900°C at a rate of 1°C / min, keep it for 3 hours, then cool it down to room temperature naturally, and take out the sample as a millimeter-scale hierarchical porous carbon sphere. The ob...
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