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以模板法结合化学活化法制备了具有分级结构的纳米孔炭。分别利用氮气吸附法和热重分析法考查KOH活化程度对模板法制备中孔炭的孔结构的影响和不同孔结构的多孔炭对CO2的吸附性能。结果表明,KOH活化不仅增加了大量的微孔,而且使得模板脱除得到的中孔数量降低。中孔吸附CO2对孔表面的利用率最高,而中孔和微孔的合适配比更有利用综合提高CO2的吸附量。制备的纳米孔炭具有较高的CO2吸附量和较好的循环性能和稳定性。
Nanoporous carbon with hierarchical structure was prepared by template method and chemical activation method. The effects of KOH activation on the pore structure of mesoporous carbon prepared by the template method and the adsorption of CO2 by porous carbon with different pore structures were investigated by nitrogen adsorption and thermogravimetric analysis, respectively. The results showed that KOH activation not only increased the number of micropores, but also reduced the number of mesopores obtained by template removal. Mesoporous CO2 adsorption on the surface of the hole utilization rate of the highest, and the ratio of the hole and the microporous more comprehensive utilization of CO2 to increase the amount of adsorption. The prepared nanoporous carbon has higher CO2 adsorption capacity and better cycling performance and stability.