微波并用加热制备高品质活性炭及其特性

PREPARATION OF HIGH QUALITY ACTIVATED CARBON BY MICROWAVE HYBRID HEATING AND ITS PROPERTIES

以回收聚酯（PET）为原料，通过微波的内部和外部的混合加热，结合氢氧化钾（KOH）活化法制备高纯度、高比表面积活性炭，介绍了制备方法和炭化、活化工艺条件。采用这种方法可制得比表面积在3200m^2／g以上、最频孔径在1～3nm的活性炭。通过电镜等结果，从构造观点阐明了活性炭的比表面积、细孔结构等性质，通过氢气还原处理，可降低活性炭的表面含氧官能团浓度。该活性炭作为有机溶液系（电解液：1MEt4NBF4／PC溶液）双电层电容器的电极材料，具有48F／g以上的比电容量。

Activated carbons （ACs）were prepared from recycling polyethylene terephthalate （PET） by KOH activation and direct internal and indirect heating through microwave （MW） irradiation. The preparation method,carbonization,and activation conditions were investigated. The ACs have specific surface area over 3 200 mZ/g and pore-size distribution of 1-3nm. The properties of ACs were explained on structural viewpoint based on the results of electron microscopy tests. The concentration of surface acidic functional groups decreases with H2 reduction. Moreover,when ACs were＇used as electrode material for Electric Double Layer Capacitor（EDLC） in organic solution （1M Et4NBF4/PC） ,the results of charge--discharge measurement show a high capacitance over 48F/g.