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以葡萄糖为前驱体,采用液相碳化法,制备颗粒约为100~200nm胶体碳微球。采用KOH作活化剂对胶体碳微球进行活化处理。考察了碱炭比、活化温度和保温时间等工艺因素对孔径和比表面积的影响。通过XRD、SEM等分析手段对胶体碳微球活化前后的表面形貌、孔径分布、显微结构进行分析。经热处理和活化后,胶体碳微球的BET比表面积从26.6m2/g增加到1383.4m2/g。相同实验条件下,在亚甲基蓝液相吸附试验中,经活化处理后的样品所表现出的吸附量是商业活性炭Calgon-F300的两倍。
Using glucose as precursor, liquid carbonation method was used to prepare colloidal carbon microspheres with particle size of about 100 ~ 200nm. Activated colloidal carbon microspheres were activated by KOH. The effect of process parameters such as the ratio of alkali to carbon, activation temperature and holding time on the pore size and specific surface area was investigated. The surface morphology, pore size distribution and microstructure of the colloidal carbon microspheres before and after activation were analyzed by XRD, SEM and other analytical means. After heat treatment and activation, the BET specific surface area of colloidal carbon microspheres increased from 26.6m2 / g to 1383.4m2 / g. Under the same experimental conditions, in the methylene blue liquid phase adsorption test, the sample after activation treatment showed twice the amount of the commercial activated carbon Calgon-F300.