【摘要】 采用沥青焦为原料,以KOH和NaOH活化剂制备出不同碱炭质量比(R)系列活性炭。利用X射线衍射(XRD)和X射线光电子能谱(XPS)表征出所制活性炭的石墨层结构和表面化学性质,并用氮气吸附和脱附等温线计算出BET比表面积、DFT孔径分布及孔容。实验结果表明,与NaOH活化剂相比,KOH活化剂所制活性炭石墨层破坏更明显,表面含氧官能团也明显增加。当R=5时,KOH活化剂所制样品BET比表面积高达2 939m2/g,孔容为1.43cm3/g;而NaOH活化剂所制样品BET比表面积和孔容分别只有1 098m2/g、0.53cm3/g。更多还原

【Abstract】 A series of petroleum coke-based activated carbons (ACs) were prepared by chemical activation method in different KOH or NaOH/petroleum coke ratio(R).Pore properties of these activated carbons including the BET specific surface area,pore diameter,pore size distribution and pore volume were characterized by DFT method based on N2 adsorption/desorption isotherm.The changes in the surface graphite structure and surface chemistry of the ACs were studied by X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS).It was found that the surface graphite structure of the ACs was quite destroyed by KOH activation,but its surface oxygen groups increaes obviously.When R was equal to 5,the maximum BET specific surface area and pore volume which were obtained by KOH activation method are 2 939m2g-1 and 1.43cm3g-1,respectively.The micropores’percentage of the samples which obtained by KOH activation method have little changes,and the maximum BET specific surface area and pore volume of the samples are 1 098m2/g and 0.53cm3/g,respectively.更多还原