Preparation and characterization of mesoporous carbon materials of Chinese medicine residue with high specific surface areas

High specific surface areas mesoporous carbon materials were prepared by a combined method of carbonization and activation processes, in which Chinese herb residue was used as carbon source, and KOH was used as activator, respectively. N2 adsorption and desorption isotherms were employed to determine by the specific surface areas and pore analyzer. Scanning electron microscopy(SEM) was used for analyzing morphology structure. X-ray diffraction (XRD) were used for analyzing the crystal forms of the materials. Thesurface functional groups were tested by X-ray photoelectron spectroscopy (XPS). The results showed that the optimum KOH/carbon ration and activation temperature is 4:1and 750°C for the mesoporous carbon materials prepared with traditional Chinese medicine residue. The structure of the materials were of nongraphitized carbonaceous materials, which possess the best surface morphology and porous performance. The porous structure of the surface is a regular shape, and the specific surface is as were as high as 2079 m2/g. After activation, the amount of microporous of the materials was decreased, and the proportion of mesoporous is increased, which result in the mesoporous ratio and average pore size increased to 79.10% and 6.78nm, respectively. Copyright © 2016, AIDIC Servizi S.r.l.