Preparation and Characterization of Porous Carbons By Defluorination of Ptfe with Alkali Metals - Effect of Alkali Metals on the Porous Structure -

Porous carbons were prepared by defluorination of poly-tetrafluoroethylene(PTFE) with various alkali metals and their porous structures were compared. Using sodium for defluorination resulted in a characteristic mesoporous carbon having a large mesopore volume with the narrow pore-size distribution of 2-3 nm diameter, in contrast to using potassium and rubidium which produced also mesoporous carbons but their pore-size distributions were wide spread. This difference seemed to be caused by the dispersion state of the alkali metal fluoride particles formed during defluorination.