Surface areas of graphitized and non-graphitized carbon blacks: The adsorption of tetrapentylammonium bromide from aqueous solution

Abstract

The adsorption of tetrapentylammonium bromide, TPAB, was measured from aqueous solution on a series of non-graphitized and graphitized carbon blacks. The surface areas and porosities of the carbons were determined from nitrogen adsorption isotherms using the BET equation, and the t-plot and V- n plot methods of de Boer and Pierce. From these results, the most probable areas occupied by TPAB were calculated. The values obtained were dependent on the method used for the analysis of the nitrogen adsorption isotherms, and the area adopted for the nitrogen molecule. It was found, however, that under certain conditions the TPAB molecule occupied equal areas per molecule on both types of carbon surface.