COMBINING WATER, ARGON AND NITROGEN ADSORPTION FOR AN ADVANCED CHARACTERIZATION OF ORDERED NANOPOROUS CARBONS

摘要

^ During recent years, major progress has been achieved in the understanding of the adsorption and phase behavior in ordered micro- and mesoporous materials with simple pore geometries, which has led to major advances in structural characterization by physical adsorption. However, the effects of geometrical and chemical heterogeneities of the pore walls on the sorption, phase, and wetting behaviors of fluids in nanoporous materials such as nanoporous carbons are still under investigation. The potential use of water as a probe for surface chemistry and pore structure characterization of nanoporous carbon materials has led to a lot of interest. The use of water adsorption is attractive because it can be performed at room temperature, water has a very small kinetic diameter which allows it to enter pores even smaller than the ones accessible to carbon dioxide, argon, and nitrogen, and it is sensitive to surface chemistry.