Porous carbons synthesized by ultrasonic spray pyrolysis


Sara E. Skrabalak, Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Av, Urbana, IL 61801 and Kenneth S. Suslick, ksuslick@uiuc.edu, School of Chemical Sciences Department of Chemistry, University of Illinois: Urbana-Champaign, 600 S. Mathews, Urbana, IL 61801.
New meso- and macro- porous carbon powders were prepared by ultrasonic spray pyrolysis of aqueous solutions containing alkali metal salts of chlorinated acetate, acrylate, and benzoate anions. Template salts are generated in situ during precursor decomposition; collection of the resultant material in water bubblers removes the template salt, leaving a network of porous carbon behind. The materials have been characterized by SEM, TEM, XRD, MAS 13C NMR, XPS, and BET surface area and pore size distribution measurements. This preparatory method provides an extremely facile method for the generation of meso- and macro- porous carbons. Changing the alkali-metal, solution concentration, and decomposition temperature alters the morphology and pore structure of the final material. Applications of such materials are considered.