title: Surface chemistry, porous texture, and morphology of N-doped carbon xerogels.
abstract: N-doped carbon xerogels were obtained from organic xerogels prepared using different N-containing organic compounds, including 3-hydroxy aniline, melamine, and 3-hydroxy pyridine. Carbonization was carried out between 500 and 900 degreeC. The surface chemistry of samples was determined by elemental analysis and X-ray photoelectron spectroscopy, their porous texture was determined by N2 and CO2 adsorption at (-)196 and 0degreeC, respectively, and their morphology was determined by scanning electron microscopy. N-doped carbon xerogels with a wide variety of N contents and functionalities were obtained according to the ingredients and carbonization temperature used. Carbon xerogels contained, in different proportions, three/four N functionalities: pyridinic, pyrrolic and/or pyridonic, and quaternary N functionalities. They were microporous carbons with narrow micropores that had constrictions at their entrances, producing higher CO2(-) than N2-determined micropore surface areas. Morphology studies showed samples to be constituted by isolated microspheres or microsphere clusters. Microsphere diameters depended on the recipe and carbonization temperature used.
authors.affiliation: Departamento de Química Inorgánica, Facultad de Ciencias, UniVersidad de Granada,18071 Granada, Spain.
authors.forename: María
authors.initials: M
authors.lastname: Pérez-Cadenas
authors.forename: Carlos
authors.initials: C
authors.lastname: Moreno-Castilla
authors.forename: Francisco
authors.initials: F
authors.lastname: Carrasco-Marín
authors.forename: Agustín F
authors.initials: AF
authors.lastname: Pérez-Cadenas