CONICET | Buscador de Institutos y Recursos Humanos

Carbon porous materials are of great scientific and technological interest due primarily to its ability to interact with atoms, ions and molecules not only in the external surface but also in the internal surface of the material. Different methods of synthesis and a wide range of precursors have been studied to obtain different carbon materials with interesting textural properties. Among these, nanoporous templated carbons materials have acquired great interest because of their hydrophobic nature and high chemical inertness. However, one of the most attractive properties is that they are hierarchical materials with porosity well-defined in both microporous and mesoporous region. In addition, they frequently present high specific surface areas and pore volumes making of them suitable materials for applications in adsorption. By means of the nanocasting technique it is possible to improve the level of structural ordering using an inorganic matrix (template) to guide the formation of pores and producing novel materials with a broad control of the porosity.In this work, two inorganic porous materials, SBA-15 and KIT-6 were selected as template and they were impregnated with sucrose as carbon precursor. After polymerization and pyrolysis steps, the template were removed using HF, and finally washing and dry steps were carried out, obtaining the hierarchical porous carbon materials (CMK-3 and CMK-8 from SBA-15 and KIT-6, respectively) which are a negative replica of the porous structure of the templates. These carbon materials were chemically activated with KOH in order to increase its micropore volume. Finally, all the materials (SBA-15, KIT-6, CMK-3, CMK-8, CMK-3_a and CMK-8_a) were characterized by N2 adsorption-desorption at 77 K, CO2 adsorption at 273 K, nonane pre-adsorption, immersion calorimetry, X-ray diffraction, SEM and TEM.