Controlled synthesis of core-shell carbide-derived carbons through in situ generated chlorine

摘要: Core-shell porous carbon represents an innovative concept for optimizing performances of materials in a wide range application. Here, novel route to produce carbons with spatially varying pore and microstructure is presented. Following the carbide-derived method, homogeneous adjustable shell generation achieved through mixing limited amount solid chlorine precursors titanium carbide raw material. Chlorine released situ when reaching approx. 600 °C consumed subsequently directly, resulting aspired materials. Various characterization methods proved that precursor directly adjusts share core-shell material, while 5–80% was studied. The amorphous, microporous can be converted mesoporous graphitic (crystal sizes 20 nm), subsequent vacuum annealing, allowing control properties shell. core results after second chlorination step, where gaseous used. were characterized detail every step this route. Adjusting between mesoporous/graphitic microporous/amorphous these new interest applications competing processes like mass transfer surface interaction need optimized.