Synthesis and Characterization of Nanoporous Graphitic Nanocages by Sulfur-doping Template Method

A new sulfur(S)-doping template approach was demonstrated to fabricate highly nanoporous graphitic nanocages(GNCs) by air-oxidizing the template in the graphitic shells to create nanopores. Sulfur was introduced into graphitic shells, when Fe@C core-shell nanoparticles were prepared and then S-doped GNCs were obtained by removing their ferrous cores. Due to removing S-template, both the specific surface area and the mesopore volume of the GNCs have sharply risen from 540 to 850 m 2 /g, 0.44 to 0.90 cm 3 /g, respectively. Compared with traditional approaches for highly nanoporous graphitic nanomaterials, present S-template approach can sharply increase specific surface area of GNCs without violently destroying their graphitic structure.