Preparation and Microstructure Analysis of TiC-Derived Carbons with Hierarchical Pore Structure

Carbide-derived carbons (CDCs) with hierarchical pore structure are prepared from commercial TiC powders by chlorination at temperature range of 600-1100 degrees C. As-synthesized CDCs mainly consist of amorphous carbon and there exists a graphitization trend at chlorinating temperature above 800 degrees C. If chlorinating temperature is below 1000 degrees C, CDC particles maintain the shape of original TiC particles. Above 1000 degrees C, obvious cracks appear in CDC particles and some particles are broken into small parts. The specific surface area (SSA) of CDCs is in the range from 672 m(2)/g to 1609 m(2)/g. The highest SSA is 1609 m(2)/g for CDC chlorinated at 1000 degrees C. Most pores in these CDCs are micropores with the size of 0.7-2 nm. However, some mesopores and macropores also exist.