Abstract
Nanostructured carbon with different morphologies are easily prepared by a chemical vapor deposition (CVD) process using nano-CaO as template and toluene as carbon precursor and followed by template removal with diluted hydrochloric acid. During the CVD process, the toluene are pyrolyzed to generate carbon atoms and then deposit on the surface of nano-CaO particles. With a CVD growth time less than 10min, as the surface of the nano-CaO particles are only partly coated with a few layers of carbon atoms, the obtained carbon are small, thin nanosheets with a maximum surface area of 612m2g−1. As the CVD growth time prolonged to over 15min, the pyrolyzed carbon atoms will coat the whole surface of the nano-CaO particles, yielding carbon nanocages with a maximum pore volume as high as 2.618cm3g−1 after template removal.
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