Fabrication of Ti Porous body with Improved Specific Surface Area by Synthesis of CNTs Choi, Hye Rim; Byun, Jong Min; Suk, Myung-Jin; Oh, Sung-Tag; Kim, Young Do;
This study is performed to fabricate a Ti porous body by freeze drying process using titanium hydride () powder and camphene. Then, the Ti porous body is employed to synthesize carbon nanotubes (CNTs) using thermal catalytic chemical vapor deposition (CCVD) with Fe catalyst and methane () gas to increase the specific surface area. The synthesized Ti porous body has -sized macropores and -sized micropores. The synthesized CNTs have random directions and are entangled with adjacent CNTs. The CNTs have a bamboo-like structure, and their average diameter is about 50 nm. The Fe nano-particles observed at the tip of the CNTs indicate that the tip growth model is applicable. The specific surface area of the CNT-coated Ti porous body is about 20 times larger than that of the raw Ti porous body. These CNT-coated Ti porous bodies are expected to be used as filters or catalyst supports.