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Fabrication of Ti Porous body with Improved Specific Surface Area by Synthesis of CNTs

CNTs 합성을 통해 향상된 비표면적을 갖는 Ti 다공체의 제조

  • Received : 2016.03.25
  • Accepted : 2016.04.12
  • Published : 2016.06.28

Abstract

This study is performed to fabricate a Ti porous body by freeze drying process using titanium hydride ($TiH_2$) 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 ($CH_4$) gas to increase the specific surface area. The synthesized Ti porous body has $100{\mu}M$-sized macropores and $10-30{\mu}m$-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.

Keywords

Titanium porous body;freeze drying method;carbon nanotube (CNT);catalytic chemical vapor deposition (CCVD);specific surface area

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Acknowledgement

Supported by : 한국연구재단, 한국에너지기술평가원(KETEP)