Preparation of Carbon-Coated $TiO_2$ at Different Heat Treatment Temperatures and Their Photoactivity

  • Chen, Ming-Liang (Department of Advanced Materials & Science Engineering, Hanseo University) ;
  • Bae, Jang-Soon (Department of Industrial Chemistry, Dankook University) ;
  • Oh, Won-Chun (Department of Advanced Materials & Science Engineering, Hanseo University)
  • Received : 2006.09.26
  • Accepted : 2006.12.11
  • Published : 2006.12.30

Abstract

Carbon-coated $TiO_2$ was prepared by $CCl_4$ solvent mixing method with the different heat treated temperatures (HTTs). Since the carbon layers derived from pitch on the $TiO_2$ particles were porous, the carbon-coated $TiO_2$ sample series showed a good adsorptivity. The values of BET surface areas measured were shown independently on the HTTs. The surface states by SEM present to the characterization of porous texture on the carbon-coated $TiO_2$ sample and carbon distributions on the surfaces. From XRD data, PT700 and PT750 were shown the X-ray diffraction patterns of the anatase $TiO_2$, but PT800 and PT850 were kept anatase-type structure even after heating at $800^{\circ}C$, though small amount of the rutile-type structure appears. The results of EDX microanalyses were observed for each sample show the spectra corresponding to almost all samples similar to C, O and Ti elements with an increase of HTTs. Finally, the excellent photoactivity of carbon-coated $TiO_2$ (especially, PT700 and PT750) could be attributed to the homogeneous coated carbon on the external surface and the structural anatase phase.

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