Abstract: TiO₂ fibers were prepared via alternatively introducing water vapor and Ti precursor carried by N₂ to an APCVD (chemical vapor deposition under atmospheric pressure) reactor at ≤200 °C. Activated carbon fibers (ACFs) were used as templates for deposition and later removed by calcinations. The obtained catalysts were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer, Emmett and Teller (BET) and X-ray diffraction (XRD) analysis. The pores within TiO₂ fibers included micro-range and meso-range, e.g., 7 nm, and the specific surface areas for TiO₂ fibers were 141 m²/g and 148 m²/g for samples deposited at 100 °C and 200 °C (using ACF1700 as template), respectively. The deposition temperature significantly influenced TiO₂ morphology. The special advantages of this technique for preparing porous nano-material include no consumption of organic solvent in the process and easy control of deposition conditions and speeds.

Key words: Chemical vapor deposition (CVD), Porous material, Activated carbon fiber (ACF)

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