| 초록 |
The TiO2/SiOx double-layer films were coated on the polypropylene (PP) beads by a rotating cylindrical plasma chemical vapor deposition (PCVD) process and the photocatalytic activity of double-layer films was tested for the photodegradation of phenol in aqueous solution.The thickness of TiO2/SiOx double-layer could be controlled easily by the deposition time.The photodegradation rate of phenol by double-layer films on the PP beads increases as the initial phenol concentration increases or as the number of PP beads coated with double-layer films increases in aqueous solution.The presence of the SiOx bottom-layer improved the photocatalytic activity of the TiO2 layer because it may act as a trap for electrons generated in the TiO2 layer, thus, preventing the electron-hole recombinations.The rotating cylindrical PCVD process can be a good method to coat the high-quality double-layer films on the particles.It is proposed that the particles coated with double-layer films can be applied to the removal of water pollutants with high efficiency. |
