Immobilized Bi 2WO 6 thin films were successfully synthesized by direct chemical deposition on SiO 2 photonic crystals. The as-prepared Bi 2WO 6/SiO 2 photonic crystal films exhibited excellent photocatalytic decomposition of RhB and phenol under visible light irradiation. Almost 99% of the RhB molecules were degraded within 60min and 64% of the phenol molecules were degraded within 2h along with the sharp decrease of total organic carbon (TOC) under visible light irradiation. Comparative studies indicated that the photocatalytic activity of the Bi 2WO 6/SiO 2 films is about 3 times higher than that of ordinary Bi 2WO 6 films under the same conditions. The transmission spectrum of the Bi 2WO 6/SiO 2 photonic crystal films exhibited an apparent transmission dip around 550nm originated from its photonic crystal structure. The different photocatalytic performance between the ordinary Bi 2WO 6 film and the Bi 2WO 6/SiO 2 photonic crystal film may be ascribed to their different film structures.
All Science Journal Classification (ASJC) codes
- General Environmental Science
- Process Chemistry and Technology