Enhancement of Titania Photocatalytic Properties by Fabrication of MWCNT-TiO_2 Nanocomposites

摘要

Multi- walled carbon nanotube and nano TiO_2 composite,(MWCNT)-TiO_2, was synthesized via sol-gel deposition method. The product was characterized with FE-SEM and XRD analysis and the results were compared with nano-tube TiO_2 prepared by thermal treatment of the produced nano-composite. Photocatalytic degradation of acetaldehyde, under UV and visible light irradiation, was performed in a continuos flow reactor equiped with 80W Hg lamp and the results were compared with commercial TiO_2 powder (P25). Results showed considerable decrease in concentration of acetaldehyde fed into the reactor during a short time (70 min) for hybrid materials in comparison to nano-tube TiO_2. Furthemore, under visible light irradiation nanocomposite materials revealed good improvement in photocatalytic efficiency with respect to P25 powder.