Photocatalytic performance and near infrared absorption property of tungsten and tungsten-carbon doped titania

Tungsten and tungsten-carbon doped titania particles were successfully synthesised by a simple solvothermal method using WCl₆ as W source and titanium tetra-n-butoxide/ethanol as C source. With the incorporation of W in TiO₂ lattice, the near infrared absorption property of W-TiO ₂ samples was strongly promoted. Furthermore, the visible light absorption capability of TiO₂ based samples was also greatly affected by codoping C in W-TiO₂. More importantly, the C-W codoped TiO ₂ samples presented excellent continuous toxic NO gas destruction ability much superior to those of undoped TiO₂, solely C and W doped TiO₂ as well as commercial P25 titania under the irradiation of UV and visible lights. The near infrared absorption performance and photocatalytic activity of TiO₂ based products could be effectively controlled by W doping and C-W codoping, which probably have a promising application in the field of environmental protection and near infrared light shielding.