Photocatalytic Degradation of Carbon Monoxide (CO) Using Bi2O3 Modified TiO2 Photocatalyst

TiO2 modified Bi2O3 nanoheterojunction was prepared using maleic acid as an organic linker. TiO2 phatocatalyst cannot perform photocatalytic reaction in the visible region. It only can work in the UV light region because of its band gap 3.2 eV. On the other hand Bi2O3 modified TiO2 can perform photo activity in UV as well as visible region because Bi2O3 can absorb photon in the visible light. The Bi2O3/TiO2 nanocomposite was characterized Transmission Electron Microscope (TEM), X-ray diffraction (XRD), UV-Vis spectroscopy and Gas Chromatography (GC). The as modified composite exhibited high photo oxidation activity under visible region of λ up to 430 nm, whereof the modified photocatalyst can oxidize CO in UV as well as visible light. Because of the development of anti-air pollution technology, our modified nanoheterojunction could be a significant photocatalyst to oxidize pollutants in air to keep the environment clean.