One-step synthesis and photocatalytic properties of VOx-TiO2 nanocomposite catalysts under UV and visible light conditions

S. Kim, M.S. Suh, J.W. Cho
Korea Electronics Technology Institute, KR

Keywords: photocatalysis, vanadium, titania, UV

Summary:

Simple synthesis method was applied for nanocomposite materials composed of vanadium oxide and titanium oxide. Agglomerated nanocomposite materials were characterized by scanning electron microscopy, transmission electron microscopy, and UV-visible diffuse-reflectance spectroscopy (UV-vis DRS). Compositions of multi-component catalysts were varied by vanadium precursor amount and band gap energies were measured for various samples by UV-vis DRS. Photocatalytic activities of prepared samples were investegated by the degradation of methylene blue and phenol under 250 W Xe-lamp radiation with various longpass filters for UV and visible light condition. The results show that the as-prepared VOx-TiO2 nanocomposites have different degradation abilities of methylene blue and phenol solution dependent on the amount of vanadium oxide and the wavelength of exposed light source.