Effects of UV-Vis Irradiation on Vanadium Etioporphyrins Extracted from Crude Oil and the Role of Nanostructured Titania

<table>(a) X-ray diffraction spectra of TiO<sub>2</sub> (Degussa P25) and N-TiO<sub>2</sub>/Cu. (b) XPS of N-TiO<sub>2</sub>/Cu.</table>

International Journal of Photoenergy

Figure 1: Effects of UV-Vis Irradiation on Vanadium Etioporphyrins Extracted from Crude Oil and the Role of Nanostructured Titania 