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

<table>UV-Vis absorbance spectra as a function of illumination time in the presence of the TiO<sub>2</sub> nanomaterial with the crude oil extracts: (a) COE-TiO<sub>2</sub> and (b) COEW-TiO<sub>2</sub>. The insets show the bands observed at 530 nm and 569 nm.</table>

International Journal of Photoenergy

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Figure 4

Figure 4: Effects of UV-Vis Irradiation on Vanadium Etioporphyrins Extracted from Crude Oil and the Role of Nanostructured Titania 