the Photocatalytic activities of various titania (TO2) based catalytic systems were investigated under uv. visible and in the dark. It was found that the activity in the dark of Tio2 could be induced when in metal oxide was used in combination with V20, in a form of hybrid metal oxides, TO2mor vos). Next. Tio2PPy and a series of situ polymerization of pyrrole with FeCl3 nanocomposites were then prepared via TGA and SEM-EDx under various reaction times. The results from FTIR. been are sufficient to confirm that the various metal oxides PPy nanocomposites have Tio2. successfully pr The presence of polymer resulted in a lower photocatalytic activity of However, for the hybrid metal oxides tocatalytic vity of the system the presence of polymer enhanced p relation to the under both uv and visible light. The above results were discussed in energy storage ability of V20, and a capability of the semi-conducting polymer in acting as a binder for the hybrid metal oxides. Overall, our results show that the hybrid metal oxidespolymer nanocomposite can degrade methylene blue both under both wvisible light and in the dark. The cat- alytic activities of the hybrid nanocomposite under both UV irradiation. visible light illumination and in the dark conditions were optimized when Tio2KTO2-V205)PPy was prepared via in situ polymer- ization for 6 h.