Study of Photocatalytic activity and properties of Transition metal ions doped Nanocrystalline TiO₂ prepared by Sol-Gel Method

Transition metal (Mn, Fe, Co,) doped TiO₂ nanoparticles were synthesized by the sol-gel method. All the prepared samples were calcined at different temperature like 200°C to 800°C and characterized by X-ray diffraction (XRD), Energy dispersive X-ray (EDX) analysis, The studies revealed that transition metal (TM) doped nanoparticles have smaller crystalline size and higher surface area than pure TiO₂. Dopant ions in the TiO₂ structure caused significant absorption shift into the visible region. The results of photodegradation of Formaldehyde in aqueous medium under UV light showed that Photocatalytic activity of TiO₂ nanoparticles was significantly enhanced by the presence of some transition metal ions. Chemical Oxygen Demand (COD) of formaldehyde solutions were done at regular intervals gave a good idea about mineralization of formaldehyde.