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Transition metal ions effect on the properties and photocatalytic activity of nanocrystalline TiO2 prepared in an ionic liquid

Ghasemi, S. (Shahnaz) ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jhazmat.2009.08.029
  3. Abstract:
  4. TiO2 and transition metal (Cr, Mn, Fe, Co, Ni, Cu, and Zn) doped TiO2 nanoparticles were synthesized by the sol–gel method using 2-hydroxylethylammonium formate as an ionic liquid. All the prepared samples were calcined at 500 °C and characterized by X-ray diffraction (XRD), BET surface area determination, energy dispersive X-ray (EDX) analysis, diffuse reflectance spectroscopy (DRS), and Fourier transformed infrared (FT-IR) techniques. 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 Acid Blue92 (AB92) 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 dye solutions were done at regular intervals gave a good idea about mineralization of dye
  5. Keywords:
  6. Nanocrystalline TiO2 ; Sol–gel preparation ; Ionic liquid ; Transition metal ; Acid Blue 92
  7. Source: Journal of Hazardous Materials ; Volume 172, Issues 2–3 , December , 2009 , Pages 1573–1578
  8. URL: http://www.sciencedirect.com/science/article/pii/S0304389409013089