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

Ghasemi, S ; 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. Acid Blue 92 ; Ionic liquid ; Nanocrystalline TiO2 ; Transition metal ; Aqueous medium ; BET surface area ; Crystalline size ; Diffuse reflectance spectroscopy ; Dopant ions ; Doped nanoparticles ; Doped-TiO ; Dye solutions ; Energy dispersive x-ray ; Fourier ; Nanocrystalline TiO ; Photocatalytic activities ; Sol gel preparations ; Sol-gel methods ; Sol-gel preparation ; Surface area ; TiO ; UV light ; Visible region ; Acids ; Calcination ; Chemical oxygen demand ; Chromium ; Doping (additives) ; Gels ; Infrared spectroscopy ; Light ; Manganese ; Manganese compounds ; Metal ions ; Metals ; Nanocrystalline materials ; Nanoparticles ; Oxygen ; Photocatalysis ; Photodegradation ; Reconnaissance aircraft ; Semiconducting glass ; Sol-gel process ; Sol-gels ; Sols ; Trace analysis ; X ray diffraction ; X ray diffraction analysis ; Ionization of liquids ; 2 hydroxylethylammonium formate ; Anazolene sodium ; Cobalt ; Copper ; Iron ; Nanocrystal ; Nickel ; Titanium dioxide ; Unclassified drug ; Zinc ; Degradation ; Dye ; Ion ; Oxide ; Photolysis ; Titanium ; Transition element ; Aqueous solution ; Chemical analysis ; Crystal structure ; Ultraviolet radiation ; Water management ; Catalysis ; Coloring agents ; Crystallization ; Photochemical processes ; Transition elements ; Ultraviolet rays ; Water pollutants, chemical ; Water purification
  7. Source: Journal of Hazardous Materials ; Volume 172, Issue 2-3 , 2009 , Pages 1573-1578 ; 03043894 (ISSN)
  8. URL: http://www.sciencedirect.com/science/article/pii/S0304389409013089