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The Syntheses, Characterizations, and Photocatalytic Activities of Silver, Platinum, and Gold Doped TiO2 Nanoparticles
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  • Journal title : Environmental Engineering Research
  • Volume 16, Issue 2,  2011, pp.81-90
  • Publisher : Korean Society of Environmental Engineering
  • DOI : 10.4491/eer.2011.16.2.81
 Title & Authors
The Syntheses, Characterizations, and Photocatalytic Activities of Silver, Platinum, and Gold Doped TiO2 Nanoparticles
Loganathan, Kumaresan; Bommusamy, Palanisamy; Muthaiahpillai, Palanichamy; Velayutham, Murugesan;
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Different weight percentages of Ag, Pt, and Au doped nano were synthesized using the acetic acid hydrolyzed sol-gel method. The crystallite phase, surface morphology combined with elemental composition and light absorption properties of the doped nano were comprehensively examined using X-ray diffraction (XRD), sorption analysis, transmission electron microscopic (TEM), energy dispersive X-ray, and DRS UV-vis analysis. The doping of noble metals stabilized the anatase phase, without conversion to rutile phase. The formation of gold nano particles in Au doped nano was confirmed from the XRD patterns for gold. The specific surface area was found to be in the range 50 to 85 /g. TEM images confirmed the formation a hexagonal plate like morphology of nano . The photocatalytic activity of doped nano was evaluated using 4-chlorophenol as the model pollutant. Au doped (0.5 wt %) nano was found to exhibit higher photocatalytic activity than the other noble metal doped nano , pure nano and commercial (Degussa P-25). This enhanced photocatalytic activity was due to the cathodic influence of gold in suppressing the electron-hole recombination during the reaction.
4-chlorophenol;Hexagonal plate;Noble metal doped ;Photocatalytic activity;Sol-gel;
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