Journal of Physics Conference Series · 2007 · 39 citations · 6 references
Natural SciencesMaterials EngineeringMaterials ScienceMaterials ChemistryNanomaterialsNanotechnologyInorganic NanoparticlesNanomaterial CharacterizationNanomaterials SynthesisNanoparticle CharacterizationNanoparticle SynthesisX-ray DiffractionAnnealingEnergy Dispersive X-ray SpectroscopyEnergy-dispersive X-ray SpectroscopyPhase Transformation AnalysisSol-gel MaterialsTitanium Dioxide NanoparticlesTitanium OxidesX-ray Diffraction Analysis
Pure, Nb-doped and Ag-doped titania nanoparticles were synthesized by sol-gel technique with dopant concentrations ranging from 0.5 to 1.5 atomic percent Nb or Ag. The annealing temperatures ranged from 250 to 900 °C. Changes in phase transformation of the doped samples with reference to pure titania were studied. It was found that Nb doping stablizes the anatase phase while Ag doping accelerates the transformation from anatase to rutile at a concentration higher than 0.5 at. %. The samples were analyzed by X-ray diffraction (XRD), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), Xray Photoelectron Spectroscopy (XPS) and Energy Dispersive X-ray Spectroscopy (EDS).
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