Author/Authors :
Carotta، نويسنده , , M.C. and Gherardi، نويسنده , , S. and Guidi، نويسنده , , V. and Malagu’، نويسنده , , C. and Martinelli، نويسنده , , G. and Vendemiati، نويسنده , , B. and Sacerdoti، نويسنده , , M. and Ghiotti، نويسنده , , G. and Morandi، نويسنده , , S. and Bismuto، نويسنده , , A. and Maddalena، نويسنده , , P. and Setaro، نويسنده , , A.، نويسنده ,
Abstract :
Novel TixSn1−xO2 (0.3 < x < 0.9) nanostructured oxides for gas sensing, have been synthesized and characterized through a great variety of investigation techniques, such as electron microscopy, X-ray diffraction, specific surface area measurements, UV–vis and IR spectroscopies, photoluminescence emission spectra and finally electrical measurements. All structural investigations showed solid solutions of the two single oxides; only the oxide with x = 0.7 showed a beginning of spinodal decomposition revealed by XRD. Surprisingly, the samples with x = 0.3 and 0.5 exhibited carbon monoxide response much higher than for pure SnO2. Investigations on this point, performed through spectroscopic measurements in the presence of CO, suggest a different behaviour of the solid solutions from the single oxides.
Keywords :
Nanomaterials , solid solutions , Semiconductor oxides , Gas sensors
