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.

(Ti,Sn)O2 binary solid solutions for gas sensing: spectroscopic, optical and transport properties

GHIOTTI, Giovanna;MORANDI, Sara;
2008-01-01

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.
2008
130
38
45
Nanomaterials; Semiconductor oxides; Solid solutions; Gas sensors.
M.C. CAROTTA; S.GHERARDI; V. GUIDI; C. MALAGU'; G. MARTINELLI; B. VENDEMIATI; M. SACERDOTI; G. GHIOTTI; S. MORANDI; A. BISMUTO; P. MADDALENA; A. SETA...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/21852
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