(Ti, Sn)O2 binary solid solution for gas sensing: spectroscopic, optical and transport properties
- CAROTTA M. C
- GHERARDI S
- GUIDI V
- MALAGU' C
- MARTINELLI G
- VENDEMIATI B
- SACERDOTI M
- GHIOTTI G
- MORANDI S
- BISMUTO A
- MADDALENA, PASQUALINO
- SETARO, ANTONIO
DOIAbstract
Novel TixSn1-xO2 (0.3á<áxá<á0.9) 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 xá=á0.7 showed a beginning of spinodal decomposition revealed by XRD. Surprisingly, the samples with xá=á0.3 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 differen...
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