论文信息 - The effect of Pt and Pd surface doping on the response of nanocrystalline tin dioxide gas sensors to CO

The effect of Pt and Pd surface doping on the response of nanocrystalline tin dioxide gas sensors to CO

Abstract SnO2 sensors were prepared by precipitating Sn(OH)4 from an aqueous solution of SnCl4 or by evaporating SnO2 in the UHV. Subsequent X-ray and TEM measurements show grain sizes in the nanometer range after annealing at different temperatures or annealing times. The effect of Pt and Pd doping upon the response to CO is studied. Parameters, which we focused on, are sensor signal dependent on the operating temperature and dependent on the gas concentration. The results for ceramic sensors are compared with those for thin film sensors.

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