Abstract
Results obtained on the electrical regeneration processes in SnO 2 thin films prepared by spray pyrolysis when films are exposed into a CO atmosphere are presented. Electrical regeneration of the films, defined by the ratio between the resistance after a cycle and its initial resistance, was studied as a function of the partial pressure of CO, temperature, and different atmospheres. Heat treatments in vacuum, nitrogen, and argon help to recover the electrical properties of SnO 2 thin films exposed to CO. The best values of the electrical regeneration of these films range from 84 to 95% for thermal treatments at 400 °C.
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