Chemistry, Physics and Technology of Surface, 2014, 5 (3), 309-316.

Electroconductivity of surface of SnO2:Sb films modified with Pd and Pt



E. V. Panov, O. I. Milovanova, S. M. Malyovanyi, E. A. Genkina

Abstract


Using the molten precursor (KNO3, 400 °C), SnO2:Sb nanoparticles with surface modified with Pd and Pt atoms have been synthesized. Their morphology, phase composition, concentration of dopants have been studied. The influence of adsorption of air oxygen, ethanol, and acetone vapour (0.5–350 ppm) on the electroconductivity G of SnO2:Sb, М/SnO2:Sb (М = Pd, Pt, Pd + Pt) films at the temperature of 20–250 °С has been examined. It has been found that simultaneous doping with Pd and Pt increases the concentration of oxygen in the О– form on the film, improves the kinetics of gas-analyte oxidation, shifts the gas sensitivity to the region of low temperatures (200 °С). At this way the time stability of the film is retained.

Keywords


SnO2:Sb nanopowders; electroconductivity; adsorption of gases; doping

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Copyright (©) 2014 E. V. Panov, O. I. Milovanova, S. M. Malyovanyi, E. A. Genkina

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