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The relationships between the composition, structure, chemistry of the surface, and sensor properties of nanocomposites SnO 2 -М n О m (M n O m = Fe 2 O 3 , MoO 3 , V 2 O 5 ) obtained by chemical precipitation from solutions were analyzed. The relationships between the elemental and phase composition of the nanocomposites and the effect of the composition on the nanostructure and the acidic and oxidation properties of the nanocomposite surface were considered. The modification of the SnO 2 surface by other oxides makes it possible to control the type and density of the acid sites and the oxidation properties of the surface and to enhance the selectivity of the materials in the detection of various gases.

The effect of Pd nanoparticles on the H2 sensitivity of SnO2 thin films was studied in real working conditions using X-ray Absorption Spectroscopy (XAS), electrical conductivity measurements and mass-spectrometry.