Effect of interaction between components of In2O3-CeO2 and SnO2-CeO2 nanocomposites on structure and sensing properties

Effect of Composition and Structure of Metal Oxide Composites Nanostructured on Their Conductive and Sensory Properties

“…1, curve 3) [20,78]. Shift of the maximum of the sensory sensitivity of the СeO 2 -In 2 O 3 composite to the region of lower (in comparison with the ZnO-In 2 O 3 ) concentrations of CeO 2 can be explained by the fact that the CeO 2 nanoparticles in composites with In 2 O 3 studied in [20,78] are much smaller than ZnO nanoparticles.…”

“…1) in the composite with In 2 O 3 nanocrystals lead to an increase in the sensory effect when detecting hydrogen. At the same time, in the composite based on SnO 2 nanocrystals, additives of cerium oxide sharply reduce the sensory effect [78].…”

“…Most of the two-component sensor materials considered in this review are mixtures of randomly located metal oxide nanoparticles of both components. Such mixtures were obtained by the mechanical mixing of nanoparticles (see, for example, [3,35,74,78]) or by the coprecipitation of metal oxides from mixed solutions [49,59,62,63,78,79].…”

“…In these systems, the current also flows through aggregates of In 2 O 3 nanoparticles, while the СeO 2 nanoparticles, like the ZnO nanoparticles, act as catalysts for the dissociation of oxygen molecules with the subsequent transfer of the oxygen atoms to the In 2 O 3 nanoparticles (Fig. 1, curve 3) [20,78]. Shift of the maximum of the sensory sensitivity of the СeO 2 -In 2 O 3 composite to the region of lower (in comparison with the ZnO-In 2 O 3 ) concentrations of CeO 2 can be explained by the fact that the CeO 2 nanoparticles in composites with In 2 O 3 studied in [20,78] are much smaller than ZnO nanoparticles.…”

“…In the work [78], nanocomposites consisting of In 2 O 3 or SnO 2 nanocrystals containing clusters of CeO 2 of 6 to 8 nm were studied. These clusters (as well as SnO 2 and ZnO, see Fig.…”