Advanced Metaloxide Nanomaterials for Gas Sensors with Controlled Properties

Abstract

Sol-gel approach based on inorganic metal precursors was used to obtain Fe2O3−In2O3 nanocomposites with different microstructure and grain size. The synthesis conditions, which result in the formation of metastable γ-Fe2O3 phase, were revealed. This phase stabilized in the Fe2O3−In2O3 composites was found to be more active in adsorption and catalysis as compared to thermodynamically stable α-Fe2O3. The Fe2O3−In2O3 compositions suitable for the selective detection of O3, NO2 and C2H5OH were proposed.