Structure, Conductivity, and Sensor Properties of Nanosized ZnO-InO Composites: Influence of Synthesis Method.

The influence of the method used for synthesizing ZnO-InO composites (nanopowder mixing, impregnation, and hydrothermal method) on the structure, conductivity, and sensor properties is investigated. With the nanopowder mixing, the size of the parent nanoparticles in the composite remains practically unchanged in the range of 50-100 nm. The impregnation composites consist of 70 nm InO nanoparticles with ZnO nanoclusters < 30 nm in size located on its surface.

Synthesis, Structural and Sensor Properties of Nanosized Mixed Oxides Based on InO Particles.

The paper considers the relationship between the structure and properties of nanostructured conductometric sensors based on binary mixtures of semiconductor oxides designed to detect reducing gases in the environment. The sensor effect in such systems is determined by the chemisorption of molecules on the surface of catalytically active particles and the transfer of chemisorbed products to electron-rich nanoparticles, where these products react with the analyzed gas. In this regard, the role is evaluated of the method of synthesizing the composites, the catalytic activity of metal oxides (CeO, SnO, ZnO), and the type of conductivity of metal oxides (CoO, ZrO) in the sensor process.