MOX-Based Resistive Gas Sensors with Different Types of Sensitive Materials (Powders, Pellets, Films), Used in Environmental Chemistry

The identification of an unknown gaseous species or the composition a mixture can be performed using various experimental techniques such as: mass spectrometry, chromatography, nuclear magnetic resonance (NMR), infrared (IR), X-Rays, by combining these analytical (in automated analyzers). Unfortunately, use highly expensive equipment and require qualified personnel. Using gas sensors is viable inexpensive alternative. most commonly used in field are resistive type chemosensors (chemiresistors), due to their simple detection mechanism low manufacturing costs. principle based on catalytic reaction between sensitive material sensor target gas. This occurs with release consumption electrons, influencing overall electrical resistance sensor. review describes MOX-based chemiresistors, which contain different types substrates, as powders, pellets films, well clear tendency towards miniaturization constant improvement fabrication greener more cost-effective synthesis routes over time. goal this research was obtain high 3S parameters (sensitivity, selectivity, stability), that mass-produced implemented wide scale.