Sol-gel made titanium dioxide nanostructured thin films as gas-sensing materials for the detection of oxygen

The titanium dioxide nanostructured thin films have been obtained using a sol-gel process at different crystallization temperatures. The influence of both the phase composition and the particle dispersity of 2D nanomaterials on their gas-sensing properties has been evaluated. The TiO₂ nanostructured thin film prepared from xerogel under the mildest crystallization conditions (500 °C, 1 h) exhibited high sensitivity and selectivity in oxygen detection within a broad range of its concentrations at 350 °C.