Study the characterization and acetone sensing behaviour of CuO-doped SnO2-TiO2 nanocomposite at room temperature

Gas detected with nanosized oxide materials attracts consideration due to its promising capability of identifying different poisonous gases in atmosphere. In this study, the Cu-doped SnO2-TiO2 nanostructures were synthesized by co-precipitation and hydrothermal method using stannic chloride, titanium isopropoxide and copper nitrate as precursors. Structural characterization revealed that the items correspond to nanostructures of Cu particles deposited on SnO2-TiO2 surface. The characterizations studies of hybrid nanocomposites were determined by X-ray diffractrogram, scanning electron microscopy, FTIR and UV-Vis spectroscopy analyses. Optimized nanocomposite was fabricated into high sensitive gas thick film to sense gas molecules. The prepared sensor device using the films exhibits higher responses (sensitivities) to reducing group of gases. The improved sensitivity of this nanocomposite propagates the gas diffusivity of the sensing film comprising Cu-doped SnO2-TiO2. This sensing film will also increase the sensor response due to its catalytic and electrical sensitization effects of Cu and titanium oxide.

Automated summary

Gas sensing using Cu-doped SnO2-TiO2 nanostructures was investigated in this study. The optimized nanocomposite exhibited higher sensitivity to reducing gases, which was attributed to the enhanced gas diffusivity and catalytic properties of the material.