WO3-LaFeO3 Nanocomposites for Highly Sensitive Detection of Acetone Vapor at Low Operating Temperatures

The development of a rapid, highly sensitive, and dependable acetone sensor holds significant importance for human health safety. To enhance the sensing performance LaFeO3 nanoparticles practical applications, commercial n-type WO3 were incorporated as additives. They directly mixed with produced through sol-gel method, creating series WO3-LFO nanocomposites varying mass ratios. These characterized using XRD, SEM, BET, XPS techniques. Compared to pure LFO nanoparticles, prepared exhibited larger specific surface areas enhanced reactivity. introduction p-n heterojunctions mixing process improved regulation molecules on internal carrier conduction within nanocomposites. As result, demonstrated superior in terms optimal operating temperature, vapor response value, selectivity, response/recovery speed. Notably, 5wt% addition showed lowest temperature (132 °C), fastest speed (28/9 s), highest selectivity against ethanol, methanol, EG. On other hand, 10wt% displayed maximum value (55.1 100 ppm) at an 138 °C, along relatively good repeatability, stability, selectivity.